Remove debug code

Since we fail to write files to $USER/.config on Jenkins jobs, we need
an option to skip installing systemd units.
Let's add --without-systemd to do that.

Also, to detect the option availability, we need to increment
relocatable package version.

See scylladb/scylla-dtest#2819

.github/CODEOWNERS

@@ -0,0 +1 @@
+* @penberg

.gitignore

@@ -0,0 +1,9 @@
+/target/
+/bin/
+dependency-reduced-pom.xml
+scylla-apiclient/target/
+.classpath
+.project
+.settings
+build/
+/.idea/

README.md

@@ -1,22 +1,25 @@
-# Urchin JMX Interface
+# Scylla JMX Server
-This is the JMX interface for Scylla
+
-## Compile
+Scylla JMX server implements the Apache Cassandra JMX interface for compatibility with tooling such as `nodetool`. The JMX server uses Scylla's REST API to communicate with a Scylla server.
-To compile do:
+
-```
+## Compiling
-mvn install
+
+To compile JMX server, run:
+
+```console
+$ mvn --file scylla-jmx-parent/pom.xml package
 ```
 
-## Run
+## Running
-The maven will create an uber-jar with all dependency under the target directory. You should run it with the remote jmx enable so the nodetool will be able to connect to it.
 
-```
+To start the JMX server, run:
-java -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=7199 -Dcom.sun.management.jmxremote.local.only=false -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -jar target/scylla-jmx-1.0.jar
+
+```console
+$ ./scripts/scylla-jmx
 ```
 
-## Setting IP and Port
+To get help on supported options:
-By default the the JMX would connect to a node on the localhost
-on port 10000.
 
-The jmx API uses the system properties to set the IP address and Port.
+```console
-To change the ip address use the apiaddress property (e.g. -Dapiaddress=1.1.1.1)
+$ ./scripts/scylla-jmx --help
-To change the port use the apiport (e.g. -Dapiport=10001)
+```

SCYLLA-VERSION-GEN

@@ -1,19 +1,49 @@
 #!/bin/sh
 
-VERSION=0.18.2
+PRODUCT=scylla
+VERSION=666.development
 
 if test -f version
 then
 	SCYLLA_VERSION=$(cat version | awk -F'-' '{print $1}')
 	SCYLLA_RELEASE=$(cat version | awk -F'-' '{print $2}')
 else
-	DATE=$(date +%Y%m%d)
+	DATE=$(date --utc +%Y%m%d)
 	GIT_COMMIT=$(git log --pretty=format:'%h' -n 1)
 	SCYLLA_VERSION=$VERSION
 	SCYLLA_RELEASE=$DATE.$GIT_COMMIT
 fi
 
+usage() {
+    echo "usage: $0"
+    echo "           [--version product-version-release]          # override p-v-r"
+    exit 1
+}
+
+OVERRIDE=
+while [[ $# > 0 ]]; do
+    case "$1" in
+	--version)
+	    OVERRIDE="$2"
+	    shift 2
+	    ;;
+	*)
+	    usage
+	    ;;
+    esac
+done
+
+if [[ -n "$OVERRIDE" ]]; then
+    # regular expression for p-v-r: alphabetic+dashes for product, trailing non-dashes
+    # for release, everything else for version
+    RE='^([-a-z]+)-(.+)-([^-]+)$'
+    PRODUCT="$(sed -E "s/$RE/\\1/" <<<"$OVERRIDE")"
+    SCYLLA_VERSION="$(sed -E "s/$RE/\\2/" <<<"$OVERRIDE")"
+    SCYLLA_RELEASE="$(sed -E "s/$RE/\\3/" <<<"$OVERRIDE")"
+fi
+
 echo "$SCYLLA_VERSION-$SCYLLA_RELEASE"
 mkdir -p build
 echo "$SCYLLA_VERSION" > build/SCYLLA-VERSION-FILE
 echo "$SCYLLA_RELEASE" > build/SCYLLA-RELEASE-FILE
+echo "$PRODUCT" > build/SCYLLA-PRODUCT-FILE

dist/common/sysconfig/scylla-jmx

@@ -3,3 +3,30 @@ SCYLLA_HOME=/var/lib/scylla
 
 # scylla config dir
 SCYLLA_CONF=/etc/scylla
+
+# The jmx port to open
+# SCYLLA_JMX_PORT="-jp 7199"
+
+# The API port to connect to
+#SCYLLA_API_PORT="-p 10000"
+
+# API address to connect to
+#SCYLLA_API_ADDR="-a localhost"
+
+# use alternate jmx address
+#SCYLLA_JMX_ADDR="-ja localhost"
+
+# A configuration file to use
+#SCYLLA_JMX_FILE="-cf /etc/scylla.d/scylla-user.cfg"
+
+# The location of the jmx proxy jar file
+SCYLLA_JMX_LOCAL="-l /opt/scylladb/jmx"
+
+# allow to run remotely
+#SCYLLA_JMX_REMOTE="-r"
+
+# allow debug
+#SCYLLA_JMX_DEBUG="-d"
+
+# specify JVM options
+JAVA_TOOL_OPTIONS=""

dist/common/systemd/scylla-jmx.service

@@ -8,9 +8,11 @@ Type=simple
 EnvironmentFile=/etc/sysconfig/scylla-jmx
 User=scylla
 Group=scylla
-ExecStart=/usr/lib/scylla/jmx/scylla-jmx -l /usr/lib/scylla/jmx
+ExecStart=/opt/scylladb/jmx/scylla-jmx $SCYLLA_JMX_PORT $SCYLLA_API_PORT $SCYLLA_API_ADDR $SCYLLA_JMX_ADDR $SCYLLA_JMX_FILE $SCYLLA_JMX_LOCAL $SCYLLA_JMX_REMOTE $SCYLLA_JMX_DEBUG
 KillMode=process
 Restart=on-abnormal
+Slice=scylla-helper.slice
+WorkingDirectory=/var/lib/scylla
 
 [Install]
 WantedBy=multi-user.target

dist/debian/changelog.template

@@ -1,4 +1,4 @@
-scylla-jmx (@@VERSION@@-@@RELEASE@@-ubuntu1) trusty; urgency=medium
+%{product}-jmx (%{version}-%{release}-%{revision}) %{codename}; urgency=medium
 
   * Initial release.
 

dist/debian/control.template

@@ -0,0 +1,14 @@
+Source: %{product}-jmx
+Maintainer: Takuya ASADA <syuu@scylladb.com>
+Homepage: http://scylladb.com
+Section: database
+Priority: optional
+Standards-Version: 3.9.5
+Rules-Requires-Root: no
+
+Package: %{product}-jmx
+Architecture: all
+Depends: ${shlibs:Depends}, ${misc:Depends}, openjdk-8-jre-headless | openjdk-8-jre | oracle-java8-set-default | adoptopenjdk-8-hotspot-jre | openjdk-11-jre-headless | openjdk-11-jre |oracle-java11-set-default , %{product}-server
+Description: Scylla JMX server binaries 
+ Scylla is a highly scalable, eventually consistent, distributed,
+ partitioned row DB.

dist/debian/debian/rules

@@ -0,0 +1,23 @@
+#!/usr/bin/make -f
+
+include /usr/share/dpkg/pkg-info.mk
+
+override_dh_auto_build:
+
+override_dh_auto_clean:
+
+override_dh_auto_install:
+	dh_auto_install
+	cd scylla-jmx; ./install.sh --packaging --root "$(CURDIR)/debian/tmp" --sysconfdir /etc/default
+
+override_dh_installinit:
+ifeq ($(DEB_SOURCE),scylla-jmx)
+	dh_installinit --no-start
+else
+	dh_installinit --no-start --name scylla-jmx
+endif
+
+override_dh_strip_nondeterminism:
+
+%:
+	dh $@

dist/debian/debian/scylla-jmx.install

@@ -0,0 +1,4 @@
+etc/default/scylla-jmx
+etc/systemd/system/scylla-jmx.service.d/sysconfdir.conf
+opt/scylladb/jmx/*
+usr/lib/scylla/jmx/*

dist/debian/debian/scylla-jmx.postinst

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+if [ -d /run/systemd/system ]; then
+    systemctl --system daemon-reload >/dev/null || true
+fi
+
+#DEBHELPER#

dist/debian/debian/scylla-jmx.postrm

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+if [ -d /run/systemd/system ]; then
+    systemctl --system daemon-reload >/dev/null || true
+fi
+
+ #DEBHELPER#

dist/debian/debian/scylla-jmx.service

@@ -0,0 +1 @@
+../../common/systemd/scylla-jmx.service

dist/debian/debian_files_gen.py

@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2020 ScyllaDB
+#
+
+#
+# This file is part of Scylla.
+#
+# Scylla is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Scylla is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Scylla.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+import string
+import os
+import shutil
+import re
+from pathlib import Path
+
+class DebianFilesTemplate(string.Template):
+    delimiter = '%'
+
+scriptdir = os.path.dirname(__file__)
+
+with open(os.path.join(scriptdir, 'changelog.template')) as f:
+    changelog_template = f.read()
+
+with open(os.path.join(scriptdir, 'control.template')) as f:
+    control_template = f.read()
+
+with open('build/SCYLLA-PRODUCT-FILE') as f:
+    product = f.read().strip()
+
+with open('build/SCYLLA-VERSION-FILE') as f:
+    version = f.read().strip().replace('.rc', '~rc').replace('_', '-')
+
+with open('build/SCYLLA-RELEASE-FILE') as f:
+    release = f.read().strip()
+
+if os.path.exists('build/debian/debian'):
+    shutil.rmtree('build/debian/debian')
+shutil.copytree('dist/debian/debian', 'build/debian/debian')
+
+if product != 'scylla':
+    for p in Path('build/debian/debian').glob('scylla-*'):
+        # pat1: scylla-server.service
+        #    -> scylla-enterprise-server.scylla-server.service
+        # pat2: scylla-server.scylla-fstrim.service
+        #    -> scylla-enterprise-server.scylla-fstrim.service
+        # pat3: scylla-conf.install
+        #    -> scylla-enterprise-conf.install
+
+        if m := re.match(r'^scylla(-[^.]+)\.service$', p.name):
+            p.rename(p.parent / f'{product}{m.group(1)}.{p.name}')
+        elif m := re.match(r'^scylla(-[^.]+\.scylla-[^.]+\.[^.]+)$', p.name):
+            p.rename(p.parent / f'{product}{m.group(1)}')
+        else:
+            p.rename(p.parent / p.name.replace('scylla', product, 1))
+
+s = DebianFilesTemplate(changelog_template)
+changelog_applied = s.substitute(product=product, version=version, release=release, revision='1', codename='stable')
+
+s = DebianFilesTemplate(control_template)
+control_applied = s.substitute(product=product)
+
+with open('build/debian/debian/changelog', 'w') as f:
+    f.write(changelog_applied)
+
+with open('build/debian/debian/control', 'w') as f:
+    f.write(control_applied)

dist/redhat/build_rpm.sh

@@ -1,34 +0,0 @@
-#!/bin/sh -e
-
-RPMBUILD=`pwd`/build/rpmbuild
-
-if [ ! -e dist/redhat/build_rpm.sh ]; then
-    echo "run build_rpm.sh in top of scylla-jmx dir"
-    exit 1
-fi
-
-sudo yum install -y rpm-build git
-
-OS=`awk '{print $1}' /etc/redhat-release`
-if [ "$OS" = "Fedora" ] && [ ! -f /usr/bin/mock ]; then
-    sudo yum -y install mock
-elif [ "$OS" = "CentOS" ] && [ ! -f /usr/bin/yum-builddep ]; then
-    sudo yum -y install yum-utils
-fi
-
-VERSION=$(./SCYLLA-VERSION-GEN)
-SCYLLA_VERSION=$(cat build/SCYLLA-VERSION-FILE)
-SCYLLA_RELEASE=$(cat build/SCYLLA-RELEASE-FILE)
-mkdir -p $RPMBUILD/{BUILD,BUILDROOT,RPMS,SOURCES,SPECS,SRPMS}
-git archive --format=tar --prefix=scylla-jmx-$SCYLLA_VERSION/ HEAD -o build/rpmbuild/SOURCES/scylla-jmx-$VERSION.tar
-cp dist/redhat/scylla-jmx.spec.in $RPMBUILD/SPECS/scylla-jmx.spec
-sed -i -e "s/@@VERSION@@/$SCYLLA_VERSION/g" $RPMBUILD/SPECS/scylla-jmx.spec
-sed -i -e "s/@@RELEASE@@/$SCYLLA_RELEASE/g" $RPMBUILD/SPECS/scylla-jmx.spec
-
-if [ "$OS" = "Fedora" ]; then
-    rpmbuild -bs --define "_topdir $RPMBUILD" $RPMBUILD/SPECS/scylla-jmx.spec
-    /usr/bin/mock rebuild --resultdir=`pwd`/build/rpms $RPMBUILD/SRPMS/scylla-jmx-$VERSION*.src.rpm
-else
-    sudo yum-builddep -y  $RPMBUILD/SPECS/scylla-jmx.spec
-    rpmbuild -ba --define "_topdir $RPMBUILD" $RPMBUILD/SPECS/scylla-jmx.spec
-fi

dist/redhat/scylla-jmx.spec

@@ -1,39 +1,29 @@
-Name:           scylla-jmx
+Name:           %{product}-jmx
-Version:        @@VERSION@@
+Version:        %{version}
-Release:        @@RELEASE@@%{?dist}
+Release:        %{release}%{?dist}
 Summary:        Scylla JMX
 Group:          Applications/Databases
 
 License:        AGPLv3
 URL:            http://www.scylladb.com/
-Source0:        %{name}-@@VERSION@@-@@RELEASE@@.tar
+Source0:        %{reloc_pkg}
 
 BuildArch:      noarch
-BuildRequires:  maven systemd-units java-devel
+BuildRequires:  systemd-units
-Requires:       scylla-server java-headless
+Requires:       %{product}-server jre-1.8.0-headless
+AutoReqProv:    no
 
 %description
 
 
 %prep
-%setup -q
+%setup -q -n scylla-jmx
 
 
 %build
-mvn install
 
 %install
-rm -rf $RPM_BUILD_ROOT
+./install.sh --packaging --root "$RPM_BUILD_ROOT"
-mkdir -p $RPM_BUILD_ROOT%{_sysconfdir}/sysconfig/
-mkdir -p $RPM_BUILD_ROOT%{_unitdir}
-mkdir -p $RPM_BUILD_ROOT%{_prefix}/lib/scylla/
-
-install -m644 dist/common/sysconfig/scylla-jmx $RPM_BUILD_ROOT%{_sysconfdir}/sysconfig/
-install -m644 dist/redhat/systemd/scylla-jmx.service $RPM_BUILD_ROOT%{_unitdir}/
-install -d -m755 $RPM_BUILD_ROOT%{_prefix}/lib/scylla
-install -d -m755 $RPM_BUILD_ROOT%{_prefix}/lib/scylla/jmx
-install -m644 target/scylla-jmx-1.0.jar $RPM_BUILD_ROOT%{_prefix}/lib/scylla/jmx/
-install -m755 scripts/scylla-jmx $RPM_BUILD_ROOT%{_prefix}/lib/scylla/jmx
 
 %pre
 /usr/sbin/groupadd scylla 2> /dev/null || :
@@ -49,13 +39,20 @@ echo
 fi
 
 %post
-%systemd_post scylla-jmx.service
+if [ $1 -eq 1 ] ; then
+    /usr/bin/systemctl preset scylla-jmx.service ||:
+fi
+
+/usr/bin/systemctl daemon-reload ||:
 
 %preun
-%systemd_preun scylla-jmx.service
+if [ $1 -eq 0 ] ; then
+    /usr/bin/systemctl --no-reload disable scylla-jmx.service ||:
+    /usr/bin/systemctl stop scylla-jmx.service ||:
+fi
 
 %postun
-%systemd_postun
+/usr/bin/systemctl daemon-reload ||:
 
 %clean
 rm -rf $RPM_BUILD_ROOT
@@ -66,8 +63,12 @@ rm -rf $RPM_BUILD_ROOT
 
 %config(noreplace) %{_sysconfdir}/sysconfig/scylla-jmx
 %{_unitdir}/scylla-jmx.service
+/opt/scylladb/jmx/scylla-jmx
+/opt/scylladb/jmx/scylla-jmx-1.1.jar
+/opt/scylladb/jmx/symlinks/scylla-jmx
 %{_prefix}/lib/scylla/jmx/scylla-jmx
-%{_prefix}/lib/scylla/jmx/scylla-jmx-1.0.jar
+%{_prefix}/lib/scylla/jmx/scylla-jmx-1.1.jar
+%{_prefix}/lib/scylla/jmx/symlinks/scylla-jmx
 
 %changelog
 * Fri Aug  7 2015 Takuya ASADA Takuya ASADA <syuu@cloudius-systems.com>

dist/ubuntu/build_deb.sh

@@ -1,27 +0,0 @@
-#!/bin/sh -e
-
-if [ ! -e dist/ubuntu/build_deb.sh ]; then
-    echo "run build_deb.sh in top of scylla dir"
-    exit 1
-fi
-
-if [ -e debian ] || [ -e build ] || [ -e target ] || [ -e m2 ] || [ -e dependency-reduced-pom.xml ]; then
-    rm -rf debian build target m2 dependency-reduced-pom.xml
-fi
-
-VERSION=$(./SCYLLA-VERSION-GEN)
-SCYLLA_VERSION=$(cat build/SCYLLA-VERSION-FILE)
-SCYLLA_RELEASE=$(cat build/SCYLLA-RELEASE-FILE)
-if [ "$SCYLLA_VERSION" = "development" ]; then
-	SCYLLA_VERSION=0development
-fi
-echo $VERSION > version
-./scripts/git-archive-all --extra version --force-submodules --prefix scylla-jmx ../scylla-jmx_$SCYLLA_VERSION-$SCYLLA_RELEASE.orig.tar.gz 
-
-cp -a dist/ubuntu/debian debian
-cp dist/ubuntu/changelog.in debian/changelog
-sed -i -e "s/@@VERSION@@/$SCYLLA_VERSION/g" debian/changelog
-sed -i -e "s/@@RELEASE@@/$SCYLLA_RELEASE/g" debian/changelog
-
-sudo apt-get -y install debhelper maven openjdk-7-jdk devscripts
-debuild -r fakeroot -us -uc

dist/ubuntu/debian/control

@@ -1,14 +0,0 @@
-Source: scylla-jmx
-Maintainer: Takuya ASADA <syuu@scylladb.com>
-Homepage: http://scylladb.com
-Section: database
-Priority: optional
-Standards-Version: 3.9.5
-Build-Depends: debhelper (>= 9), maven, openjdk-7-jdk
-
-Package: scylla-jmx
-Architecture: all
-Depends: ${shlibs:Depends}, ${misc:Depends}, openjdk-7-jre-headless, scylla-server
-Description: Scylla JMX server binaries 
- Scylla is a highly scalable, eventually consistent, distributed,
- partitioned row DB.

dist/ubuntu/debian/rules

@@ -1,27 +0,0 @@
-#!/usr/bin/make -f
-
-DOC = $(CURDIR)/debian/scylla-jmx/usr/share/doc/scylla-jmx
-DEST = $(CURDIR)/debian/scylla-jmx/usr/lib/scylla/jmx
-M2_REPO= $(CURDIR)/m2
-
-override_dh_auto_build:
-	mvn -Dmaven.repo.local=$(M2_REPO) install
-
-override_dh_auto_clean:
-	rm -rf target m2
-
-override_dh_auto_install:
-	mkdir -p $(CURDIR)/debian/scylla-jmx/etc/default/ && \
-	cp $(CURDIR)/dist/common/sysconfig/scylla-jmx  \
-		$(CURDIR)/debian/scylla-jmx/etc/default/
-
-	mkdir -p $(DOC) && \
-	cp $(CURDIR)/*.md $(DOC)
-	cp $(CURDIR)/NOTICE $(DOC)
-
-	mkdir -p $(DEST)
-	cp $(CURDIR)/scripts/scylla-jmx $(DEST)
-	cp $(CURDIR)/target/scylla-jmx-1.0.jar $(DEST)
-
-%:
-	dh $@

dist/ubuntu/debian/scylla-jmx.init

@@ -1,102 +0,0 @@
-#! /bin/sh
-### BEGIN INIT INFO
-# Provides:          scylla-jmx
-# Required-Start:	$remote_fs $syslog scylla-server
-# Required-Stop:	$remote_fs $syslog scylla-server
-# Default-Start:     2 3 4 5
-# Default-Stop:      0 1 6
-# Short-Description: Scylla JMX server
-# Description:        Scylla is a highly scalable, eventually consistent,
-#		      distributed, partitioned row DB.
-### END INIT INFO
-
-#
-# Author: Takuya ASADA<syuu@scylladb.com>
-#
-
-# PATH should only include /usr/* if it runs after the mountnfs.sh script
-PATH=/sbin:/usr/sbin:/bin:/usr/bin
-DESC="Scylla JMX server"
-NAME=scylla-jmx
-
-SCYLLA_JMX=scylla-jmx
-PIDFILE=/var/run/scylla-jmx.pid
-
-SCRIPTNAME=/etc/init.d/$NAME
-
-# Exit if the package is not installed
-[ -x "$DAEMON" ] || exit 0
-
-# Read configuration variable file if it is present
-[ -r /etc/default/$NAME ] && . /etc/default/$NAME
-export SCYLLA_HOME SCYLLA_CONF
-DAEMON=/usr/lib/scylla/jmx/scylla-jmx -l /usr/lib/scylla/jmx
-
-# Define LSB log_* functions.
-. /lib/lsb/init-functions
-
-do_start()
-{
-	# Return
-	#   0 if daemon has been started
-	#   1 if daemon was already running
-	#   other if daemon could not be started or a failure occured
-	start-stop-daemon --start --quiet --pidfile $PIDFILE --make-pidfile --background --user scylla --exec $DAEMON
-}
-
-do_stop()
-{
-	# Return
-	#   0 if daemon has been stopped
-	#   1 if daemon was already stopped
-	#   other if daemon could not be stopped or a failure occurred
-	start-stop-daemon --stop --quiet --pidfile $PIDFILE --retry 5
-	 /usr/lib/scylla/scylla_stop
-}
-
-case "$1" in
-  start)
-	if init_is_upstart; then
-		exit 1
-	fi
-	log_daemon_msg "Starting $DESC" "$SCYLLA_SERVER"
-	do_start
-	case "$?" in
-		0) log_end_msg 0 ;;
-		1) log_progress_msg "already started"
-		   log_end_msg 0 ;;
-		*) log_end_msg 1 ;;
-	esac
-
-	;;
-  stop)
-	if init_is_upstart; then
-		exit 0
-	fi
-	log_daemon_msg "Stopping $DESC" "$SCYLLA_SERVER"
-	do_stop
-	case "$?" in
-		0) log_end_msg 0 ;;
-		1) log_progress_msg "already stopped"
-		   log_end_msg 0 ;;
-		*) log_end_msg 1 ;;
-	esac
-
-	;;
-  restart|force-reload)
-	if init_is_upstart; then
-		exit 1
-	fi
-	$0 stop
-	$0 start
-	;;
-  status)
-	status_of_proc -p $PIDFILE $DAEMON $SCYLLA_SERVER && exit 0 || exit $?
-	;;
-  *)
-	echo "Usage: $SCRIPTNAME {start|stop|rotate|restart|force-reload|status}" >&2
-	exit 3
-	;;
-esac
-
-:

dist/ubuntu/debian/scylla-jmx.upstart

@@ -1,21 +0,0 @@
-# scylla-jmx - ScyllaDB
-#
-# ScyllaDB
-
-description	"ScyllaDB jmx"
-
-start on started scylla-server
-stop on stopping scylla-server
-
-umask 022
-
-console log
-
-setuid scylla
-setgid scylla
-
-script
-    . /etc/default/scylla-jmx
-    export SCYLLA_HOME SCYLLA_CONF
-    exec /usr/lib/scylla/jmx/scylla-jmx -l /usr/lib/scylla/jmx
-end script

install-dependencies.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+#
+# This file is open source software, licensed to you under the terms
+# of the Apache License, Version 2.0 (the "License").  See the NOTICE file
+# distributed with this work for additional information regarding copyright
+# ownership.  You may not use this file except in compliance with the License.
+#
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+. /etc/os-release
+
+if [ "$ID" = "ubuntu" ] || [ "$ID" = "debian" ]; then
+    apt -y install maven openjdk-8-jdk-headless
+elif [ "$ID" = "fedora" ] || [ "$ID" = "centos" ]; then
+    dnf install -y maven java-1.8.0-openjdk-devel
+fi

install.sh

@@ -0,0 +1,173 @@
+#!/bin/bash
+#
+# Copyright (C) 2019 ScyllaDB
+#
+
+#
+# This file is part of Scylla.
+#
+# Scylla is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Scylla is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Scylla.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+set -e
+
+print_usage() {
+    cat <<EOF
+Usage: install.sh [options]
+
+Options:
+  --root /path/to/root     alternative install root (default /)
+  --prefix /prefix         directory prefix (default /usr)
+  --nonroot                shortcut of '--disttype nonroot'
+  --sysconfdir /etc/sysconfig   specify sysconfig directory name
+  --packaging               use install.sh for packaging
+  --without-systemd         skip installing systemd units
+  --help                   this helpful message
+EOF
+    exit 1
+}
+
+root=/
+sysconfdir=/etc/sysconfig
+nonroot=false
+packaging=false
+without_systemd=false
+
+while [ $# -gt 0 ]; do
+    case "$1" in
+        "--root")
+            root="$2"
+            shift 2
+            ;;
+        "--prefix")
+            prefix="$2"
+            shift 2
+            ;;
+        "--nonroot")
+            nonroot=true
+            shift 1
+            ;;
+        "--sysconfdir")
+            sysconfdir="$2"
+            shift 2
+            ;;
+        "--packaging")
+            packaging=true
+            shift 1
+            ;;
+        "--without-systemd")
+            without_systemd=true
+            shift 1
+            ;;
+        "--help")
+            shift 1
+	    print_usage
+            ;;
+        *)
+            print_usage
+            ;;
+    esac
+done
+
+check_usermode_support() {
+    user=$(systemctl --help|grep -e '--user')
+    [ -n "$user" ]
+}
+
+if ! $packaging; then
+    has_java=false
+    if [ -x /usr/bin/java ]; then
+        javaver=$(/usr/bin/java -version 2>&1|head -n1|cut -f 3 -d " ")
+        has_java=true
+    fi
+    if ! $has_java; then
+        echo "Please install openjdk-8, openjdk-11, or openjdk-17 before running install.sh."
+        exit 1
+    fi
+fi
+
+if [ -z "$prefix" ]; then
+    if $nonroot; then
+        prefix=~/scylladb
+    else
+        prefix=/opt/scylladb
+    fi
+fi
+
+rprefix=$(realpath -m "$root/$prefix")
+if ! $nonroot; then
+    retc="$root/etc"
+    rsysconfdir="$root/$sysconfdir"
+    rusr="$root/usr"
+    rsystemd="$rusr/lib/systemd/system"
+else
+    retc="$rprefix/etc"
+    rsysconfdir="$rprefix/$sysconfdir"
+    rsystemd="$HOME/.config/systemd/user"
+fi
+
+install -d -m755 "$rsysconfdir"
+if ! $without_systemd; then
+    install -d -m755 "$rsystemd"
+fi
+install -d -m755 "$rprefix/scripts" "$rprefix/jmx" "$rprefix/jmx/symlinks"
+
+install -m644 dist/common/sysconfig/scylla-jmx -Dt "$rsysconfdir"
+if ! $without_systemd; then
+    install -m644 dist/common/systemd/scylla-jmx.service  -Dt "$rsystemd"
+fi
+if ! $nonroot && ! $without_systemd; then
+    if [ "$sysconfdir" != "/etc/sysconfig" ]; then
+        install -d -m755 "$retc"/systemd/system/scylla-jmx.service.d
+        cat << EOS > "$retc"/systemd/system/scylla-jmx.service.d/sysconfdir.conf
+[Service]
+EnvironmentFile=
+EnvironmentFile=$sysconfdir/scylla-jmx
+EOS
+    fi
+elif ! $without_systemd; then
+    install -d -m755 "$rsystemd"/scylla-jmx.service.d
+    cat << EOS > "$rsystemd"/scylla-jmx.service.d/nonroot.conf
+[Service]
+EnvironmentFile=
+EnvironmentFile=$retc/sysconfig/scylla-jmx
+ExecStart=
+ExecStart=$rprefix/jmx/scylla-jmx \$SCYLLA_JMX_PORT \$SCYLLA_API_PORT \$SCYLLA_API_ADDR \$SCYLLA_JMX_ADDR \$SCYLLA_JMX_FILE \$SCYLLA_JMX_LOCAL \$SCYLLA_JMX_REMOTE \$SCYLLA_JMX_DEBUG
+User=
+Group=
+WorkingDirectory=$rprefix
+EOS
+fi
+
+install -m644 scylla-jmx-1.1.jar "$rprefix/jmx"
+install -m755 scylla-jmx "$rprefix/jmx"
+ln -sf /usr/bin/java "$rprefix/jmx/symlinks/scylla-jmx"
+if ! $nonroot; then
+    install -m755 -d "$rusr"/lib/scylla/jmx/symlinks
+    ln -srf "$rprefix"/jmx/scylla-jmx-1.1.jar "$rusr"/lib/scylla/jmx/
+    ln -srf "$rprefix"/jmx/scylla-jmx "$rusr"/lib/scylla/jmx/
+    ln -sf /usr/bin/java "$rusr"/lib/scylla/jmx/symlinks/scylla-jmx
+fi
+
+if $nonroot; then
+    sed -i -e "s#/var/lib/scylla#$rprefix#g" "$rsysconfdir"/scylla-jmx
+    sed -i -e "s#/etc/scylla#$rprefix/etc/scylla#g" "$rsysconfdir"/scylla-jmx
+    sed -i -e "s#/opt/scylladb/jmx#$rprefix/jmx#g" "$rsysconfdir"/scylla-jmx
+    if ! $without_systemd && check_usermode_support; then
+        systemctl --user daemon-reload
+    fi
+    echo "Scylla-JMX non-root install completed."
+elif ! $without_systemd && ! $packaging; then
+    systemctl --system daemon-reload
+fi

pom.xml

@@ -2,92 +2,81 @@
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
-    <groupId>com.scylladb.jmx</groupId>
     <artifactId>scylla-jmx</artifactId>
-    <version>1.0</version>
+    <version>1.1</version>
     <packaging>jar</packaging>
 
+    <parent>
+        <groupId>it.cavallium.scylladb.jmx</groupId>
+        <artifactId>scylla-jmx-parent</artifactId>
+        <version>1.1</version>
+        <relativePath>./scylla-jmx-parent/pom.xml</relativePath>
+    </parent>
+
     <name>Scylla JMX</name>
 
-    <properties>
-        <maven.compiler.target>1.7</maven.compiler.target>
-        <maven.compiler.source>1.7</maven.compiler.source>
-    </properties>
-
     <dependencies>
         <dependency>
-            <groupId>org.yaml</groupId>
+            <groupId>it.cavallium.scylladb.jmx</groupId>
-                <artifactId>snakeyaml</artifactId>
+            <artifactId>scylla-apiclient</artifactId>
-                <version>1.16</version>
+            <version>1.1</version>
-            </dependency>
-        <dependency>
-            <groupId>org.glassfish.jersey.core</groupId>
-            <artifactId>jersey-common</artifactId>
-            <version>2.22.1</version>
-        </dependency>
-        <dependency>
-            <groupId>javax.ws.rs</groupId>
-            <artifactId>javax.ws.rs-api</artifactId>
-            <version>2.0.1</version>
-        </dependency>
-        <dependency>
-            <groupId>javax.ws.rs</groupId>
-            <artifactId>jsr311-api</artifactId>
-            <version>1.1.1</version>
-        </dependency>
-        <dependency>
-            <groupId>org.glassfish.jersey.core</groupId>
-            <artifactId>jersey-client</artifactId>
-            <version>2.22.1</version>
-        </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-api</artifactId>
-            <version>1.7.5</version>
-        </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-simple</artifactId>
-            <version>1.6.4</version>
-        </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-log4j12</artifactId>
-            <version>1.7.5</version>
         </dependency>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.8.2</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.glassfish</groupId>
-            <artifactId>javax.json</artifactId>
-            <version>1.0.4</version>
-        </dependency>
-        <dependency>
-            <groupId>com.google.guava</groupId>
-            <artifactId>guava</artifactId>
-            <version>18.0</version>
-        </dependency>
-        <dependency>
-            <groupId>com.yammer.metrics</groupId>
-            <artifactId>metrics-core</artifactId>
-            <version>2.2.0</version>
-        </dependency>
-        <dependency>
-            <groupId>com.google.collections</groupId>
-            <artifactId>google-collections</artifactId>
-            <version>1.0</version>
-        </dependency>
     </dependencies>
     <build>
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.10.1</version>
+                <configuration>
+                    <source>11</source>
+                    <target>11</target>
+                    <compilerArgs>
+                        <arg>--add-exports</arg>
+                        <arg>java.management/com.sun.jmx.mbeanserver=scylla.jmx</arg>
+                        <arg>--add-exports</arg>
+                        <arg>java.management/com.sun.jmx.interceptor=scylla.jmx</arg>
+                    </compilerArgs>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-shade-plugin</artifactId>
-                <version>2.4.1</version>
+                <version>3.4.1</version>
+                <configuration>
+                    <artifactSet>
+                        <includes>
+                            <include>*:*</include>
+                        </includes>
+                        <excludes>
+                            <exclude>com.sun.activation:jakarta.activation</exclude>
+                        </excludes>
+                    </artifactSet>
+                    <filters>
+                        <filter>
+                            <artifact>*:*</artifact>
+                            <excludes>
+                                <exclude>module-info.class</exclude>
+                                <exclude>META-INF/versions/*/module-info.class</exclude>
+                                <exclude>META-INF/*.SF</exclude>
+                                <exclude>META-INF/*.DSA</exclude>
+                                <exclude>META-INF/*.RSA</exclude>
+                                <exclude>META-INF/MANIFEST.MF</exclude>
+                                <exclude>META-INF/*.MD</exclude>
+                                <exclude>META-INF/*.md</exclude>
+                                <exclude>META-INF/LICENSE</exclude>
+                                <exclude>META-INF/LICENSE.txt</exclude>
+                                <exclude>META-INF/NOTICE</exclude>
+                            </excludes>
+                        </filter>
+                    </filters>
+                </configuration>
                 <executions>
                     <execution>
                         <phase>package</phase>

reloc/build_deb.sh

@@ -0,0 +1,42 @@
+#!/bin/bash -e
+
+print_usage() {
+    echo "build_deb.sh --reloc-pkg build/scylla-jmx-package.tar.gz"
+    echo "  --reloc-pkg specify relocatable package path"
+    echo "  --builddir specify Debian package build path"
+    exit 1
+}
+
+RELOC_PKG=build/scylla-jmx-package.tar.gz
+BUILDDIR=build/debian
+while [ $# -gt 0 ]; do
+    case "$1" in
+        "--reloc-pkg")
+            RELOC_PKG=$2
+            shift 2
+            ;;
+        "--builddir")
+            BUILDDIR="$2"
+            shift 2
+            ;;
+        *)
+            print_usage
+            ;;
+    esac
+done
+
+RELOC_PKG=$(readlink -f $RELOC_PKG)
+rm -rf "$BUILDDIR"/scylla-package "$BUILDDIR"/scylla-package.orig "$BUILDDIR"/debian
+mkdir -p "$BUILDDIR"/scylla-package
+tar -C "$BUILDDIR"/scylla-package -xpf $RELOC_PKG
+cd "$BUILDDIR"/scylla-package
+
+RELOC_PKG=$(readlink -f $RELOC_PKG)
+
+mv scylla-jmx/debian debian
+PKG_NAME=$(dpkg-parsechangelog --show-field Source)
+# XXX: Drop revision number from version string.
+#      Since it always '1', this should be okay for now.
+PKG_VERSION=$(dpkg-parsechangelog --show-field Version |sed -e 's/-1$//')
+ln -fv $RELOC_PKG ../"$PKG_NAME"_"$PKG_VERSION".orig.tar.gz
+debuild -rfakeroot -us -uc

reloc/build_reloc.sh

@@ -0,0 +1,70 @@
+#!/bin/bash -e
+
+. /etc/os-release
+
+print_usage() {
+    echo "build_reloc.sh --clean --nodeps"
+    echo "  --clean clean build directory"
+    echo "  --nodeps    skip installing dependencies"
+    echo "  --version V  product-version-release string (overriding SCYLLA-VERSION-GEN)"
+    exit 1
+}
+
+CLEAN=
+NODEPS=
+VERSION_OVERRIDE=
+while [ $# -gt 0 ]; do
+    case "$1" in
+        "--clean")
+            CLEAN=yes
+            shift 1
+            ;;
+        "--nodeps")
+            NODEPS=yes
+            shift 1
+            ;;
+        "--version")
+            VERSION_OVERRIDE="$2"
+            shift 2
+            ;;
+        *)
+            print_usage
+            ;;
+    esac
+done
+
+VERSION=$(./SCYLLA-VERSION-GEN ${VERSION_OVERRIDE:+ --version "$VERSION_OVERRIDE"})
+# the former command should generate build/SCYLLA-PRODUCT-FILE and some other version
+# related files
+PRODUCT=`cat build/SCYLLA-PRODUCT-FILE`
+DEST="build/$PRODUCT-jmx-$VERSION.noarch.tar.gz"
+
+is_redhat_variant() {
+    [ -f /etc/redhat-release ]
+}
+is_debian_variant() {
+    [ -f /etc/debian_version ]
+}
+
+
+if [ ! -e reloc/build_reloc.sh ]; then
+    echo "run build_reloc.sh in top of scylla dir"
+    exit 1
+fi
+
+if [ "$CLEAN" = "yes" ]; then
+    rm -rf build target
+fi
+
+if [ -f "$DEST" ]; then
+    rm "$DEST"
+fi
+
+if [ -z "$NODEPS" ]; then
+    sudo ./install-dependencies.sh
+fi
+
+mvn -B --file scylla-jmx-parent/pom.xml install
+./SCYLLA-VERSION-GEN ${VERSION_OVERRIDE:+ --version "$VERSION_OVERRIDE"}
+./dist/debian/debian_files_gen.py
+scripts/create-relocatable-package.py "$DEST"

reloc/build_rpm.sh

@@ -0,0 +1,52 @@
+#!/bin/bash -e
+
+print_usage() {
+    echo "build_rpm.sh --reloc-pkg build/scylla-jmx-package.tar.gz"
+    echo "  --reloc-pkg specify relocatable package path"
+    echo "  --builddir specify rpmbuild directory"
+    exit 1
+}
+RELOC_PKG=build/scylla-jmx-package.tar.gz
+BUILDDIR=build/redhat
+while [ $# -gt 0 ]; do
+    case "$1" in
+        "--reloc-pkg")
+            RELOC_PKG=$2
+            shift 2
+            ;;
+        "--builddir")
+            BUILDDIR="$2"
+            shift 2
+            ;;
+        *)
+            print_usage
+            ;;
+    esac
+done
+
+RELOC_PKG=$(readlink -f $RELOC_PKG)
+RPMBUILD=$(readlink -f $BUILDDIR)
+mkdir -p "$BUILDDIR"
+tar -C "$BUILDDIR" -xpf $RELOC_PKG scylla-jmx/SCYLLA-RELEASE-FILE scylla-jmx/SCYLLA-RELOCATABLE-FILE scylla-jmx/SCYLLA-VERSION-FILE scylla-jmx/SCYLLA-PRODUCT-FILE scylla-jmx/dist/redhat
+cd "$BUILDDIR"/scylla-jmx
+
+RELOC_PKG_BASENAME=$(basename "$RELOC_PKG")
+SCYLLA_VERSION=$(cat SCYLLA-VERSION-FILE)
+SCYLLA_RELEASE=$(cat SCYLLA-RELEASE-FILE)
+VERSION=$SCYLLA_VERSION-$SCYLLA_RELEASE
+PRODUCT=$(cat SCYLLA-PRODUCT-FILE)
+
+mkdir -p $RPMBUILD/{BUILD,BUILDROOT,RPMS,SOURCES,SPECS,SRPMS}
+
+ln -fv $RELOC_PKG $RPMBUILD/SOURCES/
+
+parameters=(
+    -D"version $SCYLLA_VERSION"
+    -D"release $SCYLLA_RELEASE"
+    -D"product $PRODUCT"
+    -D"reloc_pkg $RELOC_PKG_BASENAME"
+)
+
+cp dist/redhat/scylla-jmx.spec $RPMBUILD/SPECS
+# this rpm can be install on both fedora / centos7, so drop distribution name from the file name
+rpmbuild -ba "${parameters[@]}" --define '_binary_payload w2.xzdio' --define "_topdir $RPMBUILD" --undefine "dist" $RPMBUILD/SPECS/scylla-jmx.spec

scripts/create-relocatable-package.py

@@ -0,0 +1,64 @@
+#!/usr/bin/python3
+
+#
+# Copyright (C) 2018 ScyllaDB
+#
+
+#
+# This file is part of Scylla.
+#
+# Scylla is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Scylla is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Scylla.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+import argparse
+import io
+import os
+import tarfile
+import pathlib
+
+RELOC_PREFIX='scylla-jmx'
+def reloc_add(self, name, arcname=None, recursive=True, *, filter=None):
+    if arcname:
+        return self.add(name, arcname="{}/{}".format(RELOC_PREFIX, arcname))
+    else:
+        return self.add(name, arcname="{}/{}".format(RELOC_PREFIX, name))
+
+tarfile.TarFile.reloc_add = reloc_add
+
+ap = argparse.ArgumentParser(description='Create a relocatable scylla package.')
+ap.add_argument('dest',
+                help='Destination file (tar format)')
+
+args = ap.parse_args()
+
+output = args.dest
+
+ar = tarfile.open(output, mode='w|gz')
+# relocatable package format version = 2.2
+with open('build/.relocatable_package_version', 'w') as f:
+    f.write('2.2\n')
+ar.add('build/.relocatable_package_version', arcname='.relocatable_package_version')
+
+pathlib.Path('build/SCYLLA-RELOCATABLE-FILE').touch()
+ar.reloc_add('build/SCYLLA-RELOCATABLE-FILE', arcname='SCYLLA-RELOCATABLE-FILE')
+ar.reloc_add('build/SCYLLA-RELEASE-FILE', arcname='SCYLLA-RELEASE-FILE')
+ar.reloc_add('build/SCYLLA-VERSION-FILE', arcname='SCYLLA-VERSION-FILE')
+ar.reloc_add('build/SCYLLA-PRODUCT-FILE', arcname='SCYLLA-PRODUCT-FILE')
+ar.reloc_add('dist')
+ar.reloc_add('install.sh')
+ar.reloc_add('target/scylla-jmx-1.1.jar', arcname='scylla-jmx-1.1.jar')
+ar.reloc_add('scripts/scylla-jmx', arcname='scylla-jmx')
+ar.reloc_add('README.md')
+ar.reloc_add('NOTICE')
+ar.reloc_add('build/debian/debian', arcname='debian')

scripts/scylla-jmx

@@ -1,18 +1,33 @@
-#!/bin/sh
+#!/bin/bash
 #
 #  Copyright (C) 2015 Cloudius Systems, Ltd.
 
 JMX_PORT="7199"
-API_ADDR=""
+JMX_ADDR=
-API_PORT=""
+
+API_ADDR=
+API_PORT=
+
 CONF_FILE=""
+DEBUG=""
 PARAM_HELP="-h"
 PARAM_JMX_PORT="-jp"
+PARAM_JMX_ADDR="-ja"
 PARAM_API_PORT="-p"
 PARAM_ADDR="-a"
 PARAM_LOCATION="-l"
 LOCATION="target"
+LOCATION_SCRIPTS="scripts"
 PARAM_FILE="-cf"
+ALLOW_REMOTE="-r"
+ALLOW_DEBUG="-d"
+REMOTE=0
+HOSTNAME=`hostname`
+
+
+PROPERTIES=
+JMX_AUTH=-Dcom.sun.management.jmxremote.authenticate=false
+JMX_SSL=-Dcom.sun.management.jmxremote.ssl=false
 
 print_help() {
  cat <<HLPEND
@@ -29,8 +44,11 @@ This script receives the following command line arguments:
     $PARAM_JMX_PORT <port> - The jmx port to open
     $PARAM_API_PORT <port> - The API port to connect to
     $PARAM_ADDR <address> - The API address to connect to
+    $PARAM_JMX_ADDR <address> - JMX bind address
     $PARAM_FILE <file> - A configuration file to use
     $PARAM_LOCATION <location> - The location of the jmx proxy jar file
+    $ALLOW_REMOTE - When set allow remote jmx connectivity
+    $ALLOW_DEBUG - When set open debug ports for remote debugger
 HLPEND
 }
 
@@ -45,28 +63,81 @@ do
       API_ADDR="-Dapiaddress="$2
       shift 2
       ;;
-    "$PARAM_PORT")
-      API_ADDR=$2
-      shift 2
-      ;;
     "$PARAM_JMX_PORT")
       JMX_PORT=$2
       shift 2
       ;;
+    "$PARAM_JMX_ADDR")
+      JMX_ADDR=-Dcom.sun.management.jmxremote.host=$2
+      shift 2
+      ;;
     "$PARAM_LOCATION")
       LOCATION=$2
+      LOCATION_SCRIPTS="$2"
       shift 2
       ;;
     "$PARAM_FILE")
       CONF_FILE="-Dapiconfig="$2
       shift 2
       ;;
+    "$ALLOW_REMOTE")
+      REMOTE=1
+      shift 1
+      ;;
     "$PARAM_HELP")
       print_help
       exit 0
       ;;
+    "$ALLOW_DEBUG")
+      DEBUG="-agentlib:jdwp=transport=dt_socket,address=127.0.0.1:7690,server=y,suspend=n"
+      shift 1
+      ;;
+    -Dcom.sun.management.jmxremote.host=*)
+      JMX_ADDR=$1
+      HOSTNAME=${1:36}
+      shift
+      ;;
+    -Dcom.sun.management.jmxremote.authenticate=*)
+      JMX_AUTH=$1
+      shift 1
+      ;;
+    -Dcom.sun.management.jmxremote.ssl=*)
+      JMX_SSL=$1
+      shift 1
+      ;;
+    -Dcom.sun.management.jmxremote.local.only=*)
+      JMX_LOCAL=$1
+      shift 1
+      ;;
+    -D*)
+      PROPERTIES="$PROPERTIES $1"
+      shift 1
+      ;;
     *)
+      echo "Unknown parameter: $1"
+      print_help
+      exit 1
     esac
 done
 
-exec java $API_ADDR $API_PORT $CONF_FILE -Xmx256m -XX:+UseSerialGC -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=$JMX_PORT -Dcom.sun.management.jmxremote.rmi.port=$JMX_PORT -Dcom.sun.management.jmxremote.local.only=false -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -jar $LOCATION/scylla-jmx-1.0.jar
+if [ $REMOTE -eq 0 ]; then
+    if [ -z $JMX_ADDR ]; then
+        JMX_ADDR=-Dcom.sun.management.jmxremote.host=localhost
+    fi
+    HOSTNAME=localhost
+else
+    if [ -z $JMX_LOCAL ]; then
+        JMX_LOCAL=-Dcom.sun.management.jmxremote.local.only=false
+    fi
+fi
+
+"$LOCATION_SCRIPTS"/symlinks/scylla-jmx $DEBUG \
+    $API_PORT $API_ADDR $CONF_FILE -Xmx256m -XX:+UseSerialGC \
+    -XX:+HeapDumpOnOutOfMemoryError \
+    $JMX_AUTH $JMX_SSL $JMX_ADDR $JMX_LOCAL \
+    --add-exports java.management/com.sun.jmx.mbeanserver=ALL-UNNAMED \
+    --add-exports java.management/com.sun.jmx.interceptor=ALL-UNNAMED \
+    -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=$JMX_PORT \
+    -Djava.rmi.server.hostname=$HOSTNAME -Dcom.sun.management.jmxremote.rmi.port=$JMX_PORT \
+    -Djavax.management.builder.initial=com.scylladb.jmx.utils.APIBuilder \
+    $PROPERTIES -jar $LOCATION/scylla-jmx-1.1.jar

scripts/symlinks/scylla-jmx

@@ -0,0 +1 @@
+/usr/bin/java

scylla-apiclient/pom.xml

@@ -0,0 +1,99 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <artifactId>scylla-apiclient</artifactId>
+  <packaging>jar</packaging>
+  <version>1.1</version>
+
+  <parent>
+    <relativePath>../scylla-jmx-parent/pom.xml</relativePath>
+    <groupId>it.cavallium.scylladb.jmx</groupId>
+    <artifactId>scylla-jmx-parent</artifactId>
+    <version>1.1</version>
+  </parent>
+
+  <name>Scylla REST API client</name>
+
+  <properties>
+    <jackson.version>2.14.0</jackson.version>
+    <jackson.databind.version>2.14.0</jackson.databind.version>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.eclipse.parsson</groupId>
+      <artifactId>parsson</artifactId>
+      <version>1.1.1</version>
+    </dependency>
+    <dependency>
+      <groupId>org.yaml</groupId>
+      <artifactId>snakeyaml</artifactId>
+      <version>1.33</version>
+    </dependency>
+    <dependency>
+      <groupId>org.glassfish.jersey.core</groupId>
+      <artifactId>jersey-common</artifactId>
+      <version>3.1.0</version>
+    </dependency>
+    <dependency>
+      <groupId>jakarta.ws.rs</groupId>
+      <artifactId>jakarta.ws.rs-api</artifactId>
+      <version>3.1.0</version>
+    </dependency>
+    <dependency>
+      <groupId>org.glassfish.jersey.core</groupId>
+      <artifactId>jersey-client</artifactId>
+      <version>3.1.0</version>
+    </dependency>
+    <dependency>
+      <groupId>org.glassfish.jersey.inject</groupId>
+      <artifactId>jersey-hk2</artifactId>
+      <version>3.1.0</version>
+    </dependency>
+    <dependency>
+      <groupId>jakarta.json</groupId>
+      <artifactId>jakarta.json-api</artifactId>
+      <version>2.1.1</version>
+    </dependency>
+    <dependency>
+      <groupId>com.google.guava</groupId>
+      <artifactId>guava</artifactId>
+      <version>31.1-jre</version>
+    </dependency>
+    <dependency>
+      <groupId>jakarta.activation</groupId>
+      <artifactId>jakarta.activation-api</artifactId>
+      <version>2.1.1</version>
+    </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.core</groupId>
+      <artifactId>jackson-annotations</artifactId>
+      <version>${jackson.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.core</groupId>
+      <artifactId>jackson-databind</artifactId>
+      <version>${jackson.databind.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.jakarta.rs</groupId>
+      <artifactId>jackson-jakarta-rs-json-provider</artifactId>
+      <version>2.14.1</version>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.10.1</version>
+        <configuration>
+          <release>11</release>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>

scylla-apiclient/src/main/java/com/scylladb/jmx/api/APIClient.java

@@ -3,44 +3,62 @@
  */
 package com.scylladb.jmx.api;
 
+import com.fasterxml.jackson.jakarta.rs.json.JacksonJsonProvider;
+import jakarta.json.Json;
+import jakarta.json.JsonArray;
+import jakarta.json.JsonObject;
+import jakarta.json.JsonReader;
+import jakarta.json.JsonReaderFactory;
+import jakarta.json.JsonString;
+import jakarta.ws.rs.ProcessingException;
+import jakarta.ws.rs.client.Client;
+import jakarta.ws.rs.client.ClientBuilder;
+import jakarta.ws.rs.client.Entity;
+import jakarta.ws.rs.client.Invocation;
+import jakarta.ws.rs.client.WebTarget;
+import jakarta.ws.rs.core.MediaType;
+import jakarta.ws.rs.core.MultivaluedMap;
+import jakarta.ws.rs.core.Response;
 import java.io.StringReader;
+import java.lang.System.Logger.Level;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Set;
+import java.util.function.BiFunction;
+import java.util.logging.Logger;
 
-import javax.json.Json;
-import javax.json.JsonArray;
-import javax.json.JsonObject;
-import javax.json.JsonReader;
-import javax.json.JsonReaderFactory;
-import javax.json.JsonString;
 import javax.management.openmbean.TabularData;
 import javax.management.openmbean.TabularDataSupport;
-import javax.ws.rs.client.Client;
-import javax.ws.rs.client.ClientBuilder;
-import javax.ws.rs.client.Entity;
-import javax.ws.rs.client.Invocation;
-import javax.ws.rs.client.WebTarget;
-import javax.ws.rs.core.MediaType;
-import javax.ws.rs.core.MultivaluedMap;
-import javax.ws.rs.core.Response;
 
 import org.glassfish.jersey.client.ClientConfig;
 
-import com.scylladb.jmx.utils.EstimatedHistogram;
+import com.scylladb.jmx.api.utils.SnapshotDetailsTabularData;
-import com.scylladb.jmx.utils.SnapshotDetailsTabularData;
-import com.yammer.metrics.core.HistogramValues;
 
 public class APIClient {
-    Map<String, CacheEntry> cache = new HashMap<String, CacheEntry>();
+    private Map<String, CacheEntry> cache = new HashMap<String, CacheEntry>();
-    String getCacheKey(String key, MultivaluedMap<String, String> param, long duration) {
+    private final APIConfig config;
+    private final ClientConfig clientConfig;
+    private final Client client;
+    private JsonReaderFactory factory = Json.createReaderFactory(null);
+
+    private static final Logger logger = Logger.getLogger(APIClient.class.getName());
+
+    public APIClient(APIConfig config) {
+        this.config = config;
+        this.clientConfig = new ClientConfig();
+        clientConfig.register(new JacksonJsonProvider());
+        this.client = ClientBuilder.newClient(clientConfig);
+    }
+
+    private String getCacheKey(String key, MultivaluedMap<String, String> param, long duration) {
         if (duration <= 0) {
             return null;
         }
@@ -55,35 +73,31 @@ public class APIClient {
         return key;
     }
 
-    String getStringFromCache(String key, long duration) {
+    private String getStringFromCache(String key, long duration) {
         if (key == null) {
             return null;
         }
         CacheEntry value = cache.get(key);
-        return (value!= null && value.valid(duration))? value.stringValue() : null;
+        return (value != null && value.valid(duration)) ? value.stringValue() : null;
     }
 
-    EstimatedHistogram getEstimatedHistogramFromCache(String key, long duration) {
+    private JsonObject getJsonObjectFromCache(String key, long duration) {
         if (key == null) {
             return null;
         }
         CacheEntry value = cache.get(key);
-        return (value!= null && value.valid(duration))? value.getEstimatedHistogram() : null;
+        return (value != null && value.valid(duration)) ? value.jsonObject() : null;
     }
 
-    JsonReaderFactory factory = Json.createReaderFactory(null);
-    private static final java.util.logging.Logger logger = java.util.logging.Logger
-            .getLogger(APIClient.class.getName());
 
-    public static String getBaseUrl() {
+    private String getBaseUrl() {
-        return APIConfig.getBaseUrl();
+        return config.getBaseUrl();
     }
 
     public Invocation.Builder get(String path, MultivaluedMap<String, String> queryParams) {
-        Client client =  ClientBuilder.newClient( new ClientConfig());
         WebTarget webTarget = client.target(getBaseUrl()).path(path);
         if (queryParams != null) {
-            for (Entry<String, List<String>> qp :  queryParams.entrySet()) {
+            for (Entry<String, List<String>> qp : queryParams.entrySet()) {
                 for (String e : qp.getValue()) {
                     webTarget = webTarget.queryParam(qp.getKey(), e);
                 }
@@ -97,22 +111,34 @@ public class APIClient {
     }
 
     public Response post(String path, MultivaluedMap<String, String> queryParams) {
-        Response response = get(path, queryParams).post(Entity.entity(null, MediaType.TEXT_PLAIN));
+        return post(path, queryParams, null);
-        if (response.getStatus() != Response.Status.OK.getStatusCode() ) {
+    }
-            throw getException(response.readEntity(String.class));
-        }
-        return response;
 
+    public Response post(String path, MultivaluedMap<String, String> queryParams, Object object, String type) {
+        try {
+            Response response = get(path, queryParams).post(Entity.entity(object, type));
+            if (response.getStatus() != Response.Status.OK.getStatusCode()) {
+                throw getException("Scylla API server HTTP POST to URL '" + path + "' failed",
+                        response.readEntity(String.class));
+            }
+            return response;
+        } catch (ProcessingException e) {
+            throw new IllegalStateException("Unable to connect to Scylla API server: " + e.getMessage());
+        }
+    }
+
+    public Response post(String path, MultivaluedMap<String, String> queryParams, Object object) {
+        return post(path, queryParams, object, MediaType.TEXT_PLAIN);
     }
 
     public void post(String path) {
         post(path, null);
     }
 
-    public RuntimeException getException(String txt) {
+    public IllegalStateException getException(String msg, String json) {
-        JsonReader reader = factory.createReader(new StringReader(txt));
+        JsonReader reader = factory.createReader(new StringReader(json));
         JsonObject res = reader.readObject();
-        return new RuntimeException(res.getString("message"));
+        return new IllegalStateException(msg + ": " + res.getString("message"));
     }
 
     public String postGetVal(String path, MultivaluedMap<String, String> queryParams) {
@@ -132,40 +158,47 @@ public class APIClient {
             get(path, queryParams).delete();
             return;
         }
-        get(path).delete();
+        Response response = get(path).delete();
+        if (response.getStatus() != Response.Status.OK.getStatusCode()) {
+            throw getException("Scylla API server HTTP delete to URL '" + path + "' failed",
+                    response.readEntity(String.class));
+        }
     }
 
     public void delete(String path) {
         delete(path, null);
     }
 
-    public String getRawValue(String string,
+    public String getRawValue(String string, MultivaluedMap<String, String> queryParams, long duration) {
-            MultivaluedMap<String, String> queryParams, long duration) {
+        try {
-        if (string.equals("")) {
+            if (string.equals("")) {
-            return "";
+                return "";
-        }
+            }
-        String key = getCacheKey(string, queryParams, duration);
+            String key = getCacheKey(string, queryParams, duration);
-        String res = getStringFromCache(key, duration);
+            String res = getStringFromCache(key, duration);
-        if (res != null) {
+            if (res != null) {
-            return res;
+                return res;
-        }
+            }
-        Response response = get(string, queryParams).get(Response.class);
+            Response response = get(string, queryParams).get(Response.class);
 
-        if (response.getStatus() != Response.Status.OK.getStatusCode() ) {
+            if (response.getStatus() != Response.Status.OK.getStatusCode()) {
-            // TBD
+                // TBD
-            // We are currently not caching errors,
+                // We are currently not caching errors,
-            // it should be reconsider.
+                // it should be reconsider.
-            throw getException(response.readEntity(String.class));
+                throw getException("Scylla API server HTTP GET to URL '" + string + "' failed",
+                        response.readEntity(String.class));
+            }
+            res = response.readEntity(String.class);
+            if (duration > 0) {
+                cache.put(key, new CacheEntry(res));
+            }
+            return res;
+        } catch (ProcessingException e) {
+            throw new IllegalStateException("Unable to connect to Scylla API server: " + e.getMessage());
         }
-        res = response.readEntity(String.class);
-        if (duration > 0) {
-            cache.put(key, new CacheEntry(res));
-        }
-        return res;
     }
 
-    public String getRawValue(String string,
+    public String getRawValue(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
         return getRawValue(string, queryParams, 0);
     }
 
@@ -178,23 +211,19 @@ public class APIClient {
     }
 
     public String getStringValue(String string, MultivaluedMap<String, String> queryParams) {
-        return getRawValue(string,
+        return getRawValue(string, queryParams).replaceAll("^\"|\"$", "");
-                queryParams).replaceAll("^\"|\"$", "");
     }
 
     public String getStringValue(String string, MultivaluedMap<String, String> queryParams, long duration) {
-        return getRawValue(string,
+        return getRawValue(string, queryParams, duration).replaceAll("^\"|\"$", "");
-                queryParams, duration).replaceAll("^\"|\"$", "");
     }
 
     public String getStringValue(String string) {
         return getStringValue(string, null);
     }
 
-    public JsonReader getReader(String string,
+    public JsonReader getReader(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
+        return factory.createReader(new StringReader(getRawValue(string, queryParams)));
-        return factory.createReader(new StringReader(getRawValue(string,
-                queryParams)));
     }
 
     public JsonReader getReader(String string) {
@@ -206,8 +235,7 @@ public class APIClient {
         return val.toArray(new String[val.size()]);
     }
 
-    public int getIntValue(String string,
+    public int getIntValue(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
         return Integer.parseInt(getRawValue(string, queryParams));
     }
 
@@ -215,6 +243,19 @@ public class APIClient {
         return getIntValue(string, null);
     }
 
+    public static <T> BiFunction<APIClient, String, T> getReader(Class<T> type) {
+        if (type == String.class) {
+            return (c, s) -> type.cast(c.getRawValue(s));
+        } else if (type == Integer.class) {
+            return (c, s) -> type.cast(c.getIntValue(s));
+        } else if (type == Double.class) {
+            return (c, s) -> type.cast(c.getDoubleValue(s));
+        } else if (type == Long.class) {
+            return (c, s) -> type.cast(c.getLongValue(s));
+        }
+        throw new IllegalArgumentException(type.getName());
+    }
+
     public boolean getBooleanValue(String string) {
         return Boolean.parseBoolean(getRawValue(string));
     }
@@ -223,8 +264,7 @@ public class APIClient {
         return Double.parseDouble(getRawValue(string));
     }
 
-    public List<String> getListStrValue(String string,
+    public List<String> getListStrValue(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
         JsonReader reader = getReader(string, queryParams);
         JsonArray arr = reader.readArray();
         List<String> res = new ArrayList<String>(arr.size());
@@ -279,8 +319,7 @@ public class APIClient {
         return join(arr, ",");
     }
 
-    public static String mapToString(Map<String, String> mp, String pairJoin,
+    public static String mapToString(Map<String, String> mp, String pairJoin, String joiner) {
-            String joiner) {
         String res = "";
         if (mp != null) {
             for (String name : mp.keySet()) {
@@ -297,19 +336,15 @@ public class APIClient {
         return mapToString(mp, "=", ",");
     }
 
-    public static boolean set_query_param(
+    public static boolean set_query_param(MultivaluedMap<String, String> queryParams, String key, String value) {
-            MultivaluedMap<String, String> queryParams, String key, String value) {
+        if (queryParams != null && key != null && value != null && !value.equals("")) {
-        if (queryParams != null && key != null && value != null
-                && !value.equals("")) {
             queryParams.add(key, value);
             return true;
         }
         return false;
     }
 
-    public static boolean set_bool_query_param(
+    public static boolean set_bool_query_param(MultivaluedMap<String, String> queryParams, String key, boolean value) {
-            MultivaluedMap<String, String> queryParams, String key,
-            boolean value) {
         if (queryParams != null && key != null && value) {
             queryParams.add(key, "true");
             return true;
@@ -328,8 +363,7 @@ public class APIClient {
         for (int i = 0; i < arr.size(); i++) {
             JsonObject obj = arr.getJsonObject(i);
             if (obj.containsKey("key") && obj.containsKey("value")) {
-                map.put(obj.getString("key"),
+                map.put(obj.getString("key"), listStrFromJArr(obj.getJsonArray("value")));
-                        listStrFromJArr(obj.getJsonArray("value")));
             }
         }
         reader.close();
@@ -351,8 +385,7 @@ public class APIClient {
         for (int i = 0; i < arr.size(); i++) {
             JsonObject obj = arr.getJsonObject(i);
             if (obj.containsKey("key") && obj.containsKey("value")) {
-                map.put(listStrFromJArr(obj.getJsonArray("key")),
+                map.put(listStrFromJArr(obj.getJsonArray("key")), listStrFromJArr(obj.getJsonArray("value")));
-                        listStrFromJArr(obj.getJsonArray("value")));
             }
         }
         reader.close();
@@ -363,8 +396,7 @@ public class APIClient {
         return getMapListStrValue(string, null);
     }
 
-    public Set<String> getSetStringValue(String string,
+    public Set<String> getSetStringValue(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
         JsonReader reader = getReader(string, queryParams);
         JsonArray arr = reader.readArray();
         Set<String> res = new HashSet<String>();
@@ -379,14 +411,13 @@ public class APIClient {
         return getSetStringValue(string, null);
     }
 
-    public Map<String, String> getMapStrValue(String string,
+    public Map<String, String> getMapStrValue(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
         if (string.equals("")) {
             return null;
         }
         JsonReader reader = getReader(string, queryParams);
         JsonArray arr = reader.readArray();
-        Map<String, String> map = new HashMap<String, String>();
+        Map<String, String> map = new LinkedHashMap<String, String>();
         for (int i = 0; i < arr.size(); i++) {
             JsonObject obj = arr.getJsonObject(i);
             if (obj.containsKey("key") && obj.containsKey("value")) {
@@ -401,8 +432,28 @@ public class APIClient {
         return getMapStrValue(string, null);
     }
 
-    public List<InetAddress> getListInetAddressValue(String string,
+    public Map<String, String> getReverseMapStrValue(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
+        if (string.equals("")) {
+            return null;
+        }
+        JsonReader reader = getReader(string, queryParams);
+        JsonArray arr = reader.readArray();
+        Map<String, String> map = new HashMap<String, String>();
+        for (int i = 0; i < arr.size(); i++) {
+            JsonObject obj = arr.getJsonObject(i);
+            if (obj.containsKey("key") && obj.containsKey("value")) {
+                map.put(obj.getString("value"), obj.getString("key"));
+            }
+        }
+        reader.close();
+        return map;
+    }
+
+    public Map<String, String> getReverseMapStrValue(String string) {
+        return getReverseMapStrValue(string, null);
+    }
+
+    public List<InetAddress> getListInetAddressValue(String string, MultivaluedMap<String, String> queryParams) {
         List<String> vals = getListStrValue(string, queryParams);
         List<InetAddress> res = new ArrayList<InetAddress>();
         for (String val : vals) {
@@ -426,22 +477,20 @@ public class APIClient {
     }
 
     private TabularDataSupport getSnapshotData(String key, JsonArray arr) {
-        TabularDataSupport data = new TabularDataSupport(
+        TabularDataSupport data = new TabularDataSupport(SnapshotDetailsTabularData.TABULAR_TYPE);
-                SnapshotDetailsTabularData.TABULAR_TYPE);
 
         for (int i = 0; i < arr.size(); i++) {
             JsonObject obj = arr.getJsonObject(i);
             if (obj.containsKey("ks") && obj.containsKey("cf")) {
-                SnapshotDetailsTabularData.from(key, obj.getString("ks"),
+                SnapshotDetailsTabularData.from(key, obj.getString("ks"), obj.getString("cf"), obj.getJsonNumber("total").longValue(),
-                        obj.getString("cf"), obj.getInt("total"),
+                        obj.getJsonNumber("live").longValue(), data);
-                        obj.getInt("live"), data);
             }
         }
         return data;
     }
 
-    public Map<String, TabularData> getMapStringSnapshotTabularDataValue(
+    public Map<String, TabularData> getMapStringSnapshotTabularDataValue(String string,
-            String string, MultivaluedMap<String, String> queryParams) {
+            MultivaluedMap<String, String> queryParams) {
         if (string.equals("")) {
             return null;
         }
@@ -475,8 +524,7 @@ public class APIClient {
         for (int i = 0; i < arr.size(); i++) {
             try {
                 obj = arr.getJsonObject(i);
-                res.put(InetAddress.getByName(obj.getString("key")),
+                res.put(InetAddress.getByName(obj.getString("key")), Float.parseFloat(obj.getString("value")));
-                        Float.parseFloat(obj.getString("value")));
             } catch (UnknownHostException e) {
                 logger.warning("Bad formatted address " + obj.getString("key"));
             }
@@ -488,8 +536,7 @@ public class APIClient {
         return getMapInetAddressFloatValue(string, null);
     }
 
-    public Map<String, Long> getMapStringLongValue(String string,
+    public Map<String, Long> getMapStringLongValue(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
         Map<String, Long> res = new HashMap<String, Long>();
 
         JsonReader reader = getReader(string, queryParams);
@@ -507,8 +554,7 @@ public class APIClient {
         return getMapStringLongValue(string, null);
     }
 
-    public long[] getLongArrValue(String string,
+    public long[] getLongArrValue(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
         JsonReader reader = getReader(string, queryParams);
         JsonArray arr = reader.readArray();
         long[] res = new long[arr.size()];
@@ -523,8 +569,7 @@ public class APIClient {
         return getLongArrValue(string, null);
     }
 
-    public Map<String, Integer> getMapStringIntegerValue(String string,
+    public Map<String, Integer> getMapStringIntegerValue(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
         Map<String, Integer> res = new HashMap<String, Integer>();
 
         JsonReader reader = getReader(string, queryParams);
@@ -542,8 +587,7 @@ public class APIClient {
         return getMapStringIntegerValue(string, null);
     }
 
-    public int[] getIntArrValue(String string,
+    public int[] getIntArrValue(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
         JsonReader reader = getReader(string, queryParams);
         JsonArray arr = reader.readArray();
         int[] res = new int[arr.size()];
@@ -558,8 +602,7 @@ public class APIClient {
         return getIntArrValue(string, null);
     }
 
-    public Map<String, Long> getListMapStringLongValue(String string,
+    public Map<String, Long> getListMapStringLongValue(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
         if (string.equals("")) {
             return null;
         }
@@ -592,8 +635,7 @@ public class APIClient {
         return getListMapStringLongValue(string, null);
     }
 
-    public JsonArray getJsonArray(String string,
+    public JsonArray getJsonArray(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
         if (string.equals("")) {
             return null;
         }
@@ -607,8 +649,7 @@ public class APIClient {
         return getJsonArray(string, null);
     }
 
-    public List<Map<String, String>> getListMapStrValue(String string,
+    public List<Map<String, String>> getListMapStrValue(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
         JsonArray arr = getJsonArray(string, queryParams);
         List<Map<String, String>> res = new ArrayList<Map<String, String>>();
         for (int i = 0; i < arr.size(); i++) {
@@ -626,64 +667,36 @@ public class APIClient {
         return null;
     }
 
-    public JsonObject getJsonObj(String string,
+    public JsonObject getJsonObj(String string, MultivaluedMap<String, String> queryParams, long duration) {
-            MultivaluedMap<String, String> queryParams) {
         if (string.equals("")) {
             return null;
         }
-        JsonReader reader = getReader(string, queryParams);
-        JsonObject res = reader.readObject();
-        reader.close();
-        return res;
-    }
-
-    public HistogramValues getHistogramValue(String url,
-            MultivaluedMap<String, String> queryParams) {
-        HistogramValues res = new HistogramValues();
-        JsonObject obj = getJsonObj(url, queryParams);
-        res.count = obj.getJsonNumber("count").longValue();
-        res.max = obj.getJsonNumber("max").longValue();
-        res.min = obj.getJsonNumber("min").longValue();
-        res.sum = obj.getJsonNumber("sum").longValue();
-        res.variance = obj.getJsonNumber("variance").doubleValue();
-        res.mean = obj.getJsonNumber("mean").doubleValue();
-        JsonArray arr = obj.getJsonArray("sample");
-        if (arr != null) {
-            res.sample = new long[arr.size()];
-            for (int i = 0; i < arr.size(); i++) {
-                res.sample[i] = arr.getJsonNumber(i).longValue();
-            }
-        }
-        return res;
-    }
-
-    public HistogramValues getHistogramValue(String url) {
-        return getHistogramValue(url, null);
-    }
-
-    public EstimatedHistogram getEstimatedHistogram(String string,
-            MultivaluedMap<String, String> queryParams, long duration) {
         String key = getCacheKey(string, queryParams, duration);
-        EstimatedHistogram res = getEstimatedHistogramFromCache(key, duration);
+        JsonObject res = getJsonObjectFromCache(key, duration);
         if (res != null) {
             return res;
         }
-        res = new EstimatedHistogram(getEstimatedHistogramAsLongArrValue(string, queryParams));
+        JsonReader reader = getReader(string, queryParams);
+        res = reader.readObject();
+        reader.close();
         if (duration > 0) {
             cache.put(key, new CacheEntry(res));
         }
         return res;
-
     }
-    public long[] getEstimatedHistogramAsLongArrValue(String string,
+
-            MultivaluedMap<String, String> queryParams) {
+    public JsonObject getJsonObj(String string, MultivaluedMap<String, String> queryParams) {
+        return getJsonObj(string, queryParams, 0);
+    }
+
+    public long[] getEstimatedHistogramAsLongArrValue(String string, MultivaluedMap<String, String> queryParams) {
         JsonObject obj = getJsonObj(string, queryParams);
         JsonArray arr = obj.getJsonArray("buckets");
         if (arr == null) {
             return new long[0];
         }
         long res[] = new long[arr.size()];
-        for (int i = 0; i< arr.size(); i++) {
+        for (int i = 0; i < arr.size(); i++) {
             res[i] = arr.getJsonNumber(i).longValue();
         }
         return res;
@@ -693,8 +706,7 @@ public class APIClient {
         return getEstimatedHistogramAsLongArrValue(string, null);
     }
 
-    public Map<String, Double> getMapStringDouble(String string,
+    public Map<String, Double> getMapStringDouble(String string, MultivaluedMap<String, String> queryParams) {
-            MultivaluedMap<String, String> queryParams) {
         if (string.equals("")) {
             return null;
         }
@@ -722,6 +734,7 @@ public class APIClient {
         reader.close();
         return map;
     }
+
     public Map<String, Double> getMapStringDouble(String string) {
         return getMapStringDouble(string, null);
     }

scylla-apiclient/src/main/java/com/scylladb/jmx/api/APIConfig.java

@@ -30,23 +30,22 @@ import org.yaml.snakeyaml.Yaml;
  */
 
 public class APIConfig {
-    static String address = "localhost";
+    private String address = "localhost";
-    static String port = "10000";
+    private String port = "10000";
 
-    public static String getAddress() {
+    public String getAddress() {
         return address;
     }
 
-    public static String getPort() {
+    public String getPort() {
         return port;
     }
 
-    public static String getBaseUrl() {
+    public String getBaseUrl() {
-        return "http://" + address + ":"
+        return "http://" + address + ":" + port;
-                + port;
     }
 
-    public static void readFile(String name) {
+    private void readFile(String name) {
         System.out.println("Using config file: " + name);
         InputStream input;
         try {
@@ -61,7 +60,7 @@ public class APIConfig {
                 address = (String) map.get("api_address");
             }
             if (map.containsKey("api_port")) {
-                port = (String) map.get("api_port").toString();
+                port = map.get("api_port").toString();
             }
         } catch (FileNotFoundException e) {
             System.err.println("fail reading from config file: " + name);
@@ -74,7 +73,7 @@ public class APIConfig {
         return varTmpDir.exists();
     }
 
-    public static boolean loadIfExists(String path, String name) {
+    private boolean loadIfExists(String path, String name) {
         if (path == null) {
             return false;
         }
@@ -84,24 +83,21 @@ public class APIConfig {
         readFile(path + name);
         return true;
     }
+
     /**
-     * setConfig load the JMX proxy configuration
+     * setConfig load the JMX proxy configuration The configuration hierarchy is
-     * The configuration hierarchy is as follow:
+     * as follow: Command line argument takes precedence over everything Then
-     * Command line argument takes precedence over everything
+     * configuration file in the command line (command line argument can replace
-     * Then configuration file in the command line (command line
+     * specific values in it. Then SCYLLA_CONF/scylla.yaml Then
-     * argument can replace specific values in it.
+     * SCYLLA_HOME/conf/scylla.yaml Then conf/scylla.yaml Then the default
-     * Then SCYLLA_CONF/scylla.yaml
+     * values With file configuration, to make it clearer what is been used,
-     * Then SCYLLA_HOME/conf/scylla.yaml
+     * only one file will be chosen with the highest precedence
-     * Then conf/scylla.yaml
-     * Then the default values
-     * With file configuration, to make it clearer what is been used, only
-     * one file will be chosen with the highest precedence
      */
-    public static void setConfig() {
+    public APIConfig() {
-        if (!System.getProperty("apiconfig","").equals("")) {
+        if (!System.getProperty("apiconfig", "").equals("")) {
             readFile(System.getProperty("apiconfig"));
-        } else if (!loadIfExists(System.getenv("SCYLLA_CONF"), "/scylla.yaml") &&
+        } else if (!loadIfExists(System.getenv("SCYLLA_CONF"), "/scylla.yaml")
-            !loadIfExists(System.getenv("SCYLLA_HOME"), "/conf/scylla.yaml")) {
+                && !loadIfExists(System.getenv("SCYLLA_HOME"), "/conf/scylla.yaml")) {
             loadIfExists("", "conf/scylla.yaml");
         }
 

scylla-apiclient/src/main/java/com/scylladb/jmx/api/CacheEntry.java

@@ -21,13 +21,14 @@
 
 package com.scylladb.jmx.api;
 
-import com.scylladb.jmx.utils.EstimatedHistogram;
 
-public class CacheEntry {
+import jakarta.json.JsonObject;
-    long time;
-    Object value;
 
-    CacheEntry(Object res) {
+class CacheEntry {
+    private long time;
+    private Object value;
+
+    public CacheEntry(Object res) {
         time = System.currentTimeMillis();
         this.value = res;
     }
@@ -40,7 +41,7 @@ public class CacheEntry {
         return (String) value;
     }
 
-    public EstimatedHistogram getEstimatedHistogram() {
+    public JsonObject jsonObject() {
-        return (EstimatedHistogram)value;
+        return (JsonObject) value;
     }
 }

scylla-apiclient/src/main/java/com/scylladb/jmx/api/utils/FileUtils.java

@@ -22,71 +22,59 @@
  * Modified by Cloudius Systems
  */
 
-package com.scylladb.jmx.utils;
+package com.scylladb.jmx.api.utils;
 
-import java.io.*;
+import java.io.File;
 import java.text.DecimalFormat;
 
-public class FileUtils
+public class FileUtils {
-{
     private static final double KB = 1024d;
-    private static final double MB = 1024*1024d;
+    private static final double MB = 1024 * 1024d;
-    private static final double GB = 1024*1024*1024d;
+    private static final double GB = 1024 * 1024 * 1024d;
-    private static final double TB = 1024*1024*1024*1024d;
+    private static final double TB = 1024 * 1024 * 1024 * 1024d;
 
     private static final DecimalFormat df = new DecimalFormat("#.##");
 
-
+    public static String stringifyFileSize(double value) {
-    public static String stringifyFileSize(double value)
-    {
         double d;
-        if ( value >= TB )
+        if (value >= TB) {
-        {
             d = value / TB;
             String val = df.format(d);
             return val + " TB";
-        }
+        } else if (value >= GB) {
-        else if ( value >= GB )
-        {
             d = value / GB;
             String val = df.format(d);
             return val + " GB";
-        }
+        } else if (value >= MB) {
-        else if ( value >= MB )
-        {
             d = value / MB;
             String val = df.format(d);
             return val + " MB";
-        }
+        } else if (value >= KB) {
-        else if ( value >= KB )
-        {
             d = value / KB;
             String val = df.format(d);
             return val + " KB";
-        }
+        } else {
-        else
-        {
             String val = df.format(value);
             return val + " bytes";
         }
     }
 
- 
     /**
      * Get the size of a directory in bytes
-     * @param directory The directory for which we need size.
+     * 
+     * @param directory
+     *            The directory for which we need size.
      * @return The size of the directory
      */
-    public static long folderSize(File directory)
+    public static long folderSize(File directory) {
-    {
         long length = 0;
-        for (File file : directory.listFiles())
+        for (File file : directory.listFiles()) {
-        {
+            if (file.isFile()) {
-            if (file.isFile())
                 length += file.length();
-            else
+            } else {
                 length += folderSize(file);
+            }
         }
         return length;
     }
- }
+}

scylla-apiclient/src/main/java/com/scylladb/jmx/api/utils/Pair.java

@@ -22,47 +22,42 @@
  * Modified by Cloudius Systems
  */
 
-package com.scylladb.jmx.utils;
+package com.scylladb.jmx.api.utils;
 
 import com.google.common.base.Objects;
 
-public class Pair<T1, T2>
+public class Pair<T1, T2> {
-{
     public final T1 left;
     public final T2 right;
 
-    protected Pair(T1 left, T2 right)
+    protected Pair(T1 left, T2 right) {
-    {
         this.left = left;
         this.right = right;
     }
 
     @Override
-    public final int hashCode()
+    public final int hashCode() {
-    {
         int hashCode = 31 + (left == null ? 0 : left.hashCode());
-        return 31*hashCode + (right == null ? 0 : right.hashCode());
+        return 31 * hashCode + (right == null ? 0 : right.hashCode());
     }
 
     @Override
-    public final boolean equals(Object o)
+    public final boolean equals(Object o) {
-    {
+        if (!(o instanceof Pair)) {
-        if(!(o instanceof Pair))
             return false;
+        }
         @SuppressWarnings("rawtypes")
-        Pair that = (Pair)o;
+        Pair that = (Pair) o;
         // handles nulls properly
         return Objects.equal(left, that.left) && Objects.equal(right, that.right);
     }
 
     @Override
-    public String toString()
+    public String toString() {
-    {
         return "(" + left + "," + right + ")";
     }
 
-    public static <X, Y> Pair<X, Y> create(X x, Y y)
+    public static <X, Y> Pair<X, Y> create(X x, Y y) {
-    {
         return new Pair<X, Y>(x, y);
     }
 }

scylla-apiclient/src/main/java/com/scylladb/jmx/api/utils/SnapshotDetailsTabularData.java

@@ -20,21 +20,27 @@
  *
  * Modified by Cloudius Systems
  */
-package com.scylladb.jmx.utils;
+package com.scylladb.jmx.api.utils;
 
 import java.util.Map;
-import javax.management.openmbean.*;
+
+import javax.management.openmbean.CompositeDataSupport;
+import javax.management.openmbean.CompositeType;
+import javax.management.openmbean.OpenDataException;
+import javax.management.openmbean.OpenType;
+import javax.management.openmbean.SimpleType;
+import javax.management.openmbean.TabularDataSupport;
+import javax.management.openmbean.TabularType;
 
 import com.google.common.base.Throwables;
 
 public class SnapshotDetailsTabularData {
 
-    private static final String[] ITEM_NAMES = new String[] { "Snapshot name",
+    private static final String[] ITEM_NAMES = new String[] { "Snapshot name", "Keyspace name", "Column family name",
-            "Keyspace name", "Column family name", "True size", "Size on disk" };
+            "True size", "Size on disk" };
 
-    private static final String[] ITEM_DESCS = new String[] { "snapshot_name",
+    private static final String[] ITEM_DESCS = new String[] { "snapshot_name", "keyspace_name", "columnfamily_name",
-            "keyspace_name", "columnfamily_name", "TrueDiskSpaceUsed",
+            "TrueDiskSpaceUsed", "TotalDiskSpaceUsed" };
-            "TotalDiskSpaceUsed" };
 
     private static final String TYPE_NAME = "SnapshotDetails";
 
@@ -48,28 +54,22 @@ public class SnapshotDetailsTabularData {
 
     static {
         try {
-            ITEM_TYPES = new OpenType[] { SimpleType.STRING, SimpleType.STRING,
+            ITEM_TYPES = new OpenType[] { SimpleType.STRING, SimpleType.STRING, SimpleType.STRING, SimpleType.STRING,
-                    SimpleType.STRING, SimpleType.STRING, SimpleType.STRING };
+                    SimpleType.STRING };
 
-            COMPOSITE_TYPE = new CompositeType(TYPE_NAME, ROW_DESC, ITEM_NAMES,
+            COMPOSITE_TYPE = new CompositeType(TYPE_NAME, ROW_DESC, ITEM_NAMES, ITEM_DESCS, ITEM_TYPES);
-                    ITEM_DESCS, ITEM_TYPES);
 
-            TABULAR_TYPE = new TabularType(TYPE_NAME, ROW_DESC, COMPOSITE_TYPE,
+            TABULAR_TYPE = new TabularType(TYPE_NAME, ROW_DESC, COMPOSITE_TYPE, ITEM_NAMES);
-                    ITEM_NAMES);
         } catch (OpenDataException e) {
             throw Throwables.propagate(e);
         }
     }
 
-    public static void from(final String snapshot, final String ks,
+    public static void from(final String snapshot, final String ks, final String cf,
-            final String cf,
+            Map.Entry<String, Pair<Long, Long>> snapshotDetail, TabularDataSupport result) {
-            Map.Entry<String, Pair<Long, Long>> snapshotDetail,
-            TabularDataSupport result) {
         try {
-            final String totalSize = FileUtils.stringifyFileSize(snapshotDetail
+            final String totalSize = FileUtils.stringifyFileSize(snapshotDetail.getValue().left);
-                    .getValue().left);
+            final String liveSize = FileUtils.stringifyFileSize(snapshotDetail.getValue().right);
-            final String liveSize = FileUtils.stringifyFileSize(snapshotDetail
-                    .getValue().right);
             result.put(new CompositeDataSupport(COMPOSITE_TYPE, ITEM_NAMES,
                     new Object[] { snapshot, ks, cf, liveSize, totalSize }));
         } catch (OpenDataException e) {
@@ -77,8 +77,8 @@ public class SnapshotDetailsTabularData {
         }
     }
 
-    public static void from(final String snapshot, final String ks,
+    public static void from(final String snapshot, final String ks, final String cf, long total, long live,
-            final String cf, long total, long live, TabularDataSupport result) {
+            TabularDataSupport result) {
         try {
             final String totalSize = FileUtils.stringifyFileSize(total);
             final String liveSize = FileUtils.stringifyFileSize(live);

scylla-apiclient/src/main/java/module-info.java

@@ -0,0 +1,15 @@
+module scylla.apiclient {
+	exports com.scylladb.jmx.api;
+	exports com.scylladb.jmx.api.utils;
+	requires org.eclipse.parsson;
+	requires jakarta.ws.rs;
+	requires com.fasterxml.jackson.jakarta.rs.json;
+	requires jersey.client;
+	requires java.logging;
+	requires jakarta.json;
+	requires java.management;
+	requires org.yaml.snakeyaml;
+	requires com.google.common;
+	requires jersey.common;
+	requires jersey.hk2;
+}

scylla-jmx-parent/pom.xml

@@ -0,0 +1,29 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>it.cavallium.scylladb.jmx</groupId>
+  <artifactId>scylla-jmx-parent</artifactId>
+  <version>1.1</version>
+  <packaging>pom</packaging>
+
+  <modules>
+    <module>../</module>
+    <module>../scylla-apiclient</module>
+  </modules>
+
+  <name>Scylla JMX Parent</name>
+
+  <distributionManagement>
+    <repository>
+      <id>mchv-release-distribution</id>
+      <name>MCHV Release Apache Maven Packages Distribution</name>
+      <url>https://mvn.mchv.eu/repository/mchv</url>
+    </repository>
+    <snapshotRepository>
+      <id>mchv-snapshot-distribution</id>
+      <name>MCHV Snapshot Apache Maven Packages Distribution</name>
+      <url>https://mvn.mchv.eu/repository/mchv-snapshot</url>
+    </snapshotRepository>
+  </distributionManagement>
+</project>

src/main/java/com/scylladb/jmx/main/Main.java

@@ -3,40 +3,75 @@
  */
 package com.scylladb.jmx.main;
 
-import com.scylladb.jmx.api.APIConfig;
+import static java.lang.management.ManagementFactory.getPlatformMBeanServer;
+import static java.util.Arrays.asList;
+
+import java.lang.reflect.Constructor;
+
+import javax.management.MBeanServer;
 
-import org.apache.cassandra.db.ColumnFamilyStore;
 import org.apache.cassandra.db.commitlog.CommitLog;
 import org.apache.cassandra.db.compaction.CompactionManager;
-import org.apache.cassandra.gms.Gossiper;
 import org.apache.cassandra.gms.FailureDetector;
+import org.apache.cassandra.gms.Gossiper;
 import org.apache.cassandra.locator.EndpointSnitchInfo;
-import org.apache.cassandra.metrics.StreamingMetrics;
 import org.apache.cassandra.net.MessagingService;
 import org.apache.cassandra.service.CacheService;
 import org.apache.cassandra.service.GCInspector;
 import org.apache.cassandra.service.StorageProxy;
 import org.apache.cassandra.service.StorageService;
+import org.apache.cassandra.streaming.StreamManager;
+
+import com.scylladb.jmx.api.APIClient;
+import com.scylladb.jmx.api.APIConfig;
+import com.scylladb.jmx.metrics.APIMBean;
 
 public class Main {
 
+    private static APIConfig config;
+    private static APIClient client;
+
+    public static synchronized APIConfig getApiConfig() {
+        if (config == null) {
+            config = new APIConfig();
+        }
+        return config;
+    }
+
+    public static synchronized APIClient getApiClient() {
+        if (client == null) {
+            client = new APIClient(getApiConfig());
+        }
+        return client;
+    }
+
     public static void main(String[] args) throws Exception {
-        APIConfig.setConfig();
+        System.out.printf("Java %s%n", System.getProperty("java.version"));
-        System.out.println("Connecting to " + APIConfig.getBaseUrl());
+        System.out.printf("Connecting to %s%n", getApiConfig().getBaseUrl());
         System.out.println("Starting the JMX server");
-        StorageService.getInstance();
+
-        StorageProxy.getInstance();
+        MBeanServer server = getPlatformMBeanServer();
-        MessagingService.getInstance();
+        for (Class<? extends APIMBean> clazz : asList(StorageService.class, StorageProxy.class, MessagingService.class,
-        CommitLog.getInstance();
+                CommitLog.class, Gossiper.class, EndpointSnitchInfo.class, FailureDetector.class, CacheService.class,
-        Gossiper.getInstance();
+                CompactionManager.class, GCInspector.class, StreamManager.class)) {
-        EndpointSnitchInfo.getInstance();
+            Constructor<? extends APIMBean> c = clazz.getDeclaredConstructor(APIClient.class);
-        FailureDetector.getInstance();
+            APIMBean m = c.newInstance(getApiClient());
-        ColumnFamilyStore.register_mbeans();
+            server.registerMBean(m, null);
-        CacheService.getInstance();
+        }
-        CompactionManager.getInstance();
+
-        GCInspector.register();
+        try {
-        StreamingMetrics.register_mbeans();
+            // forces check for dynamically created mbeans
-        Thread.sleep(Long.MAX_VALUE);
+            server.queryNames(null, null);
+        } catch (IllegalStateException e) {
+            // ignore this. Just means we started before scylla.
+        }
+
+        String jmxPort = System.getProperty("com.sun.management.jmxremote.port");
+        System.out.println("JMX is enabled to receive remote connections on port: " + jmxPort);
+
+        for (;;) {
+            Thread.sleep(Long.MAX_VALUE);
+        }
     }
 
 }

src/main/java/com/scylladb/jmx/metrics/APIMBean.java

@@ -0,0 +1,195 @@
+package com.scylladb.jmx.metrics;
+
+import java.lang.reflect.Field;
+import java.util.EnumSet;
+import java.util.Set;
+import java.util.function.Function;
+import java.util.function.Predicate;
+
+import javax.management.BadAttributeValueExpException;
+import javax.management.BadBinaryOpValueExpException;
+import javax.management.BadStringOperationException;
+import javax.management.InstanceAlreadyExistsException;
+import javax.management.InstanceNotFoundException;
+import javax.management.InvalidApplicationException;
+import javax.management.MBeanRegistration;
+import javax.management.MBeanRegistrationException;
+import javax.management.MBeanServer;
+import javax.management.MalformedObjectNameException;
+import javax.management.NotCompliantMBeanException;
+import javax.management.ObjectName;
+import javax.management.QueryExp;
+
+import com.scylladb.jmx.api.APIClient;
+import com.sun.jmx.mbeanserver.JmxMBeanServer;
+
+/**
+ * Base type for MBeans in scylla-jmx. Wraps auto naming and {@link APIClient}
+ * holding.
+ * 
+ * @author calle
+ *
+ */
+public class APIMBean implements MBeanRegistration {
+    protected final APIClient client;
+    protected final String mbeanName;
+
+    public APIMBean(APIClient client) {
+        this(null, client);
+    }
+
+    public APIMBean(String mbeanName, APIClient client) {
+        this.mbeanName = mbeanName;
+        this.client = client;
+    }
+
+    /**
+     * Helper method to add/remove dynamically created MBeans from a server
+     * instance.
+     * 
+     * @param server
+     *            The {@link MBeanServer} to check
+     * @param all
+     *            All {@link ObjectName}s that should be bound
+     * @param predicate
+     *            {@link QueryExp} predicate to filter relevant object names.
+     * @param generator
+     *            {@link Function} to create a new MBean instance for a given
+     *            {@link ObjectName}
+     * @return
+     * @throws MalformedObjectNameException
+     */
+	public static boolean checkRegistration(JmxMBeanServer server, Set<ObjectName> all,
+			EnumSet<RegistrationMode> mode, final Predicate<ObjectName> predicate,
+			Function<ObjectName, Object> generator) throws MalformedObjectNameException {
+		Set<ObjectName> registered = queryNames(server, predicate);
+		if (mode.contains(RegistrationMode.Remove)) {
+			for (ObjectName name : registered) {
+				if (!all.contains(name)) {
+					try {
+						server.getMBeanServerInterceptor().unregisterMBean(name);
+					} catch (MBeanRegistrationException | InstanceNotFoundException e) {
+					}
+				}
+			}
+		}
+
+		int added = 0;
+		if (mode.contains(RegistrationMode.Add)) {
+			for (ObjectName name : all) {
+				if (!registered.contains(name)) {
+					try {
+						server.getMBeanServerInterceptor().registerMBean(generator.apply(name), name);
+						added++;
+					} catch (InstanceAlreadyExistsException | MBeanRegistrationException
+							| NotCompliantMBeanException e) {
+					}
+				}
+			}
+		}
+		return added > 0;
+	}
+
+    /**
+     * Helper method to query {@link ObjectName}s from an {@link MBeanServer}
+     * based on {@link Predicate}
+     * 
+     * @param server
+     * @param predicate
+     * @return
+     */
+    public static Set<ObjectName> queryNames(JmxMBeanServer server, final Predicate<ObjectName> predicate) {
+        @SuppressWarnings("serial")
+        Set<ObjectName> registered = server.queryNames(null, new QueryExp() {
+            @Override
+            public void setMBeanServer(MBeanServer s) {
+            }
+
+            @Override
+            public boolean apply(ObjectName name) throws BadStringOperationException, BadBinaryOpValueExpException,
+                    BadAttributeValueExpException, InvalidApplicationException {
+                return predicate.test(name);
+            }
+        });
+        return registered;
+    }
+
+    JmxMBeanServer server;
+    ObjectName name;
+
+    protected final ObjectName getBoundName() {
+        return name;
+    }
+
+    /**
+     * Figure out an {@link ObjectName} for this object based on either
+     * contructor parameter, static field, or just package/class name.
+     * 
+     * @return
+     * @throws MalformedObjectNameException
+     */
+    protected ObjectName generateName() throws MalformedObjectNameException {
+        String mbeanName = this.mbeanName;
+        if (mbeanName == null) {
+            Field f;
+            try {
+                f = getClass().getDeclaredField("MBEAN_NAME");
+                f.setAccessible(true);
+                mbeanName = (String) f.get(null);
+            } catch (Throwable t) {
+            }
+        }
+        if (mbeanName == null) {
+            for (Class<?> c : getClass().getInterfaces()) {
+                Field f;
+                try {
+                    f = c.getDeclaredField("OBJECT_NAME");
+                    f.setAccessible(true);
+                    mbeanName = (String) f.get(null);
+                    break;
+                } catch (Throwable t) {
+                }                
+            }
+        }
+        if (mbeanName == null) {
+            String name = getClass().getName();
+            int i = name.lastIndexOf('.');
+            mbeanName = name.substring(0, i) + ":type=" + name.substring(i + 1);
+        }
+        return new ObjectName(mbeanName);
+    }
+
+    /**
+     * Keeps track of bound server and optionally generates an
+     * {@link ObjectName} for this instance.
+     */
+    @Override
+    public ObjectName preRegister(MBeanServer server, ObjectName name) throws Exception {
+        if (this.server != null) {
+            throw new IllegalStateException("Can only exist in a single MBeanServer");
+        }
+        this.server = (JmxMBeanServer) server;
+        if (name == null) {
+            name = generateName();
+        }
+        this.name = name;
+
+        return name;
+    }
+
+    @Override
+    public void postRegister(Boolean registrationDone) {
+    }
+
+    @Override
+    public void preDeregister() throws Exception {
+    }
+
+    @Override
+    public void postDeregister() {
+        assert server != null;
+        assert name != null;
+        this.server = null;
+        this.name = null;
+    }
+}

src/main/java/com/scylladb/jmx/metrics/APIMetrics.java

@@ -1,415 +0,0 @@
-package com.scylladb.jmx.metrics;
-
-/*
- * Copyright 2015 Cloudius Systems
- *
- * Modified by Cloudius Systems
- */
-
-import java.util.concurrent.TimeUnit;
-
-import com.yammer.metrics.core.APIMetricsRegistry;
-import com.yammer.metrics.core.Counter;
-import com.yammer.metrics.core.Gauge;
-import com.yammer.metrics.core.Histogram;
-import com.yammer.metrics.core.Meter;
-import com.yammer.metrics.core.MetricName;
-import com.yammer.metrics.core.Timer;
-import com.yammer.metrics.reporting.JmxReporter;
-
-public class APIMetrics {
-    private static final APIMetricsRegistry DEFAULT_REGISTRY = new APIMetricsRegistry();
-    private static final Thread SHUTDOWN_HOOK = new Thread() {
-        public void run() {
-            JmxReporter.shutdownDefault();
-        }
-    };
-
-    static {
-        JmxReporter.startDefault(DEFAULT_REGISTRY);
-        Runtime.getRuntime().addShutdownHook(SHUTDOWN_HOOK);
-    }
-
-    private APIMetrics() { /* unused */
-    }
-
-    /**
-     * Given a new {@link com.yammer.metrics.core.Gauge}, registers it under the
-     * given class and name.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param metric
-     *            the metric
-     * @param <T>
-     *            the type of the value returned by the metric
-     * @return {@code metric}
-     */
-    public static <T> Gauge<T> newGauge(Class<?> klass, String name,
-            Gauge<T> metric) {
-        return DEFAULT_REGISTRY.newGauge(klass, name, metric);
-    }
-
-    /**
-     * Given a new {@link com.yammer.metrics.core.Gauge}, registers it under the
-     * given class and name.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param scope
-     *            the scope of the metric
-     * @param metric
-     *            the metric
-     * @param <T>
-     *            the type of the value returned by the metric
-     * @return {@code metric}
-     */
-    public static <T> Gauge<T> newGauge(Class<?> klass, String name,
-            String scope, Gauge<T> metric) {
-        return DEFAULT_REGISTRY.newGauge(klass, name, scope, metric);
-    }
-
-    /**
-     * Given a new {@link com.yammer.metrics.core.Gauge}, registers it under the
-     * given metric name.
-     *
-     * @param metricName
-     *            the name of the metric
-     * @param metric
-     *            the metric
-     * @param <T>
-     *            the type of the value returned by the metric
-     * @return {@code metric}
-     */
-    public static <T> Gauge<T> newGauge(MetricName metricName, Gauge<T> metric) {
-        return DEFAULT_REGISTRY.newGauge(metricName, metric);
-    }
-
-    /**
-     * Creates a new {@link com.yammer.metrics.core.Counter} and registers it
-     * under the given class and name.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @return a new {@link com.yammer.metrics.core.Counter}
-     */
-    public static Counter newCounter(String url, Class<?> klass, String name) {
-        return DEFAULT_REGISTRY.newCounter(url, klass, name);
-    }
-
-    /**
-     * Creates a new {@link com.yammer.metrics.core.Counter} and registers it
-     * under the given class and name.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param scope
-     *            the scope of the metric
-     * @return a new {@link com.yammer.metrics.core.Counter}
-     */
-    public static Counter newCounter(String url, Class<?> klass, String name,
-            String scope) {
-        return DEFAULT_REGISTRY.newCounter(url, klass, name, scope);
-    }
-
-    /**
-     * Creates a new {@link com.yammer.metrics.core.Counter} and registers it
-     * under the given metric name.
-     *
-     * @param metricName
-     *            the name of the metric
-     * @return a new {@link com.yammer.metrics.core.Counter}
-     */
-    public static Counter newCounter(String url, MetricName metricName) {
-        return DEFAULT_REGISTRY.newCounter(url, metricName);
-    }
-
-    /**
-     * Creates a new {@link com.yammer.metrics.core.Histogram} and registers it
-     * under the given class and name.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param biased
-     *            whether or not the histogram should be biased
-     * @return a new {@link com.yammer.metrics.core.Histogram}
-     */
-    public static Histogram newHistogram(String url, Class<?> klass,
-            String name, boolean biased) {
-        return DEFAULT_REGISTRY.newHistogram(url, klass, name, biased);
-    }
-
-    /**
-     * Creates a new {@link com.yammer.metrics.core.Histogram} and registers it
-     * under the given class, name, and scope.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param scope
-     *            the scope of the metric
-     * @param biased
-     *            whether or not the histogram should be biased
-     * @return a new {@link com.yammer.metrics.core.Histogram}
-     */
-    public static Histogram newHistogram(String url, Class<?> klass,
-            String name, String scope, boolean biased) {
-        return DEFAULT_REGISTRY.newHistogram(url, klass, name, scope, biased);
-    }
-
-    /**
-     * Creates a new {@link com.yammer.metrics.core.Histogram} and registers it
-     * under the given metric name.
-     *
-     * @param metricName
-     *            the name of the metric
-     * @param biased
-     *            whether or not the histogram should be biased
-     * @return a new {@link com.yammer.metrics.core.Histogram}
-     */
-    public static Histogram newHistogram(String url, MetricName metricName,
-            boolean biased) {
-        return DEFAULT_REGISTRY.newHistogram(url, metricName, biased);
-    }
-
-    /**
-     * Creates a new non-biased {@link com.yammer.metrics.core.Histogram} and
-     * registers it under the given class and name.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @return a new {@link com.yammer.metrics.core.Histogram}
-     */
-    public static Histogram newHistogram(String url, Class<?> klass, String name) {
-        return DEFAULT_REGISTRY.newHistogram(url, klass, name);
-    }
-
-    /**
-     * Creates a new non-biased {@link com.yammer.metrics.core.Histogram} and
-     * registers it under the given class, name, and scope.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param scope
-     *            the scope of the metric
-     * @return a new {@link com.yammer.metrics.core.Histogram}
-     */
-    public static Histogram newHistogram(String url, Class<?> klass,
-            String name, String scope) {
-        return DEFAULT_REGISTRY.newHistogram(url, klass, name, scope);
-    }
-
-    /**
-     * Creates a new non-biased {@link com.yammer.metrics.core.Histogram} and
-     * registers it under the given metric name.
-     *
-     * @param metricName
-     *            the name of the metric
-     * @return a new {@link com.yammer.metrics.core.Histogram}
-     */
-    public static Histogram newHistogram(String url, MetricName metricName) {
-        return newHistogram(url, metricName, false);
-    }
-
-    /**
-     * Creates a new {@link com.yammer.metrics.core.Meter} and registers it
-     * under the given class and name.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param eventType
-     *            the plural name of the type of events the meter is measuring
-     *            (e.g., {@code "requests"})
-     * @param unit
-     *            the rate unit of the new meter
-     * @return a new {@link com.yammer.metrics.core.Meter}
-     */
-    public static Meter newMeter(String url, Class<?> klass, String name,
-            String eventType, TimeUnit unit) {
-        return DEFAULT_REGISTRY.newMeter(url, klass, name, eventType, unit);
-    }
-
-    /**
-     * Creates a new {@link com.yammer.metrics.core.Meter} and registers it
-     * under the given class, name, and scope.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param scope
-     *            the scope of the metric
-     * @param eventType
-     *            the plural name of the type of events the meter is measuring
-     *            (e.g., {@code "requests"})
-     * @param unit
-     *            the rate unit of the new meter
-     * @return a new {@link com.yammer.metrics.core.Meter}
-     */
-    public static Meter newMeter(String url, Class<?> klass, String name,
-            String scope, String eventType, TimeUnit unit) {
-        return DEFAULT_REGISTRY.newMeter(url, klass, name, scope, eventType,
-                unit);
-    }
-
-    /**
-     * Creates a new {@link com.yammer.metrics.core.Meter} and registers it
-     * under the given metric name.
-     *
-     * @param metricName
-     *            the name of the metric
-     * @param eventType
-     *            the plural name of the type of events the meter is measuring
-     *            (e.g., {@code "requests"})
-     * @param unit
-     *            the rate unit of the new meter
-     * @return a new {@link com.yammer.metrics.core.Meter}
-     */
-    public static Meter newMeter(String url, MetricName metricName,
-            String eventType, TimeUnit unit) {
-        return DEFAULT_REGISTRY.newMeter(url, metricName, eventType, unit);
-    }
-
-    /**
-     * Creates a new {@link com.yammer.metrics.core.Meter} and registers it
-     * under the given metric name.
-     *
-     * @param metricName
-     *            the name of the metric
-     * @param eventType
-     *            the plural name of the type of events the meter is measuring
-     *            (e.g., {@code "requests"})
-     * @param unit
-     *            the rate unit of the new meter
-     * @return a new {@link com.yammer.metrics.core.Meter}
-     */
-    public static Meter newSettableMeter(MetricName metricName,
-            String eventType, TimeUnit unit) {
-        return DEFAULT_REGISTRY.newSettableMeter(metricName, eventType, unit);
-    }
-    /**
-     * Creates a new {@link com.yammer.metrics.core.APITimer} and registers it
-     * under the given class and name.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param durationUnit
-     *            the duration scale unit of the new timer
-     * @param rateUnit
-     *            the rate scale unit of the new timer
-     * @return a new {@link com.yammer.metrics.core.APITimer}
-     */
-    public static Timer newTimer(String url, Class<?> klass, String name,
-            TimeUnit durationUnit, TimeUnit rateUnit) {
-        return DEFAULT_REGISTRY.newTimer(url, klass, name, durationUnit, rateUnit);
-    }
-
-    /**
-     * Creates a new {@link com.yammer.metrics.core.APITimer} and registers it
-     * under the given class and name, measuring elapsed time in milliseconds
-     * and invocations per second.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @return a new {@link com.yammer.metrics.core.APITimer}
-     */
-    public static Timer newTimer(String url, Class<?> klass, String name) {
-        return DEFAULT_REGISTRY.newTimer(url, klass, name);
-    }
-
-    /**
-     * Creates a new {@link com.yammer.metrics.core.APITimer} and registers it
-     * under the given class, name, and scope.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param scope
-     *            the scope of the metric
-     * @param durationUnit
-     *            the duration scale unit of the new timer
-     * @param rateUnit
-     *            the rate scale unit of the new timer
-     * @return a new {@link com.yammer.metrics.core.APITimer}
-     */
-    public static Timer newTimer(String url, Class<?> klass, String name, String scope,
-            TimeUnit durationUnit, TimeUnit rateUnit) {
-        return DEFAULT_REGISTRY.newTimer(url, klass, name, scope, durationUnit,
-                rateUnit);
-    }
-
-    /**
-     * Creates a new {@link com.yammer.metrics.core.APITimer} and registers it
-     * under the given class, name, and scope, measuring elapsed time in
-     * milliseconds and invocations per second.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param scope
-     *            the scope of the metric
-     * @return a new {@link com.yammer.metrics.core.APITimer}
-     */
-    public static Timer newTimer(String url, Class<?> klass, String name, String scope) {
-        return DEFAULT_REGISTRY.newTimer(url, klass, name, scope);
-    }
-
-    /**
-     * Creates a new {@link com.yammer.metrics.core.APITimer} and registers it
-     * under the given metric name.
-     *
-     * @param metricName
-     *            the name of the metric
-     * @param durationUnit
-     *            the duration scale unit of the new timer
-     * @param rateUnit
-     *            the rate scale unit of the new timer
-     * @return a new {@link com.yammer.metrics.core.APITimer}
-     */
-    public static Timer newTimer(String url, MetricName metricName, TimeUnit durationUnit,
-            TimeUnit rateUnit) {
-        return DEFAULT_REGISTRY.newTimer(url, metricName, durationUnit, rateUnit);
-    }
-
-    /**
-     * Returns the (static) default registry.
-     *
-     * @return the metrics registry
-     */
-    public static APIMetricsRegistry defaultRegistry() {
-        return DEFAULT_REGISTRY;
-    }
-
-    /**
-     * Shuts down all thread pools for the default registry.
-     */
-    public static void shutdown() {
-        DEFAULT_REGISTRY.shutdown();
-        JmxReporter.shutdownDefault();
-        Runtime.getRuntime().removeShutdownHook(SHUTDOWN_HOOK);
-    }
-
-}

src/main/java/com/scylladb/jmx/metrics/MetricsMBean.java

@@ -0,0 +1,137 @@
+package com.scylladb.jmx.metrics;
+
+import static java.util.Arrays.asList;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Predicate;
+import java.util.function.Supplier;
+
+import javax.management.InstanceNotFoundException;
+import javax.management.MBeanRegistrationException;
+import javax.management.MBeanServer;
+import javax.management.MalformedObjectNameException;
+import javax.management.ObjectName;
+
+import org.apache.cassandra.metrics.Metrics;
+import org.apache.cassandra.metrics.MetricsRegistry;
+
+import com.scylladb.jmx.api.APIClient;
+import com.sun.jmx.mbeanserver.JmxMBeanServer;
+
+/**
+ * Base type for MBeans containing {@link Metrics}. 
+ * 
+ * @author calle
+ *
+ */
+public abstract class MetricsMBean extends APIMBean {
+    private static final Map<JmxMBeanServer, Map<String, Integer>> registered = new HashMap<>();
+    private static final Object registrationLock = new Object();
+
+    private final Collection<Metrics> metrics;
+
+    public MetricsMBean(APIClient client, Metrics... metrics) {
+        this(null, client, metrics);
+    }
+
+    public MetricsMBean(String mbeanName, APIClient client, Metrics... metrics) {
+        this(mbeanName, client, asList(metrics));
+    }
+
+    public MetricsMBean(String mbeanName, APIClient client, Collection<Metrics> metrics) {
+        super(mbeanName, client);
+        this.metrics = metrics;
+    }
+
+    protected Predicate<ObjectName> getTypePredicate() {
+        String domain = name.getDomain();
+        String type = name.getKeyProperty("type");
+        return n -> {
+            return domain.equals(n.getDomain()) && type.equals(n.getKeyProperty("type"));
+        };
+    }
+
+    // Has to be called with registrationLock hold
+    private static boolean shouldRegisterGlobals(JmxMBeanServer server, String domainAndType, boolean reversed) {
+        Map<String, Integer> serverMap = registered.get(server);
+        if (serverMap == null) {
+            assert !reversed;
+            serverMap = new HashMap<>();
+            serverMap.put(domainAndType, 1);
+            registered.put(server, serverMap);
+            return true;
+        }
+        Integer count = serverMap.get(domainAndType);
+        if (count == null) {
+            assert !reversed;
+            serverMap.put(domainAndType, 1);
+            return true;
+        }
+        if (reversed) {
+            --count;
+            if (count == 0) {
+                serverMap.remove(domainAndType);
+                if (serverMap.isEmpty()) {
+                    registered.remove(server);
+                }
+                return true;
+            }
+            serverMap.put(domainAndType, count);
+            return false;
+        } else {
+            serverMap.put(domainAndType, count + 1);
+        }
+        return false;
+    }
+
+    private void register(MetricsRegistry registry, JmxMBeanServer server, boolean reversed) throws MalformedObjectNameException {
+        // Check if we're the first/last of our type bound/removed. 
+        synchronized (registrationLock) {
+            boolean registerGlobals = shouldRegisterGlobals(server, name.getDomain() + ":" + name.getKeyProperty("type"), reversed);
+            if (registerGlobals) {
+                for (Metrics m : metrics) {
+                    m.registerGlobals(registry);
+                }
+            }
+        }
+        for (Metrics m : metrics) {
+            m.register(registry);
+        }
+    }
+
+    @Override
+    public ObjectName preRegister(MBeanServer server, ObjectName name) throws Exception {
+        // Get name etc. 
+        name = super.preRegister(server, name);
+        // Register all metrics in server
+        register(new MetricsRegistry(client, (JmxMBeanServer) server), (JmxMBeanServer) server, false);
+        return name;
+    }
+
+    @Override
+    public void postDeregister() {
+        // We're officially unbound. Remove all metrics we added.
+        try {
+            register(new MetricsRegistry(client, server) {
+                // Unbind instead of bind. Yes.
+                @Override
+                public void register(Supplier<MetricMBean> s, ObjectName... objectNames) {
+                    for (ObjectName name : objectNames) {
+                        try {
+                            server.getMBeanServerInterceptor().unregisterMBean(name);
+                        } catch (MBeanRegistrationException | InstanceNotFoundException e) {
+                        }
+                    }
+                }
+            }, server, true);
+        } catch (MalformedObjectNameException e) {
+            // TODO : log?
+        }
+        super.postDeregister();
+    }
+}

src/main/java/com/scylladb/jmx/metrics/RegistrationChecker.java

@@ -0,0 +1,69 @@
+package com.scylladb.jmx.metrics;
+
+import static com.scylladb.jmx.metrics.RegistrationMode.Remove;
+import static com.scylladb.jmx.metrics.RegistrationMode.Wait;
+import static java.util.EnumSet.allOf;
+import static java.util.EnumSet.of;
+
+import java.net.UnknownHostException;
+import java.util.EnumSet;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+
+import javax.management.OperationsException;
+
+import com.scylladb.jmx.api.APIClient;
+import com.sun.jmx.mbeanserver.JmxMBeanServer;
+
+/**
+ * Helper type to do optional locking for registration. Allows for
+ * per-bind-point locks and registration, instead of per-type or per-instance
+ * locks which may be misguiding, since for example one instance can be bound to
+ * many MBeanServers etc.
+ * 
+ * Also allows for polled checks, i.e. try-lock and either wait or skip. Wait,
+ * because we probably should not repeat things hidden by this type too often,
+ * and skip because for example a periodic task checking can just skip if a
+ * user-initiated registration check is being done.
+ * 
+ * @author calle
+ *
+ */
+@SuppressWarnings("restriction")
+public abstract class RegistrationChecker {
+    private final Lock lock = new ReentrantLock();
+
+    public static final EnumSet<RegistrationMode> REMOVE_NO_WAIT = of(Remove);
+    public static final EnumSet<RegistrationMode> ADD_AND_REMOVE = allOf(RegistrationMode.class);
+
+    public final void reap(APIClient client, JmxMBeanServer server) throws OperationsException, UnknownHostException {
+        check(client, server, REMOVE_NO_WAIT);
+    }
+
+    public final void check(APIClient client, JmxMBeanServer server) throws OperationsException, UnknownHostException {
+        check(client, server, ADD_AND_REMOVE);
+    }
+
+    public final void check(APIClient client, JmxMBeanServer server, EnumSet<RegistrationMode> mode)
+            throws OperationsException, UnknownHostException {
+        if (!lock.tryLock()) {
+            if (mode.contains(Wait)) {
+                // someone is doing update.
+                // since this is jmx, and sloppy, we'll just
+                // assume that once he is done, things are
+                // good enough.
+                lock.lock();
+                lock.unlock();
+            }
+            return;
+        }
+        try {
+            doCheck(client, server, mode);
+        } finally {
+            lock.unlock();
+        }
+    }
+
+    protected abstract void doCheck(APIClient client, JmxMBeanServer server, EnumSet<RegistrationMode> mode)
+            throws OperationsException, UnknownHostException;
+}

src/main/java/com/scylladb/jmx/metrics/RegistrationMode.java

@@ -0,0 +1,5 @@
+package com.scylladb.jmx.metrics;
+
+public enum RegistrationMode {
+	Wait, Add, Remove,
+}

src/main/java/com/scylladb/jmx/utils/APIBuilder.java

@@ -0,0 +1,496 @@
+package com.scylladb.jmx.utils;
+/**
+ * Copyright 2016 ScyllaDB
+ */
+
+import static com.scylladb.jmx.main.Main.getApiClient;
+import static com.sun.jmx.mbeanserver.Util.wildmatch;
+import static java.util.logging.Level.SEVERE;
+import static javax.management.MBeanServerDelegate.DELEGATE_NAME;
+
+import java.security.AccessController;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+import java.util.logging.Logger;
+
+/*
+* This file is part of Scylla.
+*
+* Scylla is free software: you can redistribute it and/or modify
+* it under the terms of the GNU Affero General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* Scylla is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with Scylla.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+import javax.management.DynamicMBean;
+import javax.management.InstanceAlreadyExistsException;
+import javax.management.InstanceNotFoundException;
+import javax.management.MBeanServer;
+import javax.management.MBeanServerBuilder;
+import javax.management.MBeanServerDelegate;
+import javax.management.MalformedObjectNameException;
+import javax.management.ObjectName;
+import javax.management.QueryExp;
+import javax.management.RuntimeOperationsException;
+
+import com.sun.jmx.interceptor.DefaultMBeanServerInterceptor;
+import com.sun.jmx.mbeanserver.JmxMBeanServer;
+import com.sun.jmx.mbeanserver.NamedObject;
+import com.sun.jmx.mbeanserver.Repository;
+
+/**
+ * This class purposly knows way to much of the inner workings
+ * of Oracle JDK MBeanServer workings, and pervert it for 
+ * performance sakes. It is not portable to other MBean implementations. 
+ *
+ */
+@SuppressWarnings("restriction")
+public class APIBuilder extends MBeanServerBuilder {
+
+    private static final Logger logger = Logger.getLogger(APIBuilder.class.getName());
+
+    private static class TableRepository extends Repository {
+        private static final Logger logger = Logger.getLogger(TableRepository.class.getName());
+
+        private final Repository wrapped;
+
+        private final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
+
+        private final Map<TableMetricParams, DynamicMBean> tableMBeans = new HashMap<>();
+
+        private static boolean isTableMetricName(ObjectName name) {
+            return isTableMetricDomain(name.getDomain());
+        }
+
+        private static boolean isTableMetricDomain(String domain) {
+            return TableMetricParams.TABLE_METRICS_DOMAIN.equals(domain);
+        }
+
+        public TableRepository(String defaultDomain, final Repository repository) {
+            super(defaultDomain);
+            wrapped = repository;
+        }
+
+        @Override
+        public String getDefaultDomain() {
+            return wrapped.getDefaultDomain();
+        }
+
+        @Override
+        public boolean contains(final ObjectName name) {
+            if (!isTableMetricName(name)) {
+                return wrapped.contains(name);
+            } else {
+                lock.readLock().lock();
+                try {
+                    return tableMBeans.containsKey(new TableMetricParams(name));
+                } finally {
+                    lock.readLock().unlock();
+                }
+            }
+        }
+
+        @Override
+        public String[] getDomains() {
+            final String[] domains = wrapped.getDomains();
+            if (tableMBeans.isEmpty()) {
+                return domains;
+            }
+            final String[] res = new String[domains.length + 1];
+            System.arraycopy(domains, 0, res, 0, domains.length);
+            res[domains.length] = TableMetricParams.TABLE_METRICS_DOMAIN;
+            return res;
+        }
+
+        @Override
+        public Integer getCount() {
+            lock.readLock().lock();
+            try {
+                return wrapped.getCount() + tableMBeans.size();
+            } finally {
+                lock.readLock().unlock();
+            }
+        }
+
+        @Override
+        public void addMBean(final DynamicMBean bean, final ObjectName name, final RegistrationContext ctx)
+                throws InstanceAlreadyExistsException {
+            if (!isTableMetricName(name)) {
+                wrapped.addMBean(bean, name, ctx);
+            } else {
+                final TableMetricParams key = new TableMetricParams(name);
+                lock.writeLock().lock();
+                try {
+                    if (tableMBeans.containsKey(key)) {
+                        throw new InstanceAlreadyExistsException(name.toString());
+                    }
+                    tableMBeans.put(key, bean);
+                    if (ctx == null) return;
+                    try {
+                        ctx.registering();
+                    } catch (RuntimeOperationsException x) {
+                        throw x;
+                    } catch (RuntimeException x) {
+                        throw new RuntimeOperationsException(x);
+                    }
+                } finally {
+                    lock.writeLock().unlock();
+                }
+            }
+        }
+
+        @Override
+        public void remove(final ObjectName name, final RegistrationContext ctx) throws InstanceNotFoundException {
+            if (!isTableMetricName(name)) {
+                wrapped.remove(name, ctx);
+            } else {
+                final TableMetricParams key = new TableMetricParams(name);
+                lock.writeLock().lock();
+                try {
+                    if (tableMBeans.remove(key) == null) {
+                        throw new InstanceNotFoundException(name.toString());
+                    }
+
+                    if (ctx == null) {
+                        return;
+                    }
+                    try {
+                        ctx.unregistered();
+                    } catch (Exception x) {
+                        logger.log(SEVERE, "Unexpected error.", x);
+                    }
+                } finally {
+                    lock.writeLock().unlock();
+                }
+            }
+        }
+
+        @Override
+        public DynamicMBean retrieve(final ObjectName name) {
+            if (!isTableMetricName(name)) {
+                return wrapped.retrieve(name);
+            } else {
+                lock.readLock().lock();
+                try {
+                    return tableMBeans.get(new TableMetricParams(name));
+                } finally {
+                    lock.readLock().unlock();
+                }
+            }
+        }
+
+        private void addAll(final Set<NamedObject> res) {
+            for (Map.Entry<TableMetricParams, DynamicMBean> e : tableMBeans.entrySet()) {
+                try {
+                    res.add(new NamedObject(e.getKey().toName(), e.getValue()));
+                } catch (MalformedObjectNameException e1) {
+                    // This should never happen
+                    logger.log(SEVERE, "Unexpected error.", e1);
+                }
+            }
+        }
+
+        private void addAllMatching(final Set<NamedObject> res,
+                final ObjectNamePattern pattern) {
+            for (Map.Entry<TableMetricParams, DynamicMBean> e : tableMBeans.entrySet()) {
+                try {
+                    ObjectName name = e.getKey().toName();
+                    if (pattern.matchKeys(name)) {
+                        res.add(new NamedObject(name, e.getValue()));
+                    }
+                } catch (MalformedObjectNameException e1) {
+                    // This should never happen
+                    logger.log(SEVERE, "Unexpected error.", e1);
+                }
+            }
+        }
+
+        @Override
+        public Set<NamedObject> query(final ObjectName pattern, final QueryExp query) {
+            Set<NamedObject> res = wrapped.query(pattern, query);
+            ObjectName name;
+            if (pattern == null ||
+                pattern.getCanonicalName().length() == 0 ||
+                pattern.equals(ObjectName.WILDCARD)) {
+               name = ObjectName.WILDCARD;
+            } else {
+                name = pattern;
+            }
+
+            lock.readLock().lock();
+            try {
+                // If pattern is not a pattern, retrieve this mbean !
+                if (!name.isPattern() && isTableMetricName(name)) {
+                    final DynamicMBean bean = tableMBeans.get(new TableMetricParams(name));
+                    if (bean != null) {
+                        res.add(new NamedObject(name, bean));
+                        return res;
+                    }
+                }
+
+                // All names in all domains
+                if (name == ObjectName.WILDCARD) {
+                    addAll(res);
+                    return res;
+                }
+
+                final String canonical_key_property_list_string =
+                        name.getCanonicalKeyPropertyListString();
+
+                final boolean allNames =
+                        (canonical_key_property_list_string.length()==0);
+                final ObjectNamePattern namePattern =
+                    (allNames?null:new ObjectNamePattern(name));
+
+                // All names in default domain
+                if (name.getDomain().length() == 0) {
+                    if (isTableMetricDomain(getDefaultDomain())) {
+                        if (allNames) {
+                            addAll(res);
+                        } else {
+                            addAllMatching(res, namePattern);
+                        }
+                    }
+                    return res;
+                }
+
+                if (!name.isDomainPattern()) {
+                    if (isTableMetricDomain(getDefaultDomain())) {
+                        if (allNames) {
+                            addAll(res);
+                        } else {
+                            addAllMatching(res, namePattern);
+                        }
+                    }
+                    return res;
+                }
+
+                // Pattern matching in the domain name (*, ?)
+                final String dom2Match = name.getDomain();
+                if (wildmatch(TableMetricParams.TABLE_METRICS_DOMAIN, dom2Match)) {
+                    if (allNames) {
+                        addAll(res);
+                    } else {
+                        addAllMatching(res, namePattern);
+                    }
+                }
+            } finally {
+                lock.readLock().unlock();
+            }
+            return res;
+        }
+    }
+
+    private final static class ObjectNamePattern {
+        private final String[] keys;
+        private final String[] values;
+        private final String   properties;
+        private final boolean  isPropertyListPattern;
+        private final boolean  isPropertyValuePattern;
+
+        /**
+         * The ObjectName pattern against which ObjectNames are matched.
+         **/
+        public final ObjectName pattern;
+
+        /**
+         * Builds a new ObjectNamePattern object from an ObjectName pattern.
+         * @param pattern The ObjectName pattern under examination.
+         **/
+        public ObjectNamePattern(ObjectName pattern) {
+            this(pattern.isPropertyListPattern(),
+                 pattern.isPropertyValuePattern(),
+                 pattern.getCanonicalKeyPropertyListString(),
+                 pattern.getKeyPropertyList(),
+                 pattern);
+        }
+
+        /**
+         * Builds a new ObjectNamePattern object from an ObjectName pattern
+         * constituents.
+         * @param propertyListPattern pattern.isPropertyListPattern().
+         * @param propertyValuePattern pattern.isPropertyValuePattern().
+         * @param canonicalProps pattern.getCanonicalKeyPropertyListString().
+         * @param keyPropertyList pattern.getKeyPropertyList().
+         * @param pattern The ObjectName pattern under examination.
+         **/
+        ObjectNamePattern(boolean propertyListPattern,
+                          boolean propertyValuePattern,
+                          String canonicalProps,
+                          Map<String,String> keyPropertyList,
+                          ObjectName pattern) {
+            this.isPropertyListPattern = propertyListPattern;
+            this.isPropertyValuePattern = propertyValuePattern;
+            this.properties = canonicalProps;
+            final int len = keyPropertyList.size();
+            this.keys   = new String[len];
+            this.values = new String[len];
+            int i = 0;
+            for (Map.Entry<String,String> entry : keyPropertyList.entrySet()) {
+                keys[i]   = entry.getKey();
+                values[i] = entry.getValue();
+                i++;
+            }
+            this.pattern = pattern;
+        }
+
+        /**
+         * Return true if the given ObjectName matches the ObjectName pattern
+         * for which this object has been built.
+         * WARNING: domain name is not considered here because it is supposed
+         *          not to be wildcard when called. PropertyList is also
+         *          supposed not to be zero-length.
+         * @param name The ObjectName we want to match against the pattern.
+         * @return true if <code>name</code> matches the pattern.
+         **/
+        public boolean matchKeys(ObjectName name) {
+            // If key property value pattern but not key property list
+            // pattern, then the number of key properties must be equal
+            //
+            if (isPropertyValuePattern &&
+                !isPropertyListPattern &&
+                (name.getKeyPropertyList().size() != keys.length)) {
+                return false;
+            }
+
+            // If key property value pattern or key property list pattern,
+            // then every property inside pattern should exist in name
+            //
+            if (isPropertyValuePattern || isPropertyListPattern) {
+                for (int i = keys.length - 1; i >= 0 ; i--) {
+                    // Find value in given object name for key at current
+                    // index in receiver
+                    //
+                    String v = name.getKeyProperty(keys[i]);
+                    // Did we find a value for this key ?
+                    //
+                    if (v == null) {
+                        return false;
+                    }
+                    // If this property is ok (same key, same value), go to next
+                    //
+                    if (isPropertyValuePattern &&
+                        pattern.isPropertyValuePattern(keys[i])) {
+                        // wildmatch key property values
+                        // values[i] is the pattern;
+                        // v is the string
+                        if (wildmatch(v,values[i])) {
+                            continue;
+                        } else {
+                            return false;
+                        }
+                    }
+                    if (v.equals(values[i])) {
+                        continue;
+                    }
+                    return false;
+                }
+                return true;
+            }
+
+            // If no pattern, then canonical names must be equal
+            //
+            final String p1 = name.getCanonicalKeyPropertyListString();
+            final String p2 = properties;
+            return (p1.equals(p2));
+        }
+    }
+
+    public static class TableMetricParams {
+        public static final String TABLE_METRICS_DOMAIN = "org.apache.cassandra.metrics";
+
+        private final ObjectName name;
+
+        public TableMetricParams(ObjectName name) {
+            this.name = name;
+        }
+
+        public ObjectName toName() throws MalformedObjectNameException {
+            return name;
+        }
+
+        private static boolean equal(Object a, Object b) {
+            return (a == null) ? b == null : a.equals(b);
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (!(o instanceof TableMetricParams)) {
+                return false;
+            }
+            TableMetricParams oo = (TableMetricParams) o;
+            return equal(name.getKeyProperty("keyspace"), oo.name.getKeyProperty("keyspace"))
+                    && equal(name.getKeyProperty("scope"), oo.name.getKeyProperty("scope"))
+                    && equal(name.getKeyProperty("name"), oo.name.getKeyProperty("name"))
+                    && equal(name.getKeyProperty("type"), oo.name.getKeyProperty("type"));
+        }
+
+        private static int hash(Object o) {
+            return o == null ? 0 : o.hashCode();
+        }
+
+        private static int safeAdd(int ... nums) {
+            long res = 0;
+            for (int n : nums) {
+                res = (res + n) % Integer.MAX_VALUE;
+            }
+            return (int)res;
+        }
+
+        @Override
+        public int hashCode() {
+            return safeAdd(hash(name.getKeyProperty("keyspace")),
+                    hash(name.getKeyProperty("scope")),
+                    hash(name.getKeyProperty("name")),
+                    hash(name.getKeyProperty("type")));
+        }
+    }
+
+    @Override
+    public MBeanServer newMBeanServer(String defaultDomain, MBeanServer outer, MBeanServerDelegate delegate) {
+        // It is important to set |interceptors| to true while creating the
+        // JmxMBeanSearver. It is required for calls to
+        // JmxMBeanServer.setMBeanServerInterceptor() to be allowed.
+        JmxMBeanServer nested = (JmxMBeanServer) JmxMBeanServer.newMBeanServer(defaultDomain, outer, delegate, true);
+        // This is not very clean, we depend on knowledge of how the Sun/Oracle
+        // MBean chain looks internally. But we need haxxor support, so 
+        // lets replace the interceptor.
+        // Note: Removed reflection gunk to eliminate jdk9+ warnings on 
+        // execution. Also, if we can get by without reflection, it is 
+        // better. 
+        final DefaultMBeanServerInterceptor interceptor = new DefaultMBeanServerInterceptor(outer != null ? outer : nested,
+                delegate, nested.getMBeanInstantiator(),
+                new TableRepository(defaultDomain, new Repository(defaultDomain)));
+        nested.setMBeanServerInterceptor(interceptor);
+        final MBeanServerDelegate d = nested.getMBeanServerDelegate();
+
+        try {
+            // Interceptor needs the delegate present. Normally done
+            // by inaccessible method in JmxMBeanServer
+            AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {
+                public Object run() throws Exception {
+                    interceptor.registerMBean(d, DELEGATE_NAME);
+                    return null;
+                }
+            });
+        } catch (PrivilegedActionException e) {
+            logger.log(SEVERE, "Unexpected error.", e);
+            throw new RuntimeException(e);
+        }
+
+        return new APIMBeanServer(getApiClient(), nested);
+    }
+}

src/main/java/com/scylladb/jmx/utils/APIMBeanServer.java

@@ -0,0 +1,327 @@
+package com.scylladb.jmx.utils;
+
+import static java.util.Arrays.asList;
+import static java.util.concurrent.Executors.newScheduledThreadPool;
+import static java.util.concurrent.TimeUnit.MINUTES;
+
+import java.io.ObjectInputStream;
+import java.net.UnknownHostException;
+import java.util.Set;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.logging.Logger;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+
+import javax.management.Attribute;
+import javax.management.AttributeList;
+import javax.management.AttributeNotFoundException;
+import javax.management.InstanceAlreadyExistsException;
+import javax.management.InstanceNotFoundException;
+import javax.management.IntrospectionException;
+import javax.management.InvalidAttributeValueException;
+import javax.management.ListenerNotFoundException;
+import javax.management.MBeanException;
+import javax.management.MBeanInfo;
+import javax.management.MBeanRegistrationException;
+import javax.management.MBeanServer;
+import javax.management.MalformedObjectNameException;
+import javax.management.NotCompliantMBeanException;
+import javax.management.NotificationFilter;
+import javax.management.NotificationListener;
+import javax.management.ObjectInstance;
+import javax.management.ObjectName;
+import javax.management.OperationsException;
+import javax.management.QueryExp;
+import javax.management.ReflectionException;
+import javax.management.loading.ClassLoaderRepository;
+
+import org.apache.cassandra.db.ColumnFamilyStore;
+import org.apache.cassandra.metrics.StreamingMetrics;
+
+import com.scylladb.jmx.api.APIClient;
+import com.scylladb.jmx.metrics.RegistrationChecker;
+import com.sun.jmx.mbeanserver.JmxMBeanServer;
+
+@SuppressWarnings("restriction")
+public class APIMBeanServer implements MBeanServer {
+    @SuppressWarnings("unused")
+    private static final Logger logger = Logger.getLogger(APIMBeanServer.class.getName());
+    private static final ScheduledExecutorService executor = newScheduledThreadPool(1);
+
+    private final RegistrationChecker columnFamilyStoreChecker = ColumnFamilyStore.createRegistrationChecker();
+    private final RegistrationChecker streamingMetricsChecker = StreamingMetrics.createRegistrationChecker();
+
+    private final APIClient client;
+    private final JmxMBeanServer server;
+
+    public APIMBeanServer(APIClient client, JmxMBeanServer server) {
+        this.client = client;
+        this.server = server;
+        
+    	executor.scheduleWithFixedDelay(() -> {
+    		for (RegistrationChecker c : asList(columnFamilyStoreChecker, streamingMetricsChecker)) {
+    			try {
+    				c.reap(client, server);
+    	        } catch (OperationsException | UnknownHostException e) {
+    	            // TODO: log?
+    	        }
+    		}
+        }, 1, 5, MINUTES);
+    }
+
+    private static ObjectInstance prepareForRemote(final ObjectInstance i) {
+        return new ObjectInstance(prepareForRemote(i.getObjectName()), i.getClassName());
+    }
+
+    private static ObjectName prepareForRemote(final ObjectName n) {
+        /*
+         * ObjectName.getInstance has changed in JDK (micro) updates so it no longer applies 
+         * overridable methods -> wrong name published. 
+         * Fix by doing explicit ObjectName instansiation. 
+         */
+        try {
+            return new ObjectName(n.getCanonicalName());
+        } catch (MalformedObjectNameException e) {
+            throw new IllegalArgumentException(n.toString());
+        }
+    }
+    
+    @Override
+    public ObjectInstance createMBean(String className, ObjectName name) throws ReflectionException,
+            InstanceAlreadyExistsException, MBeanRegistrationException, MBeanException, NotCompliantMBeanException {
+        return prepareForRemote(server.createMBean(className, name));
+    }
+
+    @Override
+    public ObjectInstance createMBean(String className, ObjectName name, ObjectName loaderName)
+            throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException, MBeanException,
+            NotCompliantMBeanException, InstanceNotFoundException {
+        return prepareForRemote(server.createMBean(className, name, loaderName));
+    }
+
+    @Override
+    public ObjectInstance createMBean(String className, ObjectName name, Object[] params, String[] signature)
+            throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException, MBeanException,
+            NotCompliantMBeanException {
+        return prepareForRemote(server.createMBean(className, name, params, signature));
+    }
+
+    @Override
+    public ObjectInstance createMBean(String className, ObjectName name, ObjectName loaderName, Object[] params,
+            String[] signature) throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException,
+                    MBeanException, NotCompliantMBeanException, InstanceNotFoundException {
+        return prepareForRemote(server.createMBean(className, name, loaderName, params, signature));
+    }
+
+    @Override
+    public ObjectInstance registerMBean(Object object, ObjectName name)
+            throws InstanceAlreadyExistsException, MBeanRegistrationException, NotCompliantMBeanException {
+        return prepareForRemote(server.registerMBean(object, name));
+    }
+
+    @Override
+    public void unregisterMBean(ObjectName name) throws InstanceNotFoundException, MBeanRegistrationException {
+        server.unregisterMBean(name);
+    }
+
+    @Override
+    public ObjectInstance getObjectInstance(ObjectName name) throws InstanceNotFoundException {
+        checkRegistrations(name);
+        return prepareForRemote(server.getObjectInstance(name));
+    }
+
+    @Override
+    public Set<ObjectName> queryNames(ObjectName name, QueryExp query) {
+        checkRegistrations(name);
+        return server.queryNames(name, query).stream().map(n -> prepareForRemote(n)).collect(Collectors.toSet());
+    }
+
+    @Override
+    public Set<ObjectInstance> queryMBeans(ObjectName name, QueryExp query) {
+        checkRegistrations(name);
+        return server.queryMBeans(name, query).stream().map(i -> prepareForRemote(i)).collect(Collectors.toSet());
+    }
+
+    @Override
+    public boolean isRegistered(ObjectName name) {
+        checkRegistrations(name);
+        return server.isRegistered(name);
+    }
+
+    @Override
+    public Integer getMBeanCount() {
+        return server.getMBeanCount();
+    }
+
+    @Override
+    public Object getAttribute(ObjectName name, String attribute)
+            throws MBeanException, AttributeNotFoundException, InstanceNotFoundException, ReflectionException {
+        checkRegistrations(name);
+        return server.getAttribute(name, attribute);
+    }
+
+    @Override
+    public AttributeList getAttributes(ObjectName name, String[] attributes)
+            throws InstanceNotFoundException, ReflectionException {
+        checkRegistrations(name);
+        return server.getAttributes(name, attributes);
+    }
+
+    @Override
+    public void setAttribute(ObjectName name, Attribute attribute) throws InstanceNotFoundException,
+            AttributeNotFoundException, InvalidAttributeValueException, MBeanException, ReflectionException {
+        checkRegistrations(name);
+        server.setAttribute(name, attribute);
+    }
+
+    @Override
+    public AttributeList setAttributes(ObjectName name, AttributeList attributes)
+            throws InstanceNotFoundException, ReflectionException {
+        checkRegistrations(name);
+        return server.setAttributes(name, attributes);
+    }
+
+    @Override
+    public Object invoke(ObjectName name, String operationName, Object[] params, String[] signature)
+            throws InstanceNotFoundException, MBeanException, ReflectionException {
+        checkRegistrations(name);
+        return server.invoke(name, operationName, params, signature);
+    }
+
+    @Override
+    public String getDefaultDomain() {
+        return server.getDefaultDomain();
+    }
+
+    @Override
+    public String[] getDomains() {
+        return server.getDomains();
+    }
+
+    @Override
+    public void addNotificationListener(ObjectName name, NotificationListener listener, NotificationFilter filter,
+            Object handback) throws InstanceNotFoundException {
+        server.addNotificationListener(name, listener, filter, handback);
+    }
+
+    @Override
+    public void addNotificationListener(ObjectName name, ObjectName listener, NotificationFilter filter,
+            Object handback) throws InstanceNotFoundException {
+        server.addNotificationListener(name, listener, filter, handback);
+    }
+
+    @Override
+    public void removeNotificationListener(ObjectName name, ObjectName listener)
+            throws InstanceNotFoundException, ListenerNotFoundException {
+        server.removeNotificationListener(name, listener);
+    }
+
+    @Override
+    public void removeNotificationListener(ObjectName name, ObjectName listener, NotificationFilter filter,
+            Object handback) throws InstanceNotFoundException, ListenerNotFoundException {
+        server.removeNotificationListener(name, listener, filter, handback);
+    }
+
+    @Override
+    public void removeNotificationListener(ObjectName name, NotificationListener listener)
+            throws InstanceNotFoundException, ListenerNotFoundException {
+        server.removeNotificationListener(name, listener);
+    }
+
+    @Override
+    public void removeNotificationListener(ObjectName name, NotificationListener listener, NotificationFilter filter,
+            Object handback) throws InstanceNotFoundException, ListenerNotFoundException {
+        server.removeNotificationListener(name, listener, filter, handback);
+    }
+
+    @Override
+    public MBeanInfo getMBeanInfo(ObjectName name)
+            throws InstanceNotFoundException, IntrospectionException, ReflectionException {
+        checkRegistrations(name);
+        return server.getMBeanInfo(name);
+    }
+
+    @Override
+    public boolean isInstanceOf(ObjectName name, String className) throws InstanceNotFoundException {
+        return server.isInstanceOf(name, className);
+    }
+
+    @Override
+    public Object instantiate(String className) throws ReflectionException, MBeanException {
+        return server.instantiate(className);
+    }
+
+    @Override
+    public Object instantiate(String className, ObjectName loaderName)
+            throws ReflectionException, MBeanException, InstanceNotFoundException {
+        return server.instantiate(className, loaderName);
+    }
+
+    @Override
+    public Object instantiate(String className, Object[] params, String[] signature)
+            throws ReflectionException, MBeanException {
+        return server.instantiate(className, params, signature);
+    }
+
+    @Override
+    public Object instantiate(String className, ObjectName loaderName, Object[] params, String[] signature)
+            throws ReflectionException, MBeanException, InstanceNotFoundException {
+        return server.instantiate(className, loaderName, params, signature);
+    }
+
+    @Override
+    @Deprecated
+    public ObjectInputStream deserialize(ObjectName name, byte[] data)
+            throws InstanceNotFoundException, OperationsException {
+        return server.deserialize(name, data);
+    }
+
+    @Override
+    @Deprecated
+    public ObjectInputStream deserialize(String className, byte[] data)
+            throws OperationsException, ReflectionException {
+        return server.deserialize(className, data);
+    }
+
+    @Override
+    @Deprecated
+    public ObjectInputStream deserialize(String className, ObjectName loaderName, byte[] data)
+            throws InstanceNotFoundException, OperationsException, ReflectionException {
+        return server.deserialize(className, loaderName, data);
+    }
+
+    @Override
+    public ClassLoader getClassLoaderFor(ObjectName mbeanName) throws InstanceNotFoundException {
+        return server.getClassLoaderFor(mbeanName);
+    }
+
+    @Override
+    public ClassLoader getClassLoader(ObjectName loaderName) throws InstanceNotFoundException {
+        return server.getClassLoader(loaderName);
+    }
+
+    @Override
+    public ClassLoaderRepository getClassLoaderRepository() {
+        return server.getClassLoaderRepository();
+    }
+
+    static final Pattern tables = Pattern.compile("^\\*?((Index)?ColumnFamil(ies|y)|(Index)?(Table(s)?)?)$");
+    
+    private void checkRegistrations(ObjectName name) {
+        if (name != null && server.isRegistered(name)) {
+            return;
+        }
+                
+        try {
+            String type = name != null ? name.getKeyProperty("type") : null;            
+            if (type == null || tables.matcher(type).matches()) {
+            	columnFamilyStoreChecker.check(client, server);
+            }
+            if (type == null || StreamingMetrics.TYPE_NAME.equals(type)) {
+            	streamingMetricsChecker.check(client, server);
+            }
+        } catch (OperationsException | UnknownHostException e) {
+            // TODO: log
+        }
+    }
+}

src/main/java/com/scylladb/jmx/utils/DateXmlAdapter.java

@@ -0,0 +1,18 @@
+package com.scylladb.jmx.utils;
+
+import jakarta.xml.bind.annotation.adapters.XmlAdapter;
+import java.time.Instant;
+import java.util.Date;
+
+public class DateXmlAdapter extends XmlAdapter<String, Date> {
+    @Override
+    public String marshal(Date v) throws Exception {
+        return Instant.ofEpochMilli(v.getTime()).toString();
+    }
+
+    @Override
+    public Date unmarshal(String v) throws Exception {
+        return new Date(Instant.parse(v).toEpochMilli());
+    }
+
+}

src/main/java/com/scylladb/jmx/utils/EstimatedHistogram.java

@@ -1,315 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
-
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * Copyright 2015 Cloudius Systems
- *
- * Modified by Cloudius Systems
- */
-
-package com.scylladb.jmx.utils;
-
-import java.util.Arrays;
-import java.util.concurrent.atomic.AtomicLongArray;
-
-import com.google.common.base.Objects;
-
-import org.slf4j.Logger;
-
-public class EstimatedHistogram {
-    /**
-     * The series of values to which the counts in `buckets` correspond: 1, 2,
-     * 3, 4, 5, 6, 7, 8, 10, 12, 14, 17, 20, etc. Thus, a `buckets` of [0, 0, 1,
-     * 10] would mean we had seen one value of 3 and 10 values of 4.
-     *
-     * The series starts at 1 and grows by 1.2 each time (rounding and removing
-     * duplicates). It goes from 1 to around 36M by default (creating 90+1
-     * buckets), which will give us timing resolution from microseconds to 36
-     * seconds, with less precision as the numbers get larger.
-     *
-     * Each bucket represents values from (previous bucket offset, current
-     * offset].
-     */
-    private final long[] bucketOffsets;
-
-    // buckets is one element longer than bucketOffsets -- the last element is
-    // values greater than the last offset
-    final AtomicLongArray buckets;
-
-    public EstimatedHistogram() {
-        this(90);
-    }
-
-    public EstimatedHistogram(int bucketCount) {
-        bucketOffsets = newOffsets(bucketCount);
-        buckets = new AtomicLongArray(bucketOffsets.length + 1);
-    }
-
-    public EstimatedHistogram(long[] offsets, long[] bucketData) {
-        assert bucketData.length == offsets.length + 1;
-        bucketOffsets = offsets;
-        buckets = new AtomicLongArray(bucketData);
-    }
-
-
-    public EstimatedHistogram(long[] bucketData) {
-        bucketOffsets = newOffsets(bucketData.length - 1);
-        buckets = new AtomicLongArray(bucketData);
-    }
-
-    private static long[] newOffsets(int size) {
-        if (size <= 0) {
-            return new long[0];
-        }
-        long[] result = new long[size];
-        long last = 1;
-        result[0] = last;
-        for (int i = 1; i < size; i++) {
-            long next = Math.round(last * 1.2);
-            if (next == last)
-                next++;
-            result[i] = next;
-            last = next;
-        }
-
-        return result;
-    }
-
-    /**
-     * @return the histogram values corresponding to each bucket index
-     */
-    public long[] getBucketOffsets() {
-        return bucketOffsets;
-    }
-
-    /**
-     * Increments the count of the bucket closest to n, rounding UP.
-     * 
-     * @param n
-     */
-    public void add(long n) {
-        int index = Arrays.binarySearch(bucketOffsets, n);
-        if (index < 0) {
-            // inexact match, take the first bucket higher than n
-            index = -index - 1;
-        }
-        // else exact match; we're good
-        buckets.incrementAndGet(index);
-    }
-
-    /**
-     * @return the count in the given bucket
-     */
-    long get(int bucket) {
-        return buckets.get(bucket);
-    }
-
-    /**
-     * @param reset
-     *            zero out buckets afterwards if true
-     * @return a long[] containing the current histogram buckets
-     */
-    public long[] getBuckets(boolean reset) {
-        final int len = buckets.length();
-        long[] rv = new long[len];
-
-        if (reset)
-            for (int i = 0; i < len; i++)
-                rv[i] = buckets.getAndSet(i, 0L);
-        else
-            for (int i = 0; i < len; i++)
-                rv[i] = buckets.get(i);
-
-        return rv;
-    }
-
-    /**
-     * @return the smallest value that could have been added to this histogram
-     */
-    public long min() {
-        for (int i = 0; i < buckets.length(); i++) {
-            if (buckets.get(i) > 0)
-                return i == 0 ? 0 : 1 + bucketOffsets[i - 1];
-        }
-        return 0;
-    }
-
-    /**
-     * @return the largest value that could have been added to this histogram.
-     *         If the histogram overflowed, returns Long.MAX_VALUE.
-     */
-    public long max() {
-        int lastBucket = buckets.length() - 1;
-        if (buckets.get(lastBucket) > 0)
-            return Long.MAX_VALUE;
-
-        for (int i = lastBucket - 1; i >= 0; i--) {
-            if (buckets.get(i) > 0)
-                return bucketOffsets[i];
-        }
-        return 0;
-    }
-
-    /**
-     * @param percentile
-     * @return estimated value at given percentile
-     */
-    public long percentile(double percentile) {
-        assert percentile >= 0 && percentile <= 1.0;
-        int lastBucket = buckets.length() - 1;
-        if (buckets.get(lastBucket) > 0)
-            throw new IllegalStateException(
-                    "Unable to compute when histogram overflowed");
-
-        long pcount = (long) Math.floor(count() * percentile);
-        if (pcount == 0)
-            return 0;
-
-        long elements = 0;
-        for (int i = 0; i < lastBucket; i++) {
-            elements += buckets.get(i);
-            if (elements >= pcount)
-                return bucketOffsets[i];
-        }
-        return 0;
-    }
-
-    /**
-     * @return the mean histogram value (average of bucket offsets, weighted by
-     *         count)
-     * @throws IllegalStateException
-     *             if any values were greater than the largest bucket threshold
-     */
-    public long mean() {
-        int lastBucket = buckets.length() - 1;
-        if (buckets.get(lastBucket) > 0)
-            throw new IllegalStateException(
-                    "Unable to compute ceiling for max when histogram overflowed");
-
-        long elements = 0;
-        long sum = 0;
-        for (int i = 0; i < lastBucket; i++) {
-            long bCount = buckets.get(i);
-            elements += bCount;
-            sum += bCount * bucketOffsets[i];
-        }
-
-        return (long) Math.ceil((double) sum / elements);
-    }
-
-    /**
-     * @return the total number of non-zero values
-     */
-    public long count() {
-        long sum = 0L;
-        for (int i = 0; i < buckets.length(); i++)
-            sum += buckets.get(i);
-        return sum;
-    }
-
-    /**
-     * @return true if this histogram has overflowed -- that is, a value larger
-     *         than our largest bucket could bound was added
-     */
-    public boolean isOverflowed() {
-        return buckets.get(buckets.length() - 1) > 0;
-    }
-
-    /**
-     * log.debug() every record in the histogram
-     *
-     * @param log
-     */
-    public void log(Logger log) {
-        // only print overflow if there is any
-        int nameCount;
-        if (buckets.get(buckets.length() - 1) == 0)
-            nameCount = buckets.length() - 1;
-        else
-            nameCount = buckets.length();
-        String[] names = new String[nameCount];
-
-        int maxNameLength = 0;
-        for (int i = 0; i < nameCount; i++) {
-            names[i] = nameOfRange(bucketOffsets, i);
-            maxNameLength = Math.max(maxNameLength, names[i].length());
-        }
-
-        // emit log records
-        String formatstr = "%" + maxNameLength + "s: %d";
-        for (int i = 0; i < nameCount; i++) {
-            long count = buckets.get(i);
-            // sort-of-hack to not print empty ranges at the start that are only
-            // used to demarcate the
-            // first populated range. for code clarity we don't omit this record
-            // from the maxNameLength
-            // calculation, and accept the unnecessary whitespace prefixes that
-            // will occasionally occur
-            if (i == 0 && count == 0)
-                continue;
-            log.debug(String.format(formatstr, names[i], count));
-        }
-    }
-
-    private static String nameOfRange(long[] bucketOffsets, int index) {
-        StringBuilder sb = new StringBuilder();
-        appendRange(sb, bucketOffsets, index);
-        return sb.toString();
-    }
-
-    private static void appendRange(StringBuilder sb, long[] bucketOffsets,
-            int index) {
-        sb.append("[");
-        if (index == 0)
-            if (bucketOffsets[0] > 0)
-                // by original definition, this histogram is for values greater
-                // than zero only;
-                // if values of 0 or less are required, an entry of lb-1 must be
-                // inserted at the start
-                sb.append("1");
-            else
-                sb.append("-Inf");
-        else
-            sb.append(bucketOffsets[index - 1] + 1);
-        sb.append("..");
-        if (index == bucketOffsets.length)
-            sb.append("Inf");
-        else
-            sb.append(bucketOffsets[index]);
-        sb.append("]");
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        if (this == o)
-            return true;
-
-        if (!(o instanceof EstimatedHistogram))
-            return false;
-
-        EstimatedHistogram that = (EstimatedHistogram) o;
-        return Arrays.equals(getBucketOffsets(), that.getBucketOffsets())
-                && Arrays.equals(getBuckets(false), that.getBuckets(false));
-    }
-
-    @Override
-    public int hashCode() {
-        return Objects.hashCode(getBucketOffsets(), getBuckets(false));
-    }
-}

src/main/java/com/scylladb/jmx/utils/RecentEstimatedHistogram.java

@@ -1,65 +0,0 @@
-package com.scylladb.jmx.utils;
-/*
- * Copyright (C) 2015 ScyllaDB
- */
-
-/*
- * This file is part of Scylla.
- *
- * Scylla is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Scylla is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Scylla.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-/**
- *
- * RecentEstimatedHistogram In the (deprecated) 'recent' functionality, each
- * call to get the values cleans the value.
- *
- * The RecentEstimatedHistogram support recent call to EstimatedHistogram.
- * It holds the latest total values and a call to getBuckets return the delta.
- *
- */
-public class RecentEstimatedHistogram extends EstimatedHistogram {
-    public RecentEstimatedHistogram() {
-    }
-
-    public RecentEstimatedHistogram(int bucketCount) {
-        super(bucketCount);
-    }
-
-    public RecentEstimatedHistogram(long[] offsets, long[] bucketData) {
-        super(offsets, bucketData);
-    }
-
-    /**
-     * Set the current buckets to new value and return the delta from the last
-     * getBuckets call
-     *
-     * @param bucketData
-     *            - new bucket value
-     * @return a long[] containing the current histogram difference buckets
-     */
-    public long[] getBuckets(long[] bucketData) {
-        if (bucketData.length == 0) {
-            return new long[0];
-        }
-        final int len = buckets.length();
-        long[] rv = new long[len];
-
-        for (int i = 0; i < len; i++) {
-            rv[i] = bucketData[i];
-            rv[i] -= buckets.getAndSet(i, bucketData[i]);
-        }
-        return rv;
-    }
-}

src/main/java/com/yammer/metrics/core/APICounter.java

@@ -1,29 +0,0 @@
-package com.yammer.metrics.core;
-/*
- * Copyright 2015 Cloudius Systems
- *
- * Modified by Cloudius Systems
- */
-
-import com.scylladb.jmx.api.APIClient;
-import com.yammer.metrics.core.Counter;
-
-public class APICounter extends Counter {
-    String url;
-    private APIClient c = new APIClient();
-    
-    public APICounter(String _url) {
-        super();
-        url = _url;
-    }
-    /**
-     * Returns the counter's current value.
-     *
-     * @return the counter's current value
-     */
-    public long count() {
-        return c.getLongValue(url);
-    }
-
-
-}

src/main/java/com/yammer/metrics/core/APIHistogram.java

@@ -1,201 +0,0 @@
-package com.yammer.metrics.core;
-
-/*
- * Copyright 2015 Cloudius Systems
- *
- * Modified by Cloudius Systems
- */
-
-import java.lang.reflect.Field;
-import java.util.concurrent.atomic.AtomicLong;
-import java.util.concurrent.atomic.AtomicReference;
-
-import com.scylladb.jmx.api.APIClient;
-import com.yammer.metrics.stats.Sample;
-import com.yammer.metrics.stats.Snapshot;
-
-public class APIHistogram extends Histogram {
-    Field countField;
-    Field minField;
-    Field maxField;
-    Field sumField;
-    Field varianceField;
-    Field sampleField;
-
-    long last_update = 0;
-    static final long UPDATE_INTERVAL = 50;
-    long updateInterval;
-    String url;
-    private APIClient c = new APIClient();
-
-    private void setFields() {
-        try {
-            minField = Histogram.class.getDeclaredField("min");
-            minField.setAccessible(true);
-            maxField = Histogram.class.getDeclaredField("max");
-            maxField.setAccessible(true);
-            sumField = Histogram.class.getDeclaredField("sum");
-            sumField.setAccessible(true);
-            varianceField = Histogram.class.getDeclaredField("variance");
-            varianceField.setAccessible(true);
-            sampleField = Histogram.class.getDeclaredField("sample");
-            sampleField.setAccessible(true);
-            countField = Histogram.class.getDeclaredField("count");
-            countField.setAccessible(true);
-            try {
-                getCount().set(0);
-            } catch (IllegalArgumentException | IllegalAccessException e) {
-                // There's no reason to get here
-                // and there's nothing we can do even if we would
-            }
-        } catch (NoSuchFieldException | SecurityException e) {
-            e.printStackTrace();
-        }
-    }
-
-    public AtomicLong getMin() throws IllegalArgumentException,
-            IllegalAccessException {
-        return (AtomicLong) minField.get(this);
-    }
-
-    public AtomicLong getMax() throws IllegalArgumentException,
-            IllegalAccessException {
-        return (AtomicLong) maxField.get(this);
-    }
-
-    public AtomicLong getSum() throws IllegalArgumentException,
-            IllegalAccessException {
-        return (AtomicLong) sumField.get(this);
-    }
-
-    public AtomicLong getCount() throws IllegalArgumentException,
-            IllegalAccessException {
-        return (AtomicLong) countField.get(this);
-    }
-
-    @SuppressWarnings("unchecked")
-    public AtomicReference<double[]> getVariance()
-            throws IllegalArgumentException, IllegalAccessException {
-        return (AtomicReference<double[]>) varianceField.get(this);
-    }
-
-    public Sample getSample() throws IllegalArgumentException,
-            IllegalAccessException {
-        return (Sample) sampleField.get(this);
-    }
-
-    public APIHistogram(String url, Sample sample) {
-        super(sample);
-        setFields();
-        this.url = url;
-    }
-
-    public APIHistogram(String url, SampleType type, long updateInterval) {
-        super(type);
-        setFields();
-        this.url = url;
-        this.updateInterval = updateInterval;
-    }
-
-    public APIHistogram(String url, SampleType type) {
-        this(url, type, UPDATE_INTERVAL);
-    }
-
-    public void update() {
-        long now = System.currentTimeMillis();
-        if (now - last_update < UPDATE_INTERVAL) {
-            return;
-        }
-        last_update = now;
-        clear();
-        HistogramValues vals = c.getHistogramValue(url);
-        try {
-            if (vals.sample != null) {
-                for (long v : vals.sample) {
-                    getSample().update(v);
-                }
-            }
-            getCount().set(vals.count);
-            getMax().set(vals.max);
-            getMin().set(vals.min);
-            getSum().set(vals.sum);
-            double[] newValue = new double[2];
-            newValue[0] = vals.mean;
-            newValue[1] = vals.variance;
-            getVariance().getAndSet(newValue);
-        } catch (IllegalArgumentException | IllegalAccessException e) {
-            e.printStackTrace();
-        }
-    }
-
-    /**
-     * Returns the number of values recorded.
-     *
-     * @return the number of values recorded
-     */
-    public long count() {
-        update();
-        return super.count();
-    }
-
-    /*
-     * (non-Javadoc)
-     * 
-     * @see com.yammer.metrics.core.Summarizable#max()
-     */
-    @Override
-    public double max() {
-        update();
-        return super.max();
-    }
-
-    /*
-     * (non-Javadoc)
-     * 
-     * @see com.yammer.metrics.core.Summarizable#min()
-     */
-    @Override
-    public double min() {
-        update();
-        return super.min();
-    }
-
-    /*
-     * (non-Javadoc)
-     * 
-     * @see com.yammer.metrics.core.Summarizable#mean()
-     */
-    @Override
-    public double mean() {
-        update();
-        return super.mean();
-    }
-
-    /*
-     * (non-Javadoc)
-     * 
-     * @see com.yammer.metrics.core.Summarizable#stdDev()
-     */
-    @Override
-    public double stdDev() {
-        update();
-        return super.stdDev();
-    }
-
-    /*
-     * (non-Javadoc)
-     * 
-     * @see com.yammer.metrics.core.Summarizable#sum()
-     */
-    @Override
-    public double sum() {
-        update();
-        return super.sum();
-    }
-
-    @Override
-    public Snapshot getSnapshot() {
-        update();
-        return super.getSnapshot();
-    }
-}

src/main/java/com/yammer/metrics/core/APIMeter.java

@@ -1,34 +0,0 @@
-package com.yammer.metrics.core;
-
-/*
- * Copyright 2015 Cloudius Systems
- *
- * Modified by Cloudius Systems
- */
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.TimeUnit;
-
-import com.scylladb.jmx.api.APIClient;
-
-public class APIMeter extends APISettableMeter {
-    String url;
-    private APIClient c = new APIClient();
-
-    public APIMeter(String _url, ScheduledExecutorService tickThread,
-            String eventType, TimeUnit rateUnit, Clock clock) {
-        super(tickThread, eventType, rateUnit, clock);
-        // TODO Auto-generated constructor stub
-        url = _url;
-    }
-
-    public long get_value() {
-        return c.getLongValue(url);
-    }
-
-    @Override
-    public void tick() {
-        set(get_value());
-        super.tick();
-    }
-
-}

src/main/java/com/yammer/metrics/core/APIMetricsRegistry.java

@@ -1,384 +0,0 @@
-package com.yammer.metrics.core;
-
-import java.lang.reflect.Field;
-import java.util.concurrent.ConcurrentMap;
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.TimeUnit;
-
-import com.yammer.metrics.core.APICounter;
-import com.yammer.metrics.core.APIMeter;
-import com.yammer.metrics.core.Clock;
-import com.yammer.metrics.core.Counter;
-import com.yammer.metrics.core.Meter;
-import com.yammer.metrics.core.Metric;
-import com.yammer.metrics.core.MetricName;
-import com.yammer.metrics.core.MetricsRegistry;
-import com.yammer.metrics.core.ThreadPools;
-import com.yammer.metrics.core.Histogram.SampleType;
-
-/*
- * Copyright 2015 Cloudius Systems
- *
- * Modified by Cloudius Systems
- */
-
-public class APIMetricsRegistry extends MetricsRegistry {
-    Field fieldMetrics;
-    Field fieldClock;
-    Field fieldThreadPool;
-
-    public APIMetricsRegistry() {
-        try {
-            fieldMetrics = MetricsRegistry.class.getDeclaredField("metrics");
-            fieldMetrics.setAccessible(true);
-            fieldClock = MetricsRegistry.class.getDeclaredField("clock");
-            fieldClock.setAccessible(true);
-            fieldThreadPool = MetricsRegistry.class
-                    .getDeclaredField("threadPools");
-            fieldThreadPool.setAccessible(true);
-        } catch (NoSuchFieldException | SecurityException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        }
-    }
-
-    public ThreadPools getThreadPools() {
-        try {
-            return (ThreadPools) fieldThreadPool.get(this);
-        } catch (IllegalArgumentException | IllegalAccessException e) {
-            e.printStackTrace();
-        }
-        return null;
-    }
-
-    public Clock getClock() {
-        try {
-            return (Clock) fieldClock.get(this);
-        } catch (IllegalArgumentException | IllegalAccessException e) {
-            e.printStackTrace();
-        }
-        return null;
-    }
-
-    @SuppressWarnings("unchecked")
-    public ConcurrentMap<MetricName, Metric> getMetrics() {
-        try {
-            return (ConcurrentMap<MetricName, Metric>) fieldMetrics.get(this);
-        } catch (IllegalArgumentException | IllegalAccessException e) {
-            e.printStackTrace();
-        }
-        return null;
-    }
-
-    /**
-     * Creates a new {@link Counter} and registers it under the given class and
-     * name.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @return a new {@link Counter}
-     */
-    public Counter newCounter(String url, Class<?> klass, String name) {
-        return newCounter(url, klass, name, null);
-    }
-
-    /**
-     * Creates a new {@link Counter} and registers it under the given class and
-     * name.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param scope
-     *            the scope of the metric
-     * @return a new {@link Counter}
-     */
-    public Counter newCounter(String url, Class<?> klass, String name,
-            String scope) {
-        return newCounter(url, createName(klass, name, scope));
-    }
-
-    /**
-     * Creates a new {@link Counter} and registers it under the given metric
-     * name.
-     *
-     * @param metricName
-     *            the name of the metric
-     * @return a new {@link Counter}
-     */
-    public Counter newCounter(String url, MetricName metricName) {
-        return getOrAdd(metricName, new APICounter(url));
-    }
-
-    /**
-     * Creates a new {@link Meter} and registers it under the given class and
-     * name.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param eventType
-     *            the plural name of the type of events the meter is measuring
-     *            (e.g., {@code "requests"})
-     * @param unit
-     *            the rate unit of the new meter
-     * @return a new {@link Meter}
-     */
-    public Meter newMeter(String url, Class<?> klass, String name,
-            String eventType, TimeUnit unit) {
-        return newMeter(url, klass, name, null, eventType, unit);
-    }
-
-    /**
-     * Creates a new {@link Meter} and registers it under the given class, name,
-     * and scope.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param scope
-     *            the scope of the metric
-     * @param eventType
-     *            the plural name of the type of events the meter is measuring
-     *            (e.g., {@code "requests"})
-     * @param unit
-     *            the rate unit of the new meter
-     * @return a new {@link Meter}
-     */
-    public Meter newMeter(String url, Class<?> klass, String name,
-            String scope, String eventType, TimeUnit unit) {
-        return newMeter(url, createName(klass, name, scope), eventType, unit);
-    }
-
-    private ScheduledExecutorService newMeterTickThreadPool() {
-        return getThreadPools().newScheduledThreadPool(2, "meter-tick");
-    }
-
-    /**
-     * Creates a new {@link Meter} and registers it under the given metric name.
-     *
-     * @param metricName
-     *            the name of the metric
-     * @param eventType
-     *            the plural name of the type of events the meter is measuring
-     *            (e.g., {@code "requests"})
-     * @param unit
-     *            the rate unit of the new meter
-     * @return a new {@link Meter}
-     */
-    public Meter newMeter(String url, MetricName metricName, String eventType,
-            TimeUnit unit) {
-        final Metric existingMetric = getMetrics().get(metricName);
-        if (existingMetric != null) {
-            return (Meter) existingMetric;
-        }
-        return getOrAdd(metricName, new APIMeter(url, newMeterTickThreadPool(),
-                eventType, unit, getClock()));
-    }
-
-    /**
-     * Creates a new {@link APISettableMeter} and registers it under the given metric name.
-     *
-     * @param metricName
-     *            the name of the metric
-     * @param eventType
-     *            the plural name of the type of events the meter is measuring
-     *            (e.g., {@code "requests"})
-     * @param unit
-     *            the rate unit of the new meter
-     * @return a new {@link Meter}
-     */
-    public Meter newSettableMeter(MetricName metricName, String eventType,
-            TimeUnit unit) {
-        final Metric existingMetric = getMetrics().get(metricName);
-        if (existingMetric != null) {
-            return (Meter) existingMetric;
-        }
-        return getOrAdd(metricName, new APISettableMeter(newMeterTickThreadPool(),
-                    eventType, unit, getClock()));
-    }
-
-    /**
-     * Creates a new {@link Histogram} and registers it under the given class
-     * and name.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param biased
-     *            whether or not the histogram should be biased
-     * @return a new {@link Histogram}
-     */
-    public Histogram newHistogram(String url, Class<?> klass, String name,
-            boolean biased) {
-        return newHistogram(url, klass, name, null, biased);
-    }
-
-    /**
-     * Creates a new {@link Histogram} and registers it under the given class,
-     * name, and scope.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param scope
-     *            the scope of the metric
-     * @param biased
-     *            whether or not the histogram should be biased
-     * @return a new {@link Histogram}
-     */
-    public Histogram newHistogram(String url, Class<?> klass, String name,
-            String scope, boolean biased) {
-        return newHistogram(url, createName(klass, name, scope), biased);
-    }
-
-    /**
-     * Creates a new non-biased {@link Histogram} and registers it under the
-     * given class and name.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @return a new {@link Histogram}
-     */
-    public Histogram newHistogram(String url, Class<?> klass, String name) {
-        return newHistogram(url, klass, name, false);
-    }
-
-    /**
-     * Creates a new non-biased {@link Histogram} and registers it under the
-     * given class, name, and scope.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param scope
-     *            the scope of the metric
-     * @return a new {@link Histogram}
-     */
-    public Histogram newHistogram(String url, Class<?> klass, String name,
-            String scope) {
-        return newHistogram(url, klass, name, scope, false);
-    }
-
-    /**
-     * Creates a new {@link Histogram} and registers it under the given metric
-     * name.
-     *
-     * @param metricName
-     *            the name of the metric
-     * @param biased
-     *            whether or not the histogram should be biased
-     * @return a new {@link Histogram}
-     */
-    public Histogram newHistogram(String url, MetricName metricName,
-            boolean biased) {
-        return getOrAdd(metricName, new APIHistogram(url,
-                biased ? SampleType.BIASED : SampleType.UNIFORM));
-    }
-
-    /**
-     * Creates a new {@link Timer} and registers it under the given class and
-     * name, measuring elapsed time in milliseconds and invocations per second.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @return a new {@link Timer}
-     */
-    public Timer newTimer(String url, Class<?> klass, String name) {
-        return newTimer(url, klass, name, null, TimeUnit.MILLISECONDS,
-                TimeUnit.SECONDS);
-    }
-
-    /**
-     * Creates a new {@link Timer} and registers it under the given class and
-     * name.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param durationUnit
-     *            the duration scale unit of the new timer
-     * @param rateUnit
-     *            the rate scale unit of the new timer
-     * @return a new {@link Timer}
-     */
-    public Timer newTimer(String url, Class<?> klass, String name,
-            TimeUnit durationUnit, TimeUnit rateUnit) {
-        return newTimer(url, klass, name, null, durationUnit, rateUnit);
-    }
-
-    /**
-     * Creates a new {@link Timer} and registers it under the given class, name,
-     * and scope, measuring elapsed time in milliseconds and invocations per
-     * second.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param scope
-     *            the scope of the metric
-     * @return a new {@link Timer}
-     */
-    public Timer newTimer(String url, Class<?> klass, String name, String scope) {
-        return newTimer(url, klass, name, scope, TimeUnit.MILLISECONDS,
-                TimeUnit.SECONDS);
-    }
-
-    /**
-     * Creates a new {@link Timer} and registers it under the given class, name,
-     * and scope.
-     *
-     * @param klass
-     *            the class which owns the metric
-     * @param name
-     *            the name of the metric
-     * @param scope
-     *            the scope of the metric
-     * @param durationUnit
-     *            the duration scale unit of the new timer
-     * @param rateUnit
-     *            the rate scale unit of the new timer
-     * @return a new {@link Timer}
-     */
-    public Timer newTimer(String url, Class<?> klass, String name,
-            String scope, TimeUnit durationUnit, TimeUnit rateUnit) {
-        return newTimer(url, createName(klass, name, scope), durationUnit,
-                rateUnit);
-    }
-
-    /**
-     * Creates a new {@link Timer} and registers it under the given metric name.
-     *
-     * @param metricName
-     *            the name of the metric
-     * @param durationUnit
-     *            the duration scale unit of the new timer
-     * @param rateUnit
-     *            the rate scale unit of the new timer
-     * @return a new {@link Timer}
-     */
-    public Timer newTimer(String url, MetricName metricName,
-            TimeUnit durationUnit, TimeUnit rateUnit) {
-        final Metric existingMetric = getMetrics().get(metricName);
-        if (existingMetric != null) {
-            return (Timer) existingMetric;
-        }
-        return getOrAdd(metricName, new APITimer(url, newMeterTickThreadPool(),
-                durationUnit, rateUnit, getClock()));
-    }
-
-}

src/main/java/com/yammer/metrics/core/APISettableMeter.java

@@ -1,49 +0,0 @@
-package com.yammer.metrics.core;
-
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.TimeUnit;
-
-/*
- * Copyright 2015 ScyllaDB
- *
- */
-/*
- * This file is part of Scylla.
- *
- * Scylla is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Scylla is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Scylla.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-public class APISettableMeter extends Meter {
-
-    public APISettableMeter(ScheduledExecutorService tickThread,
-            String eventType, TimeUnit rateUnit, Clock clock) {
-        super(tickThread, eventType, rateUnit, clock);
-    }
-
-    // Meter doesn't have a set value method.
-    // to mimic it, we clear the old value and set it to a new one.
-    // This is safe because the only this method would be used
-    // to update the values
-    public long set(long new_value) {
-        long res = super.count();
-        mark(-res);
-        mark(new_value);
-        return res;
-    }
-
-    @Override
-    public void tick() {
-        super.tick();
-    }
-}

src/main/java/com/yammer/metrics/core/APITimer.java

@@ -1,44 +0,0 @@
-/*
- * Copyright 2015 Cloudius Systems
- *
- */
-package com.yammer.metrics.core;
-
-import java.lang.reflect.Field;
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.TimeUnit;
-
-import com.yammer.metrics.core.Histogram.SampleType;
-
-/**
- * A timer metric which aggregates timing durations and provides duration
- * statistics, plus throughput statistics via {@link Meter}.
- */
-public class APITimer extends Timer {
-
-    public APITimer(String url, ScheduledExecutorService tickThread,
-            TimeUnit durationUnit, TimeUnit rateUnit) {
-        super(tickThread, durationUnit, rateUnit);
-        setHistogram(url);
-    }
-
-    public APITimer(String url, ScheduledExecutorService tickThread,
-            TimeUnit durationUnit, TimeUnit rateUnit, Clock clock) {
-        super(tickThread, durationUnit, rateUnit, clock);
-        setHistogram(url);
-    }
-
-    private void setHistogram(String url) {
-        Field histogram;
-        try {
-            histogram = Timer.class.getDeclaredField("histogram");
-            histogram.setAccessible(true);
-            histogram.set(this, new APIHistogram(url, SampleType.BIASED));
-        } catch (NoSuchFieldException | SecurityException
-                | IllegalArgumentException | IllegalAccessException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        }
-    }
-
-}

src/main/java/com/yammer/metrics/core/HistogramValues.java

@@ -1,11 +0,0 @@
-package com.yammer.metrics.core;
-
-public class HistogramValues {
-    public long count;
-    public long min;
-    public long max;
-    public long sum;
-    public double variance;
-    public double mean;
-    public long sample[];
-}

src/main/java/module-info.java

@@ -0,0 +1,16 @@
+module scylla.jmx {
+	opens com.scylladb.jmx.utils;
+	exports com.scylladb.jmx.utils;
+	opens com.scylladb.jmx.main;
+	exports com.scylladb.jmx.main;
+	opens com.scylladb.jmx.metrics;
+	exports com.scylladb.jmx.metrics;
+	requires java.logging;
+	requires java.management;
+	requires scylla.apiclient;
+	requires jakarta.json;
+	requires jakarta.ws.rs;
+	requires com.google.common;
+	requires jakarta.xml.bind;
+	requires com.fasterxml.jackson.annotation;
+}

src/main/java/org/apache/cassandra/db/ColumnFamilyStore.java

@@ -23,61 +23,146 @@
  */
 package org.apache.cassandra.db;
 
-import java.lang.management.ManagementFactory;
+import static jakarta.json.Json.createObjectBuilder;
-import java.net.ConnectException;
+import static java.lang.String.valueOf;
-import java.util.*;
+import static java.util.Arrays.asList;
-import java.util.concurrent.*;
+import static java.util.stream.Collectors.toMap;
 
-import javax.json.JsonArray;
+import jakarta.json.Json;
-import javax.json.JsonObject;
+import jakarta.json.JsonArray;
-import javax.management.*;
+import jakarta.json.JsonObject;
+import jakarta.json.JsonObjectBuilder;
+import jakarta.json.JsonReader;
+import jakarta.ws.rs.core.MultivaluedHashMap;
+import jakarta.ws.rs.core.MultivaluedMap;
+import java.io.StringReader;
+import java.io.OutputStream;
+import java.util.Collections;
+import java.util.EnumSet;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.logging.Logger;
+
+import javax.management.MBeanServer;
+import javax.management.MalformedObjectNameException;
+import javax.management.ObjectName;
+import javax.management.OperationsException;
 import javax.management.openmbean.CompositeData;
+import javax.management.openmbean.CompositeDataSupport;
+import javax.management.openmbean.CompositeType;
 import javax.management.openmbean.OpenDataException;
-import javax.ws.rs.ProcessingException;
+import javax.management.openmbean.OpenType;
-import javax.ws.rs.core.MultivaluedHashMap;
+import javax.management.openmbean.SimpleType;
-import javax.ws.rs.core.MultivaluedMap;
+import javax.management.openmbean.TabularDataSupport;
+import javax.management.openmbean.TabularType;
 
-import org.apache.cassandra.metrics.ColumnFamilyMetrics;
+import org.apache.cassandra.metrics.TableMetrics;
 
-import com.google.common.base.Throwables;
 import com.scylladb.jmx.api.APIClient;
+import com.scylladb.jmx.metrics.MetricsMBean;
+import com.scylladb.jmx.metrics.RegistrationChecker;
+import com.scylladb.jmx.metrics.RegistrationMode;
+import com.sun.jmx.mbeanserver.JmxMBeanServer;
+import com.google.common.base.Throwables;
 
-public class ColumnFamilyStore implements ColumnFamilyStoreMBean {
+public class ColumnFamilyStore extends MetricsMBean implements ColumnFamilyStoreMBean {
-    private static final java.util.logging.Logger logger = java.util.logging.Logger
+    private static final Logger logger = Logger.getLogger(ColumnFamilyStore.class.getName());
-            .getLogger(ColumnFamilyStore.class.getName());
+    @SuppressWarnings("unused")
-    private APIClient c = new APIClient();
+    private final String type;
-    private String type;
+    private final String keyspace;
-    private String keyspace;
+    private final String name;
-    private String name;
+    private static final String[] COUNTER_NAMES = new String[]{"raw", "count", "error", "string"};
-    private String mbeanName;
+    private static final String[] COUNTER_DESCS = new String[]
-    static final int INTERVAL = 1000; // update every 1second
+    { "partition key in raw hex bytes", // Table name and comments match Cassandra, we will use the partition key
-    public final ColumnFamilyMetrics metric;
+      "value of this partition for given sampler",
+      "value is within the error bounds plus or minus of this",
+      "the partition key turned into a human readable format" };
+    private static final CompositeType COUNTER_COMPOSITE_TYPE;
+    private static final TabularType COUNTER_TYPE;
 
-    private static Map<String, ColumnFamilyStore> cf = new HashMap<String, ColumnFamilyStore>();
+    private static final String[] SAMPLER_NAMES = new String[]{"cardinality", "partitions"};
-    private static Timer timer = new Timer("Column Family");
+    private static final String[] SAMPLER_DESCS = new String[]
+    { "cardinality of partitions",
+      "list of counter results" };
+
+    private static final String SAMPLING_RESULTS_NAME = "SAMPLING_RESULTS";
+    private static final CompositeType SAMPLING_RESULT;
+
+    public static final String SNAPSHOT_TRUNCATE_PREFIX = "truncated";
+    public static final String SNAPSHOT_DROP_PREFIX = "dropped";
+    private JsonObject tableSamplerResult = null;
+
+    private Future<JsonObject> futureTableSamperResult = null;
+    private ExecutorService service =  null;
+
+    static
+    {
+        try
+        {
+            OpenType<?>[] counterTypes = new OpenType[] { SimpleType.STRING, SimpleType.LONG, SimpleType.LONG, SimpleType.STRING };
+            COUNTER_COMPOSITE_TYPE = new CompositeType(SAMPLING_RESULTS_NAME, SAMPLING_RESULTS_NAME, COUNTER_NAMES, COUNTER_DESCS, counterTypes);
+            COUNTER_TYPE = new TabularType(SAMPLING_RESULTS_NAME, SAMPLING_RESULTS_NAME, COUNTER_COMPOSITE_TYPE, COUNTER_NAMES);
+
+            OpenType<?>[] samplerTypes = new OpenType[] { SimpleType.LONG, COUNTER_TYPE };
+            SAMPLING_RESULT = new CompositeType(SAMPLING_RESULTS_NAME, SAMPLING_RESULTS_NAME, SAMPLER_NAMES, SAMPLER_DESCS, samplerTypes);
+        } catch (OpenDataException e)
+        {
+            throw Throwables.propagate(e);
+        }
+    }
+
+    protected synchronized void startTableSampling(MultivaluedMap<String, String> queryParams) {
+        if (futureTableSamperResult != null) {
+            return;
+        }
+        futureTableSamperResult =  service.submit(() -> {
+            tableSamplerResult = client.getJsonObj("column_family/toppartitions/" + getCFName(), queryParams);
+            return null;
+        });
+    }
+
+    /*
+     * Wait until the action is completed
+     * It is safe to call this method multiple times
+     */
+    public synchronized void waitUntilSamplingCompleted() {
+        try {
+            if (futureTableSamperResult != null) {
+                futureTableSamperResult.get();
+                futureTableSamperResult = null;
+            }
+        } catch (InterruptedException | ExecutionException e) {
+            futureTableSamperResult = null;
+            throw new RuntimeException("Failed getting table statistics", e);
+        }
+    }
+
+
+    public static final Set<String> TYPE_NAMES = new HashSet<>(asList("ColumnFamilies", "IndexTables", "Tables"));
 
     public void log(String str) {
         logger.finest(str);
     }
 
-    public static void register_mbeans() {
+    public ColumnFamilyStore(APIClient client, String type, String keyspace, String name) {
-        TimerTask taskToExecute = new CheckRegistration();
+        super(client,
-        timer.schedule(taskToExecute, 100, INTERVAL);
+                new TableMetrics(keyspace, name, false /* hardcoded for now */));
-    }
-
-    public ColumnFamilyStore(String type, String keyspace, String name) {
         this.type = type;
         this.keyspace = keyspace;
         this.name = name;
-        mbeanName = getName(type, keyspace, name);
+        service =  Executors.newSingleThreadExecutor();
-        try {
+    }
-            MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
+
-            ObjectName nameObj = new ObjectName(mbeanName);
+    public ColumnFamilyStore(APIClient client, ObjectName name) {
-            mbs.registerMBean(this, nameObj);
+        this(client, name.getKeyProperty("type"), name.getKeyProperty("keyspace"), name.getKeyProperty("columnfamily"));
-        } catch (Exception e) {
-            throw new RuntimeException(e);
-        }
-        metric = new ColumnFamilyMetrics(this);
     }
 
     /** true if this CFS contains secondary index data */
@@ -97,422 +182,96 @@ public class ColumnFamilyStore implements ColumnFamilyStoreMBean {
         return keyspace + ":" + name;
     }
 
-    private static String getName(String type, String keyspace, String name) {
+    private static ObjectName getName(String type, String keyspace, String name) throws MalformedObjectNameException {
-        return "org.apache.cassandra.db:type=" + type + ",keyspace=" + keyspace
+        return new ObjectName(
-                + ",columnfamily=" + name;
+                "org.apache.cassandra.db:type=" + type + ",keyspace=" + keyspace + ",columnfamily=" + name);
     }
 
-    private static final class CheckRegistration extends TimerTask {
+	public static RegistrationChecker createRegistrationChecker() {
-        private APIClient c = new APIClient();
+		return new RegistrationChecker() {
-        private int missed_response = 0;
+			@Override
-        // After MAX_RETRY retry we assume the API is not available
+			protected void doCheck(APIClient client, JmxMBeanServer server, EnumSet<RegistrationMode> mode)
-        // and the jmx will shutdown
+					throws OperationsException {
-        private static final int MAX_RETRY = 30;
+				JsonArray mbeans = client.getJsonArray("/column_family/");
-        @Override
+				Set<ObjectName> all = new HashSet<ObjectName>();
-        public void run() {
+				for (int i = 0; i < mbeans.size(); i++) {
-            try {
+					JsonObject mbean = mbeans.getJsonObject(i);
-                JsonArray mbeans = c.getJsonArray("/column_family/");
+					all.add(getName(mbean.getString("type"), mbean.getString("ks"), mbean.getString("cf")));
-                Set<String> all_cf = new HashSet<String>();
+				}
-                for (int i = 0; i < mbeans.size(); i++) {
+				checkRegistration(server, all, mode,
-                    JsonObject mbean = mbeans.getJsonObject(i);
+						n -> TYPE_NAMES.contains(n.getKeyProperty("type")), n -> new ColumnFamilyStore(client, n));
-                    String name = getName(mbean.getString("type"),
+			}
-                            mbean.getString("ks"), mbean.getString("cf"));
+		};
-                    if (!cf.containsKey(name)) {
+	}
-                        ColumnFamilyStore cfs = new ColumnFamilyStore(
-                                mbean.getString("type"), mbean.getString("ks"),
-                                mbean.getString("cf"));
-                        cf.put(name, cfs);
-                    }
-                    all_cf.add(name);
-                }
-                // removing deleted column family
-                for (String n : cf.keySet()) {
-                    if (!all_cf.contains(n)) {
-                        cf.remove(n);
-                    }
-                }
-                missed_response = 0;
-            } catch (ProcessingException e) {
-                if (Throwables.getRootCause(e) instanceof ConnectException) {
-                    if (missed_response++ > MAX_RETRY) {
-                        System.err.println("API is not available, JMX is shuting down");
-                        System.exit(-1);
-                    }
-                } else {
-                 // ignoring exceptions, will retry on the next interval
-                }
-            } catch (Exception e) {
-                // ignoring exceptions, will retry on the next interval
-            }
-        }
-    }
 
     /**
      * @return the name of the column family
      */
+    @Override
     public String getColumnFamilyName() {
         log(" getColumnFamilyName()");
         return name;
     }
 
-    /**
-     * Returns the total amount of data stored in the memtable, including column
-     * related overhead.
-     *
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#memtableOnHeapSize
-     * @return The size in bytes.
-     * @deprecated
-     */
-    @Deprecated
-    public long getMemtableDataSize() {
-        log(" getMemtableDataSize()");
-        return c.getLongValue("/column_family/metrics/memtable_on_heap_size/" + getCFName());
-    }
-
-    /**
-     * Returns the total number of columns present in the memtable.
-     *
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#memtableColumnsCount
-     * @return The number of columns.
-     */
-    @Deprecated
-    public long getMemtableColumnsCount() {
-        log(" getMemtableColumnsCount()");
-        return metric.memtableColumnsCount.value();
-    }
-
-    /**
-     * Returns the number of times that a flush has resulted in the memtable
-     * being switched out.
-     *
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#memtableSwitchCount
-     * @return the number of memtable switches
-     */
-    @Deprecated
-    public int getMemtableSwitchCount() {
-        log(" getMemtableSwitchCount()");
-        return c.getIntValue("/column_family/metrics/memtable_switch_count/"  + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#recentSSTablesPerRead
-     * @return a histogram of the number of sstable data files accessed per
-     *         read: reading this property resets it
-     */
-    @Deprecated
-    public long[] getRecentSSTablesPerReadHistogram() {
-        log(" getRecentSSTablesPerReadHistogram()");
-        return metric.getRecentSSTablesPerRead();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#sstablesPerReadHistogram
-     * @return a histogram of the number of sstable data files accessed per read
-     */
-    @Deprecated
-    public long[] getSSTablesPerReadHistogram() {
-        log(" getSSTablesPerReadHistogram()");
-        return metric.sstablesPerRead.getBuckets(false);
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#readLatency
-     * @return the number of read operations on this column family
-     */
-    @Deprecated
-    public long getReadCount() {
-        log(" getReadCount()");
-        return c.getIntValue("/column_family/metrics/read/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#readLatency
-     * @return total read latency (divide by getReadCount() for average)
-     */
-    @Deprecated
-    public long getTotalReadLatencyMicros() {
-        log(" getTotalReadLatencyMicros()");
-        return c.getLongValue("/column_family/metrics/read_latency/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#readLatency
-     * @return an array representing the latency histogram
-     */
-    @Deprecated
-    public long[] getLifetimeReadLatencyHistogramMicros() {
-        log(" getLifetimeReadLatencyHistogramMicros()");
-        return metric.readLatency.totalLatencyHistogram.getBuckets(false);
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#readLatency
-     * @return an array representing the latency histogram
-     */
-    @Deprecated
-    public long[] getRecentReadLatencyHistogramMicros() {
-        log(" getRecentReadLatencyHistogramMicros()");
-        return metric.readLatency.getRecentLatencyHistogram();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#readLatency
-     * @return average latency per read operation since the last call
-     */
-    @Deprecated
-    public double getRecentReadLatencyMicros() {
-        log(" getRecentReadLatencyMicros()");
-        return metric.readLatency.getRecentLatency();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#writeLatency
-     * @return the number of write operations on this column family
-     */
-    @Deprecated
-    public long getWriteCount() {
-        log(" getWriteCount()");
-        return c.getLongValue("/column_family/metrics/write/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#writeLatency
-     * @return total write latency (divide by getReadCount() for average)
-     */
-    @Deprecated
-    public long getTotalWriteLatencyMicros() {
-        log(" getTotalWriteLatencyMicros()");
-        return c.getLongValue("/column_family/metrics/write_latency/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#writeLatency
-     * @return an array representing the latency histogram
-     */
-    @Deprecated
-    public long[] getLifetimeWriteLatencyHistogramMicros() {
-        log(" getLifetimeWriteLatencyHistogramMicros()");
-        return metric.writeLatency.totalLatencyHistogram.getBuckets(false);
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#writeLatency
-     * @return an array representing the latency histogram
-     */
-    @Deprecated
-    public long[] getRecentWriteLatencyHistogramMicros() {
-        log(" getRecentWriteLatencyHistogramMicros()");
-        return metric.writeLatency.getRecentLatencyHistogram();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#writeLatency
-     * @return average latency per write operation since the last call
-     */
-    @Deprecated
-    public double getRecentWriteLatencyMicros() {
-        log(" getRecentWriteLatencyMicros()");
-        return metric.writeLatency.getRecentLatency();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#pendingFlushes
-     * @return the estimated number of tasks pending for this column family
-     */
-    @Deprecated
-    public int getPendingTasks() {
-        log(" getPendingTasks()");
-        return c.getIntValue("/column_family/metrics/pending_flushes/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#liveSSTableCount
-     * @return the number of SSTables on disk for this CF
-     */
-    @Deprecated
-    public int getLiveSSTableCount() {
-        log(" getLiveSSTableCount()");
-        return c.getIntValue("/column_family/metrics/live_ss_table_count/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#liveDiskSpaceUsed
-     * @return disk space used by SSTables belonging to this CF
-     */
-    @Deprecated
-    public long getLiveDiskSpaceUsed() {
-        log(" getLiveDiskSpaceUsed()");
-        return c.getLongValue("/column_family/metrics/live_disk_space_used/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#totalDiskSpaceUsed
-     * @return total disk space used by SSTables belonging to this CF, including
-     *         obsolete ones waiting to be GC'd
-     */
-    @Deprecated
-    public long getTotalDiskSpaceUsed() {
-        log(" getTotalDiskSpaceUsed()");
-        return c.getLongValue("/column_family/metrics/total_disk_space_used/" + getCFName());
-    }
-
     /**
      * force a major compaction of this column family
      */
-    public void forceMajorCompaction()
+    public void forceMajorCompaction() throws ExecutionException, InterruptedException {
-            throws ExecutionException, InterruptedException {
         log(" forceMajorCompaction() throws ExecutionException, InterruptedException");
-        c.post("column_family/major_compaction/" + getCFName());
+        client.post("column_family/major_compaction/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#minRowSize
-     * @return the size of the smallest compacted row
-     */
-    @Deprecated
-    public long getMinRowSize() {
-        log(" getMinRowSize()");
-        return c.getLongValue("/column_family/metrics/min_row_size/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#maxRowSize
-     * @return the size of the largest compacted row
-     */
-    @Deprecated
-    public long getMaxRowSize() {
-        log(" getMaxRowSize()");
-        return c.getLongValue("/column_family/metrics/max_row_size/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#meanRowSize
-     * @return the average row size across all the sstables
-     */
-    @Deprecated
-    public long getMeanRowSize() {
-        log(" getMeanRowSize()");
-        return c.getLongValue("/column_family/metrics/mean_row_size/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#bloomFilterFalsePositives
-     */
-    @Deprecated
-    public long getBloomFilterFalsePositives() {
-        log(" getBloomFilterFalsePositives()");
-        return c.getLongValue("/column_family/metrics/bloom_filter_false_positives/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#recentBloomFilterFalsePositives
-     */
-    @Deprecated
-    public long getRecentBloomFilterFalsePositives() {
-        log(" getRecentBloomFilterFalsePositives()");
-        return c.getLongValue("/column_family/metrics/recent_bloom_filter_false_positives/" +getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#bloomFilterFalseRatio
-     */
-    @Deprecated
-    public double getBloomFilterFalseRatio() {
-        log(" getBloomFilterFalseRatio()");
-        return c.getDoubleValue("/column_family/metrics/bloom_filter_false_ratio/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#recentBloomFilterFalseRatio
-     */
-    @Deprecated
-    public double getRecentBloomFilterFalseRatio() {
-        log(" getRecentBloomFilterFalseRatio()");
-        return c.getDoubleValue("/column_family/metrics/recent_bloom_filter_false_ratio/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#bloomFilterDiskSpaceUsed
-     */
-    @Deprecated
-    public long getBloomFilterDiskSpaceUsed() {
-        log(" getBloomFilterDiskSpaceUsed()");
-        return c.getLongValue("/column_family/metrics/bloom_filter_disk_space_used/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#bloomFilterOffHeapMemoryUsed
-     */
-    @Deprecated
-    public long getBloomFilterOffHeapMemoryUsed() {
-        log(" getBloomFilterOffHeapMemoryUsed()");
-        return c.getLongValue("/column_family/metrics/bloom_filter_off_heap_memory_used/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#indexSummaryOffHeapMemoryUsed
-     */
-    @Deprecated
-    public long getIndexSummaryOffHeapMemoryUsed() {
-        log(" getIndexSummaryOffHeapMemoryUsed()");
-        return c.getLongValue("/column_family/metrics/index_summary_off_heap_memory_used/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#compressionMetadataOffHeapMemoryUsed
-     */
-    @Deprecated
-    public long getCompressionMetadataOffHeapMemoryUsed() {
-        log(" getCompressionMetadataOffHeapMemoryUsed()");
-        return c.getLongValue("/column_family/metrics/compression_metadata_off_heap_memory_used/" + getCFName());
     }
 
     /**
      * Gets the minimum number of sstables in queue before compaction kicks off
      */
+    @Override
     public int getMinimumCompactionThreshold() {
         log(" getMinimumCompactionThreshold()");
-        return c.getIntValue("column_family/minimum_compaction/" + getCFName());
+        return client.getIntValue("column_family/minimum_compaction/" + getCFName());
     }
 
     /**
      * Sets the minimum number of sstables in queue before compaction kicks off
      */
+    @Override
     public void setMinimumCompactionThreshold(int threshold) {
         log(" setMinimumCompactionThreshold(int threshold)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("value", Integer.toString(threshold));
-        c.post("column_family/minimum_compaction/" + getCFName(), queryParams);
+        client.post("column_family/minimum_compaction/" + getCFName(), queryParams);
     }
 
     /**
      * Gets the maximum number of sstables in queue before compaction kicks off
      */
+    @Override
     public int getMaximumCompactionThreshold() {
         log(" getMaximumCompactionThreshold()");
-        return c.getIntValue("column_family/maximum_compaction/" + getCFName());
+        return client.getIntValue("column_family/maximum_compaction/" + getCFName());
     }
 
     /**
      * Sets the maximum and maximum number of SSTables in queue before
      * compaction kicks off
      */
+    @Override
     public void setCompactionThresholds(int minThreshold, int maxThreshold) {
         log(" setCompactionThresholds(int minThreshold, int maxThreshold)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("minimum", Integer.toString(minThreshold));
         queryParams.add("maximum", Integer.toString(maxThreshold));
-        c.post("column_family/compaction" + getCFName(), queryParams);
+        client.post("column_family/compaction" + getCFName(), queryParams);
     }
 
     /**
      * Sets the maximum number of sstables in queue before compaction kicks off
      */
+    @Override
     public void setMaximumCompactionThreshold(int threshold) {
         log(" setMaximumCompactionThreshold(int threshold)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("value", Integer.toString(threshold));
-        c.post("column_family/maximum_compaction/" + getCFName(), queryParams);
+        client.post("column_family/maximum_compaction/" + getCFName(), queryParams);
     }
 
     /**
@@ -525,7 +284,7 @@ public class ColumnFamilyStore implements ColumnFamilyStoreMBean {
         log(" setCompactionStrategyClass(String className)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("class_name", className);
-        c.post("column_family/compaction_strategy/" + getCFName(), queryParams);
+        client.post("column_family/compaction_strategy/" + getCFName(), queryParams);
     }
 
     /**
@@ -533,17 +292,16 @@ public class ColumnFamilyStore implements ColumnFamilyStoreMBean {
      */
     public String getCompactionStrategyClass() {
         log(" getCompactionStrategyClass()");
-        return c.getStringValue(
+        return client.getStringValue("column_family/compaction_strategy/" + getCFName());
-                "column_family/compaction_strategy/" + getCFName());
     }
 
     /**
      * Get the compression parameters
      */
+    @Override
     public Map<String, String> getCompressionParameters() {
         log(" getCompressionParameters()");
-        return c.getMapStrValue(
+        return client.getMapStrValue("column_family/compression_parameters/" + getCFName());
-                "column_family/compression_parameters/" + getCFName());
     }
 
     /**
@@ -552,73 +310,49 @@ public class ColumnFamilyStore implements ColumnFamilyStoreMBean {
      * @param opts
      *            map of string names to values
      */
+    @Override
     public void setCompressionParameters(Map<String, String> opts) {
         log(" setCompressionParameters(Map<String,String> opts)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("opts", APIClient.mapToString(opts));
-        c.post("column_family/compression_parameters/" + getCFName(),
+        client.post("column_family/compression_parameters/" + getCFName(), queryParams);
-                queryParams);
     }
 
     /**
      * Set new crc check chance
      */
+    @Override
     public void setCrcCheckChance(double crcCheckChance) {
         log(" setCrcCheckChance(double crcCheckChance)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("check_chance", Double.toString(crcCheckChance));
-        c.post("column_family/crc_check_chance/" + getCFName(), queryParams);
+        client.post("column_family/crc_check_chance/" + getCFName(), queryParams);
     }
 
+    @Override
     public boolean isAutoCompactionDisabled() {
         log(" isAutoCompactionDisabled()");
-        return c.getBooleanValue("column_family/autocompaction/" + getCFName());
+        return !client.getBooleanValue("column_family/autocompaction/" + getCFName());
     }
 
     /** Number of tombstoned cells retreived during the last slicequery */
     @Deprecated
     public double getTombstonesPerSlice() {
         log(" getTombstonesPerSlice()");
-        return c.getDoubleValue("");
+        return client.getDoubleValue("");
     }
 
     /** Number of live cells retreived during the last slicequery */
     @Deprecated
     public double getLiveCellsPerSlice() {
         log(" getLiveCellsPerSlice()");
-        return c.getDoubleValue("");
+        return client.getDoubleValue("");
     }
 
+    @Override
     public long estimateKeys() {
         log(" estimateKeys()");
-        return c.getLongValue("column_family/estimate_keys/" + getCFName());
+        return client.getLongValue("column_family/estimate_keys/" + getCFName());
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#estimatedRowSizeHistogram
-     */
-    @Deprecated
-    public long[] getEstimatedRowSizeHistogram() {
-        log(" getEstimatedRowSizeHistogram()");
-        return metric.estimatedRowSizeHistogram.value();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#estimatedColumnCountHistogram
-     */
-    @Deprecated
-    public long[] getEstimatedColumnCountHistogram() {
-        log(" getEstimatedColumnCountHistogram()");
-        return metric.estimatedColumnCountHistogram.value();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#compressionRatio
-     */
-    @Deprecated
-    public double getCompressionRatio() {
-        log(" getCompressionRatio()");
-        return c.getDoubleValue("/column_family/metrics/compression_ratio/" + getCFName());
     }
 
     /**
@@ -626,9 +360,10 @@ public class ColumnFamilyStore implements ColumnFamilyStoreMBean {
      *
      * @return list of the index names
      */
+    @Override
     public List<String> getBuiltIndexes() {
         log(" getBuiltIndexes()");
-        return c.getListStrValue("column_family/built_indexes/" + getCFName());
+        return client.getListStrValue("column_family/built_indexes/" + getCFName());
     }
 
     /**
@@ -637,30 +372,49 @@ public class ColumnFamilyStore implements ColumnFamilyStoreMBean {
      * @param key
      * @return list of filenames containing the key
      */
+    @Override
     public List<String> getSSTablesForKey(String key) {
         log(" getSSTablesForKey(String key)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("key", key);
-        return c.getListStrValue("column_family/sstables/by_key/" + getCFName(),
+        return client.getListStrValue("column_family/sstables/by_key/" + getCFName(), queryParams);
-                queryParams);
     }
 
+    /**
+     * Returns a list of filenames that contain the given key on this node
+     * @param key
+     * @param hexFormat if key is in hex string format
+     * @return list of filenames containing the key
+     */
+    @Override
+    public List<String> getSSTablesForKey(String key, boolean hexFormat)
+    {
+        log(" getSSTablesForKey(String key)");
+        MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
+        queryParams.add("key", key);
+        if (hexFormat) {
+            queryParams.add("format", "hex");
+        }
+        return client.getListStrValue("column_family/sstables/by_key/" + getCFName(), queryParams);
+    }
     /**
      * Scan through Keyspace/ColumnFamily's data directory determine which
      * SSTables should be loaded and load them
      */
+    @Override
     public void loadNewSSTables() {
         log(" loadNewSSTables()");
-        c.post("column_family/sstable/" + getCFName());
+        client.post("column_family/sstable/" + getCFName());
     }
 
     /**
      * @return the number of SSTables in L0. Always return 0 if Leveled
      *         compaction is not enabled.
      */
+    @Override
     public int getUnleveledSSTables() {
         log(" getUnleveledSSTables()");
-        return c.getIntValue("column_family/sstables/unleveled/" + getCFName());
+        return client.getIntValue("column_family/sstables/unleveled/" + getCFName());
     }
 
     /**
@@ -668,10 +422,10 @@ public class ColumnFamilyStore implements ColumnFamilyStoreMBean {
      *         used. array index corresponds to level(int[0] is for level 0,
      *         ...).
      */
+    @Override
     public int[] getSSTableCountPerLevel() {
         log(" getSSTableCountPerLevel()");
-        int[] res = c.getIntArrValue(
+        int[] res = client.getIntArrValue("column_family/sstables/per_level/" + getCFName());
-                "column_family/sstables/per_level/" + getCFName());
         if (res.length == 0) {
             // no sstable count
             // should return null
@@ -686,18 +440,20 @@ public class ColumnFamilyStore implements ColumnFamilyStoreMBean {
      *
      * @return ratio
      */
+    @Override
     public double getDroppableTombstoneRatio() {
         log(" getDroppableTombstoneRatio()");
-        return c.getDoubleValue("column_family/droppable_ratio/" + getCFName());
+        return client.getDoubleValue("column_family/droppable_ratio/" + getCFName());
     }
 
     /**
      * @return the size of SSTables in "snapshots" subdirectory which aren't
      *         live anymore
      */
+    @Override
     public long trueSnapshotsSize() {
         log(" trueSnapshotsSize()");
-        return c.getLongValue("column_family/metrics/snapshots_size/" + getCFName());
+        return client.getLongValue("column_family/metrics/snapshots_size/" + getCFName());
     }
 
     public String getKeyspace() {
@@ -705,48 +461,104 @@ public class ColumnFamilyStore implements ColumnFamilyStoreMBean {
     }
 
     @Override
-    public long getRangeCount() {
+    public String getTableName() {
-        log("getRangeCount()");
+        log(" getTableName()");
-        return metric.rangeLatency.latency.count();
+        return name;
     }
 
     @Override
-    public long getTotalRangeLatencyMicros() {
+    public void forceMajorCompaction(boolean splitOutput) throws ExecutionException, InterruptedException {
-        log("getTotalRangeLatencyMicros()");
+        log(" forceMajorCompaction(boolean) throws ExecutionException, InterruptedException");
-        return metric.rangeLatency.totalLatency.count();
+        MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
+        queryParams.putSingle("value", valueOf(splitOutput));
+        client.post("column_family/major_compaction/" + getCFName(), queryParams);
     }
 
     @Override
-    public long[] getLifetimeRangeLatencyHistogramMicros() {
+    public void setCompactionParametersJson(String options) {
-        log("getLifetimeRangeLatencyHistogramMicros()");
+        log(" setCompactionParametersJson");
-        return metric.rangeLatency.totalLatencyHistogram.getBuckets(false);
+        JsonReader reader = Json.createReaderFactory(null).createReader(new StringReader(options));
+        setCompactionParameters(
+                reader.readObject().entrySet().stream().collect(toMap(Map.Entry::getKey, e -> e.toString())));
     }
 
     @Override
-    public long[] getRecentRangeLatencyHistogramMicros() {
+    public String getCompactionParametersJson() {
-        log("getRecentRangeLatencyHistogramMicros()");
+        log(" getCompactionParametersJson");
-        return metric.rangeLatency.getRecentLatencyHistogram();
+        JsonObjectBuilder b = createObjectBuilder();
+        getCompactionParameters().forEach(b::add);        
+        return b.build().toString();
     }
 
     @Override
-    public double getRecentRangeLatencyMicros() {
+    public void setCompactionParameters(Map<String, String> options) {
-        log("getRecentRangeLatencyMicros()");
+        for (Map.Entry<String, String> e : options.entrySet()) {
-        return metric.rangeLatency.getRecentLatency();
+            // See below
+            if ("class".equals(e.getKey())) {
+                setCompactionStrategyClass(e.getValue());
+            } else {
+                throw new IllegalArgumentException(e.getKey());
+            }
+        }
     }
 
     @Override
-    public void beginLocalSampling(String sampler, int capacity) {
+    public Map<String, String> getCompactionParameters() {
+        // We only currently support class. Here could have been a call that can 
+        // be expanded only on the server side, but that raises controversy. 
+        // Lets add some technical debt instead. 
+        return Collections.singletonMap("class", getCompactionStrategyClass());
+    }
+
+    @Override
+    public boolean isCompactionDiskSpaceCheckEnabled() {
         // TODO Auto-generated method stub
-        log("beginLocalSampling()");
+        log(" isCompactionDiskSpaceCheckEnabled()");
-
+        return false;
     }
 
     @Override
-    public CompositeData finishLocalSampling(String sampler, int count)
+    public void compactionDiskSpaceCheck(boolean enable) {
-            throws OpenDataException {
         // TODO Auto-generated method stub
-        log("finishLocalSampling()");
+        log(" compactionDiskSpaceCheck()");
-        return null;
     }
 
+    @Override
+    public void beginLocalSampling(String sampler_base, int capacity) {
+        MultivaluedMap<String, String> queryParams =  new MultivaluedHashMap<String, String>();
+        queryParams.add("capacity", Integer.toString(capacity));
+        if (sampler_base.contains(":")) {
+            String[] parts = sampler_base.split(":");
+            queryParams.add("duration", parts[1]);
+        } else {
+            queryParams.add("duration", "10000");
+        }
+        startTableSampling(queryParams);
+        log(" beginLocalSampling()");
+    }
+
+    @Override
+    public CompositeData finishLocalSampling(String samplerType, int count) throws OpenDataException {
+        log(" finishLocalSampling()");
+
+        waitUntilSamplingCompleted();
+
+        TabularDataSupport result = new TabularDataSupport(COUNTER_TYPE);
+
+        JsonArray counters = tableSamplerResult.getJsonArray((samplerType.equalsIgnoreCase("reads")) ? "read" : "write");
+        long cardinality = tableSamplerResult.getJsonNumber((samplerType.equalsIgnoreCase("reads")) ? "read_cardinality" : "write_cardinality").longValue();
+        long size = 0;
+        if (counters != null) {
+            size = (count > counters.size()) ? counters.size() : count;
+            for (int i = 0; i < size; i++) {
+                JsonObject counter = counters.getJsonObject(i);
+                result.put(new CompositeDataSupport(COUNTER_COMPOSITE_TYPE, COUNTER_NAMES,
+                        new Object[] { counter.getString("partition"), // raw
+                                counter.getJsonNumber("count").longValue(), // count
+                                counter.getJsonNumber("error").longValue(), // error
+                                counter.getString("partition") })); // string
+            }
+        }
+        return new CompositeDataSupport(SAMPLING_RESULT, SAMPLER_NAMES, new Object[] { cardinality, result });
+    }
 }

src/main/java/org/apache/cassandra/db/ColumnFamilyStoreMBean.java

@@ -17,6 +17,7 @@
  */
 package org.apache.cassandra.db;
 
+import java.util.Collection;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ExecutionException;
@@ -27,263 +28,28 @@ import javax.management.openmbean.OpenDataException;
 /**
  * The MBean interface for ColumnFamilyStore
  */
-public interface ColumnFamilyStoreMBean
+public interface ColumnFamilyStoreMBean {
-{
     /**
      * @return the name of the column family
      */
+    @Deprecated
     public String getColumnFamilyName();
 
-    /**
+    public String getTableName();
-     * Returns the total amount of data stored in the memtable, including
-     * column related overhead.
-     *
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#memtableOnHeapSize
-     * @return The size in bytes.
-     * @deprecated
-     */
-    @Deprecated
-    public long getMemtableDataSize();
-
-    /**
-     * Returns the total number of columns present in the memtable.
-     *
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#memtableColumnsCount
-     * @return The number of columns.
-     */
-    @Deprecated
-    public long getMemtableColumnsCount();
-
-    /**
-     * Returns the number of times that a flush has resulted in the
-     * memtable being switched out.
-     *
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#memtableSwitchCount
-     * @return the number of memtable switches
-     */
-    @Deprecated
-    public int getMemtableSwitchCount();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#recentSSTablesPerRead
-     * @return a histogram of the number of sstable data files accessed per read: reading this property resets it
-     */
-    @Deprecated
-    public long[] getRecentSSTablesPerReadHistogram();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#sstablesPerReadHistogram
-     * @return a histogram of the number of sstable data files accessed per read
-     */
-    @Deprecated
-    public long[] getSSTablesPerReadHistogram();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#readLatency
-     * @return the number of read operations on this column family
-     */
-    @Deprecated
-    public long getReadCount();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#readLatency
-     * @return total read latency (divide by getReadCount() for average)
-     */
-    @Deprecated
-    public long getTotalReadLatencyMicros();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#readLatency
-     * @return an array representing the latency histogram
-     */
-    @Deprecated
-    public long[] getLifetimeReadLatencyHistogramMicros();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#readLatency
-     * @return an array representing the latency histogram
-     */
-    @Deprecated
-    public long[] getRecentReadLatencyHistogramMicros();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#readLatency
-     * @return average latency per read operation since the last call
-     */
-    @Deprecated
-    public double getRecentReadLatencyMicros();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#writeLatency
-     * @return the number of write operations on this column family
-     */
-    @Deprecated
-    public long getWriteCount();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#writeLatency
-     * @return total write latency (divide by getReadCount() for average)
-     */
-    @Deprecated
-    public long getTotalWriteLatencyMicros();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#writeLatency
-     * @return an array representing the latency histogram
-     */
-    @Deprecated
-    public long[] getLifetimeWriteLatencyHistogramMicros();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#writeLatency
-     * @return an array representing the latency histogram
-     */
-    @Deprecated
-    public long[] getRecentWriteLatencyHistogramMicros();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#writeLatency
-     * @return average latency per write operation since the last call
-     */
-    @Deprecated
-    public double getRecentWriteLatencyMicros();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#rangeLatency
-     * @return the number of range slice operations on this column family
-     */
-    @Deprecated
-    public long getRangeCount();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#rangeLatency
-     * @return total range slice latency (divide by getRangeCount() for average)
-     */
-    @Deprecated
-    public long getTotalRangeLatencyMicros();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#rangeLatency
-     * @return an array representing the latency histogram
-     */
-    @Deprecated
-    public long[] getLifetimeRangeLatencyHistogramMicros();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#rangeLatency
-     * @return an array representing the latency histogram
-     */
-    @Deprecated
-    public long[] getRecentRangeLatencyHistogramMicros();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#rangeLatency
-     * @return average latency per range slice operation since the last call
-     */
-    @Deprecated
-    public double getRecentRangeLatencyMicros();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#pendingFlushes
-     * @return the estimated number of tasks pending for this column family
-     */
-    @Deprecated
-    public int getPendingTasks();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#liveSSTableCount
-     * @return the number of SSTables on disk for this CF
-     */
-    @Deprecated
-    public int getLiveSSTableCount();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#liveDiskSpaceUsed
-     * @return disk space used by SSTables belonging to this CF
-     */
-    @Deprecated
-    public long getLiveDiskSpaceUsed();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#totalDiskSpaceUsed
-     * @return total disk space used by SSTables belonging to this CF, including obsolete ones waiting to be GC'd
-     */
-    @Deprecated
-    public long getTotalDiskSpaceUsed();
 
     /**
      * force a major compaction of this column family
+     *
+     * @param splitOutput
+     *            true if the output of the major compaction should be split in
+     *            several sstables
      */
-    public void forceMajorCompaction() throws ExecutionException, InterruptedException;
+    public void forceMajorCompaction(boolean splitOutput) throws ExecutionException, InterruptedException;
 
-    /**
+    // NOT even default-throw implementing
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#minRowSize
+    // forceCompactionForTokenRange
-     * @return the size of the smallest compacted row
+    // as this is clearly a misplaced method that should not be in the mbean interface
-     */
+    // (uses internal cassandra types)
-    @Deprecated
-    public long getMinRowSize();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#maxRowSize
-     * @return the size of the largest compacted row
-     */
-    @Deprecated
-    public long getMaxRowSize();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#meanRowSize
-     * @return the average row size across all the sstables
-     */
-    @Deprecated
-    public long getMeanRowSize();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#bloomFilterFalsePositives
-     */
-    @Deprecated
-    public long getBloomFilterFalsePositives();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#recentBloomFilterFalsePositives
-     */
-    @Deprecated
-    public long getRecentBloomFilterFalsePositives();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#bloomFilterFalseRatio
-     */
-    @Deprecated
-    public double getBloomFilterFalseRatio();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#recentBloomFilterFalseRatio
-     */
-    @Deprecated
-    public double getRecentBloomFilterFalseRatio();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#bloomFilterDiskSpaceUsed
-     */
-    @Deprecated
-    public long getBloomFilterDiskSpaceUsed();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#bloomFilterOffHeapMemoryUsed
-     */
-    @Deprecated
-    public long getBloomFilterOffHeapMemoryUsed();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#indexSummaryOffHeapMemoryUsed
-     */
-    @Deprecated
-    public long getIndexSummaryOffHeapMemoryUsed();
-
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#compressionMetadataOffHeapMemoryUsed
-     */
-    @Deprecated
-    public long getCompressionMetadataOffHeapMemoryUsed();
 
     /**
      * Gets the minimum number of sstables in queue before compaction kicks off
@@ -301,7 +67,8 @@ public interface ColumnFamilyStoreMBean
     public int getMaximumCompactionThreshold();
 
     /**
-     * Sets the maximum and maximum number of SSTables in queue before compaction kicks off
+     * Sets the maximum and maximum number of SSTables in queue before
+     * compaction kicks off
      */
     public void setCompactionThresholds(int minThreshold, int maxThreshold);
 
@@ -311,26 +78,44 @@ public interface ColumnFamilyStoreMBean
     public void setMaximumCompactionThreshold(int threshold);
 
     /**
-     * Sets the compaction strategy by class name
+     * Sets the compaction parameters locally for this node
-     * @param className the name of the compaction strategy class
+     *
+     * Note that this will be set until an ALTER with compaction = {..} is
+     * executed or the node is restarted
+     *
+     * @param options
+     *            compaction options with the same syntax as when doing ALTER
+     *            ... WITH compaction = {..}
      */
-    public void setCompactionStrategyClass(String className);
+    public void setCompactionParametersJson(String options);
+
+    public String getCompactionParametersJson();
 
     /**
-     * Gets the compaction strategy class name
+     * Sets the compaction parameters locally for this node
+     *
+     * Note that this will be set until an ALTER with compaction = {..} is
+     * executed or the node is restarted
+     *
+     * @param options
+     *            compaction options map
      */
-    public String getCompactionStrategyClass();
+    public void setCompactionParameters(Map<String, String> options);
+
+    public Map<String, String> getCompactionParameters();
 
     /**
      * Get the compression parameters
      */
-    public Map<String,String> getCompressionParameters();
+    public Map<String, String> getCompressionParameters();
 
     /**
      * Set the compression parameters
-     * @param opts map of string names to values
+     * 
+     * @param opts
+     *            map of string names to values
      */
-    public void setCompressionParameters(Map<String,String> opts);
+    public void setCompressionParameters(Map<String, String> opts);
 
     /**
      * Set new crc check chance
@@ -339,81 +124,92 @@ public interface ColumnFamilyStoreMBean
 
     public boolean isAutoCompactionDisabled();
 
-    /** Number of tombstoned cells retreived during the last slicequery */
-    @Deprecated
-    public double getTombstonesPerSlice();
-
-    /** Number of live cells retreived during the last slicequery */
-    @Deprecated
-    public double getLiveCellsPerSlice();
-
     public long estimateKeys();
 
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#estimatedRowSizeHistogram
-     */
-    @Deprecated
-    public long[] getEstimatedRowSizeHistogram();
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#estimatedColumnCountHistogram
-     */
-    @Deprecated
-    public long[] getEstimatedColumnCountHistogram();
-    /**
-     * @see org.apache.cassandra.metrics.ColumnFamilyMetrics#compressionRatio
-     */
-    @Deprecated
-    public double getCompressionRatio();
-
     /**
      * Returns a list of the names of the built column indexes for current store
+     * 
      * @return list of the index names
      */
     public List<String> getBuiltIndexes();
 
     /**
      * Returns a list of filenames that contain the given key on this node
+     * 
      * @param key
      * @return list of filenames containing the key
      */
     public List<String> getSSTablesForKey(String key);
 
     /**
-     * Scan through Keyspace/ColumnFamily's data directory
+     * Returns a list of filenames that contain the given key on this node
-     * determine which SSTables should be loaded and load them
+     * @param key
+     * @param hexFormat if key is in hex string format
+     * @return list of filenames containing the key
+     */
+    public List<String> getSSTablesForKey(String key, boolean hexFormat);
+
+    /**
+     * Scan through Keyspace/ColumnFamily's data directory determine which
+     * SSTables should be loaded and load them
      */
     public void loadNewSSTables();
 
     /**
-     * @return the number of SSTables in L0.  Always return 0 if Leveled compaction is not enabled.
+     * @return the number of SSTables in L0. Always return 0 if Leveled
+     *         compaction is not enabled.
      */
     public int getUnleveledSSTables();
 
     /**
-     * @return sstable count for each level. null unless leveled compaction is used.
+     * @return sstable count for each level. null unless leveled compaction is
-     *         array index corresponds to level(int[0] is for level 0, ...).
+     *         used. array index corresponds to level(int[0] is for level 0,
+     *         ...).
      */
     public int[] getSSTableCountPerLevel();
 
     /**
-     * Get the ratio of droppable tombstones to real columns (and non-droppable tombstones)
+     * @return sstable fanout size for level compaction strategy.
+     */
+    default public int getLevelFanoutSize() {
+        // TODO: implement for real. This is sort of default. 
+        return 10;
+    }
+
+    /**
+     * Get the ratio of droppable tombstones to real columns (and non-droppable
+     * tombstones)
+     * 
      * @return ratio
      */
     public double getDroppableTombstoneRatio();
 
     /**
-     * @return the size of SSTables in "snapshots" subdirectory which aren't live anymore
+     * @return the size of SSTables in "snapshots" subdirectory which aren't
+     *         live anymore
      */
     public long trueSnapshotsSize();
 
     /**
-     * begin sampling for a specific sampler with a given capacity.  The cardinality may
+     * begin sampling for a specific sampler with a given capacity. The
-     * be larger than the capacity, but depending on the use case it may affect its accuracy
+     * cardinality may be larger than the capacity, but depending on the use
+     * case it may affect its accuracy
      */
     public void beginLocalSampling(String sampler, int capacity);
 
     /**
-     * @return top <i>count</i> items for the sampler since beginLocalSampling was called
+     * @return top <i>count</i> items for the sampler since beginLocalSampling
+     *         was called
      */
     public CompositeData finishLocalSampling(String sampler, int count) throws OpenDataException;
+
+    /*
+     * Is Compaction space check enabled
+     */
+    public boolean isCompactionDiskSpaceCheckEnabled();
+
+    /*
+     * Enable/Disable compaction space check
+     */
+    public void compactionDiskSpaceCheck(boolean enable);
 }

src/main/java/org/apache/cassandra/db/commitlog/CommitLog.java

@@ -22,85 +22,39 @@
  */
 package org.apache.cassandra.db.commitlog;
 
-import java.io.*;
+import java.io.IOException;
-import java.lang.management.ManagementFactory;
+import java.util.ArrayList;
-import java.util.*;
+import java.util.HashMap;
-
+import java.util.HashSet;
-import javax.management.MBeanServer;
+import java.util.List;
-import javax.management.ObjectName;
+import java.util.Map;
+import java.util.Set;
 
 import org.apache.cassandra.metrics.CommitLogMetrics;
 
 import com.scylladb.jmx.api.APIClient;
+import com.scylladb.jmx.metrics.MetricsMBean;
 
 /*
  * Commit Log tracks every write operation into the system. The aim of the commit log is to be able to
  * successfully recover data that was not stored to disk via the Memtable.
  */
-public class CommitLog implements CommitLogMBean {
+public class CommitLog extends MetricsMBean implements CommitLogMBean {
-
-    CommitLogMetrics metrics = new CommitLogMetrics();
     private static final java.util.logging.Logger logger = java.util.logging.Logger
             .getLogger(CommitLog.class.getName());
 
-    private APIClient c = new APIClient();
-
     public void log(String str) {
         logger.finest(str);
     }
 
-    private static final CommitLog instance = new CommitLog();
+    public CommitLog(APIClient client) {
-
+        super("org.apache.cassandra.db:type=Commitlog", client, new CommitLogMetrics());
-    public static CommitLog getInstance() {
-        return instance;
-    }
-
-    private CommitLog() {
-        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
-        try {
-            mbs.registerMBean(this,
-                    new ObjectName("org.apache.cassandra.db:type=Commitlog"));
-        } catch (Exception e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    /**
-     * Get the number of completed tasks
-     *
-     * @see org.apache.cassandra.metrics.CommitLogMetrics#completedTasks
-     */
-    @Deprecated
-    public long getCompletedTasks() {
-        log(" getCompletedTasks()");
-        return c.getLongValue("");
-    }
-
-    /**
-     * Get the number of tasks waiting to be executed
-     *
-     * @see org.apache.cassandra.metrics.CommitLogMetrics#pendingTasks
-     */
-    @Deprecated
-    public long getPendingTasks() {
-        log(" getPendingTasks()");
-        return c.getLongValue("");
-    }
-
-    /**
-     * Get the current size used by all the commitlog segments.
-     *
-     * @see org.apache.cassandra.metrics.CommitLogMetrics#totalCommitLogSize
-     */
-    @Deprecated
-    public long getTotalCommitlogSize() {
-        log(" getTotalCommitlogSize()");
-        return c.getLongValue("");
     }
 
     /**
      * Recover a single file.
      */
+    @Override
     public void recover(String path) throws IOException {
         log(" recover(String path) throws IOException");
     }
@@ -109,9 +63,10 @@ public class CommitLog implements CommitLogMBean {
      * @return file names (not full paths) of active commit log segments
      *         (segments containing unflushed data)
      */
+    @Override
     public List<String> getActiveSegmentNames() {
         log(" getActiveSegmentNames()");
-        List<String> lst = c.getListStrValue("/commitlog/segments/active");
+        List<String> lst = client.getListStrValue("/commitlog/segments/active");
         Set<String> set = new HashSet<String>();
         for (String l : lst) {
             String name = l.substring(l.lastIndexOf("/") + 1, l.length());
@@ -124,9 +79,10 @@ public class CommitLog implements CommitLogMBean {
      * @return Files which are pending for archival attempt. Does NOT include
      *         failed archive attempts.
      */
+    @Override
     public List<String> getArchivingSegmentNames() {
         log(" getArchivingSegmentNames()");
-        List<String> lst = c.getListStrValue("/commitlog/segments/archiving");
+        List<String> lst = client.getListStrValue("/commitlog/segments/archiving");
         Set<String> set = new HashSet<String>();
         for (String l : lst) {
             String name = l.substring(l.lastIndexOf("/") + 1, l.length());
@@ -139,35 +95,54 @@ public class CommitLog implements CommitLogMBean {
     public String getArchiveCommand() {
         // TODO Auto-generated method stub
         log(" getArchiveCommand()");
-        return c.getStringValue("");
+        return client.getStringValue("");
     }
 
     @Override
     public String getRestoreCommand() {
         // TODO Auto-generated method stub
         log(" getRestoreCommand()");
-        return c.getStringValue("");
+        return client.getStringValue("");
     }
 
     @Override
     public String getRestoreDirectories() {
         // TODO Auto-generated method stub
         log(" getRestoreDirectories()");
-        return c.getStringValue("");
+        return client.getStringValue("");
     }
 
     @Override
     public long getRestorePointInTime() {
         // TODO Auto-generated method stub
         log(" getRestorePointInTime()");
-        return c.getLongValue("");
+        return client.getLongValue("");
     }
 
     @Override
     public String getRestorePrecision() {
         // TODO Auto-generated method stub
         log(" getRestorePrecision()");
-        return c.getStringValue("");
+        return client.getStringValue("");
     }
 
+    @Override
+    public long getActiveContentSize() {
+        // scylla does not compress commit log, so this is equivalent
+        return getActiveOnDiskSize();
+    }
+
+    @Override
+    public long getActiveOnDiskSize() {
+        return client.getLongValue("/commitlog/metrics/total_commit_log_size");
+    }
+
+    @Override
+    public Map<String, Double> getActiveSegmentCompressionRatios() {
+        HashMap<String, Double> res = new HashMap<>();
+        for (String name : getActiveSegmentNames()) {
+            res.put(name, 1.0);
+        }
+        return res;
+    }
 }

src/main/java/org/apache/cassandra/db/commitlog/CommitLogMBean.java

@@ -19,32 +19,9 @@ package org.apache.cassandra.db.commitlog;
 
 import java.io.IOException;
 import java.util.List;
+import java.util.Map;
 
 public interface CommitLogMBean {
-    /**
-     * Get the number of completed tasks
-     *
-     * @see org.apache.cassandra.metrics.CommitLogMetrics#completedTasks
-     */
-    @Deprecated
-    public long getCompletedTasks();
-
-    /**
-     * Get the number of tasks waiting to be executed
-     *
-     * @see org.apache.cassandra.metrics.CommitLogMetrics#pendingTasks
-     */
-    @Deprecated
-    public long getPendingTasks();
-
-    /**
-     * Get the current size used by all the commitlog segments.
-     *
-     * @see org.apache.cassandra.metrics.CommitLogMetrics#totalCommitLogSize
-     */
-    @Deprecated
-    public long getTotalCommitlogSize();
-
     /**
      * Command to execute to archive a commitlog segment. Blank to disabled.
      */
@@ -92,4 +69,21 @@ public interface CommitLogMBean {
      *         failed archive attempts.
      */
     public List<String> getArchivingSegmentNames();
+
+    /**
+     * @return The size of the mutations in all active commit log segments
+     *         (uncompressed).
+     */
+    public long getActiveContentSize();
+
+    /**
+     * @return The space taken on disk by the commit log (compressed).
+     */
+    public long getActiveOnDiskSize();
+
+    /**
+     * @return A map between active log segments and the compression ratio
+     *         achieved for each.
+     */
+    public Map<String, Double> getActiveSegmentCompressionRatios();
 }

src/main/java/org/apache/cassandra/db/compaction/CompactionHistoryTabularData.java

@@ -22,8 +22,8 @@
  */
 package org.apache.cassandra.db.compaction;
 
-import javax.json.JsonArray;
+import jakarta.json.JsonArray;
-import javax.json.JsonObject;
+import jakarta.json.JsonObject;
 import javax.management.openmbean.CompositeDataSupport;
 import javax.management.openmbean.CompositeType;
 import javax.management.openmbean.OpenDataException;
@@ -36,13 +36,11 @@ import javax.management.openmbean.TabularType;
 import com.google.common.base.Throwables;
 
 public class CompactionHistoryTabularData {
-    private static final String[] ITEM_NAMES = new String[] { "id",
+    private static final String[] ITEM_NAMES = new String[] { "id", "keyspace_name", "columnfamily_name",
-            "keyspace_name", "columnfamily_name", "compacted_at", "bytes_in",
+            "compacted_at", "bytes_in", "bytes_out", "rows_merged" };
-            "bytes_out", "rows_merged" };
 
-    private static final String[] ITEM_DESCS = new String[] { "time uuid",
+    private static final String[] ITEM_DESCS = new String[] { "time uuid", "keyspace name", "column family name",
-            "keyspace name", "column family name", "compaction finished at",
+            "compaction finished at", "total bytes in", "total bytes out", "total rows merged" };
-            "total bytes in", "total bytes out", "total rows merged" };
 
     private static final String TYPE_NAME = "CompactionHistory";
 
@@ -56,22 +54,18 @@ public class CompactionHistoryTabularData {
 
     static {
         try {
-            ITEM_TYPES = new OpenType[] { SimpleType.STRING, SimpleType.STRING,
+            ITEM_TYPES = new OpenType[] { SimpleType.STRING, SimpleType.STRING, SimpleType.STRING, SimpleType.LONG,
-                    SimpleType.STRING, SimpleType.LONG, SimpleType.LONG,
+                    SimpleType.LONG, SimpleType.LONG, SimpleType.STRING };
-                    SimpleType.LONG, SimpleType.STRING };
 
-            COMPOSITE_TYPE = new CompositeType(TYPE_NAME, ROW_DESC, ITEM_NAMES,
+            COMPOSITE_TYPE = new CompositeType(TYPE_NAME, ROW_DESC, ITEM_NAMES, ITEM_DESCS, ITEM_TYPES);
-                    ITEM_DESCS, ITEM_TYPES);
 
-            TABULAR_TYPE = new TabularType(TYPE_NAME, ROW_DESC, COMPOSITE_TYPE,
+            TABULAR_TYPE = new TabularType(TYPE_NAME, ROW_DESC, COMPOSITE_TYPE, ITEM_NAMES);
-                    ITEM_NAMES);
         } catch (OpenDataException e) {
             throw Throwables.propagate(e);
         }
     }
 
-    public static TabularData from(JsonArray resultSet)
+    public static TabularData from(JsonArray resultSet) throws OpenDataException {
-            throws OpenDataException {
         TabularDataSupport result = new TabularDataSupport(TABULAR_TYPE);
         for (int i = 0; i < resultSet.size(); i++) {
             JsonObject row = resultSet.getJsonObject(i);
@@ -91,15 +85,13 @@ public class CompactionHistoryTabularData {
                     if (m > 0) {
                         sb.append(',');
                     }
-                    sb.append(entry.getString("key")).append(':')
+                    sb.append(entry.getString("key")).append(':').append(entry.getString("value"));
-                            .append(entry.getString("value"));
 
                 }
                 sb.append('}');
             }
             result.put(new CompositeDataSupport(COMPOSITE_TYPE, ITEM_NAMES,
-                    new Object[] { id, ksName, cfName, compactedAt, bytesIn,
+                    new Object[] { id, ksName, cfName, compactedAt, bytesIn, bytesOut, sb.toString() }));
-                            bytesOut, sb.toString() }));
         }
         return result;
     }

src/main/java/org/apache/cassandra/db/compaction/CompactionManager.java

@@ -17,24 +17,23 @@
  */
 package org.apache.cassandra.db.compaction;
 
-import java.lang.management.ManagementFactory;
+import jakarta.json.JsonArray;
+import jakarta.json.JsonObject;
+import jakarta.ws.rs.core.MultivaluedHashMap;
+import jakarta.ws.rs.core.MultivaluedMap;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.logging.Logger;
 
-import javax.json.JsonArray;
-import javax.json.JsonObject;
-import javax.management.MBeanServer;
-import javax.management.ObjectName;
 import javax.management.openmbean.OpenDataException;
 import javax.management.openmbean.TabularData;
-import javax.ws.rs.core.MultivaluedHashMap;
-import javax.ws.rs.core.MultivaluedMap;
 
 import org.apache.cassandra.metrics.CompactionMetrics;
 
 import com.scylladb.jmx.api.APIClient;
+import com.scylladb.jmx.metrics.MetricsMBean;
 
 /**
  * A singleton which manages a private executor of ongoing compactions.
@@ -49,37 +48,24 @@ import com.scylladb.jmx.api.APIClient;
  *
  * Modified by Cloudius Systems
  */
-public class CompactionManager implements CompactionManagerMBean {
+public class CompactionManager extends MetricsMBean implements CompactionManagerMBean {
     public static final String MBEAN_OBJECT_NAME = "org.apache.cassandra.db:type=CompactionManager";
-    private static final java.util.logging.Logger logger = java.util.logging.Logger
+    private static final Logger logger = Logger.getLogger(CompactionManager.class.getName());
-            .getLogger(CompactionManager.class.getName());
-    public static final CompactionManager instance;
-    private APIClient c = new APIClient();
-    CompactionMetrics metrics = new CompactionMetrics();
 
     public void log(String str) {
         logger.finest(str);
     }
 
-    static {
+    public CompactionManager(APIClient client) {
-        instance = new CompactionManager();
+        super(MBEAN_OBJECT_NAME, client, new CompactionMetrics());
-        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
-        try {
-            mbs.registerMBean(instance, new ObjectName(MBEAN_OBJECT_NAME));
-        } catch (Exception e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    public static CompactionManager getInstance() {
-        return instance;
     }
 
     /** List of running compaction objects. */
+    @Override
     public List<Map<String, String>> getCompactions() {
         log(" getCompactions()");
         List<Map<String, String>> results = new ArrayList<Map<String, String>>();
-        JsonArray compactions = c.getJsonArray("compaction_manager/compactions");
+        JsonArray compactions = client.getJsonArray("compaction_manager/compactions");
         for (int i = 0; i < compactions.size(); i++) {
             JsonObject compaction = compactions.getJsonObject(i);
             Map<String, String> result = new HashMap<String, String>();
@@ -89,67 +75,30 @@ public class CompactionManager implements CompactionManagerMBean {
             result.put("keyspace", compaction.getString("ks"));
             result.put("columnfamily", compaction.getString("cf"));
             result.put("unit", compaction.getString("unit"));
+            result.put("compactionId", (compaction.containsKey("id"))? compaction.getString("id") : "<none>");
             results.add(result);
         }
         return results;
     }
 
     /** List of running compaction summary strings. */
+    @Override
     public List<String> getCompactionSummary() {
         log(" getCompactionSummary()");
-        return c.getListStrValue("compaction_manager/compaction_summary");
+        return client.getListStrValue("compaction_manager/compaction_summary");
     }
 
     /** compaction history **/
+    @Override
     public TabularData getCompactionHistory() {
         log(" getCompactionHistory()");
         try {
-            return CompactionHistoryTabularData.from(c.getJsonArray("/compaction_manager/compaction_history"));
+            return CompactionHistoryTabularData.from(client.getJsonArray("/compaction_manager/compaction_history"));
         } catch (OpenDataException e) {
             return null;
         }
     }
 
-    /**
-     * @see org.apache.cassandra.metrics.CompactionMetrics#pendingTasks
-     * @return estimated number of compactions remaining to perform
-     */
-    @Deprecated
-    public int getPendingTasks() {
-        log(" getPendingTasks()");
-        return c.getIntValue("");
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CompactionMetrics#completedTasks
-     * @return number of completed compactions since server [re]start
-     */
-    @Deprecated
-    public long getCompletedTasks() {
-        log(" getCompletedTasks()");
-        return c.getLongValue("");
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CompactionMetrics#bytesCompacted
-     * @return total number of bytes compacted since server [re]start
-     */
-    @Deprecated
-    public long getTotalBytesCompacted() {
-        log(" getTotalBytesCompacted()");
-        return c.getLongValue("");
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CompactionMetrics#totalCompactionsCompleted
-     * @return total number of compactions since server [re]start
-     */
-    @Deprecated
-    public long getTotalCompactionsCompleted() {
-        log(" getTotalCompactionsCompleted()");
-        return c.getLongValue("");
-    }
-
     /**
      * Triggers the compaction of user specified sstables. You can specify files
      * from various keyspaces and columnfamilies. If you do so, user defined
@@ -161,11 +110,12 @@ public class CompactionManager implements CompactionManagerMBean {
      *            contain keyspace and columnfamily name in path(for 2.1+) or
      *            file name itself.
      */
+    @Override
     public void forceUserDefinedCompaction(String dataFiles) {
         log(" forceUserDefinedCompaction(String dataFiles)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("dataFiles", dataFiles);
-        c.post("compaction_manager/force_user_defined_compaction", queryParams);
+        client.post("compaction_manager/force_user_defined_compaction", queryParams);
     }
 
     /**
@@ -175,19 +125,21 @@ public class CompactionManager implements CompactionManagerMBean {
      *            the type of compaction to stop. Can be one of: - COMPACTION -
      *            VALIDATION - CLEANUP - SCRUB - INDEX_BUILD
      */
+    @Override
     public void stopCompaction(String type) {
         log(" stopCompaction(String type)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("type", type);
-        c.post("compaction_manager/stop_compaction", queryParams);
+        client.post("compaction_manager/stop_compaction", queryParams);
     }
 
     /**
      * Returns core size of compaction thread pool
      */
+    @Override
     public int getCoreCompactorThreads() {
         log(" getCoreCompactorThreads()");
-        return c.getIntValue("");
+        return client.getIntValue("");
     }
 
     /**
@@ -196,6 +148,7 @@ public class CompactionManager implements CompactionManagerMBean {
      * @param number
      *            New maximum of compaction threads
      */
+    @Override
     public void setCoreCompactorThreads(int number) {
         log(" setCoreCompactorThreads(int number)");
     }
@@ -203,9 +156,10 @@ public class CompactionManager implements CompactionManagerMBean {
     /**
      * Returns maximum size of compaction thread pool
      */
+    @Override
     public int getMaximumCompactorThreads() {
         log(" getMaximumCompactorThreads()");
-        return c.getIntValue("");
+        return client.getIntValue("");
     }
 
     /**
@@ -214,6 +168,7 @@ public class CompactionManager implements CompactionManagerMBean {
      * @param number
      *            New maximum of compaction threads
      */
+    @Override
     public void setMaximumCompactorThreads(int number) {
         log(" setMaximumCompactorThreads(int number)");
     }
@@ -221,9 +176,10 @@ public class CompactionManager implements CompactionManagerMBean {
     /**
      * Returns core size of validation thread pool
      */
+    @Override
     public int getCoreValidationThreads() {
         log(" getCoreValidationThreads()");
-        return c.getIntValue("");
+        return client.getIntValue("");
     }
 
     /**
@@ -232,6 +188,7 @@ public class CompactionManager implements CompactionManagerMBean {
      * @param number
      *            New maximum of compaction threads
      */
+    @Override
     public void setCoreValidationThreads(int number) {
         log(" setCoreValidationThreads(int number)");
     }
@@ -239,9 +196,10 @@ public class CompactionManager implements CompactionManagerMBean {
     /**
      * Returns size of validator thread pool
      */
+    @Override
     public int getMaximumValidatorThreads() {
         log(" getMaximumValidatorThreads()");
-        return c.getIntValue("");
+        return client.getIntValue("");
     }
 
     /**
@@ -250,8 +208,19 @@ public class CompactionManager implements CompactionManagerMBean {
      * @param number
      *            New maximum of validator threads
      */
+    @Override
     public void setMaximumValidatorThreads(int number) {
         log(" setMaximumValidatorThreads(int number)");
     }
 
+    @Override
+    public void stopCompactionById(String compactionId) {
+        // scylla does not have neither compaction ids nor the file described
+        // in:
+        // "Ids can be found in the transaction log files whose name starts with
+        // compaction_, located in the table transactions folder"
+        // (nodetool)
+        // TODO: throw?
+        log(" stopCompactionById");
+    }
 }

src/main/java/org/apache/cassandra/db/compaction/CompactionManagerMBean.java

@@ -19,6 +19,7 @@ package org.apache.cassandra.db.compaction;
 
 import java.util.List;
 import java.util.Map;
+
 import javax.management.openmbean.TabularData;
 
 public interface CompactionManagerMBean {
@@ -31,34 +32,6 @@ public interface CompactionManagerMBean {
     /** compaction history **/
     public TabularData getCompactionHistory();
 
-    /**
-     * @see org.apache.cassandra.metrics.CompactionMetrics#pendingTasks
-     * @return estimated number of compactions remaining to perform
-     */
-    @Deprecated
-    public int getPendingTasks();
-
-    /**
-     * @see org.apache.cassandra.metrics.CompactionMetrics#completedTasks
-     * @return number of completed compactions since server [re]start
-     */
-    @Deprecated
-    public long getCompletedTasks();
-
-    /**
-     * @see org.apache.cassandra.metrics.CompactionMetrics#bytesCompacted
-     * @return total number of bytes compacted since server [re]start
-     */
-    @Deprecated
-    public long getTotalBytesCompacted();
-
-    /**
-     * @see org.apache.cassandra.metrics.CompactionMetrics#totalCompactionsCompleted
-     * @return total number of compactions since server [re]start
-     */
-    @Deprecated
-    public long getTotalCompactionsCompleted();
-
     /**
      * Triggers the compaction of user specified sstables. You can specify files
      * from various keyspaces and columnfamilies. If you do so, user defined
@@ -70,6 +43,18 @@ public interface CompactionManagerMBean {
      */
     public void forceUserDefinedCompaction(String dataFiles);
 
+    /**
+     * Triggers the cleanup of user specified sstables.
+     * You can specify files from various keyspaces and columnfamilies.
+     * If you do so, cleanup is performed each file individually
+     *
+     * @param dataFiles a comma separated list of sstable file to cleanup.
+     *                  must contain keyspace and columnfamily name in path(for 2.1+) or file name itself.
+     */
+    default public void forceUserDefinedCleanup(String dataFiles) {
+        throw new UnsupportedOperationException();
+    }
+
     /**
      * Stop all running compaction-like tasks having the provided {@code type}.
      *
@@ -79,6 +64,16 @@ public interface CompactionManagerMBean {
      */
     public void stopCompaction(String type);
 
+    /**
+     * Stop an individual running compaction using the compactionId.
+     * 
+     * @param compactionId
+     *            Compaction ID of compaction to stop. Such IDs can be found in
+     *            the transaction log files whose name starts with compaction_,
+     *            located in the table transactions folder.
+     */
+    public void stopCompactionById(String compactionId);
+
     /**
      * Returns core size of compaction thread pool
      */

src/main/java/org/apache/cassandra/gms/ApplicationState.java

@@ -24,31 +24,12 @@
 
 package org.apache.cassandra.gms;
 
-public enum ApplicationState
+public enum ApplicationState {
-{
+    STATUS, LOAD, SCHEMA, DC, RACK, RELEASE_VERSION, REMOVAL_COORDINATOR, INTERNAL_IP, RPC_ADDRESS, X_11_PADDING, // padding
-    STATUS,
+                                                                                                                  // specifically
-    LOAD,
+                                                                                                                  // for
-    SCHEMA,
+                                                                                                                  // 1.1
-    DC,
+    SEVERITY, NET_VERSION, HOST_ID, TOKENS,
-    RACK,
-    RELEASE_VERSION,
-    REMOVAL_COORDINATOR,
-    INTERNAL_IP,
-    RPC_ADDRESS,
-    X_11_PADDING, // padding specifically for 1.1
-    SEVERITY,
-    NET_VERSION,
-    HOST_ID,
-    TOKENS,
     // pad to allow adding new states to existing cluster
-    X1,
+    X1, X2, X3, X4, X5, X6, X7, X8, X9, X10,
-    X2,
-    X3,
-    X4,
-    X5,
-    X6,
-    X7,
-    X8,
-    X9,
-    X10,
 }

src/main/java/org/apache/cassandra/gms/EndpointState.java

@@ -40,6 +40,8 @@ public class EndpointState {
     private volatile long updateTimestamp;
     private volatile boolean isAlive;
     ApplicationState[] applicationValues;
+    private static final java.util.logging.Logger logger = java.util.logging.Logger
+            .getLogger(EndpointState.class.getName());
 
     EndpointState(HeartBeatState initialHbState) {
         applicationValues = ApplicationState.values();
@@ -73,6 +75,10 @@ public class EndpointState {
     }
 
     void addApplicationState(int key, String value) {
+        if (key >= applicationValues.length) {
+            logger.warning("Unknown application state with id:" + key);
+            return;
+        }
         addApplicationState(applicationValues[key], value);
     }
 
@@ -96,8 +102,8 @@ public class EndpointState {
         isAlive = alive;
     }
 
+    @Override
     public String toString() {
-        return "EndpointState: HeartBeatState = " + hbState + ", AppStateMap = "
+        return "EndpointState: HeartBeatState = " + hbState + ", AppStateMap = " + applicationState;
-                + applicationState;
     }
 }

src/main/java/org/apache/cassandra/gms/FailureDetector.java

@@ -24,117 +24,155 @@
 
 package org.apache.cassandra.gms;
 
-import java.lang.management.ManagementFactory;
+import jakarta.json.JsonArray;
+import jakarta.json.JsonObject;
+import jakarta.json.JsonValue;
 import java.net.UnknownHostException;
-import java.util.*;
+import java.util.HashMap;
+import java.util.Map;
 
-import javax.json.JsonArray;
+import javax.management.openmbean.CompositeData;
-import javax.json.JsonObject;
+import javax.management.openmbean.CompositeDataSupport;
-import javax.management.MBeanServer;
+import javax.management.openmbean.CompositeType;
-import javax.management.ObjectName;
+import javax.management.openmbean.OpenDataException;
+import javax.management.openmbean.OpenType;
+import javax.management.openmbean.SimpleType;
+import javax.management.openmbean.TabularData;
+import javax.management.openmbean.TabularDataSupport;
+import javax.management.openmbean.TabularType;
 
 import com.scylladb.jmx.api.APIClient;
+import com.scylladb.jmx.metrics.APIMBean;
 
-public class FailureDetector implements FailureDetectorMBean {
+public class FailureDetector extends APIMBean implements FailureDetectorMBean {
     public static final String MBEAN_NAME = "org.apache.cassandra.net:type=FailureDetector";
     private static final java.util.logging.Logger logger = java.util.logging.Logger
             .getLogger(FailureDetector.class.getName());
 
-    private APIClient c = new APIClient();
+    public FailureDetector(APIClient c) {
+        super(c);
+    }
 
     public void log(String str) {
         logger.finest(str);
     }
 
-    private static final FailureDetector instance = new FailureDetector();
+    @Override
-
-    public static FailureDetector getInstance() {
-        return instance;
-    }
-
-    private FailureDetector() {
-        // Register this instance with JMX
-        try {
-            MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
-            mbs.registerMBean(this, new ObjectName(MBEAN_NAME));
-        } catch (Exception e) {
-            throw new RuntimeException(e);
-        }
-    }
-
     public void dumpInterArrivalTimes() {
         log(" dumpInterArrivalTimes()");
     }
 
+    @Override
     public void setPhiConvictThreshold(double phi) {
         log(" setPhiConvictThreshold(double phi)");
     }
 
+    @Override
     public double getPhiConvictThreshold() {
         log(" getPhiConvictThreshold()");
-        return c.getDoubleValue("/failure_detector/phi");
+        return client.getDoubleValue("/failure_detector/phi");
     }
 
+    @Override
     public String getAllEndpointStates() {
         log(" getAllEndpointStates()");
 
         StringBuilder sb = new StringBuilder();
-        for (Map.Entry<String, EndpointState> entry : getEndpointStateMap().entrySet())
+        for (Map.Entry<String, EndpointState> entry : getEndpointStateMap().entrySet()) {
-        {
             sb.append('/').append(entry.getKey()).append("\n");
             appendEndpointState(sb, entry.getValue());
         }
         return sb.toString();
     }
 
-    private void appendEndpointState(StringBuilder sb, EndpointState endpointState)
+    private void appendEndpointState(StringBuilder sb, EndpointState endpointState) {
-    {
         sb.append("  generation:").append(endpointState.getHeartBeatState().getGeneration()).append("\n");
         sb.append("  heartbeat:").append(endpointState.getHeartBeatState().getHeartBeatVersion()).append("\n");
-        for (Map.Entry<ApplicationState, String> state : endpointState.applicationState.entrySet())
+        for (Map.Entry<ApplicationState, String> state : endpointState.applicationState.entrySet()) {
-        {
+            if (state.getKey() == ApplicationState.TOKENS) {
-            if (state.getKey() == ApplicationState.TOKENS)
                 continue;
+            }
             sb.append("  ").append(state.getKey()).append(":").append(state.getValue()).append("\n");
         }
     }
 
     public Map<String, EndpointState> getEndpointStateMap() {
         Map<String, EndpointState> res = new HashMap<String, EndpointState>();
-        JsonArray arr = c.getJsonArray("/failure_detector/endpoints");
+        JsonArray arr = client.getJsonArray("/failure_detector/endpoints");
         for (int i = 0; i < arr.size(); i++) {
             JsonObject obj = arr.getJsonObject(i);
             EndpointState ep = new EndpointState(new HeartBeatState(obj.getInt("generation"), obj.getInt("version")));
             ep.setAliave(obj.getBoolean("is_alive"));
             ep.setUpdateTimestamp(obj.getJsonNumber("update_time").longValue());
             JsonArray states = obj.getJsonArray("application_state");
-            for (int j = 0; j < states.size(); j++) {
+            if (states != null) {
-                JsonObject state = states.getJsonObject(j);
+                for (int j = 0; j < states.size(); j++) {
-                ep.addApplicationState(state.getInt("application_state"), state.getString("value"));
+                    JsonObject state = states.getJsonObject(j);
+                    ep.addApplicationState(state.getInt("application_state"), state.getString("value"));
+                }
             }
             res.put(obj.getString("addrs"), ep);
         }
         return res;
     }
 
+    @Override
     public String getEndpointState(String address) throws UnknownHostException {
         log(" getEndpointState(String address) throws UnknownHostException");
-        return c.getStringValue("/failure_detector/endpoints/states/" +  address);
+        return client.getStringValue("/failure_detector/endpoints/states/" + address);
     }
 
+    @Override
     public Map<String, String> getSimpleStates() {
         log(" getSimpleStates()");
-        return c.getMapStrValue("/failure_detector/simple_states");
+        return client.getMapStrValue("/failure_detector/simple_states");
     }
 
+    @Override
     public int getDownEndpointCount() {
         log(" getDownEndpointCount()");
-        return c.getIntValue("/failure_detector/count/endpoint/down");
+        return client.getIntValue("/failure_detector/count/endpoint/down");
     }
 
+    @Override
     public int getUpEndpointCount() {
         log(" getUpEndpointCount()");
-        return c.getIntValue("/failure_detector/count/endpoint/up");
+        return client.getIntValue("/failure_detector/count/endpoint/up");
     }
 
+    // From origin:
+    // this is useless except to provide backwards compatibility in
+    // phi_convict_threshold,
+    // because everyone seems pretty accustomed to the default of 8, and users
+    // who have
+    // already tuned their phi_convict_threshold for their own environments
+    // won't need to
+    // change.
+    private final double PHI_FACTOR = 1.0 / Math.log(10.0); // 0.434...
+
+    @Override
+    public TabularData getPhiValues() throws OpenDataException {
+        final CompositeType ct = new CompositeType("Node", "Node", new String[] { "Endpoint", "PHI" },
+                new String[] { "IP of the endpoint", "PHI value" },
+                new OpenType[] { SimpleType.STRING, SimpleType.DOUBLE });
+        final TabularDataSupport results = new TabularDataSupport(
+                new TabularType("PhiList", "PhiList", ct, new String[] { "Endpoint" }));
+        final JsonArray arr = client.getJsonArray("/failure_detector/endpoint_phi_values");
+
+        for (JsonValue v : arr) {
+            JsonObject o = (JsonObject) v;
+            String endpoint = o.getString("endpoint");
+            double phi = Double.parseDouble(o.getString("phi"));
+
+            if (phi != Double.MIN_VALUE) {
+                // returned values are scaled by PHI_FACTOR so that the are on
+                // the same scale as PhiConvictThreshold
+                final CompositeData data = new CompositeDataSupport(ct, new String[] { "Endpoint", "PHI" },
+                        new Object[] { endpoint, phi * PHI_FACTOR });
+                results.put(data);
+            }
+        }
+
+        return results;
+    }
 }

src/main/java/org/apache/cassandra/gms/FailureDetectorMBean.java

@@ -20,8 +20,10 @@ package org.apache.cassandra.gms;
 import java.net.UnknownHostException;
 import java.util.Map;
 
-public interface FailureDetectorMBean
+import javax.management.openmbean.OpenDataException;
-{
+import javax.management.openmbean.TabularData;
+
+public interface FailureDetectorMBean {
     public void dumpInterArrivalTimes();
 
     public void setPhiConvictThreshold(double phi);
@@ -37,4 +39,6 @@ public interface FailureDetectorMBean
     public int getDownEndpointCount();
 
     public int getUpEndpointCount();
+
+    public TabularData getPhiValues() throws OpenDataException;
 }

src/main/java/org/apache/cassandra/gms/Gossiper.java

@@ -23,15 +23,13 @@
  */
 package org.apache.cassandra.gms;
 
-import java.lang.management.ManagementFactory;
+import jakarta.ws.rs.core.MultivaluedHashMap;
+import jakarta.ws.rs.core.MultivaluedMap;
 import java.net.UnknownHostException;
-
+import java.util.logging.Logger;
-import javax.management.MBeanServer;
-import javax.management.ObjectName;
-import javax.ws.rs.core.MultivaluedHashMap;
-import javax.ws.rs.core.MultivaluedMap;
 
 import com.scylladb.jmx.api.APIClient;
+import com.scylladb.jmx.metrics.APIMBean;
 
 /**
  * This module is responsible for Gossiping information for the local endpoint.
@@ -48,57 +46,43 @@ import com.scylladb.jmx.api.APIClient;
  * node as down in the Failure Detector.
  */
 
-public class Gossiper implements GossiperMBean {
+public class Gossiper extends APIMBean implements GossiperMBean {
     public static final String MBEAN_NAME = "org.apache.cassandra.net:type=Gossiper";
 
-    private static final java.util.logging.Logger logger = java.util.logging.Logger
+    private static final Logger logger = Logger.getLogger(Gossiper.class.getName());
-            .getLogger(Gossiper.class.getName());
 
-    private APIClient c = new APIClient();
+    public Gossiper(APIClient c) {
+        super(c);
+    }
 
     public void log(String str) {
         logger.finest(str);
     }
 
-    private static final Gossiper instance = new Gossiper();
+    @Override
-
-    public static Gossiper getInstance() {
-        return instance;
-    }
-
-    private Gossiper() {
-
-        // Register this instance with JMX
-        try {
-            MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
-            mbs.registerMBean(this, new ObjectName(MBEAN_NAME));
-        } catch (Exception e) {
-            throw new RuntimeException(e);
-        }
-    }
-
     public long getEndpointDowntime(String address) throws UnknownHostException {
         log(" getEndpointDowntime(String address) throws UnknownHostException");
-        return c.getLongValue("gossiper/downtime/" + address);
+        return client.getLongValue("gossiper/downtime/" + address);
     }
 
-    public int getCurrentGenerationNumber(String address)
+    @Override
-            throws UnknownHostException {
+    public int getCurrentGenerationNumber(String address) throws UnknownHostException {
         log(" getCurrentGenerationNumber(String address) throws UnknownHostException");
-        return c.getIntValue("gossiper/generation_number/" + address);
+        return client.getIntValue("gossiper/generation_number/" + address);
     }
 
-    public void unsafeAssassinateEndpoint(String address)
+    @Override
-            throws UnknownHostException {
+    public void unsafeAssassinateEndpoint(String address) throws UnknownHostException {
         log(" unsafeAssassinateEndpoint(String address) throws UnknownHostException");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("unsafe", "True");
-        c.post("gossiper/assassinate/" + address, queryParams);
+        client.post("gossiper/assassinate/" + address, queryParams);
     }
 
+    @Override
     public void assassinateEndpoint(String address) throws UnknownHostException {
         log(" assassinateEndpoint(String address) throws UnknownHostException");
-        c.post("gossiper/assassinate/" + address, null);
+        client.post("gossiper/assassinate/" + address, null);
     }
 
 }

src/main/java/org/apache/cassandra/gms/GossiperMBean.java

@@ -19,12 +19,13 @@ package org.apache.cassandra.gms;
 
 import java.net.UnknownHostException;
 
-public interface GossiperMBean
+public interface GossiperMBean {
-{
     public long getEndpointDowntime(String address) throws UnknownHostException;
 
     public int getCurrentGenerationNumber(String address) throws UnknownHostException;
 
     public void unsafeAssassinateEndpoint(String address) throws UnknownHostException;
 
+    public void assassinateEndpoint(String address) throws UnknownHostException;
+
 }

src/main/java/org/apache/cassandra/gms/HeartBeatState.java

@@ -58,8 +58,8 @@ class HeartBeatState {
         version = Integer.MAX_VALUE;
     }
 
+    @Override
     public String toString() {
-        return String.format("HeartBeat: generation = %d, version = %d",
+        return String.format("HeartBeat: generation = %d, version = %d", generation, version);
-                generation, version);
     }
 }

src/main/java/org/apache/cassandra/locator/EndpointSnitchInfo.java

@@ -17,43 +17,29 @@
  */
 package org.apache.cassandra.locator;
 
-import java.lang.management.ManagementFactory;
+import static java.util.Collections.singletonMap;
+
+import jakarta.ws.rs.core.MultivaluedHashMap;
+import jakarta.ws.rs.core.MultivaluedMap;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
-
+import java.util.logging.Logger;
-import javax.management.MBeanServer;
-import javax.management.ObjectName;
-import javax.ws.rs.core.MultivaluedHashMap;
-import javax.ws.rs.core.MultivaluedMap;
 
 import com.scylladb.jmx.api.APIClient;
+import com.scylladb.jmx.metrics.APIMBean;
 
-public class EndpointSnitchInfo implements EndpointSnitchInfoMBean {
+public class EndpointSnitchInfo extends APIMBean implements EndpointSnitchInfoMBean {
-    private static final java.util.logging.Logger logger = java.util.logging.Logger
+    public static final String MBEAN_NAME = "org.apache.cassandra.db:type=EndpointSnitchInfo";
-            .getLogger(EndpointSnitchInfo.class.getName());
+    private static final Logger logger = Logger.getLogger(EndpointSnitchInfo.class.getName());
 
-    private APIClient c = new APIClient();
+    public EndpointSnitchInfo(APIClient c) {
+        super(c);
+    }
 
     public void log(String str) {
         logger.finest(str);
     }
 
-    private static final EndpointSnitchInfo instance = new EndpointSnitchInfo();
-
-    public static EndpointSnitchInfo getInstance() {
-        return instance;
-    }
-
-    private EndpointSnitchInfo() {
-        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
-        try {
-            mbs.registerMBean(this, new ObjectName(
-                    "org.apache.cassandra.db:type=EndpointSnitchInfo"));
-        } catch (Exception e) {
-            throw new RuntimeException(e);
-        }
-    }
-
     /**
      * Provides the Rack name depending on the respective snitch used, given the
      * host name/ip
@@ -64,12 +50,9 @@ public class EndpointSnitchInfo implements EndpointSnitchInfoMBean {
     @Override
     public String getRack(String host) throws UnknownHostException {
         log("getRack(String host) throws UnknownHostException");
-        MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
+        MultivaluedMap<String, String> queryParams = host != null ? new MultivaluedHashMap<String, String>(
-        if (host == null) {
+                singletonMap("host", InetAddress.getByName(host).getHostAddress())) : null;
-            host = InetAddress.getLoopbackAddress().getHostAddress();
+        return client.getStringValue("/snitch/rack", queryParams, 10000);
-        }
-        queryParams.add("host", host);
-        return c.getStringValue("/snitch/rack", queryParams, 10000);
     }
 
     /**
@@ -82,12 +65,9 @@ public class EndpointSnitchInfo implements EndpointSnitchInfoMBean {
     @Override
     public String getDatacenter(String host) throws UnknownHostException {
         log(" getDatacenter(String host) throws UnknownHostException");
-        MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
+        MultivaluedMap<String, String> queryParams = host != null ? new MultivaluedHashMap<String, String>(
-        if (host == null) {
+                singletonMap("host", InetAddress.getByName(host).getHostAddress())) : null;
-            host = InetAddress.getLoopbackAddress().getHostAddress();
+        return client.getStringValue("/snitch/datacenter", queryParams, 10000);
-        }
-        queryParams.add("host", host);
-        return c.getStringValue("/snitch/datacenter", queryParams, 10000);
     }
 
     /**
@@ -98,7 +78,16 @@ public class EndpointSnitchInfo implements EndpointSnitchInfoMBean {
     @Override
     public String getSnitchName() {
         log(" getSnitchName()");
-        return c.getStringValue("/snitch/name");
+        return client.getStringValue("/snitch/name");
     }
 
+    @Override
+    public String getRack() {
+        return client.getStringValue("/snitch/rack", null, 10000);
+    }
+
+    @Override
+    public String getDatacenter() {
+        return client.getStringValue("/snitch/datacenter", null, 10000);
+    }
 }

src/main/java/org/apache/cassandra/locator/EndpointSnitchInfoMBean.java

@@ -22,25 +22,40 @@ import java.net.UnknownHostException;
 /**
  * MBean exposing standard Snitch info
  */
-public interface EndpointSnitchInfoMBean
+public interface EndpointSnitchInfoMBean {
-{
     /**
-     * Provides the Rack name depending on the respective snitch used, given the host name/ip
+     * Provides the Rack name depending on the respective snitch used, given the
+     * host name/ip
+     * 
      * @param host
      * @throws UnknownHostException
      */
     public String getRack(String host) throws UnknownHostException;
 
     /**
-     * Provides the Datacenter name depending on the respective snitch used, given the hostname/ip
+     * Provides the Datacenter name depending on the respective snitch used,
+     * given the hostname/ip
+     * 
      * @param host
      * @throws UnknownHostException
      */
     public String getDatacenter(String host) throws UnknownHostException;
 
+    /**
+     * Provides the Rack name depending on the respective snitch used for this
+     * node
+     */
+    public String getRack();
+
+    /**
+     * Provides the Datacenter name depending on the respective snitch used for
+     * this node
+     */
+    public String getDatacenter();
 
     /**
      * Provides the snitch name of the cluster
+     * 
      * @return Snitch name
      */
     public String getSnitchName();

src/main/java/org/apache/cassandra/metrics/CASClientRequestMetrics.java

@@ -25,34 +25,20 @@
 
 package org.apache.cassandra.metrics;
 
-import com.scylladb.jmx.metrics.APIMetrics;
+import javax.management.MalformedObjectNameException;
-import com.yammer.metrics.core.*;
 
+// TODO: In StorageProxy
 public class CASClientRequestMetrics extends ClientRequestMetrics {
 
-    public final Histogram contention;
+    public CASClientRequestMetrics(String scope, String url) {
-    /* Used only for write */
+        super(scope, url);
-    public final Counter conditionNotMet;
-
-    public final Counter unfinishedCommit;
-
-    public CASClientRequestMetrics(String url, String scope) {
-        super(url, scope);
-        contention = APIMetrics.newHistogram(url + "contention",
-                factory.createMetricName("ContentionHistogram"), true);
-        conditionNotMet = APIMetrics.newCounter(url + "condition_not_met",
-                factory.createMetricName("ConditionNotMet"));
-        unfinishedCommit = APIMetrics.newCounter(url + "unfinished_commit",
-                factory.createMetricName("UnfinishedCommit"));
     }
 
-    public void release() {
+    @Override
-        super.release();
+    public void register(MetricsRegistry registry) throws MalformedObjectNameException {
-        APIMetrics.defaultRegistry().removeMetric(
+        super.register(registry);
-                factory.createMetricName("ContentionHistogram"));
+        registry.register(() -> registry.histogram(uri + "/contention", true), names("ContentionHistogram"));
-        APIMetrics.defaultRegistry().removeMetric(
+        registry.register(() -> registry.counter(uri + "/condition_not_met"), names("ConditionNotMet"));
-                factory.createMetricName("ConditionNotMet"));
+        registry.register(() -> registry.counter(uri + "/unfinished_commit"), names("UnfinishedCommit"));
-        APIMetrics.defaultRegistry().removeMetric(
-                factory.createMetricName("UnfinishedCommit"));
     }
 }

src/main/java/org/apache/cassandra/metrics/CacheMetrics.java

@@ -23,37 +23,19 @@
  */
 package org.apache.cassandra.metrics;
 
-import java.util.concurrent.TimeUnit;
+import javax.management.MalformedObjectNameException;
-import java.util.concurrent.atomic.AtomicLong;
-
-import com.scylladb.jmx.api.APIClient;
-import com.scylladb.jmx.metrics.APIMetrics;
-import com.scylladb.jmx.metrics.DefaultNameFactory;
-import com.scylladb.jmx.metrics.MetricNameFactory;
-import com.yammer.metrics.core.Gauge;
-import com.yammer.metrics.core.Meter;
 
 /**
  * Metrics for {@code ICache}.
  */
-public class CacheMetrics {
+public class CacheMetrics implements Metrics {
-    /** Cache capacity in bytes */
-    public final Gauge<Long> capacity;
-    /** Total number of cache hits */
-    public final Meter hits;
-    /** Total number of cache requests */
-    public final Meter requests;
-    /** cache hit rate */
-    public final Gauge<Double> hitRate;
-    /** Total size of cache, in bytes */
-    public final Gauge<Long> size;
-    /** Total number of cache entries */
-    public final Gauge<Integer> entries;
 
-    private final AtomicLong lastRequests = new AtomicLong(0);
+    private final String type;
-    private final AtomicLong lastHits = new AtomicLong(0);
+    private final String url;
 
-    private APIClient c = new APIClient();
+    private String compose(String value) {
+        return "/cache_service/metrics/" + url + "/" + value;
+    }
 
     /**
      * Create metrics for given cache.
@@ -64,59 +46,21 @@ public class CacheMetrics {
      *            Cache to measure metrics
      */
     public CacheMetrics(String type, final String url) {
+        this.type = type;
+        this.url = url;
+    }
+
+    @Override
+    public void register(MetricsRegistry registry) throws MalformedObjectNameException {
         MetricNameFactory factory = new DefaultNameFactory("Cache", type);
 
-        capacity = APIMetrics.newGauge(factory.createMetricName("Capacity"),
+        registry.register(() -> registry.gauge(compose("capacity")), factory.createMetricName("Capacity"));
-                new Gauge<Long>() {
+        registry.register(() -> registry.meter(compose("hits_moving_avrage")), factory.createMetricName("Hits"));
-                    public Long value() {
+        registry.register(() -> registry.meter(compose("requests_moving_avrage")),
-                        return c.getLongValue("/cache_service/metrics/" + url
+                factory.createMetricName("Requests"));
-                                + "/capacity");
-                    }
-                });
-        hits = APIMetrics.newMeter("/cache_service/metrics/" + url
-                + "/hits", factory.createMetricName("Hits"), "hits",
-                TimeUnit.SECONDS);
-        requests = APIMetrics.newMeter("/cache_service/metrics/" + url
-                + "/requests", factory.createMetricName("Requests"),
-                "requests", TimeUnit.SECONDS);
-        hitRate = APIMetrics.newGauge(factory.createMetricName("HitRate"),
-                new Gauge<Double>() {
-                    @Override
-                    public Double value() {
-                        return c.getDoubleValue("/cache_service/metrics/" + url
-                                + "/hit_rate");
-                    }
-                });
-        size = APIMetrics.newGauge(factory.createMetricName("Size"),
-                new Gauge<Long>() {
-                    public Long value() {
-                        return c.getLongValue("/cache_service/metrics/" + url
-                                + "/size");
-                    }
-                });
-        entries = APIMetrics.newGauge(factory.createMetricName("Entries"),
-                new Gauge<Integer>() {
-                    public Integer value() {
-                        return c.getIntValue("/cache_service/metrics/" + url
-                                + "/entries");
-                    }
-                });
-    }
 
-    // for backward compatibility
+        registry.register(() -> registry.gauge(Double.class, compose("hit_rate")), factory.createMetricName("HitRate"));
-    @Deprecated
+        registry.register(() -> registry.gauge(compose("size")), factory.createMetricName("Size"));
-    public double getRecentHitRate() {
+        registry.register(() -> registry.gauge(Integer.class, compose("entries")), factory.createMetricName("Entries"));
-        long r = requests.count();
-        long h = hits.count();
-        try
-        {
-            return ((double)(h - lastHits.get())) / (r - lastRequests.get());
-        }
-        finally
-        {
-            lastRequests.set(r);
-            lastHits.set(h);
-        }
     }
-
 }

src/main/java/org/apache/cassandra/metrics/ClientRequestMetrics.java

@@ -27,51 +27,17 @@
 
 package org.apache.cassandra.metrics;
 
-import java.util.concurrent.TimeUnit;
+import javax.management.MalformedObjectNameException;
-
-import com.scylladb.jmx.metrics.APIMetrics;
-import com.scylladb.jmx.metrics.DefaultNameFactory;
-import com.yammer.metrics.Metrics;
-import com.yammer.metrics.core.Counter;
-import com.yammer.metrics.core.Meter;
 
 public class ClientRequestMetrics extends LatencyMetrics {
-    @Deprecated
+    public ClientRequestMetrics(String scope, String url) {
-    public static final Counter readTimeouts = Metrics
+        super("ClientRequest", scope, url);
-            .newCounter(DefaultNameFactory.createMetricName(
-                    "ClientRequestMetrics", "ReadTimeouts", null));
-    @Deprecated
-    public static final Counter writeTimeouts = Metrics
-            .newCounter(DefaultNameFactory.createMetricName(
-                    "ClientRequestMetrics", "WriteTimeouts", null));
-    @Deprecated
-    public static final Counter readUnavailables = Metrics
-            .newCounter(DefaultNameFactory.createMetricName(
-                    "ClientRequestMetrics", "ReadUnavailables", null));
-    @Deprecated
-    public static final Counter writeUnavailables = Metrics
-            .newCounter(DefaultNameFactory.createMetricName(
-                    "ClientRequestMetrics", "WriteUnavailables", null));
-
-    public final Meter timeouts;
-    public final Meter unavailables;
-
-    public ClientRequestMetrics(String url, String scope) {
-        super(url, "ClientRequest", scope);
-
-        timeouts = APIMetrics.newMeter(url + "/timeouts",
-                factory.createMetricName("Timeouts"), "timeouts",
-                TimeUnit.SECONDS);
-        unavailables = APIMetrics.newMeter(url + "/unavailables",
-                factory.createMetricName("Unavailables"), "unavailables",
-                TimeUnit.SECONDS);
     }
 
-    public void release() {
+    @Override
-        super.release();
+    public void register(MetricsRegistry registry) throws MalformedObjectNameException {
-        APIMetrics.defaultRegistry().removeMetric(
+        super.register(registry);
-                factory.createMetricName("Timeouts"));
+        registry.register(() -> registry.meter(uri + "/timeouts_rates"), names("Timeouts"));
-        APIMetrics.defaultRegistry().removeMetric(
+        registry.register(() -> registry.meter(uri + "/unavailables_rates"), names("Unavailables"));
-                factory.createMetricName("Unavailables"));
     }
 }

src/main/java/org/apache/cassandra/metrics/ColumnFamilyMetrics.java

@@ -1,576 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * Copyright 2015 Cloudius Systems
- *
- * Modified by Cloudius Systems
- */
-package org.apache.cassandra.metrics;
-
-import java.util.HashSet;
-import java.util.Set;
-import java.util.concurrent.ConcurrentMap;
-import java.util.concurrent.TimeUnit;
-
-import org.apache.cassandra.db.ColumnFamilyStore;
-
-import com.google.common.collect.Maps;
-import com.google.common.collect.Sets;
-import com.scylladb.jmx.api.APIClient;
-import com.scylladb.jmx.metrics.APIMetrics;
-import com.scylladb.jmx.metrics.MetricNameFactory;
-import com.scylladb.jmx.utils.RecentEstimatedHistogram;
-import com.yammer.metrics.Metrics;
-import com.yammer.metrics.core.*;
-
-/**
- * Metrics for {@link ColumnFamilyStore}.
- */
-public class ColumnFamilyMetrics {
-    private APIClient c = new APIClient();
-    /**
-     * Total amount of data stored in the memtable that resides on-heap,
-     * including column related overhead and overwritten rows.
-     */
-    public final Gauge<Long> memtableOnHeapSize;
-    /**
-     * Total amount of data stored in the memtable that resides off-heap,
-     * including column related overhead and overwritten rows.
-     */
-    public final Gauge<Long> memtableOffHeapSize;
-    /**
-     * Total amount of live data stored in the memtable, excluding any data
-     * structure overhead
-     */
-    public final Gauge<Long> memtableLiveDataSize;
-    /**
-     * Total amount of data stored in the memtables (2i and pending flush
-     * memtables included) that resides on-heap.
-     */
-    public final Gauge<Long> allMemtablesOnHeapSize;
-    /**
-     * Total amount of data stored in the memtables (2i and pending flush
-     * memtables included) that resides off-heap.
-     */
-    public final Gauge<Long> allMemtablesOffHeapSize;
-    /**
-     * Total amount of live data stored in the memtables (2i and pending flush
-     * memtables included) that resides off-heap, excluding any data structure
-     * overhead
-     */
-    public final Gauge<Long> allMemtablesLiveDataSize;
-    /** Total number of columns present in the memtable. */
-    public final Gauge<Long> memtableColumnsCount;
-    /** Number of times flush has resulted in the memtable being switched out. */
-    public final Counter memtableSwitchCount;
-    /** Current compression ratio for all SSTables */
-    public final Gauge<Double> compressionRatio;
-    /** Histogram of estimated row size (in bytes). */
-    public final Gauge<long[]> estimatedRowSizeHistogram;
-    /** Approximate number of keys in table. */
-    public final Gauge<Long> estimatedRowCount;
-    /** Histogram of estimated number of columns. */
-    public final Gauge<long[]> estimatedColumnCountHistogram;
-    /** Histogram of the number of sstable data files accessed per read */
-    public final ColumnFamilyHistogram sstablesPerReadHistogram;
-    /** (Local) read metrics */
-    public final LatencyMetrics readLatency;
-    /** (Local) range slice metrics */
-    public final LatencyMetrics rangeLatency;
-    /** (Local) write metrics */
-    public final LatencyMetrics writeLatency;
-    /** Estimated number of tasks pending for this column family */
-    public final Counter pendingFlushes;
-    /** Estimate of number of pending compactios for this CF */
-    public final Gauge<Integer> pendingCompactions;
-    /** Number of SSTables on disk for this CF */
-    public final Gauge<Integer> liveSSTableCount;
-    /** Disk space used by SSTables belonging to this CF */
-    public final Counter liveDiskSpaceUsed;
-    /**
-     * Total disk space used by SSTables belonging to this CF, including
-     * obsolete ones waiting to be GC'd
-     */
-    public final Counter totalDiskSpaceUsed;
-    /** Size of the smallest compacted row */
-    public final Gauge<Long> minRowSize;
-    /** Size of the largest compacted row */
-    public final Gauge<Long> maxRowSize;
-    /** Size of the smallest compacted row */
-    public final Gauge<Long> meanRowSize;
-    /** Number of false positives in bloom filter */
-    public final Gauge<Long> bloomFilterFalsePositives;
-    /** Number of false positives in bloom filter from last read */
-    public final Gauge<Long> recentBloomFilterFalsePositives;
-    /** False positive ratio of bloom filter */
-    public final Gauge<Double> bloomFilterFalseRatio;
-    /** False positive ratio of bloom filter from last read */
-    public final Gauge<Double> recentBloomFilterFalseRatio;
-    /** Disk space used by bloom filter */
-    public final Gauge<Long> bloomFilterDiskSpaceUsed;
-    /** Off heap memory used by bloom filter */
-    public final Gauge<Long> bloomFilterOffHeapMemoryUsed;
-    /** Off heap memory used by index summary */
-    public final Gauge<Long> indexSummaryOffHeapMemoryUsed;
-    /** Off heap memory used by compression meta data */
-    public final Gauge<Long> compressionMetadataOffHeapMemoryUsed;
-    /** Key cache hit rate for this CF */
-    public final Gauge<Double> keyCacheHitRate;
-    /** Tombstones scanned in queries on this CF */
-    public final ColumnFamilyHistogram tombstoneScannedHistogram;
-    /** Live cells scanned in queries on this CF */
-    public final ColumnFamilyHistogram liveScannedHistogram;
-    /** Column update time delta on this CF */
-    public final ColumnFamilyHistogram colUpdateTimeDeltaHistogram;
-    /** Disk space used by snapshot files which */
-    public final Gauge<Long> trueSnapshotsSize;
-    /** Row cache hits, but result out of range */
-    public final Counter rowCacheHitOutOfRange;
-    /** Number of row cache hits */
-    public final Counter rowCacheHit;
-    /** Number of row cache misses */
-    public final Counter rowCacheMiss;
-    /** CAS Prepare metrics */
-    public final LatencyMetrics casPrepare;
-    /** CAS Propose metrics */
-    public final LatencyMetrics casPropose;
-    /** CAS Commit metrics */
-    public final LatencyMetrics casCommit;
-
-    public final Timer coordinatorReadLatency;
-    public final Timer coordinatorScanLatency;
-
-    /** Time spent waiting for free memtable space, either on- or off-heap */
-    public final Timer waitingOnFreeMemtableSpace;
-
-    private final MetricNameFactory factory;
-    private static final MetricNameFactory globalNameFactory = new AllColumnFamilyMetricNameFactory();
-
-    public final Counter speculativeRetries;
-
-    // for backward compatibility
-    @Deprecated
-    public final EstimatedHistogramWrapper sstablesPerRead;
-    // it should not be called directly
-    @Deprecated
-    protected final RecentEstimatedHistogram recentSSTablesPerRead = new RecentEstimatedHistogram(35);
-    private String cfName;
-
-    public final static LatencyMetrics globalReadLatency = new LatencyMetrics(
-            "/column_family/metrics/read_latency", globalNameFactory, "Read");
-    public final static LatencyMetrics globalWriteLatency = new LatencyMetrics(
-            "/column_family/metrics/write_latency", globalNameFactory, "Write");
-    public final static LatencyMetrics globalRangeLatency = new LatencyMetrics(
-            "/column_family/metrics/range_latency", globalNameFactory, "Range");
-
-    /**
-     * stores metrics that will be rolled into a single global metric
-     */
-    public final static ConcurrentMap<String, Set<Metric>> allColumnFamilyMetrics = Maps
-            .newConcurrentMap();
-
-    /**
-     * Stores all metric names created that can be used when unregistering
-     */
-    public final static Set<String> all = Sets.newHashSet();
-
-    /**
-     * Creates metrics for given {@link ColumnFamilyStore}.
-     *
-     * @param cfs
-     *            ColumnFamilyStore to measure metrics
-     */
-    public ColumnFamilyMetrics(final ColumnFamilyStore cfs) {
-        factory = new ColumnFamilyMetricNameFactory(cfs);
-        cfName = cfs.getCFName();
-        memtableColumnsCount = createColumnFamilyGauge(
-                "/column_family/metrics/memtable_columns_count",
-                "MemtableColumnsCount");
-        memtableOnHeapSize = createColumnFamilyGauge(
-                "/column_family/metrics/memtable_on_heap_size",
-                "MemtableOnHeapSize");
-        memtableOffHeapSize = createColumnFamilyGauge(
-                "/column_family/metrics/memtable_off_heap_size",
-                "MemtableOffHeapSize");
-        memtableLiveDataSize = createColumnFamilyGauge(
-                "/column_family/metrics/memtable_live_data_size",
-                "MemtableLiveDataSize");
-        allMemtablesOnHeapSize = createColumnFamilyGauge(
-                "/column_family/metrics/all_memtables_on_heap_size",
-                "AllMemtablesHeapSize");
-        allMemtablesOffHeapSize = createColumnFamilyGauge(
-                "/column_family/metrics/all_memtables_off_heap_size",
-                "AllMemtablesOffHeapSize");
-        allMemtablesLiveDataSize = createColumnFamilyGauge(
-                "/column_family/metrics/all_memtables_live_data_size",
-                "AllMemtablesLiveDataSize");
-        memtableSwitchCount = createColumnFamilyCounter(
-                "/column_family/metrics/memtable_switch_count",
-                "MemtableSwitchCount");
-        estimatedRowSizeHistogram = Metrics.newGauge(
-                factory.createMetricName("EstimatedRowSizeHistogram"),
-                new Gauge<long[]>() {
-                    public long[] value() {
-                        return c.getEstimatedHistogramAsLongArrValue("/column_family/metrics/estimated_row_size_histogram/"
-                                + cfName);
-                    }
-                });
-        estimatedRowCount= Metrics.newGauge(
-                factory.createMetricName("EstimatedRowCount"),
-                new Gauge<Long>() {
-                    public Long value() {
-                        return c.getLongValue("/column_family/metrics/estimated_row_count/"
-                                + cfName);
-                    }
-                });
-
-        estimatedColumnCountHistogram = Metrics.newGauge(
-                factory.createMetricName("EstimatedColumnCountHistogram"),
-                new Gauge<long[]>() {
-                    public long[] value() {
-                        return c.getEstimatedHistogramAsLongArrValue("/column_family/metrics/estimated_column_count_histogram/"
-                                + cfName);
-                    }
-                });
-        sstablesPerReadHistogram = createColumnFamilyHistogram(
-                "/column_family/metrics/sstables_per_read_histogram",
-                "SSTablesPerReadHistogram");
-        compressionRatio = createColumnFamilyGauge("CompressionRatio",
-                new Gauge<Double>() {
-                    public Double value() {
-                        return c.getDoubleValue("/column_family/metrics/compression_ratio/"
-                                + cfName);
-                    }
-                }, new Gauge<Double>() // global gauge
-                {
-                    public Double value() {
-                        return c.getDoubleValue("/column_family/metrics/compression_ratio/");
-                    }
-                });
-        readLatency = new LatencyMetrics("/column_family/metrics/read_latency",
-                cfName, factory, "Read");
-        writeLatency = new LatencyMetrics(
-                "/column_family/metrics/write_latency", cfName, factory,
-                "Write");
-        rangeLatency = new LatencyMetrics(
-                "/column_family/metrics/range_latency", cfName, factory,
-                "Range");
-        pendingFlushes = createColumnFamilyCounter(
-                "/column_family/metrics/pending_flushes", "PendingFlushes");
-        pendingCompactions = createColumnFamilyGaugeInt(
-                "/column_family/metrics/pending_compactions",
-                "PendingCompactions");
-        liveSSTableCount = createColumnFamilyGaugeInt(
-                "/column_family/metrics/live_ss_table_count",
-                "LiveSSTableCount");
-        liveDiskSpaceUsed = createColumnFamilyCounter(
-                "/column_family/metrics/live_disk_space_used",
-                "LiveDiskSpaceUsed");
-        totalDiskSpaceUsed = createColumnFamilyCounter(
-                "/column_family/metrics/total_disk_space_used",
-                "TotalDiskSpaceUsed");
-        minRowSize = createColumnFamilyGauge(
-                "/column_family/metrics/min_row_size", "MinRowSize");
-        maxRowSize = createColumnFamilyGauge(
-                "/column_family/metrics/max_row_size", "MaxRowSize");
-        meanRowSize = createColumnFamilyGauge(
-                "/column_family/metrics/mean_row_size", "MeanRowSize");
-        bloomFilterFalsePositives = createColumnFamilyGauge(
-                "/column_family/metrics/bloom_filter_false_positives",
-                "BloomFilterFalsePositives");
-        recentBloomFilterFalsePositives = createColumnFamilyGauge(
-                "/column_family/metrics/recent_bloom_filter_false_positives",
-                "RecentBloomFilterFalsePositives");
-        bloomFilterFalseRatio = createColumnFamilyGaugeDouble(
-                "/column_family/metrics/bloom_filter_false_ratio",
-                "BloomFilterFalseRatio");
-        recentBloomFilterFalseRatio = createColumnFamilyGaugeDouble(
-                "/column_family/metrics/recent_bloom_filter_false_ratio",
-                "RecentBloomFilterFalseRatio");
-        bloomFilterDiskSpaceUsed = createColumnFamilyGauge(
-                "/column_family/metrics/bloom_filter_disk_space_used",
-                "BloomFilterDiskSpaceUsed");
-        bloomFilterOffHeapMemoryUsed = createColumnFamilyGauge(
-                "/column_family/metrics/bloom_filter_off_heap_memory_used",
-                "BloomFilterOffHeapMemoryUsed");
-        indexSummaryOffHeapMemoryUsed = createColumnFamilyGauge(
-                "/column_family/metrics/index_summary_off_heap_memory_used",
-                "IndexSummaryOffHeapMemoryUsed");
-        compressionMetadataOffHeapMemoryUsed = createColumnFamilyGauge(
-                "/column_family/metrics/compression_metadata_off_heap_memory_used",
-                "CompressionMetadataOffHeapMemoryUsed");
-        speculativeRetries = createColumnFamilyCounter(
-                "/column_family/metrics/speculative_retries",
-                "SpeculativeRetries");
-        keyCacheHitRate = Metrics.newGauge(
-                factory.createMetricName("KeyCacheHitRate"),
-                new Gauge<Double>() {
-                    @Override
-                    public Double value() {
-                        return c.getDoubleValue("/column_family/metrics/key_cache_hit_rate/"
-                                + cfName);
-                    }
-                });
-        tombstoneScannedHistogram = createColumnFamilyHistogram(
-                "/column_family/metrics/tombstone_scanned_histogram",
-                "TombstoneScannedHistogram");
-        liveScannedHistogram = createColumnFamilyHistogram(
-                "/column_family/metrics/live_scanned_histogram",
-                "LiveScannedHistogram");
-        colUpdateTimeDeltaHistogram = createColumnFamilyHistogram(
-                "/column_family/metrics/col_update_time_delta_histogram",
-                "ColUpdateTimeDeltaHistogram");
-        coordinatorReadLatency = APIMetrics.newTimer("/column_family/metrics/coordinator/read/" + cfName,
-                factory.createMetricName("CoordinatorReadLatency"),
-                TimeUnit.MICROSECONDS, TimeUnit.SECONDS);
-        coordinatorScanLatency = APIMetrics.newTimer("/column_family/metrics/coordinator/scan/" + cfName,
-                factory.createMetricName("CoordinatorScanLatency"),
-                TimeUnit.MICROSECONDS, TimeUnit.SECONDS);
-        waitingOnFreeMemtableSpace = APIMetrics.newTimer("/column_family/metrics/waiting_on_free_memtable/" + cfName,
-                factory.createMetricName("WaitingOnFreeMemtableSpace"),
-                TimeUnit.MICROSECONDS, TimeUnit.SECONDS);
-
-        trueSnapshotsSize = createColumnFamilyGauge(
-                "/column_family/metrics/snapshots_size", "SnapshotsSize");
-        rowCacheHitOutOfRange = createColumnFamilyCounter(
-                "/column_family/metrics/row_cache_hit_out_of_range",
-                "RowCacheHitOutOfRange");
-        rowCacheHit = createColumnFamilyCounter(
-                "/column_family/metrics/row_cache_hit", "RowCacheHit");
-        rowCacheMiss = createColumnFamilyCounter(
-                "/column_family/metrics/row_cache_miss", "RowCacheMiss");
-
-        casPrepare = new LatencyMetrics("/column_family/metrics/cas_prepare/"
-                + cfName, factory, "CasPrepare");
-        casPropose = new LatencyMetrics("/column_family/metrics/cas_propose/"
-                + cfName, factory, "CasPropose");
-        casCommit = new LatencyMetrics("/column_family/metrics/cas_commit/"
-                + cfName, factory, "CasCommit");
-        sstablesPerRead = new EstimatedHistogramWrapper("/column_family/metrics/sstables_per_read_histogram/" + cfName);
-    }
-
-    /**
-     * Release all associated metrics.
-     */
-    public void release() {
-        for (String name : all) {
-            allColumnFamilyMetrics.get(name).remove(
-                    Metrics.defaultRegistry().allMetrics()
-                            .get(factory.createMetricName(name)));
-            Metrics.defaultRegistry().removeMetric(
-                    factory.createMetricName(name));
-        }
-        readLatency.release();
-        writeLatency.release();
-        rangeLatency.release();
-        Metrics.defaultRegistry().removeMetric(
-                factory.createMetricName("EstimatedRowSizeHistogram"));
-        Metrics.defaultRegistry().removeMetric(
-                factory.createMetricName("EstimatedColumnCountHistogram"));
-        Metrics.defaultRegistry().removeMetric(
-                factory.createMetricName("KeyCacheHitRate"));
-        Metrics.defaultRegistry().removeMetric(
-                factory.createMetricName("CoordinatorReadLatency"));
-        Metrics.defaultRegistry().removeMetric(
-                factory.createMetricName("CoordinatorScanLatency"));
-        Metrics.defaultRegistry().removeMetric(
-                factory.createMetricName("WaitingOnFreeMemtableSpace"));
-    }
-
-    /**
-     * Create a gauge that will be part of a merged version of all column
-     * families. The global gauge will merge each CF gauge by adding their
-     * values
-     */
-    protected Gauge<Double> createColumnFamilyGaugeDouble(final String url,
-            final String name) {
-        Gauge<Double> gauge = new Gauge<Double>() {
-            public Double value() {
-                return c.getDoubleValue(url + "/" + cfName);
-            }
-        };
-        return createColumnFamilyGauge(url, name, gauge);
-    }
-
-    /**
-     * Create a gauge that will be part of a merged version of all column
-     * families. The global gauge will merge each CF gauge by adding their
-     * values
-     */
-    protected Gauge<Long> createColumnFamilyGauge(final String url, final String name) {
-        Gauge<Long> gauge = new Gauge<Long>() {
-            public Long value() {
-                return (long)c.getDoubleValue(url + "/" + cfName);
-            }
-        };
-        return createColumnFamilyGauge(url, name, gauge);
-    }
-
-    /**
-     * Create a gauge that will be part of a merged version of all column
-     * families. The global gauge will merge each CF gauge by adding their
-     * values
-     */
-    protected Gauge<Integer> createColumnFamilyGaugeInt(final String url,
-            final String name) {
-        Gauge<Integer> gauge = new Gauge<Integer>() {
-            public Integer value() {
-                return (int)c.getDoubleValue(url + "/" + cfName);
-            }
-        };
-        return createColumnFamilyGauge(url, name, gauge);
-    }
-
-    /**
-     * Create a gauge that will be part of a merged version of all column
-     * families. The global gauge will merge each CF gauge by adding their
-     * values
-     */
-    protected <T extends Number> Gauge<T> createColumnFamilyGauge(final String url,
-            final String name, Gauge<T> gauge) {
-        return createColumnFamilyGauge(name, gauge, new Gauge<Long>() {
-            public Long value() {
-                // This is an optimiztion, call once for all column families
-                // instead
-                // of iterating over all of them
-                return c.getLongValue(url);
-            }
-        });
-    }
-
-    /**
-     * Create a gauge that will be part of a merged version of all column
-     * families. The global gauge is defined as the globalGauge parameter
-     */
-    protected <G, T> Gauge<T> createColumnFamilyGauge(String name,
-            Gauge<T> gauge, Gauge<G> globalGauge) {
-        Gauge<T> cfGauge = APIMetrics.newGauge(factory.createMetricName(name),
-                gauge);
-        if (register(name, cfGauge)) {
-            Metrics.newGauge(globalNameFactory.createMetricName(name),
-                    globalGauge);
-        }
-        return cfGauge;
-    }
-
-    /**
-     * Creates a counter that will also have a global counter thats the sum of
-     * all counters across different column families
-     */
-    protected Counter createColumnFamilyCounter(final String url, final String name) {
-        Counter cfCounter = APIMetrics.newCounter(url + "/" + cfName,
-                factory.createMetricName(name));
-        if (register(name, cfCounter)) {
-            Metrics.newGauge(globalNameFactory.createMetricName(name),
-                    new Gauge<Long>() {
-                        public Long value() {
-                            // This is an optimiztion, call once for all column
-                            // families instead
-                            // of iterating over all of them
-                            return c.getLongValue(url);
-                        }
-                    });
-        }
-        return cfCounter;
-    }
-
-    /**
-     * Create a histogram-like interface that will register both a CF, keyspace
-     * and global level histogram and forward any updates to both
-     */
-    protected ColumnFamilyHistogram createColumnFamilyHistogram(String url,
-            String name) {
-        Histogram cfHistogram = APIMetrics.newHistogram(url + "/" + cfName,
-                factory.createMetricName(name), true);
-        register(name, cfHistogram);
-
-        // TBD add keyspace and global histograms
-        // keyspaceHistogram,
-        // Metrics.newHistogram(globalNameFactory.createMetricName(name),
-        // true));
-        return new ColumnFamilyHistogram(cfHistogram, null, null);
-    }
-
-    /**
-     * Registers a metric to be removed when unloading CF.
-     *
-     * @return true if first time metric with that name has been registered
-     */
-    private boolean register(String name, Metric metric) {
-        boolean ret = allColumnFamilyMetrics.putIfAbsent(name,
-                new HashSet<Metric>()) == null;
-        allColumnFamilyMetrics.get(name).add(metric);
-        all.add(name);
-        return ret;
-    }
-
-    public long[] getRecentSSTablesPerRead() {
-        return recentSSTablesPerRead
-                .getBuckets(sstablesPerRead.getBuckets(false));
-    }
-
-    public class ColumnFamilyHistogram {
-        public final Histogram[] all;
-        public final Histogram cf;
-
-        private ColumnFamilyHistogram(Histogram cf, Histogram keyspace,
-                Histogram global) {
-            this.cf = cf;
-            this.all = new Histogram[] { cf, keyspace, global };
-        }
-    }
-
-    class ColumnFamilyMetricNameFactory implements MetricNameFactory {
-        private final String keyspaceName;
-        private final String columnFamilyName;
-        private final boolean isIndex;
-
-        ColumnFamilyMetricNameFactory(ColumnFamilyStore cfs) {
-            this.keyspaceName = cfs.getKeyspace();
-            this.columnFamilyName = cfs.getColumnFamilyName();
-            isIndex = cfs.isIndex();
-        }
-
-        public MetricName createMetricName(String metricName) {
-            String groupName = ColumnFamilyMetrics.class.getPackage().getName();
-            String type = isIndex ? "IndexColumnFamily" : "ColumnFamily";
-
-            StringBuilder mbeanName = new StringBuilder();
-            mbeanName.append(groupName).append(":");
-            mbeanName.append("type=").append(type);
-            mbeanName.append(",keyspace=").append(keyspaceName);
-            mbeanName.append(",scope=").append(columnFamilyName);
-            mbeanName.append(",name=").append(metricName);
-            return new MetricName(groupName, type, metricName, keyspaceName
-                    + "." + columnFamilyName, mbeanName.toString());
-        }
-    }
-
-    static class AllColumnFamilyMetricNameFactory implements MetricNameFactory {
-        public MetricName createMetricName(String metricName) {
-            String groupName = ColumnFamilyMetrics.class.getPackage().getName();
-            StringBuilder mbeanName = new StringBuilder();
-            mbeanName.append(groupName).append(":");
-            mbeanName.append("type=ColumnFamily");
-            mbeanName.append(",name=").append(metricName);
-            return new MetricName(groupName, "ColumnFamily", metricName, "all",
-                    mbeanName.toString());
-        }
-    }
-}

src/main/java/org/apache/cassandra/metrics/CommitLogMetrics.java

@@ -23,65 +23,38 @@
  */
 package org.apache.cassandra.metrics;
 
-import com.scylladb.jmx.api.APIClient;
+import javax.management.MalformedObjectNameException;
-import com.scylladb.jmx.metrics.APIMetrics;
-import com.scylladb.jmx.metrics.DefaultNameFactory;
-import com.scylladb.jmx.metrics.MetricNameFactory;
-import com.yammer.metrics.core.Gauge;
-import com.yammer.metrics.core.Timer;
-
-import java.util.concurrent.TimeUnit;
 
 /**
  * Metrics for commit log
  */
-public class CommitLogMetrics {
+public class CommitLogMetrics implements Metrics {
-    public static final MetricNameFactory factory = new DefaultNameFactory(
-            "CommitLog");
-    private APIClient c = new APIClient();
-
-    /** Number of completed tasks */
-    public final Gauge<Long> completedTasks;
-    /** Number of pending tasks */
-    public final Gauge<Long> pendingTasks;
-    /** Current size used by all the commit log segments */
-    public final Gauge<Long> totalCommitLogSize;
-    /**
-     * Time spent waiting for a CLS to be allocated - under normal conditions
-     * this should be zero
-     */
-    public final Timer waitingOnSegmentAllocation;
-    /**
-     * The time spent waiting on CL sync; for Periodic this is only occurs when
-     * the sync is lagging its sync interval
-     */
-    public final Timer waitingOnCommit;
-
     public CommitLogMetrics() {
-        completedTasks = APIMetrics.newGauge(
+    }
-                factory.createMetricName("CompletedTasks"), new Gauge<Long>() {
+
-                    public Long value() {
+    @Override
-                        return c.getLongValue("/commitlog/metrics/completed_tasks");
+    public void register(MetricsRegistry registry) throws MalformedObjectNameException {
-                    }
+        MetricNameFactory factory = new DefaultNameFactory("CommitLog");
-                });
+        /** Number of completed tasks */
-        pendingTasks = APIMetrics.newGauge(
+        registry.register(() -> registry.gauge("/commitlog/metrics/completed_tasks"),
-                factory.createMetricName("PendingTasks"), new Gauge<Long>() {
+                factory.createMetricName("CompletedTasks"));
-                    public Long value() {
+        /** Number of pending tasks */
-                        return c.getLongValue("/commitlog/metrics/pending_tasks");
+        registry.register(() -> registry.gauge("/commitlog/metrics/pending_tasks"),
-                    }
+                factory.createMetricName("PendingTasks"));
-                });
+        /** Current size used by all the commit log segments */
-        totalCommitLogSize = APIMetrics.newGauge(
+        registry.register(() -> registry.gauge("/commitlog/metrics/total_commit_log_size"),
-                factory.createMetricName("TotalCommitLogSize"),
+                factory.createMetricName("TotalCommitLogSize"));
-                new Gauge<Long>() {
+        /**
-                    public Long value() {
+         * Time spent waiting for a CLS to be allocated - under normal
-                        return c.getLongValue("/commitlog/metrics/total_commit_log_size");
+         * conditions this should be zero
-                    }
+         */
-                });
+        registry.register(() -> registry.timer("/commitlog/metrics/waiting_on_segment_allocation"),
-        waitingOnSegmentAllocation = APIMetrics.newTimer("/commit_log/metrics/waiting_on_segment_allocation",
+                factory.createMetricName("WaitingOnSegmentAllocation"));
-                factory.createMetricName("WaitingOnSegmentAllocation"),
+        /**
-                TimeUnit.MICROSECONDS, TimeUnit.SECONDS);
+         * The time spent waiting on CL sync; for Periodic this is only occurs
-        waitingOnCommit = APIMetrics.newTimer("/commit_log/metrics/waiting_on_commit",
+         * when the sync is lagging its sync interval
-                factory.createMetricName("WaitingOnCommit"),
+         */
-                TimeUnit.MICROSECONDS, TimeUnit.SECONDS);
+        registry.register(() -> registry.timer("/commitlog/metrics/waiting_on_commit"),
+                factory.createMetricName("WaitingOnCommit"));
     }
 }

src/main/java/org/apache/cassandra/metrics/CompactionMetrics.java

@@ -23,52 +23,54 @@
  */
 package org.apache.cassandra.metrics;
 
-import java.util.concurrent.TimeUnit;
+import jakarta.json.JsonArray;
+import jakarta.json.JsonObject;
+import java.util.HashMap;
+import java.util.Map;
 
-import com.scylladb.jmx.api.APIClient;
+import javax.management.MalformedObjectNameException;
-import com.scylladb.jmx.metrics.APIMetrics;
-import com.scylladb.jmx.metrics.DefaultNameFactory;
-import com.scylladb.jmx.metrics.MetricNameFactory;
-import com.yammer.metrics.core.Counter;
-import com.yammer.metrics.core.Gauge;
-import com.yammer.metrics.core.Meter;
 
 /**
  * Metrics for compaction.
  */
-public class CompactionMetrics {
+public class CompactionMetrics implements Metrics {
-    public static final MetricNameFactory factory = new DefaultNameFactory(
-            "Compaction");
-    private APIClient c = new APIClient();
-    /** Estimated number of compactions remaining to perform */
-    public final Gauge<Integer> pendingTasks;
-    /** Number of completed compactions since server [re]start */
-    public final Gauge<Long> completedTasks;
-    /** Total number of compactions since server [re]start */
-    public final Meter totalCompactionsCompleted;
-    /** Total number of bytes compacted since server [re]start */
-    public final Counter bytesCompacted;
-
     public CompactionMetrics() {
+    }
 
-        pendingTasks = APIMetrics.newGauge(
+    @Override
-                factory.createMetricName("PendingTasks"), new Gauge<Integer>() {
+    public void register(MetricsRegistry registry) throws MalformedObjectNameException {
-                    public Integer value() {
+        MetricNameFactory factory = new DefaultNameFactory("Compaction");
-                        return c.getIntValue("/compaction_manager/metrics/pending_tasks");
+        /** Estimated number of compactions remaining to perform */
-                    }
+        registry.register(() -> registry.gauge(Integer.class, "/compaction_manager/metrics/pending_tasks"),
-                });
+                factory.createMetricName("PendingTasks"));
-        completedTasks = APIMetrics.newGauge(
+        /** Number of completed compactions since server [re]start */
-                factory.createMetricName("CompletedTasks"), new Gauge<Long>() {
+        registry.register(() -> registry.gauge("/compaction_manager/metrics/completed_tasks"),
-                    public Long value() {
+                factory.createMetricName("CompletedTasks"));
-                        return c.getLongValue("/compaction_manager/metrics/completed_tasks");
+        /** Total number of compactions since server [re]start */
-                    }
+        registry.register(() -> registry.meter("/compaction_manager/metrics/total_compactions_completed"),
-                });
+                factory.createMetricName("TotalCompactionsCompleted"));
-        totalCompactionsCompleted = APIMetrics.newMeter(
+        /** Total number of bytes compacted since server [re]start */
-                "/compaction_manager/metrics/total_compactions_completed",
+        registry.register(() -> registry.meter("/compaction_manager/metrics/bytes_compacted"),
-                factory.createMetricName("TotalCompactionsCompleted"),
-                "compaction completed", TimeUnit.SECONDS);
-        bytesCompacted = APIMetrics.newCounter(
-                "/compaction_manager/metrics/bytes_compacted",
                 factory.createMetricName("BytesCompacted"));
+
+        registry.register(() -> registry.gauge((client) -> {
+            Map<String, Map<String, Integer>> result = new HashMap<>();
+            JsonArray compactions = client.getJsonArray("compaction_manager/metrics/pending_tasks_by_table");
+
+            for (int i = 0; i < compactions.size(); i++) {
+                JsonObject c = compactions.getJsonObject(i);
+
+                String ks = c.getString("ks");
+                String cf = c.getString("cf");
+
+                if (!result.containsKey(ks)) {
+                    result.put(ks, new HashMap<>());
+                }
+
+                Map<String, Integer> map = result.get(ks);
+                map.put(cf, (int)(c.getJsonNumber("task").longValue()));
+            }
+            return result;
+        }), factory.createMetricName("PendingTasksByTableName"));
     }
 }

src/main/java/org/apache/cassandra/metrics/DefaultNameFactory.java

@@ -15,15 +15,10 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+package org.apache.cassandra.metrics;
 
-/*
+import javax.management.MalformedObjectNameException;
- * Copyright 2015 Cloudius Systems
+import javax.management.ObjectName;
- *
- * Modified by Cloudius Systems
- */
-package com.scylladb.jmx.metrics;
-
-import com.yammer.metrics.core.MetricName;
 
 /**
  * MetricNameFactory that generates default MetricName of metrics.
@@ -43,19 +38,14 @@ public class DefaultNameFactory implements MetricNameFactory {
         this.scope = scope;
     }
 
-    public MetricName createMetricName(String metricName) {
+    @Override
+    public ObjectName createMetricName(String metricName) throws MalformedObjectNameException {
         return createMetricName(type, metricName, scope);
     }
 
-    public static MetricName createMetricName(String type, String metricName,
+    public static ObjectName createMetricName(String type, String name, String scope)
-            String scope) {
+            throws MalformedObjectNameException {
-        return new MetricName(GROUP_NAME, type, metricName, scope,
+        StringBuilder nameBuilder = new StringBuilder();
-                createDefaultMBeanName(type, metricName, scope));
-    }
-
-    protected static String createDefaultMBeanName(String type, String name,
-            String scope) {
-        final StringBuilder nameBuilder = new StringBuilder();
         nameBuilder.append(GROUP_NAME);
         nameBuilder.append(":type=");
         nameBuilder.append(type);
@@ -67,6 +57,6 @@ public class DefaultNameFactory implements MetricNameFactory {
             nameBuilder.append(",name=");
             nameBuilder.append(name);
         }
-        return nameBuilder.toString();
+        return new ObjectName(nameBuilder.toString());
     }
 }

src/main/java/org/apache/cassandra/metrics/DroppedMessageMetrics.java

@@ -24,42 +24,27 @@
 
 package org.apache.cassandra.metrics;
 
-import java.util.concurrent.TimeUnit;
+import javax.management.MalformedObjectNameException;
 
 import org.apache.cassandra.net.MessagingService;
 
-import com.scylladb.jmx.metrics.APIMetrics;
-import com.scylladb.jmx.metrics.DefaultNameFactory;
-import com.scylladb.jmx.metrics.MetricNameFactory;
-import com.yammer.metrics.core.APISettableMeter;
-
 /**
  * Metrics for dropped messages by verb.
  */
-public class DroppedMessageMetrics {
+public class DroppedMessageMetrics implements Metrics {
-    /** Number of dropped messages */
+    private final MessagingService.Verb verb;
-    public final APISettableMeter dropped;
-
-    private long lastDropped = 0;
 
     public DroppedMessageMetrics(MessagingService.Verb verb) {
-        MetricNameFactory factory = new DefaultNameFactory("DroppedMessage",
+        this.verb = verb;
-                verb.toString());
-        dropped = (APISettableMeter) APIMetrics.newSettableMeter(
-                factory.createMetricName("Dropped"), "dropped",
-                TimeUnit.SECONDS);
-        dropped.stop();
     }
 
-    @Deprecated
+    @Override
-    public int getRecentlyDropped() {
+    public void register(MetricsRegistry registry) throws MalformedObjectNameException {
-        long currentDropped = dropped.count();
+        MetricNameFactory factory = new DefaultNameFactory("DroppedMessage", verb.toString());
-        long recentlyDropped = currentDropped - lastDropped;
+        /** Number of dropped messages */
-        lastDropped = currentDropped;
+        // TODO: this API url does not exist. Add meter calls for verbs.
-        return (int) recentlyDropped;
+        registry.register(() -> registry.meter("/messaging_service/messages/dropped/" + verb),
-    }
+                factory.createMetricName("Dropped"));
 
-    public APISettableMeter getMeter() {
-        return dropped;
     }
 }

src/main/java/org/apache/cassandra/metrics/EstimatedHistogramWrapper.java

@@ -1,55 +0,0 @@
-package org.apache.cassandra.metrics;
-/*
- * Copyright (C) 2015 ScyllaDB
- */
-
-/*
- * This file is part of Scylla.
- *
- * Scylla is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Scylla is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Scylla.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-import javax.ws.rs.core.MultivaluedMap;
-
-import com.scylladb.jmx.api.APIClient;
-import com.scylladb.jmx.utils.EstimatedHistogram;
-
-public class EstimatedHistogramWrapper {
-    private APIClient c = new APIClient();
-    private String url;
-    private MultivaluedMap<String, String> queryParams;
-    private static final int DURATION = 50;
-    private int duration;
-    public EstimatedHistogramWrapper(String url, MultivaluedMap<String, String> queryParams, int duration) {
-        this.url = url;
-        this.queryParams = queryParams;
-        this.duration = duration;
-
-    }
-    public EstimatedHistogramWrapper(String url) {
-        this(url, null, DURATION);
-
-    }
-    public EstimatedHistogramWrapper(String url, int duration) {
-        this(url, null, duration);
-
-    }
-    public EstimatedHistogram get() {
-        return c.getEstimatedHistogram(url, queryParams, duration);
-    }
-
-    public long[] getBuckets(boolean reset) {
-        return get().getBuckets(reset);
-    }
-}

src/main/java/org/apache/cassandra/metrics/LatencyMetrics.java

@@ -23,41 +23,19 @@
  */
 package org.apache.cassandra.metrics;
 
-import java.util.List;
+import java.util.Arrays;
-import java.util.concurrent.TimeUnit;
 
-import com.google.common.collect.ImmutableList;
+import javax.management.MalformedObjectNameException;
-import com.google.common.collect.Lists;
+import javax.management.ObjectName;
-import com.scylladb.jmx.metrics.APIMetrics;
-import com.scylladb.jmx.metrics.DefaultNameFactory;
-import com.scylladb.jmx.metrics.MetricNameFactory;
-import com.scylladb.jmx.utils.RecentEstimatedHistogram;
-import com.yammer.metrics.core.Counter;
-import com.yammer.metrics.core.Timer;
 
 /**
  * Metrics about latencies
  */
-public class LatencyMetrics {
+public class LatencyMetrics implements Metrics {
-    /** Latency */
+    protected final MetricNameFactory[] factories;
-    public final Timer latency;
-    /** Total latency in micro sec */
-    public final Counter totalLatency;
-
-    /** parent metrics to replicate any updates to **/
-    private List<LatencyMetrics> parents = Lists.newArrayList();
-
-    protected final MetricNameFactory factory;
     protected final String namePrefix;
-
+    protected final String uri;
-    @Deprecated public EstimatedHistogramWrapper totalLatencyHistogram;
+    protected final String param;
-    /*
-     * It should not be called directly, use the getRecentLatencyHistogram
-     */
-    @Deprecated protected final RecentEstimatedHistogram recentLatencyHistogram = new RecentEstimatedHistogram();
-
-    protected long lastLatency;
-    protected long lastOpCount;
 
     /**
      * Create LatencyMetrics with given group, type, and scope. Name prefix for
@@ -68,8 +46,8 @@ public class LatencyMetrics {
      * @param scope
      *            Scope
      */
-    public LatencyMetrics(String url, String type, String scope) {
+    public LatencyMetrics(String type, String scope, String uri) {
-        this(url, type, "", scope);
+        this(type, "", scope, uri, null);
     }
 
     /**
@@ -83,88 +61,35 @@ public class LatencyMetrics {
      * @param scope
      *            Scope of metrics
      */
-    public LatencyMetrics(String url, String type, String namePrefix,
+    public LatencyMetrics(String type, String namePrefix, String scope, String uri, String param) {
-            String scope) {
+        this(namePrefix, uri, param, new DefaultNameFactory(type, scope));
-        this(url, new DefaultNameFactory(type, scope), namePrefix);
     }
 
-    /**
+    public LatencyMetrics(String namePrefix, String uri, MetricNameFactory... factories) {
-     * Create LatencyMetrics with given group, type, prefix to append to each
+        this(namePrefix, uri, null, factories);
-     * metric name, and scope.
-     *
-     * @param factory
-     *            MetricName factory to use
-     * @param namePrefix
-     *            Prefix to append to each metric name
-     */
-    public LatencyMetrics(String url, MetricNameFactory factory,
-            String namePrefix) {
-        this(url, null, factory, namePrefix);
     }
 
-    public LatencyMetrics(String url, String paramName,
+    public LatencyMetrics(String namePrefix, String uri, String param, MetricNameFactory... factories) {
-            MetricNameFactory factory, String namePrefix) {
+        this.factories = factories;
-        this.factory = factory;
         this.namePrefix = namePrefix;
-
+        this.uri = uri;
-        paramName = (paramName == null)? "" : "/" + paramName;
+        this.param = param;
-        latency = APIMetrics.newTimer(url + "/histogram" + paramName,
-                factory.createMetricName(namePrefix + "Latency"),
-                TimeUnit.MICROSECONDS, TimeUnit.SECONDS);
-        totalLatency = APIMetrics.newCounter(url +  paramName,
-                factory.createMetricName(namePrefix + "TotalLatency"));
-        totalLatencyHistogram = new EstimatedHistogramWrapper(url + "/estimated_histogram" + paramName);
     }
 
-    /**
+    protected ObjectName[] names(String suffix) throws MalformedObjectNameException {
-     * Create LatencyMetrics with given group, type, prefix to append to each
+        return Arrays.stream(factories).map(f -> {
-     * metric name, and scope. Any updates to this will also run on parent
+            try {
-     *
+                return f.createMetricName(namePrefix + suffix);
-     * @param factory
+            } catch (MalformedObjectNameException e) {
-     *            MetricName factory to use
+                throw new RuntimeException(e); // dung...
-     * @param namePrefix
+            }
-     *            Prefix to append to each metric name
+        }).toArray(size -> new ObjectName[size]);
-     * @param parents
-     *            any amount of parents to replicate updates to
-     */
-    public LatencyMetrics(String url, MetricNameFactory factory,
-            String namePrefix, LatencyMetrics... parents) {
-        this(url, factory, namePrefix);
-        this.parents.addAll(ImmutableList.copyOf(parents));
     }
 
-    /** takes nanoseconds **/
+    @Override
-    public void addNano(long nanos) {
+    public void register(MetricsRegistry registry) throws MalformedObjectNameException {
-        // convert to microseconds. 1 millionth
+        String paramName = (param == null) ? "" : "/" + param;
-        latency.update(nanos, TimeUnit.NANOSECONDS);
+        registry.register(() -> registry.timer(uri + "/moving_average_histogram" + paramName), names("Latency"));
-        totalLatency.inc(nanos / 1000);
+        registry.register(() -> registry.counter(uri + paramName), names("TotalLatency"));
-        for (LatencyMetrics parent : parents) {
-            parent.addNano(nanos);
-        }
-    }
-
-    public void release() {
-        APIMetrics.defaultRegistry()
-                .removeMetric(factory.createMetricName(namePrefix + "Latency"));
-        APIMetrics.defaultRegistry().removeMetric(
-                factory.createMetricName(namePrefix + "TotalLatency"));
-    }
-
-    @Deprecated
-    public synchronized double getRecentLatency() {
-        long ops = latency.count();
-        long n = totalLatency.count();
-        if (ops == lastOpCount)
-            return 0;
-        try {
-            return ((double) n - lastLatency) / (ops - lastOpCount);
-        } finally {
-            lastLatency = n;
-            lastOpCount = ops;
-        }
-    }
-
-    public long[] getRecentLatencyHistogram() {
-        return recentLatencyHistogram.getBuckets(totalLatencyHistogram.getBuckets(false));
     }
 }

src/main/java/org/apache/cassandra/metrics/MetricNameFactory.java

@@ -15,23 +15,26 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-/*
+package org.apache.cassandra.metrics;
- * Copyright 2015 Cloudius Systems
+
+import javax.management.MalformedObjectNameException;
+import javax.management.ObjectName;
+
+/**
+ * Simplified version of {@link Metrics} naming factory paradigm, simply
+ * generating {@link ObjectName} and nothing more.
+ * 
+ * @author calle
  *
- * Modified by Cloudius Systems
  */
-
+public interface MetricNameFactory {
-package com.scylladb.jmx.metrics;
-
-import com.yammer.metrics.core.MetricName;
-
-public interface MetricNameFactory
-{
     /**
      * Create a qualified name from given metric name.
      *
-     * @param metricName part of qualified name.
+     * @param metricName
+     *            part of qualified name.
      * @return new String with given metric name.
+     * @throws MalformedObjectNameException
      */
-    MetricName createMetricName(String metricName);
+    ObjectName createMetricName(String metricName) throws MalformedObjectNameException;
 }

src/main/java/org/apache/cassandra/metrics/Metrics.java

@@ -0,0 +1,38 @@
+package org.apache.cassandra.metrics;
+
+import java.util.function.Function;
+
+import javax.management.MBeanServer;
+import javax.management.MalformedObjectNameException;
+
+/**
+ * Action interface for any type that encapsulates n metrics.
+ * 
+ * @author calle
+ *
+ */
+public interface Metrics {
+    /**
+     * Implementors should issue
+     * {@link MetricsRegistry#register(java.util.function.Supplier, javax.management.ObjectName...)}
+     * for every {@link Metrics} they generate. This method is called in both
+     * bind (create) and unbind (remove) phase, so an appropriate use of
+     * {@link Function} binding is advisable.
+     * 
+     * @param registry
+     * @throws MalformedObjectNameException
+     */
+    void register(MetricsRegistry registry) throws MalformedObjectNameException;
+
+    /**
+     * Same as {{@link #register(MetricsRegistry)}, but for {@link Metric}s that
+     * are "global" (i.e. static - not bound to an individual bean instance.
+     * This method is called whenever the first encapsulating MBean is
+     * added/removed from a {@link MBeanServer}.
+     * 
+     * @param registry
+     * @throws MalformedObjectNameException
+     */
+    default void registerGlobals(MetricsRegistry registry) throws MalformedObjectNameException {
+    }
+}

src/main/java/org/apache/cassandra/metrics/MetricsRegistry.java

@@ -0,0 +1,813 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.cassandra.metrics;
+
+import static com.scylladb.jmx.api.APIClient.getReader;
+import static java.lang.Math.floor;
+import static java.util.logging.Level.SEVERE;
+
+import jakarta.json.JsonArray;
+import jakarta.json.JsonNumber;
+import jakarta.json.JsonObject;
+import java.util.Arrays;
+import java.util.Locale;
+import java.util.concurrent.TimeUnit;
+import java.util.function.BiFunction;
+import java.util.function.Function;
+import java.util.function.Supplier;
+import java.util.logging.Logger;
+
+import javax.management.InstanceAlreadyExistsException;
+import javax.management.MBeanRegistrationException;
+import javax.management.MBeanServer;
+import javax.management.NotCompliantMBeanException;
+import javax.management.ObjectName;
+
+import com.scylladb.jmx.api.APIClient;
+import com.sun.jmx.mbeanserver.JmxMBeanServer;
+
+/**
+ * Makes integrating 3.0 metrics API with 2.0.
+ * <p>
+ * The 3.0 API comes with poor JMX integration
+ * </p>
+ */
+public class MetricsRegistry {
+    private static final long CACHE_DURATION = 1000;
+    private static final long UPDATE_INTERVAL = 50;
+
+    private static final Logger logger = Logger.getLogger(MetricsRegistry.class.getName());
+
+    private final APIClient client;
+    private final JmxMBeanServer mBeanServer;
+
+    public MetricsRegistry(APIClient client, JmxMBeanServer mBeanServer) {
+        this.client = client;
+        this.mBeanServer = mBeanServer;
+    }
+
+    public MetricsRegistry(MetricsRegistry other) {
+        this(other.client, other.mBeanServer);
+    }
+
+    public MetricMBean gauge(String url) {
+        return gauge(Long.class, url);
+    }
+
+    public <T> MetricMBean gauge(Class<T> type, final String url) {
+        return gauge(getReader(type), url);
+    }
+
+    public <T> MetricMBean gauge(final BiFunction<APIClient, String, T> function, final String url) {
+        return gauge(c -> function.apply(c, url));
+    }
+
+    public <T> MetricMBean gauge(final Function<APIClient, T> function) {
+        return gauge(() -> function.apply(client));
+    }
+
+    private class JmxGauge implements JmxGaugeMBean {
+        private final Supplier<?> function;
+
+        public JmxGauge(Supplier<?> function) {
+            this.function = function;
+        }
+
+        @Override
+        public Object getValue() {
+            return function.get();
+        }
+    }
+
+    public <T> MetricMBean gauge(final Supplier<T> function) {
+        return new JmxGauge(function);
+    }
+
+    /**
+     * Default approach to register is to actually register/add to
+     * {@link MBeanServer} For unbind phase, override here.
+     * 
+     * @param bean
+     * @param objectNames
+     */
+    public void register(Supplier<MetricMBean> f, ObjectName... objectNames) {
+        MetricMBean bean = f.get();
+        for (ObjectName name : objectNames) {
+            try {
+                mBeanServer.getMBeanServerInterceptor().registerMBean(bean, name);
+            } catch (InstanceAlreadyExistsException | MBeanRegistrationException | NotCompliantMBeanException e) {
+                logger.log(SEVERE, "Could not register mbean", e);
+            }
+        }
+    }
+
+    private class JmxCounter implements JmxCounterMBean {
+        private final String url;
+
+        public JmxCounter(String url) {
+            super();
+            this.url = url;
+        }
+
+        @Override
+        public long getCount() {
+            return client.getLongValue(url);
+        }
+    }
+
+    public MetricMBean counter(final String url) {
+        if (url != null) {
+            return new JmxCounter(url);
+        }
+        return new JmxCounter(url) {
+            @Override
+            public long getCount() {
+                return 0;
+            }
+        };
+    }
+
+    private abstract class IntermediatelyUpdated {
+        private final long interval;
+        private final Supplier<JsonObject> supplier;
+        private long lastUpdate;
+
+        public IntermediatelyUpdated(String url, long interval) {
+            this.supplier = () -> client.getJsonObj(url, null);
+            this.interval = interval;
+        }
+
+        public IntermediatelyUpdated(Supplier<JsonObject> supplier, long interval) {
+            this.supplier = supplier;
+            this.interval = interval;
+        }
+
+        public abstract void update(JsonObject obj);
+
+        public final void update() {
+            long now = System.currentTimeMillis();
+            if (now - lastUpdate < interval) {
+                return;
+            }
+            try {
+                JsonObject obj = supplier.get();
+                update(obj);
+            } finally {
+                lastUpdate = now;
+            }
+        }
+    }
+
+    private static class Meter {
+        public final long count;
+        public final double oneMinuteRate;
+        public final double fiveMinuteRate;
+        public final double fifteenMinuteRate;
+        public final double meanRate;
+
+        public Meter(long count, double oneMinuteRate, double fiveMinuteRate, double fifteenMinuteRate,
+                double meanRate) {
+            this.count = count;
+            this.oneMinuteRate = oneMinuteRate;
+            this.fiveMinuteRate = fiveMinuteRate;
+            this.fifteenMinuteRate = fifteenMinuteRate;
+            this.meanRate = meanRate;
+        }
+
+        public Meter() {
+            this(0, 0, 0, 0, 0);
+        }
+
+        public Meter(JsonObject obj) {
+            JsonArray rates = obj.getJsonArray("rates");
+            oneMinuteRate = rates.getJsonNumber(0).doubleValue();
+            fiveMinuteRate = rates.getJsonNumber(1).doubleValue();
+            fifteenMinuteRate = rates.getJsonNumber(2).doubleValue();
+            meanRate = obj.getJsonNumber("mean_rate").doubleValue();
+            count = obj.getJsonNumber("count").longValue();
+        }
+    }
+
+    private static final TimeUnit RATE_UNIT = TimeUnit.SECONDS;
+    private static final TimeUnit DURATION_UNIT = TimeUnit.MICROSECONDS;
+    private static final TimeUnit API_DURATION_UNIT = TimeUnit.MICROSECONDS;
+    private static final double DURATION_FACTOR = 1.0 / API_DURATION_UNIT.convert(1, DURATION_UNIT);
+
+    private static double toDuration(double micro) {
+        return micro * DURATION_FACTOR;
+    }
+
+    private static String unitString(TimeUnit u) {
+        String s = u.toString().toLowerCase(Locale.US);
+        return s.substring(0, s.length() - 1);
+    }
+
+    private class JmxMeter extends IntermediatelyUpdated implements JmxMeterMBean {
+        private Meter meter = new Meter();
+
+        public JmxMeter(String url, long interval) {
+            super(url, interval);
+        }
+
+        public JmxMeter(Supplier<JsonObject> supplier, long interval) {
+            super(supplier, interval);
+        }
+
+        @Override
+        public void update(JsonObject obj) {
+            meter = new Meter(obj);
+        }
+
+        @Override
+        public long getCount() {
+            update();
+            return meter.count;
+        }
+
+        @Override
+        public double getMeanRate() {
+            update();
+            return meter.meanRate;
+        }
+
+        @Override
+        public double getOneMinuteRate() {
+            update();
+            return meter.oneMinuteRate;
+        }
+
+        @Override
+        public double getFiveMinuteRate() {
+            update();
+            return meter.fiveMinuteRate;
+        }
+
+        @Override
+        public double getFifteenMinuteRate() {
+            update();
+            return meter.fifteenMinuteRate;
+        }
+
+        @Override
+        public String getRateUnit() {
+            return "event/" + unitString(RATE_UNIT);
+        }
+    }
+
+    public MetricMBean meter(String url) {
+        return new JmxMeter(url, CACHE_DURATION);
+    }
+
+    private static long[] asLongArray(JsonArray a) {
+        return a.getValuesAs(JsonNumber.class).stream().mapToLong(n -> n.longValue()).toArray();
+    }
+
+    private static interface Samples {
+        default double getValue(double quantile) {
+            return 0;
+        }
+
+        default long[] getValues() {
+            return new long[0];
+        }
+    }
+
+    private static class BufferSamples implements Samples {
+        private final long[] samples;
+
+        public BufferSamples(long[] samples) {
+            this.samples = samples;
+            Arrays.sort(this.samples);
+        }
+
+        @Override
+        public long[] getValues() {
+            return samples;
+        }
+
+        @Override
+        public double getValue(double quantile) {
+            if (quantile < 0.0 || quantile > 1.0) {
+                throw new IllegalArgumentException(quantile + " is not in [0..1]");
+            }
+
+            if (samples.length == 0) {
+                return 0.0;
+            }
+
+            final double pos = quantile * (samples.length + 1);
+
+            if (pos < 1) {
+                return samples[0];
+            }
+
+            if (pos >= samples.length) {
+                return samples[samples.length - 1];
+            }
+
+            final double lower = samples[(int) pos - 1];
+            final double upper = samples[(int) pos];
+            return lower + (pos - floor(pos)) * (upper - lower);
+        }
+    }
+
+    private static class Histogram {
+        private final long count;
+        private final long min;
+        private final long max;
+        private final double mean;
+        private final double stdDev;
+
+        private final Samples samples;
+
+        public Histogram(long count, long min, long max, double mean, double stdDev, Samples samples) {
+            this.count = count;
+            this.min = min;
+            this.max = max;
+            this.mean = mean;
+            this.stdDev = stdDev;
+            this.samples = samples;
+        }
+
+        public Histogram() {
+            this(0, 0, 0, 0, 0, new Samples() {
+            });
+        }
+
+        public Histogram(JsonObject obj) {
+            this(obj.getJsonNumber("count").longValue(), obj.getJsonNumber("min").longValue(),
+                    obj.getJsonNumber("max").longValue(), obj.getJsonNumber("mean").doubleValue(),
+                    obj.getJsonNumber("variance").doubleValue(), new BufferSamples(getValues(obj)));
+        }
+
+        public Histogram(EstimatedHistogram h) {
+            this(h.count(), h.min(), h.max(), h.mean(), 0, h);
+        }
+
+        private static long[] getValues(JsonObject obj) {
+            JsonArray arr = obj.getJsonArray("sample");
+            if (arr != null) {
+                return asLongArray(arr);
+            }
+            return new long[0];
+        }
+
+        public long[] getValues() {
+            return samples.getValues();
+        }
+
+        // Origin (and previous iterations of scylla-jxm)
+        // uses biased/ExponentiallyDecaying measurements
+        // for the history & quantile resolution.
+        // However, for use that is just gobbletigook, since
+        // we, at occasions of being asked, and when certain time
+        // has passed, ask the actual scylla server for a
+        // "values" buffer. A buffer with no information whatsoever
+        // on how said values correlate to actual sampling
+        // time.
+        // So, applying time weights at this level is just
+        // wrong. We can just as well treat this as a uniform
+        // distribution.
+        // Obvious improvement: Send time/value tuples instead.
+        public double getValue(double quantile) {
+            return samples.getValue(quantile);
+        }
+
+        public long getCount() {
+            return count;
+        }
+
+        public long getMin() {
+            return min;
+        }
+
+        public long getMax() {
+            return max;
+        }
+
+        public double getMean() {
+            return mean;
+        }
+
+        public double getStdDev() {
+            return stdDev;
+        }
+    }
+
+    private static class EstimatedHistogram implements Samples {
+        /**
+         * The series of values to which the counts in `buckets` correspond: 1,
+         * 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 17, 20, etc. Thus, a `buckets` of
+         * [0, 0, 1, 10] would mean we had seen one value of 3 and 10 values of
+         * 4.
+         *
+         * The series starts at 1 and grows by 1.2 each time (rounding and
+         * removing duplicates). It goes from 1 to around 36M by default
+         * (creating 90+1 buckets), which will give us timing resolution from
+         * microseconds to 36 seconds, with less precision as the numbers get
+         * larger.
+         *
+         * Each bucket represents values from (previous bucket offset, current
+         * offset].
+         */
+        private final long[] bucketOffsets;
+        // buckets is one element longer than bucketOffsets -- the last element
+        // is
+        // values greater than the last offset
+        private long[] buckets;
+
+        public EstimatedHistogram(JsonObject obj) {
+            this(asLongArray(obj.getJsonArray("bucket_offsets")), asLongArray(obj.getJsonArray("buckets")));
+        }
+
+        public EstimatedHistogram(long[] offsets, long[] bucketData) {
+            assert bucketData.length == offsets.length + 1;
+            bucketOffsets = offsets;
+            buckets = bucketData;
+        }
+
+        /**
+         * @return the smallest value that could have been added to this
+         *         histogram
+         */
+        public long min() {
+            for (int i = 0; i < buckets.length; i++) {
+                if (buckets[i] > 0) {
+                    return i == 0 ? 0 : 1 + bucketOffsets[i - 1];
+                }
+            }
+            return 0;
+        }
+
+        /**
+         * @return the largest value that could have been added to this
+         *         histogram. If the histogram overflowed, returns
+         *         Long.MAX_VALUE.
+         */
+        public long max() {
+            int lastBucket = buckets.length - 1;
+            if (buckets[lastBucket] > 0) {
+                return Long.MAX_VALUE;
+            }
+
+            for (int i = lastBucket - 1; i >= 0; i--) {
+                if (buckets[i] > 0) {
+                    return bucketOffsets[i];
+                }
+            }
+            return 0;
+        }
+
+        @Override
+        public long[] getValues() {
+            return buckets;
+        }
+
+        /**
+         * @param percentile
+         * @return estimated value at given percentile
+         */
+        @Override
+        public double getValue(double percentile) {
+            assert percentile >= 0 && percentile <= 1.0;
+            int lastBucket = buckets.length - 1;
+            if (buckets[lastBucket] > 0) {
+                throw new IllegalStateException("Unable to compute when histogram overflowed");
+            }
+
+            long pcount = (long) Math.floor(count() * percentile);
+            if (pcount == 0) {
+                return 0;
+            }
+
+            long elements = 0;
+            for (int i = 0; i < lastBucket; i++) {
+                elements += buckets[i];
+                if (elements >= pcount) {
+                    return bucketOffsets[i];
+                }
+            }
+            return 0;
+        }
+
+        /**
+         * @return the mean histogram value (average of bucket offsets, weighted
+         *         by count)
+         * @throws IllegalStateException
+         *             if any values were greater than the largest bucket
+         *             threshold
+         */
+        public long mean() {
+            int lastBucket = buckets.length - 1;
+            if (buckets[lastBucket] > 0) {
+                throw new IllegalStateException("Unable to compute ceiling for max when histogram overflowed");
+            }
+
+            long elements = 0;
+            long sum = 0;
+            for (int i = 0; i < lastBucket; i++) {
+                long bCount = buckets[i];
+                elements += bCount;
+                sum += bCount * bucketOffsets[i];
+            }
+
+            return (long) Math.ceil((double) sum / elements);
+        }
+
+        /**
+         * @return the total number of non-zero values
+         */
+        public long count() {
+            return Arrays.stream(buckets).sum();
+        }
+
+        /**
+         * @return true if this histogram has overflowed -- that is, a value
+         *         larger than our largest bucket could bound was added
+         */
+        @SuppressWarnings("unused")
+        public boolean isOverflowed() {
+            return buckets[buckets.length - 1] > 0;
+        }
+
+    }
+
+    private class JmxHistogram extends IntermediatelyUpdated implements JmxHistogramMBean {
+        private Histogram histogram = new Histogram();
+
+        public JmxHistogram(String url, long interval) {
+            super(url, interval);
+        }
+
+        @Override
+        public void update(JsonObject obj) {
+            if (obj.containsKey("hist")) {
+                obj = obj.getJsonObject("hist");
+            }
+            if (obj.containsKey("buckets")) {
+                histogram = new Histogram(new EstimatedHistogram(obj));
+            } else {
+                histogram = new Histogram(obj);
+            }
+        }
+
+        @Override
+        public long getCount() {
+            update();
+            return histogram.getCount();
+        }
+
+        @Override
+        public long getMin() {
+            update();
+            return histogram.getMin();
+        }
+
+        @Override
+        public long getMax() {
+            update();
+            return histogram.getMax();
+        }
+
+        @Override
+        public double getMean() {
+            update();
+            return histogram.getMean();
+        }
+
+        @Override
+        public double getStdDev() {
+            update();
+            return histogram.getStdDev();
+        }
+
+        @Override
+        public double get50thPercentile() {
+            update();
+            return histogram.getValue(.5);
+        }
+
+        @Override
+        public double get75thPercentile() {
+            update();
+            return histogram.getValue(.75);
+        }
+
+        @Override
+        public double get95thPercentile() {
+            update();
+            return histogram.getValue(.95);
+        }
+
+        @Override
+        public double get98thPercentile() {
+            update();
+            return histogram.getValue(.98);
+        }
+
+        @Override
+        public double get99thPercentile() {
+            update();
+            return histogram.getValue(.99);
+        }
+
+        @Override
+        public double get999thPercentile() {
+            update();
+            return histogram.getValue(.999);
+        }
+
+        @Override
+        public long[] values() {
+            update();
+            return histogram.getValues();
+        }
+    }
+
+    public MetricMBean histogram(String url, boolean considerZeroes) {
+        return new JmxHistogram(url, UPDATE_INTERVAL);
+    }
+
+    private class JmxTimer extends JmxMeter implements JmxTimerMBean {
+        private Histogram histogram = new Histogram();
+
+        public JmxTimer(String url, long interval) {
+            super(url, interval);
+        }
+
+        @Override
+        public void update(JsonObject obj) {
+            // TODO: this is not atomic.
+            super.update(obj.getJsonObject("meter"));
+            histogram = new Histogram(obj.getJsonObject("hist"));
+        }
+
+        @Override
+        public double getMin() {
+            update();
+            return toDuration(histogram.getMin());
+        }
+
+        @Override
+        public double getMax() {
+            update();
+            return toDuration(histogram.getMax());
+        }
+
+        @Override
+        public double getMean() {
+            update();
+            return toDuration(histogram.getMean());
+        }
+
+        @Override
+        public double getStdDev() {
+            update();
+            return toDuration(histogram.getStdDev());
+        }
+
+        @Override
+        public double get50thPercentile() {
+            update();
+            return toDuration(histogram.getValue(.5));
+        }
+
+        @Override
+        public double get75thPercentile() {
+            update();
+            return toDuration(histogram.getValue(.75));
+        }
+
+        @Override
+        public double get95thPercentile() {
+            update();
+            return toDuration(histogram.getValue(.95));
+        }
+
+        @Override
+        public double get98thPercentile() {
+            update();
+            return toDuration(histogram.getValue(.98));
+        }
+
+        @Override
+        public double get99thPercentile() {
+            update();
+            return toDuration(histogram.getValue(.99));
+        }
+
+        @Override
+        public double get999thPercentile() {
+            update();
+            return toDuration(histogram.getValue(.999));
+        }
+
+        @Override
+        public long[] values() {
+            update();
+            return histogram.getValues();
+        }
+
+        @Override
+        public String getDurationUnit() {
+            update();
+            return DURATION_UNIT.toString().toLowerCase(Locale.US);
+        }
+    }
+
+    public MetricMBean timer(String url) {
+        return new JmxTimer(url, UPDATE_INTERVAL);
+    }
+
+    public interface MetricMBean {
+    }
+
+    public static interface JmxGaugeMBean extends MetricMBean {
+        Object getValue();
+    }
+
+    public interface JmxHistogramMBean extends MetricMBean {
+        long getCount();
+
+        long getMin();
+
+        long getMax();
+
+        double getMean();
+
+        double getStdDev();
+
+        double get50thPercentile();
+
+        double get75thPercentile();
+
+        double get95thPercentile();
+
+        double get98thPercentile();
+
+        double get99thPercentile();
+
+        double get999thPercentile();
+
+        long[] values();
+    }
+
+    public interface JmxCounterMBean extends MetricMBean {
+        long getCount();
+    }
+
+    public interface JmxMeterMBean extends MetricMBean {
+        long getCount();
+
+        double getMeanRate();
+
+        double getOneMinuteRate();
+
+        double getFiveMinuteRate();
+
+        double getFifteenMinuteRate();
+
+        String getRateUnit();
+    }
+
+    public interface JmxTimerMBean extends JmxMeterMBean {
+        double getMin();
+
+        double getMax();
+
+        double getMean();
+
+        double getStdDev();
+
+        double get50thPercentile();
+
+        double get75thPercentile();
+
+        double get95thPercentile();
+
+        double get98thPercentile();
+
+        double get99thPercentile();
+
+        double get999thPercentile();
+
+        long[] values();
+
+        String getDurationUnit();
+    }
+}

src/main/java/org/apache/cassandra/metrics/StorageMetrics.java

@@ -23,27 +23,21 @@
  */
 package org.apache.cassandra.metrics;
 
-import com.scylladb.jmx.metrics.APIMetrics;
+import javax.management.MalformedObjectNameException;
-import com.scylladb.jmx.metrics.DefaultNameFactory;
-import com.scylladb.jmx.metrics.MetricNameFactory;
-import com.yammer.metrics.core.Counter;
 
 /**
  * Metrics related to Storage.
  */
-public class StorageMetrics {
+public class StorageMetrics implements Metrics {
-    private static final MetricNameFactory factory = new DefaultNameFactory(
+    @Override
-            "Storage");
+    public void register(MetricsRegistry registry) throws MalformedObjectNameException {
-
+        MetricNameFactory factory = new DefaultNameFactory("Storage");
-    public static final Counter load = APIMetrics.newCounter(
+        registry.register(() -> registry.counter("/storage_service/metrics/load"), factory.createMetricName("Load"));
-            "/storage_service/metrics/load", factory.createMetricName("Load"));
+        registry.register(() -> registry.counter("/storage_service/metrics/exceptions"),
-    public static final Counter exceptions = APIMetrics.newCounter(
+                factory.createMetricName("Exceptions"));
-            "/storage_service/metrics/exceptions",
+        registry.register(() -> registry.counter("/storage_service/metrics/hints_in_progress"),
-            factory.createMetricName("Exceptions"));
+                factory.createMetricName("TotalHintsInProgress"));
-    public static final Counter totalHintsInProgress = APIMetrics.newCounter(
+        registry.register(() -> registry.counter("/storage_service/metrics/total_hints"),
-            "/storage_service/metrics/hints_in_progress",
+                factory.createMetricName("TotalHints"));
-            factory.createMetricName("TotalHintsInProgress"));
+    }
-    public static final Counter totalHints = APIMetrics.newCounter(
-            "/storage_service/metrics/total_hints",
-            factory.createMetricName("TotalHints"));
 }

src/main/java/org/apache/cassandra/metrics/StreamingMetrics.java

@@ -23,79 +23,89 @@
  */
 package org.apache.cassandra.metrics;
 
-import java.net.InetAddress;
+import static java.util.Arrays.asList;
-import java.util.HashMap;
+import static org.apache.cassandra.metrics.DefaultNameFactory.createMetricName;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-import java.util.Timer;
-import java.util.TimerTask;
 
-import javax.json.JsonArray;
+import jakarta.json.JsonArray;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.EnumSet;
+import java.util.HashSet;
+import java.util.Set;
+
+import javax.management.MalformedObjectNameException;
+import javax.management.ObjectName;
+import javax.management.OperationsException;
 
 import com.scylladb.jmx.api.APIClient;
-import com.scylladb.jmx.metrics.APIMetrics;
+import com.scylladb.jmx.metrics.APIMBean;
-import com.scylladb.jmx.metrics.DefaultNameFactory;
+import com.scylladb.jmx.metrics.RegistrationChecker;
-import com.scylladb.jmx.metrics.MetricNameFactory;
+import com.scylladb.jmx.metrics.RegistrationMode;
-import com.yammer.metrics.core.Counter;
+import com.sun.jmx.mbeanserver.JmxMBeanServer;
 
 /**
  * Metrics for streaming.
  */
-public class StreamingMetrics
+public class StreamingMetrics {
-{
     public static final String TYPE_NAME = "Streaming";
-    private static final Map<String, StreamingMetrics> instances = new HashMap<String, StreamingMetrics>();
-    static final int INTERVAL = 1000; //update every 1second
 
-    private static Timer timer = new Timer("Streaming Metrics");
+    private static final HashSet<ObjectName> globalNames;
 
-    public static final Counter activeStreamsOutbound = APIMetrics.newCounter("/stream_manager/metrics/outbound", DefaultNameFactory.createMetricName(TYPE_NAME, "ActiveOutboundStreams", null));
+    static {
-    public static final Counter totalIncomingBytes = APIMetrics.newCounter("/stream_manager/metrics/incoming", DefaultNameFactory.createMetricName(TYPE_NAME, "TotalIncomingBytes", null));
+        try {
-    public static final Counter totalOutgoingBytes = APIMetrics.newCounter("/stream_manager/metrics/outgoing", DefaultNameFactory.createMetricName(TYPE_NAME, "TotalOutgoingBytes", null));
+            globalNames = new HashSet<ObjectName>(asList(createMetricName(TYPE_NAME, "ActiveOutboundStreams", null),
-    public final Counter incomingBytes;
+                    createMetricName(TYPE_NAME, "TotalIncomingBytes", null),
-    public final Counter outgoingBytes;
+                    createMetricName(TYPE_NAME, "TotalOutgoingBytes", null)));
-
+        } catch (MalformedObjectNameException e) {
-    public static void register_mbeans() {
+            throw new Error(e);
-        TimerTask taskToExecute = new CheckRegistration();
-        timer.scheduleAtFixedRate(taskToExecute, 100, INTERVAL);
-    }
-
-    public StreamingMetrics(final InetAddress peer)
-    {
-        MetricNameFactory factory = new DefaultNameFactory("Streaming", peer.getHostAddress().replaceAll(":", "."));
-        incomingBytes = APIMetrics.newCounter("/stream_manager/metrics/incoming/" + peer,factory.createMetricName("IncomingBytes"));
-        outgoingBytes= APIMetrics.newCounter("/stream_manager/metrics/outgoing/" + peer, factory.createMetricName("OutgoingBytes"));
-    }
-
-    private static final class CheckRegistration extends TimerTask {
-        private APIClient c = new APIClient();
-
-        @Override
-        public void run() {
-            try {
-                JsonArray streams = c.getJsonArray("/stream_manager/");
-                Set<String> all = new HashSet<String>();
-                for (int i = 0; i < streams.size(); i ++) {
-                    JsonArray sessions = streams.getJsonObject(i).getJsonArray("sessions");
-                    for (int j = 0; j < sessions.size(); j++) {
-                        String name = sessions.getJsonObject(j).getString("peer");
-                        if (!instances.containsKey(name)) {
-                            StreamingMetrics metrics = new StreamingMetrics(InetAddress.getByName(name));
-                            instances.put(name, metrics);
-                        }
-                        all.add(name);
-                    }
-                }
-                //removing deleted stream
-                for (String n : instances.keySet()) {
-                    if (! all.contains(n)) {
-                        instances.remove(n);
-                    }
-                }
-            } catch (Exception e) {
-                // ignoring exceptions, will retry on the next interval
-            }
         }
+    };
+
+    private StreamingMetrics() {
     }
+
+    private static boolean isStreamingName(ObjectName n) {
+        return TYPE_NAME.equals(n.getKeyProperty("type"));
+    }
+    
+	public static RegistrationChecker createRegistrationChecker() {
+		return new RegistrationChecker() {			
+			@Override
+			protected void doCheck(APIClient client, JmxMBeanServer server, EnumSet<RegistrationMode> mode) throws OperationsException, UnknownHostException {
+				Set<ObjectName> all = new HashSet<ObjectName>(globalNames);
+				JsonArray streams = client.getJsonArray("/stream_manager/");
+				for (int i = 0; i < streams.size(); i++) {
+					JsonArray sessions = streams.getJsonObject(i).getJsonArray("sessions");
+					for (int j = 0; j < sessions.size(); j++) {
+						String peer = sessions.getJsonObject(j).getString("peer");
+						String scope = InetAddress.getByName(peer).getHostAddress().replaceAll(":", ".");
+						all.add(createMetricName(TYPE_NAME, "IncomingBytes", scope));
+						all.add(createMetricName(TYPE_NAME, "OutgoingBytes", scope));
+					}
+				}
+
+				MetricsRegistry registry = new MetricsRegistry(client, server);
+				APIMBean.checkRegistration(server, all, mode, StreamingMetrics::isStreamingName, n -> {
+					String scope = n.getKeyProperty("scope");
+					String name = n.getKeyProperty("name");
+
+					String url = null;
+					if ("ActiveOutboundStreams".equals(name)) {
+						url = "/stream_manager/metrics/outbound";
+					} else if ("IncomingBytes".equals(name) || "TotalIncomingBytes".equals(name)) {
+						url = "/stream_manager/metrics/incoming";
+					} else if ("OutgoingBytes".equals(name) || "TotalOutgoingBytes".equals(name)) {
+						url = "/stream_manager/metrics/outgoing";
+					}
+					if (url == null) {
+						throw new IllegalArgumentException();
+					}
+					if (scope != null) {
+						url = url + "/" + scope;
+					}
+					return registry.counter(url);
+				});
+			}
+		};
+	}
 }

src/main/java/org/apache/cassandra/metrics/TableMetrics.java

@@ -0,0 +1,553 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.cassandra.metrics;
+
+import static com.scylladb.jmx.api.APIClient.getReader;
+
+import java.io.InvalidObjectException;
+import java.io.ObjectStreamException;
+import java.util.Hashtable;
+import java.util.function.BiFunction;
+import java.util.function.Function;
+import java.util.function.Supplier;
+
+import javax.management.MalformedObjectNameException;
+import javax.management.ObjectName;
+
+import org.apache.cassandra.db.ColumnFamilyStore;
+
+import com.scylladb.jmx.api.APIClient;
+
+/**
+ * Metrics for {@link ColumnFamilyStore}.
+ */
+public class TableMetrics implements Metrics {
+    private final MetricNameFactory factory;
+    private final MetricNameFactory aliasFactory;
+    private static final MetricNameFactory globalFactory = new AllTableMetricNameFactory("Table");
+    private static final MetricNameFactory globalAliasFactory = new AllTableMetricNameFactory("ColumnFamily");
+    private static final LatencyMetrics globalLatency[] = new LatencyMetrics[] {
+            new LatencyMetrics("Read", compose("read_latency"), globalFactory, globalAliasFactory),
+            new LatencyMetrics("Write", compose("read_latency"), globalFactory, globalAliasFactory),
+            new LatencyMetrics("Range", compose("read_latency"), globalFactory, globalAliasFactory), };
+
+    private final String cfName;
+    private final LatencyMetrics latencyMetrics[];
+
+    public TableMetrics(String keyspace, String columnFamily, boolean isIndex) {
+        this.factory = new TableMetricNameFactory(keyspace, columnFamily, isIndex, "Table");
+        this.aliasFactory = new TableMetricNameFactory(keyspace, columnFamily, isIndex, "ColumnFamily");
+        this.cfName = keyspace + ":" + columnFamily;
+
+        latencyMetrics = new LatencyMetrics[] {
+                new LatencyMetrics("Read", compose("read_latency"), cfName, factory, aliasFactory),
+                new LatencyMetrics("Write", compose("write_latency"), cfName, factory, aliasFactory),
+                new LatencyMetrics("Range", compose("range_latency"), cfName, factory, aliasFactory),
+
+                new LatencyMetrics("CasPrepare", compose("cas_prepare"), cfName, factory, aliasFactory),
+                new LatencyMetrics("CasPropose", compose("cas_propose"), cfName, factory, aliasFactory),
+                new LatencyMetrics("CasCommit", compose("cas_commit"), cfName, factory, aliasFactory), };
+    }
+
+    @Override
+    public void register(MetricsRegistry registry) throws MalformedObjectNameException {
+        Registry r = new Registry(registry, factory, aliasFactory, cfName);
+        registerCommon(r);
+        registerLocal(r);
+    }
+
+    @Override
+    public void registerGlobals(MetricsRegistry registry) throws MalformedObjectNameException {
+        Registry r = new Registry(registry, globalFactory, globalAliasFactory, null);
+        registerCommon(r);
+        for (LatencyMetrics l : globalLatency) {
+            l.register(registry);
+        }
+    }
+
+    private static String compose(String base, String name) {
+        String s = "/column_family/metrics/" + base;
+        return name != null ? s + "/" + name : s;
+    }
+
+    private static String compose(String base) {
+        return compose(base, null);
+    }
+
+    /**
+     * Creates metrics for given {@link ColumnFamilyStore}.
+     *
+     * @param cfs
+     *            ColumnFamilyStore to measure metrics
+     */
+    static class Registry extends MetricsRegistry {
+        @SuppressWarnings("unused")
+        private Function<APIClient, Long> newGauge(final String url) {
+            return newGauge(Long.class, url);
+        }
+
+        public <T> Function<APIClient, T> newGauge(BiFunction<APIClient, String, T> function, String url) {
+            return c -> {
+                return function.apply(c, url);
+            };
+        }
+
+        private <T> Function<APIClient, T> newGauge(Class<T> type, final String url) {
+            return newGauge(getReader(type), url);
+        }
+
+        final MetricNameFactory factory;
+        final MetricNameFactory aliasFactory;
+        final String cfName;
+        final MetricsRegistry other;
+
+        public Registry(MetricsRegistry other, MetricNameFactory factory, MetricNameFactory aliasFactory,
+                String cfName) {
+            super(other);
+            this.other = other;
+            this.cfName = cfName;
+            this.factory = factory;
+            this.aliasFactory = aliasFactory;
+        }
+
+        @Override
+        public void register(Supplier<MetricMBean> f, ObjectName... objectNames) {
+            other.register(f, objectNames);
+        }
+
+        public void createTableGauge(String name, String uri) throws MalformedObjectNameException {
+            createTableGauge(name, name, uri);
+        }
+
+        public void createTableGauge(String name, String alias, String uri) throws MalformedObjectNameException {
+            createTableGauge(Long.class, name, alias, uri);
+        }
+
+        public <T> void createTableGauge(Class<T> c, String name, String uri) throws MalformedObjectNameException {
+            createTableGauge(c, c, name, name, uri);
+        }
+
+        public <T> void createTableGauge(Class<T> c, String name, String alias, String uri) throws MalformedObjectNameException {
+            createTableGauge(c, name, alias, uri, getReader(c));
+        }
+        
+        public <T> void createTableGauge(Class<T> c, String name, String uri, BiFunction<APIClient, String, T> f)
+                throws MalformedObjectNameException {
+            createTableGauge(c, name, name, uri, f);
+        }
+
+        public <T> void createTableGauge(Class<T> c, String name, String alias, String uri,
+                BiFunction<APIClient, String, T> f) throws MalformedObjectNameException {
+            register(() -> gauge(newGauge(f, compose(uri, cfName))), factory.createMetricName(name),
+                    aliasFactory.createMetricName(alias));
+        }
+
+        private static <T> BiFunction<APIClient, String, T> getDummy(Class<T> type) {
+            if (type == String.class) {
+                return (c, s) -> type.cast("");
+            } else if (type == Integer.class) {
+                return (c, s) -> type.cast(0);
+            } else if (type == Double.class) {
+                return (c, s) -> type.cast(0.0);
+            } else if (type == Long.class) {
+                return (c, s) -> type.cast(0L);
+            }
+            throw new IllegalArgumentException(type.getName());
+        }
+
+        public <T> void createDummyTableGauge(Class<T> c, String name) throws MalformedObjectNameException {
+            register(() -> gauge(newGauge(getDummy(c), null)), factory.createMetricName(name),
+                    aliasFactory.createMetricName(name));
+        }
+
+        public <L, G> void createTableGauge(Class<L> c1, Class<G> c2, String name, String alias, String uri)
+                throws MalformedObjectNameException {
+            if (cfName != null) { 
+                createTableGauge(c1, name, alias, uri, getReader(c1));
+            } else { // global case
+                createTableGauge(c2, name, alias, uri, getReader(c2));
+            }
+        }
+
+        public void createTableCounter(String name, String uri) throws MalformedObjectNameException {
+            createTableCounter(name, name, uri);
+        }
+
+        public void createTableCounter(String name, String alias, String uri) throws MalformedObjectNameException {
+            register(() -> counter(compose(uri, cfName)), factory.createMetricName(name),
+                    aliasFactory.createMetricName(alias));
+        }
+
+        public void createDummyTableCounter(String name) throws MalformedObjectNameException {
+            register(() -> counter(null), factory.createMetricName(name),
+                    aliasFactory.createMetricName(name));
+        }
+
+        public void createTableHistogram(String name, String uri, boolean considerZeros)
+                throws MalformedObjectNameException {
+            createTableHistogram(name, name, uri, considerZeros);
+        }
+
+        public void createTableHistogram(String name, String alias, String uri, boolean considerZeros)
+                throws MalformedObjectNameException {
+            register(() -> histogram(compose(uri, cfName), considerZeros), factory.createMetricName(name),
+                    aliasFactory.createMetricName(alias));
+        }
+
+        public void createTimer(String name, String uri) throws MalformedObjectNameException {
+            register(() -> timer(compose(uri, cfName)), factory.createMetricName(name));
+        }
+    }
+
+    private void registerLocal(Registry registry) throws MalformedObjectNameException {
+        registry.createTableGauge(long[].class, "EstimatedPartitionSizeHistogram", "EstimatedRowSizeHistogram",
+                "estimated_row_size_histogram", APIClient::getEstimatedHistogramAsLongArrValue);
+        registry.createTableGauge("EstimatedPartitionCount", "EstimatedRowCount", "estimated_row_count");
+
+        registry.createTableGauge(long[].class, "EstimatedColumnCountHistogram", "estimated_column_count_histogram",
+                APIClient::getEstimatedHistogramAsLongArrValue);
+        registry.createTableGauge(Double.class, "KeyCacheHitRate", "key_cache_hit_rate");
+
+        registry.createTimer("CoordinatorReadLatency", "coordinator/read");
+        registry.createTimer("CoordinatorScanLatency", "coordinator/scan");
+        registry.createTimer("WaitingOnFreeMemtableSpace", "waiting_on_free_memtable");
+
+        for (LatencyMetrics l : latencyMetrics) {
+            l.register(registry);
+        }
+
+        // TODO: implement
+        registry.createDummyTableCounter("DroppedMutations");
+    }
+
+    private static void registerCommon(Registry registry) throws MalformedObjectNameException {
+        registry.createTableGauge("MemtableColumnsCount", "memtable_columns_count");
+        registry.createTableGauge("MemtableOnHeapSize", "memtable_on_heap_size");
+        registry.createTableGauge("MemtableOffHeapSize", "memtable_off_heap_size");
+        registry.createTableGauge("MemtableLiveDataSize", "memtable_live_data_size");
+        registry.createTableGauge("AllMemtablesHeapSize", "all_memtables_on_heap_size");
+        registry.createTableGauge("AllMemtablesOffHeapSize", "all_memtables_off_heap_size");
+        registry.createTableGauge("AllMemtablesLiveDataSize", "all_memtables_live_data_size");
+
+        registry.createTableCounter("MemtableSwitchCount", "memtable_switch_count");
+
+        registry.createTableHistogram("SSTablesPerReadHistogram", "sstables_per_read_histogram", true);
+        registry.createTableGauge(Double.class, "CompressionRatio", "compression_ratio");
+
+        registry.createTableCounter("PendingFlushes", "pending_flushes");
+
+        registry.createTableGauge(Integer.class, Long.class, "PendingCompactions", "PendingCompactions",
+                "pending_compactions");
+        registry.createTableGauge(Integer.class, Long.class, "LiveSSTableCount", "LiveSSTableCount",
+                "live_ss_table_count");
+
+        registry.createTableCounter("LiveDiskSpaceUsed", "live_disk_space_used");
+        registry.createTableCounter("TotalDiskSpaceUsed", "total_disk_space_used");
+        registry.createTableGauge("MinPartitionSize", "MinRowSize", "min_row_size");
+        registry.createTableGauge("MaxPartitionSize", "MaxRowSize", "max_row_size");
+        registry.createTableGauge("MeanPartitionSize", "MeanRowSize", "mean_row_size");
+
+        registry.createTableGauge("BloomFilterFalsePositives", "bloom_filter_false_positives");
+        registry.createTableGauge("RecentBloomFilterFalsePositives", "recent_bloom_filter_false_positives");
+        registry.createTableGauge(Double.class, "BloomFilterFalseRatio", "bloom_filter_false_ratio");
+        registry.createTableGauge(Double.class, "RecentBloomFilterFalseRatio", "recent_bloom_filter_false_ratio");
+
+        registry.createTableGauge("BloomFilterDiskSpaceUsed", "bloom_filter_disk_space_used");
+        registry.createTableGauge("BloomFilterOffHeapMemoryUsed", "bloom_filter_off_heap_memory_used");
+        registry.createTableGauge("IndexSummaryOffHeapMemoryUsed", "index_summary_off_heap_memory_used");
+        registry.createTableGauge("CompressionMetadataOffHeapMemoryUsed", "compression_metadata_off_heap_memory_used");
+        registry.createTableGauge("SpeculativeRetries", "speculative_retries");
+
+        registry.createTableHistogram("TombstoneScannedHistogram", "tombstone_scanned_histogram", false);
+        registry.createTableHistogram("LiveScannedHistogram", "live_scanned_histogram", false);
+        registry.createTableHistogram("ColUpdateTimeDeltaHistogram", "col_update_time_delta_histogram", false);
+
+        // We do not want to capture view mutation specific metrics for a view
+        // They only makes sense to capture on the base table
+        // TODO: views
+        // if (!cfs.metadata.isView())
+        // {
+        // viewLockAcquireTime = createTableTimer("ViewLockAcquireTime",
+        // cfs.keyspace.metric.viewLockAcquireTime);
+        // viewReadTime = createTableTimer("ViewReadTime",
+        // cfs.keyspace.metric.viewReadTime);
+        // }
+
+        registry.createTableGauge("SnapshotsSize", "snapshots_size");
+        registry.createTableCounter("RowCacheHitOutOfRange", "row_cache_hit_out_of_range");
+        registry.createTableCounter("RowCacheHit", "row_cache_hit");
+        registry.createTableCounter("RowCacheMiss", "row_cache_miss");
+
+        // TODO: implement
+        registry.createDummyTableGauge(Double.class, "PercentRepaired");
+    }
+
+    static class TableMetricObjectName extends javax.management.ObjectName {
+        private final TableMetricStringNameFactory factory;
+        private final String metricName;
+
+        public TableMetricObjectName(TableMetricStringNameFactory factory, String metricName) throws MalformedObjectNameException {
+            super("");
+            this.factory = factory;
+            this.metricName = metricName;
+        }
+
+        
+        @Override
+        public boolean isPropertyValuePattern(String property) {
+            return false;
+        }
+
+        @Override
+        public String getCanonicalName() {
+            return factory.createMetricStringName(metricName);
+        }
+
+        @Override
+        public String getDomain() {
+            return factory.getDomain();
+        }
+
+        @Override
+        public String getKeyProperty(String property) {
+            if (property == "name") {
+                return metricName;
+            }
+            return factory.getKeyProperty(property);
+        }
+
+        @Override
+        public Hashtable<String,String> getKeyPropertyList() {
+            Hashtable<String, String> res = factory.getKeyPropertyList();
+            res.put("name", metricName);
+            return res;
+        }
+
+        @Override
+        public String getKeyPropertyListString() {
+            return factory.getKeyPropertyListString(metricName);
+        }
+
+        @Override
+        public String getCanonicalKeyPropertyListString() {
+            return getKeyPropertyListString();
+        }
+
+        @Override
+        public String toString() {
+            return getCanonicalName();
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            return getCanonicalName().equals(((ObjectName) o).getCanonicalName());
+        }
+
+        @Override
+        public int hashCode() {
+            return getCanonicalName().hashCode();
+        }
+
+        @Override
+        public boolean apply(ObjectName name) {
+            if (name.isDomainPattern() || name.isPropertyListPattern() || name.isPropertyValuePattern()) {
+                return false;
+            }
+            return getCanonicalName().equals(name.getCanonicalName());
+        }
+
+
+        @Override
+        public boolean isPattern() {
+            return false;
+        }
+
+
+        @Override
+        public boolean isDomainPattern() {
+            return false;
+        }
+
+
+        @Override
+        public boolean isPropertyPattern() {
+            return false;
+        }
+
+
+        @Override
+        public boolean isPropertyListPattern() {
+            return false;
+        }
+
+
+        @Override
+        public boolean isPropertyValuePattern() {
+            return false;
+        }
+        
+        /**
+         * This type is not really serializable. 
+         * Replace it with vanilla objectname.
+         */
+		private Object writeReplace() throws ObjectStreamException {
+			try {
+				return new ObjectName(getDomain(), getKeyPropertyList());
+			} catch (MalformedObjectNameException e) {
+				throw new InvalidObjectException(toString());
+			}
+		}
+    }
+
+    static interface TableMetricStringNameFactory {
+        String createMetricStringName(String metricName);
+        String getDomain();
+        String getKeyProperty(String property);
+        Hashtable<String,String> getKeyPropertyList();
+        String getKeyPropertyListString(String metricName);
+    }
+
+    static class TableMetricNameFactory implements MetricNameFactory, TableMetricStringNameFactory {
+        private final String keyspaceName;
+        private final String tableName;
+        private final boolean isIndex;
+        private final String type;
+
+        public TableMetricNameFactory(String keyspaceName, String tableName, boolean isIndex, String type) {
+            this.keyspaceName = keyspaceName;
+            this.tableName = tableName;
+            this.isIndex = isIndex;
+            this.type = type;
+        }
+
+        private void appendKeyPropertyListString(final StringBuilder sb, final String metricName) {
+            String type = isIndex ? "Index" + this.type : this.type;
+            // Order matters here - keys have to be sorted
+            sb.append("keyspace=").append(keyspaceName);
+            sb.append(",name=").append(metricName);
+            sb.append(",scope=").append(tableName);
+            sb.append(",type=").append(type);
+        }
+
+        @Override
+        public String createMetricStringName(String metricName) {
+            String groupName = TableMetrics.class.getPackage().getName();
+
+            StringBuilder mbeanName = new StringBuilder();
+            mbeanName.append(groupName).append(":");
+            appendKeyPropertyListString(mbeanName, metricName);
+            return mbeanName.toString();
+        }
+
+        @Override
+        public String getDomain() {
+            return TableMetrics.class.getPackage().getName();
+        }
+
+        @Override
+        public String getKeyProperty(String property) {
+            switch (property) {
+                case "keyspace": return keyspaceName;
+                case "scope": return tableName;
+                case "type": return type;
+                default: return null;
+            }
+        }
+
+        @Override
+        public Hashtable<String,String> getKeyPropertyList() {
+            Hashtable<String, String> res = new Hashtable<>();
+            res.put("keyspace", keyspaceName);
+            res.put("scope", tableName);
+            res.put("type", type);
+            return res;
+        }
+
+        @Override
+        public String getKeyPropertyListString(String metricName) {
+            final StringBuilder sb = new StringBuilder();
+            appendKeyPropertyListString(sb, metricName);
+            return sb.toString();
+        }
+
+        @Override
+        public ObjectName createMetricName(String metricName) throws MalformedObjectNameException {
+            return new TableMetricObjectName(this, metricName);
+        }
+    }
+
+    static class AllTableMetricNameFactory implements MetricNameFactory, TableMetricStringNameFactory {
+        private final String type;
+
+        public AllTableMetricNameFactory(String type) {
+            this.type = type;
+        }
+
+        private void appendKeyPropertyListString(final StringBuilder sb, final String metricName) {
+            // Order matters here - keys have to be sorted
+            sb.append("name=").append(metricName);
+            sb.append(",type=" + type);
+        }
+
+        @Override
+        public String createMetricStringName(String metricName) {
+            String groupName = TableMetrics.class.getPackage().getName();
+            StringBuilder mbeanName = new StringBuilder();
+            mbeanName.append(groupName).append(":");
+            appendKeyPropertyListString(mbeanName, metricName);
+            return mbeanName.toString();
+        }
+
+        @Override
+        public String getDomain() {
+            return TableMetrics.class.getPackage().getName();
+        }
+
+        @Override
+        public String getKeyProperty(String property) {
+            switch (property) {
+                case "type": return type;
+                default: return null;
+            }
+        }
+
+        @Override
+        public Hashtable<String,String> getKeyPropertyList() {
+            Hashtable<String, String> res = new Hashtable<>();
+            res.put("type", type);
+            return res;
+        }
+
+        @Override
+        public String getKeyPropertyListString(String metricName) {
+            final StringBuilder sb = new StringBuilder();
+            appendKeyPropertyListString(sb, metricName);
+            return sb.toString();
+        }
+
+        @Override
+        public ObjectName createMetricName(String metricName) throws MalformedObjectNameException {
+            return new TableMetricObjectName(this, metricName);
+        }
+    }
+
+    public enum Sampler {
+        READS, WRITES
+    }
+}

src/main/java/org/apache/cassandra/net/MessagingService.java

@@ -22,172 +22,117 @@
  */
 package org.apache.cassandra.net;
 
-import java.lang.management.ManagementFactory;
+import static java.util.Collections.emptyMap;
-import java.net.*;
-import java.util.*;
-import java.util.Map.Entry;
 
-import javax.json.JsonArray;
+import jakarta.json.JsonArray;
-import javax.json.JsonObject;
+import jakarta.json.JsonObject;
-import javax.management.MBeanServer;
+import java.net.UnknownHostException;
-import javax.management.ObjectName;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.logging.Logger;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 import org.apache.cassandra.metrics.DroppedMessageMetrics;
 
 import com.scylladb.jmx.api.APIClient;
-import com.yammer.metrics.core.APISettableMeter;
+import com.scylladb.jmx.metrics.MetricsMBean;
 
-public final class MessagingService implements MessagingServiceMBean {
+public final class MessagingService extends MetricsMBean implements MessagingServiceMBean {
-    static final int INTERVAL = 1000; // update every 1second
     public static final String MBEAN_NAME = "org.apache.cassandra.net:type=MessagingService";
-    private static final java.util.logging.Logger logger = java.util.logging.Logger
+    private static final Logger logger = Logger.getLogger(MessagingService.class.getName());
-            .getLogger(MessagingService.class.getName());
+
-    Map<String, DroppedMessageMetrics> dropped;
+    private Map<String, Long> resentTimeouts = new HashMap<String, Long>();
-    private APIClient c = new APIClient();
-    Map<String, Long> resent_timeout = new HashMap<String, Long>();
-    private final ObjectName jmxObjectName;
     private long recentTimeoutCount;
 
     /* All verb handler identifiers */
-    public enum Verb
+    public enum Verb {
-    {
+        MUTATION, @Deprecated BINARY, READ_REPAIR, READ, REQUEST_RESPONSE, // client-initiated
-        MUTATION,
+                                                                           // reads
-        @Deprecated BINARY,
+                                                                           // and
-        READ_REPAIR,
+                                                                           // writes
-        READ,
+        @Deprecated STREAM_INITIATE, @Deprecated STREAM_INITIATE_DONE, @Deprecated STREAM_REPLY, @Deprecated STREAM_REQUEST, RANGE_SLICE, @Deprecated BOOTSTRAP_TOKEN, @Deprecated TREE_REQUEST, @Deprecated TREE_RESPONSE, @Deprecated JOIN, GOSSIP_DIGEST_SYN, GOSSIP_DIGEST_ACK, GOSSIP_DIGEST_ACK2, @Deprecated DEFINITIONS_ANNOUNCE, DEFINITIONS_UPDATE, TRUNCATE, SCHEMA_CHECK, @Deprecated INDEX_SCAN, REPLICATION_FINISHED, INTERNAL_RESPONSE, // responses
-        REQUEST_RESPONSE, // client-initiated reads and writes
+                                                                                                                                                                                                                                                                                                                                                                                                                                                       // to
-        @Deprecated STREAM_INITIATE,
+                                                                                                                                                                                                                                                                                                                                                                                                                                                       // internal
-        @Deprecated STREAM_INITIATE_DONE,
+                                                                                                                                                                                                                                                                                                                                                                                                                                                       // calls
-        @Deprecated STREAM_REPLY,
+        COUNTER_MUTATION, @Deprecated STREAMING_REPAIR_REQUEST, @Deprecated STREAMING_REPAIR_RESPONSE, SNAPSHOT, // Similar
-        @Deprecated STREAM_REQUEST,
+                                                                                                                 // to
-        RANGE_SLICE,
+                                                                                                                 // nt
-        @Deprecated BOOTSTRAP_TOKEN,
+                                                                                                                 // snapshot
-        @Deprecated TREE_REQUEST,
+        MIGRATION_REQUEST, GOSSIP_SHUTDOWN, _TRACE, // dummy verb so we can use
-        @Deprecated TREE_RESPONSE,
+                                                    // MS.droppedMessages
-        @Deprecated JOIN,
+        ECHO, REPAIR_MESSAGE,
-        GOSSIP_DIGEST_SYN,
+        // use as padding for backwards compatability where a previous version
-        GOSSIP_DIGEST_ACK,
+        // needs to validate a verb from the future.
-        GOSSIP_DIGEST_ACK2,
+        PAXOS_PREPARE, PAXOS_PROPOSE, PAXOS_COMMIT, PAGED_RANGE,
-        @Deprecated DEFINITIONS_ANNOUNCE,
-        DEFINITIONS_UPDATE,
-        TRUNCATE,
-        SCHEMA_CHECK,
-        @Deprecated INDEX_SCAN,
-        REPLICATION_FINISHED,
-        INTERNAL_RESPONSE, // responses to internal calls
-        COUNTER_MUTATION,
-        @Deprecated STREAMING_REPAIR_REQUEST,
-        @Deprecated STREAMING_REPAIR_RESPONSE,
-        SNAPSHOT, // Similar to nt snapshot
-        MIGRATION_REQUEST,
-        GOSSIP_SHUTDOWN,
-        _TRACE, // dummy verb so we can use MS.droppedMessages
-        ECHO,
-        REPAIR_MESSAGE,
-        // use as padding for backwards compatability where a previous version needs to validate a verb from the future.
-        PAXOS_PREPARE,
-        PAXOS_PROPOSE,
-        PAXOS_COMMIT,
-        PAGED_RANGE,
         // remember to add new verbs at the end, since we serialize by ordinal
-        UNUSED_1,
+        UNUSED_1, UNUSED_2, UNUSED_3,;
-        UNUSED_2,
-        UNUSED_3,
-        ;
     }
 
     public void log(String str) {
         logger.finest(str);
     }
 
-    private static Timer timer = new Timer("Dropped messages");
+    public MessagingService(APIClient client) {
-
+        super(MBEAN_NAME, client,
-    public MessagingService() {
+                Stream.of(Verb.values()).map(v -> new DroppedMessageMetrics(v)).collect(Collectors.toList()));
-        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
-        try {
-            jmxObjectName = new ObjectName(MBEAN_NAME);
-            mbs.registerMBean(this, jmxObjectName);
-            // mbs.registerMBean(StreamManager.instance, new ObjectName(
-            // StreamManager.OBJECT_NAME));
-        } catch (Exception e) {
-            throw new RuntimeException(e);
-        }
-        timer.schedule(new CheckDroppedMessages(), INTERVAL, INTERVAL);
-    }
-
-    static MessagingService instance = new MessagingService();
-
-    private static final class CheckDroppedMessages extends TimerTask {
-        @Override
-        public void run() {
-            if (instance.dropped == null) {
-                instance.dropped = new HashMap<String, DroppedMessageMetrics>();
-                for (Verb v : Verb.values()) {
-                    instance.dropped.put(v.name(), new DroppedMessageMetrics(v));
-                }
-            }
-            Map<String, Integer> val = instance.getDroppedMessages();
-            for (String k : val.keySet()) {
-                APISettableMeter meter = instance.dropped.get(k).getMeter();
-                meter.set(val.get(k));
-                meter.tick();
-            }
-        }
-    }
-
-    public static MessagingService getInstance() {
-        return instance;
     }
 
     /**
      * Pending tasks for Command(Mutations, Read etc) TCP Connections
      */
+    @Override
     public Map<String, Integer> getCommandPendingTasks() {
         log(" getCommandPendingTasks()");
-        return c.getMapStringIntegerValue("/messaging_service/messages/pending");
+        return client.getMapStringIntegerValue("/messaging_service/messages/pending");
     }
 
     /**
      * Completed tasks for Command(Mutations, Read etc) TCP Connections
      */
+    @Override
     public Map<String, Long> getCommandCompletedTasks() {
         log("getCommandCompletedTasks()");
-        Map<String, Long> res = c
+        Map<String, Long> res = client.getListMapStringLongValue("/messaging_service/messages/sent");
-                .getListMapStringLongValue("/messaging_service/messages/sent");
         return res;
     }
 
     /**
      * Dropped tasks for Command(Mutations, Read etc) TCP Connections
      */
+    @Override
     public Map<String, Long> getCommandDroppedTasks() {
         log(" getCommandDroppedTasks()");
-        return c.getMapStringLongValue("/messaging_service/messages/dropped");
+        return client.getMapStringLongValue("/messaging_service/messages/dropped");
     }
 
     /**
      * Pending tasks for Response(GOSSIP & RESPONSE) TCP Connections
      */
+    @Override
     public Map<String, Integer> getResponsePendingTasks() {
         log(" getResponsePendingTasks()");
-        return c.getMapStringIntegerValue("/messaging_service/messages/respond_pending");
+        return client.getMapStringIntegerValue("/messaging_service/messages/respond_pending");
     }
 
     /**
      * Completed tasks for Response(GOSSIP & RESPONSE) TCP Connections
      */
+    @Override
     public Map<String, Long> getResponseCompletedTasks() {
         log(" getResponseCompletedTasks()");
-        return c.getMapStringLongValue("/messaging_service/messages/respond_completed");
+        return client.getMapStringLongValue("/messaging_service/messages/respond_completed");
     }
 
     /**
      * dropped message counts for server lifetime
      */
+    @Override
     public Map<String, Integer> getDroppedMessages() {
         log(" getDroppedMessages()");
         Map<String, Integer> res = new HashMap<String, Integer>();
-        JsonArray arr = c.getJsonArray("/messaging_service/messages/dropped_by_ver");
+        JsonArray arr = client.getJsonArray("/messaging_service/messages/dropped_by_ver");
         for (int i = 0; i < arr.size(); i++) {
             JsonObject obj = arr.getJsonObject(i);
             res.put(obj.getString("verb"), obj.getInt("count"));
@@ -195,20 +140,32 @@ public final class MessagingService implements MessagingServiceMBean {
         return res;
     }
 
+    private Map<String, Integer> recent;
+
     /**
      * dropped message counts since last called
      */
+    @Override
     public Map<String, Integer> getRecentlyDroppedMessages() {
         log(" getRecentlyDroppedMessages()");
-        Map<String, Integer> map = new HashMap<String, Integer>();
+
-        for (Map.Entry<String, DroppedMessageMetrics> entry : dropped.entrySet())
+        Map<String, Integer> dropped = getDroppedMessages(), result = new HashMap<>(dropped), old = recent;
-            map.put(entry.getKey(), entry.getValue().getRecentlyDropped());
+
-        return map;
+        recent = dropped;
+
+        if (old != null) {
+            for (Map.Entry<String, Integer> e : old.entrySet()) {
+                result.put(e.getKey(), result.get(e.getKey()) - e.getValue());
+            }
+        }
+
+        return result;
     }
 
     /**
      * Total number of timeouts happened on this node
      */
+    @Override
     public long getTotalTimeouts() {
         log(" getTotalTimeouts()");
         Map<String, Long> timeouts = getTimeoutsPerHost();
@@ -222,14 +179,16 @@ public final class MessagingService implements MessagingServiceMBean {
     /**
      * Number of timeouts per host
      */
+    @Override
     public Map<String, Long> getTimeoutsPerHost() {
         log(" getTimeoutsPerHost()");
-        return c.getMapStringLongValue("/messaging_service/messages/timeout");
+        return client.getMapStringLongValue("/messaging_service/messages/timeout");
     }
 
     /**
      * Number of timeouts since last check.
      */
+    @Override
     public long getRecentTotalTimouts() {
         log(" getRecentTotalTimouts()");
         long timeoutCount = getTotalTimeouts();
@@ -241,23 +200,77 @@ public final class MessagingService implements MessagingServiceMBean {
     /**
      * Number of timeouts since last check per host.
      */
+    @Override
     public Map<String, Long> getRecentTimeoutsPerHost() {
         log(" getRecentTimeoutsPerHost()");
         Map<String, Long> timeouts = getTimeoutsPerHost();
         Map<String, Long> result = new HashMap<String, Long>();
-        for ( Entry<String, Long> e : timeouts.entrySet()) {
+        for (Entry<String, Long> e : timeouts.entrySet()) {
-            long res = e.getValue().longValue() -
+            long res = e.getValue().longValue()
-                    ((resent_timeout.containsKey(e.getKey()))? (resent_timeout.get(e.getKey())).longValue()
+                    - ((resentTimeouts.containsKey(e.getKey())) ? (resentTimeouts.get(e.getKey())).longValue() : 0);
-                            : 0);
+            resentTimeouts.put(e.getKey(), e.getValue());
-            resent_timeout.put(e.getKey(), e.getValue());
+            result.put(e.getKey(), res);
-            result.put(e.getKey(),res);
         }
         return result;
     }
 
+    @Override
     public int getVersion(String address) throws UnknownHostException {
         log(" getVersion(String address) throws UnknownHostException");
-        return c.getIntValue("");
+        return client.getIntValue("");
     }
 
+    @Override
+    public Map<String, Integer> getLargeMessagePendingTasks() {
+        // TODO: implement for realsies
+        return getCommandPendingTasks();
+    }
+
+    @Override
+    public Map<String, Long> getLargeMessageCompletedTasks() {
+        // TODO: implement for realsies
+        return getCommandCompletedTasks();
+    }
+
+    @Override
+    public Map<String, Long> getLargeMessageDroppedTasks() {
+        // TODO: implement for realsies
+        return getCommandDroppedTasks();
+    }
+
+    @Override
+    public Map<String, Integer> getSmallMessagePendingTasks() {
+        // TODO: implement for realsies
+        return getResponsePendingTasks();
+    }
+
+    @Override
+    public Map<String, Long> getSmallMessageCompletedTasks() {
+        // TODO: implement for realsies
+        return getResponseCompletedTasks();
+    }
+
+    @Override
+    public Map<String, Long> getSmallMessageDroppedTasks() {
+        // TODO: implement for realsies
+        return emptyMap();
+    }
+
+    @Override
+    public Map<String, Integer> getGossipMessagePendingTasks() {
+        // TODO: implement for realsies
+        return emptyMap();
+    }
+
+    @Override
+    public Map<String, Long> getGossipMessageCompletedTasks() {
+        // TODO: implement for realsies
+        return emptyMap();
+    }
+
+    @Override
+    public Map<String, Long> getGossipMessageDroppedTasks() {
+        // TODO: implement for realsies
+        return emptyMap();
+    }
 }

src/main/java/org/apache/cassandra/net/MessagingServiceMBean.java

@@ -15,6 +15,13 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
+/*
+ * Copyright 2015 Cloudius Systems
+ *
+ * Modified by Cloudius Systems
+ */
+
 package org.apache.cassandra.net;
 
 import java.net.UnknownHostException;
@@ -25,6 +32,51 @@ import java.util.Map;
  * Command/Response - Pending/Completed Tasks
  */
 public interface MessagingServiceMBean {
+    /**
+     * Pending tasks for large message TCP Connections
+     */
+    public Map<String, Integer> getLargeMessagePendingTasks();
+
+    /**
+     * Completed tasks for large message) TCP Connections
+     */
+    public Map<String, Long> getLargeMessageCompletedTasks();
+
+    /**
+     * Dropped tasks for large message TCP Connections
+     */
+    public Map<String, Long> getLargeMessageDroppedTasks();
+
+    /**
+     * Pending tasks for small message TCP Connections
+     */
+    public Map<String, Integer> getSmallMessagePendingTasks();
+
+    /**
+     * Completed tasks for small message TCP Connections
+     */
+    public Map<String, Long> getSmallMessageCompletedTasks();
+
+    /**
+     * Dropped tasks for small message TCP Connections
+     */
+    public Map<String, Long> getSmallMessageDroppedTasks();
+
+    /**
+     * Pending tasks for gossip message TCP Connections
+     */
+    public Map<String, Integer> getGossipMessagePendingTasks();
+
+    /**
+     * Completed tasks for gossip message TCP Connections
+     */
+    public Map<String, Long> getGossipMessageCompletedTasks();
+
+    /**
+     * Dropped tasks for gossip message TCP Connections
+     */
+    public Map<String, Long> getGossipMessageDroppedTasks();
+
     /**
      * Pending tasks for Command(Mutations, Read etc) TCP Connections
      */
@@ -70,6 +122,20 @@ public interface MessagingServiceMBean {
      */
     public Map<String, Long> getTimeoutsPerHost();
 
+    /**
+     * Back-pressure rate limiting per host
+     */
+    default public Map<String, Double> getBackPressurePerHost() {
+        throw new UnsupportedOperationException();
+    }
+
+    /**
+     * Enable/Disable back-pressure
+     */
+    default public void setBackPressureEnabled(boolean enabled) {
+        throw new UnsupportedOperationException();
+    }
+
     /**
      * Number of timeouts since last check.
      */

src/main/java/org/apache/cassandra/service/CacheService.java

@@ -24,22 +24,18 @@
 
 package org.apache.cassandra.service;
 
-import java.lang.management.ManagementFactory;
+import jakarta.ws.rs.core.MultivaluedHashMap;
+import jakarta.ws.rs.core.MultivaluedMap;
 import java.util.concurrent.ExecutionException;
-
+import java.util.logging.Logger;
-import javax.management.MBeanServer;
-import javax.management.ObjectName;
-import javax.ws.rs.core.MultivaluedHashMap;
-import javax.ws.rs.core.MultivaluedMap;
 
 import org.apache.cassandra.metrics.CacheMetrics;
 
 import com.scylladb.jmx.api.APIClient;
+import com.scylladb.jmx.metrics.MetricsMBean;
 
-public class CacheService implements CacheServiceMBean {
+public class CacheService extends MetricsMBean implements CacheServiceMBean {
-    private static final java.util.logging.Logger logger = java.util.logging.Logger
+    private static final Logger logger = Logger.getLogger(CacheService.class.getName());
-            .getLogger(CacheService.class.getName());
-    private APIClient c = new APIClient();
 
     public void log(String str) {
         logger.finest(str);
@@ -47,141 +43,141 @@ public class CacheService implements CacheServiceMBean {
 
     public static final String MBEAN_NAME = "org.apache.cassandra.db:type=Caches";
 
-    public final CacheMetrics keyCache;
+    public CacheService(APIClient client) {
-    public final CacheMetrics rowCache;
+        super(MBEAN_NAME, client, new CacheMetrics("KeyCache", "key"), new CacheMetrics("RowCache", "row"),
-    public final CacheMetrics counterCache;
+                new CacheMetrics("CounterCache", "counter"));
-    public final static CacheService instance = new CacheService();
-
-    public static CacheService getInstance() {
-        return instance;
-    }
-
-    private CacheService() {
-        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
-
-        try {
-            mbs.registerMBean(this, new ObjectName(MBEAN_NAME));
-        } catch (Exception e) {
-            throw new RuntimeException(e);
-        }
-
-        keyCache = new CacheMetrics("KeyCache", "key");
-        rowCache = new CacheMetrics("RowCache", "row");
-        counterCache  = new CacheMetrics("CounterCache", "counter");
     }
 
+    @Override
     public int getRowCacheSavePeriodInSeconds() {
         log(" getRowCacheSavePeriodInSeconds()");
-        return c.getIntValue("cache_service/row_cache_save_period");
+        return client.getIntValue("cache_service/row_cache_save_period");
     }
 
+    @Override
     public void setRowCacheSavePeriodInSeconds(int rcspis) {
         log(" setRowCacheSavePeriodInSeconds(int rcspis)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("period", Integer.toString(rcspis));
-        c.post("cache_service/row_cache_save_period", queryParams);
+        client.post("cache_service/row_cache_save_period", queryParams);
     }
 
+    @Override
     public int getKeyCacheSavePeriodInSeconds() {
         log(" getKeyCacheSavePeriodInSeconds()");
-        return c.getIntValue("cache_service/key_cache_save_period");
+        return client.getIntValue("cache_service/key_cache_save_period");
     }
 
+    @Override
     public void setKeyCacheSavePeriodInSeconds(int kcspis) {
         log(" setKeyCacheSavePeriodInSeconds(int kcspis)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("period", Integer.toString(kcspis));
-        c.post("cache_service/key_cache_save_period", queryParams);
+        client.post("cache_service/key_cache_save_period", queryParams);
     }
 
+    @Override
     public int getCounterCacheSavePeriodInSeconds() {
         log(" getCounterCacheSavePeriodInSeconds()");
-        return c.getIntValue("cache_service/counter_cache_save_period");
+        return client.getIntValue("cache_service/counter_cache_save_period");
     }
 
+    @Override
     public void setCounterCacheSavePeriodInSeconds(int ccspis) {
         log(" setCounterCacheSavePeriodInSeconds(int ccspis)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("ccspis", Integer.toString(ccspis));
-        c.post("cache_service/counter_cache_save_period", queryParams);
+        client.post("cache_service/counter_cache_save_period", queryParams);
     }
 
+    @Override
     public int getRowCacheKeysToSave() {
         log(" getRowCacheKeysToSave()");
-        return c.getIntValue("cache_service/row_cache_keys_to_save");
+        return client.getIntValue("cache_service/row_cache_keys_to_save");
     }
 
+    @Override
     public void setRowCacheKeysToSave(int rckts) {
         log(" setRowCacheKeysToSave(int rckts)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("rckts", Integer.toString(rckts));
-        c.post("cache_service/row_cache_keys_to_save", queryParams);
+        client.post("cache_service/row_cache_keys_to_save", queryParams);
     }
 
+    @Override
     public int getKeyCacheKeysToSave() {
         log(" getKeyCacheKeysToSave()");
-        return c.getIntValue("cache_service/key_cache_keys_to_save");
+        return client.getIntValue("cache_service/key_cache_keys_to_save");
     }
 
+    @Override
     public void setKeyCacheKeysToSave(int kckts) {
         log(" setKeyCacheKeysToSave(int kckts)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("kckts", Integer.toString(kckts));
-        c.post("cache_service/key_cache_keys_to_save", queryParams);
+        client.post("cache_service/key_cache_keys_to_save", queryParams);
     }
 
+    @Override
     public int getCounterCacheKeysToSave() {
         log(" getCounterCacheKeysToSave()");
-        return c.getIntValue("cache_service/counter_cache_keys_to_save");
+        return client.getIntValue("cache_service/counter_cache_keys_to_save");
     }
 
+    @Override
     public void setCounterCacheKeysToSave(int cckts) {
         log(" setCounterCacheKeysToSave(int cckts)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("cckts", Integer.toString(cckts));
-        c.post("cache_service/counter_cache_keys_to_save", queryParams);
+        client.post("cache_service/counter_cache_keys_to_save", queryParams);
     }
 
     /**
      * invalidate the key cache; for use after invalidating row cache
      */
+    @Override
     public void invalidateKeyCache() {
         log(" invalidateKeyCache()");
-        c.post("cache_service/invalidate_key_cache");
+        client.post("cache_service/invalidate_key_cache");
     }
 
     /**
      * invalidate the row cache; for use after bulk loading via BinaryMemtable
      */
+    @Override
     public void invalidateRowCache() {
         log(" invalidateRowCache()");
-        c.post("cache_service/invalidate_row_cache");
+        client.post("cache_service/invalidate_row_cache");
     }
 
+    @Override
     public void invalidateCounterCache() {
         log(" invalidateCounterCache()");
-        c.post("cache_service/invalidate_counter_cache");
+        client.post("cache_service/invalidate_counter_cache");
     }
 
+    @Override
     public void setRowCacheCapacityInMB(long capacity) {
         log(" setRowCacheCapacityInMB(long capacity)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("capacity", Long.toString(capacity));
-        c.post("cache_service/row_cache_capacity", queryParams);
+        client.post("cache_service/row_cache_capacity", queryParams);
     }
 
+    @Override
     public void setKeyCacheCapacityInMB(long capacity) {
         log(" setKeyCacheCapacityInMB(long capacity)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("capacity", Long.toString(capacity));
-        c.post("cache_service/key_cache_capacity", queryParams);
+        client.post("cache_service/key_cache_capacity", queryParams);
     }
 
+    @Override
     public void setCounterCacheCapacityInMB(long capacity) {
         log(" setCounterCacheCapacityInMB(long capacity)");
         MultivaluedMap<String, String> queryParams = new MultivaluedHashMap<String, String>();
         queryParams.add("capacity", Long.toString(capacity));
-        c.post("cache_service/counter_cache_capacity_in_mb", queryParams);
+        client.post("cache_service/counter_cache_capacity_in_mb", queryParams);
     }
 
     /**
@@ -195,139 +191,9 @@ public class CacheService implements CacheServiceMBean {
      *             and the thread is interrupted, either before or during the
      *             activity.
      */
+    @Override
     public void saveCaches() throws ExecutionException, InterruptedException {
         log(" saveCaches() throws ExecutionException, InterruptedException");
-        c.post("cache_service/save_caches");
+        client.post("cache_service/save_caches");
-    }
-
-    //
-    // remaining methods are provided for backwards compatibility; modern
-    // clients should use CacheMetrics instead
-    //
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#hits
-     */
-    @Deprecated
-    public long getKeyCacheHits() {
-        log(" getKeyCacheHits()");
-        return keyCache.hits.count();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#hits
-     */
-    @Deprecated
-    public long getRowCacheHits() {
-        log(" getRowCacheHits()");
-        return rowCache.hits.count();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#requests
-     */
-    @Deprecated
-    public long getKeyCacheRequests() {
-        log(" getKeyCacheRequests()");
-        return keyCache.requests.count();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#requests
-     */
-    @Deprecated
-    public long getRowCacheRequests() {
-        log(" getRowCacheRequests()");
-        return rowCache.requests.count();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#hitRate
-     */
-    @Deprecated
-    public double getKeyCacheRecentHitRate() {
-        log(" getKeyCacheRecentHitRate()");
-        return keyCache.getRecentHitRate();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#hitRate
-     */
-    @Deprecated
-    public double getRowCacheRecentHitRate() {
-        log(" getRowCacheRecentHitRate()");
-        return rowCache.getRecentHitRate();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#capacity
-     */
-    @Deprecated
-    public long getRowCacheCapacityInMB() {
-        log(" getRowCacheCapacityInMB()");
-        return getRowCacheCapacityInBytes() / 1024 / 1024;
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#capacity
-     */
-    @Deprecated
-    public long getRowCacheCapacityInBytes() {
-        log(" getRowCacheCapacityInBytes()");
-        return rowCache.capacity.value();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#capacity
-     */
-    @Deprecated
-    public long getKeyCacheCapacityInMB() {
-        log(" getKeyCacheCapacityInMB()");
-        return getKeyCacheCapacityInBytes() / 1024 / 1024;
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#capacity
-     */
-    @Deprecated
-    public long getKeyCacheCapacityInBytes() {
-        log(" getKeyCacheCapacityInBytes()");
-        return keyCache.capacity.value();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#size
-     */
-    @Deprecated
-    public long getRowCacheSize() {
-        log(" getRowCacheSize()");
-        return rowCache.size.value();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#entries
-     */
-    @Deprecated
-    public long getRowCacheEntries() {
-        log(" getRowCacheEntries()");
-        return rowCache.size.value();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#size
-     */
-    @Deprecated
-    public long getKeyCacheSize() {
-        log(" getKeyCacheSize()");
-        return keyCache.size.value();
-    }
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#entries
-     */
-    @Deprecated
-    public long getKeyCacheEntries() {
-        log(" getKeyCacheEntries()");
-        return keyCache.size.value();
     }
 }

src/main/java/org/apache/cassandra/service/CacheServiceMBean.java

@@ -15,19 +15,28 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
+/*
+ * Copyright 2015 Cloudius Systems
+ *
+ * Modified by Cloudius Systems
+ */
+
 package org.apache.cassandra.service;
 
 import java.util.concurrent.ExecutionException;
 
-public interface CacheServiceMBean
+public interface CacheServiceMBean {
-{
     public int getRowCacheSavePeriodInSeconds();
+
     public void setRowCacheSavePeriodInSeconds(int rcspis);
 
     public int getKeyCacheSavePeriodInSeconds();
+
     public void setKeyCacheSavePeriodInSeconds(int kcspis);
 
     public int getCounterCacheSavePeriodInSeconds();
+
     public void setCounterCacheSavePeriodInSeconds(int ccspis);
 
     public int getRowCacheKeysToSave();
@@ -35,9 +44,11 @@ public interface CacheServiceMBean
     public void setRowCacheKeysToSave(int rckts);
 
     public int getKeyCacheKeysToSave();
+
     public void setKeyCacheKeysToSave(int kckts);
 
     public int getCounterCacheKeysToSave();
+
     public void setCounterCacheKeysToSave(int cckts);
 
     /**
@@ -61,94 +72,13 @@ public interface CacheServiceMBean
     /**
      * save row and key caches
      *
-     * @throws ExecutionException when attempting to retrieve the result of a task that aborted by throwing an exception
+     * @throws ExecutionException
-     * @throws InterruptedException when a thread is waiting, sleeping, or otherwise occupied, and the thread is interrupted, either before or during the activity.
+     *             when attempting to retrieve the result of a task that aborted
+     *             by throwing an exception
+     * @throws InterruptedException
+     *             when a thread is waiting, sleeping, or otherwise occupied,
+     *             and the thread is interrupted, either before or during the
+     *             activity.
      */
     public void saveCaches() throws ExecutionException, InterruptedException;
-
-    //
-    // remaining methods are provided for backwards compatibility; modern clients should use CacheMetrics instead
-    //
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#hits
-     */
-    @Deprecated
-    public long getKeyCacheHits();
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#hits
-     */
-    @Deprecated
-    public long getRowCacheHits();
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#requests
-     */
-    @Deprecated
-    public long getKeyCacheRequests();
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#requests
-     */
-    @Deprecated
-    public long getRowCacheRequests();
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#hitRate
-     */
-    @Deprecated
-    public double getKeyCacheRecentHitRate();
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#hitRate
-     */
-    @Deprecated
-    public double getRowCacheRecentHitRate();
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#capacity
-     */
-    @Deprecated
-    public long getRowCacheCapacityInMB();
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#capacity
-     */
-    @Deprecated
-    public long getRowCacheCapacityInBytes();
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#capacity
-     */
-    @Deprecated
-    public long getKeyCacheCapacityInMB();
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#capacity
-     */
-    @Deprecated
-    public long getKeyCacheCapacityInBytes();
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#size
-     */
-    @Deprecated
-    public long getRowCacheSize();
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#entries
-     */
-    @Deprecated
-    public long getRowCacheEntries();
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#size
-     */
-    @Deprecated
-    public long getKeyCacheSize();
-
-    /**
-     * @see org.apache.cassandra.metrics.CacheMetrics#entries
-     */
-    @Deprecated
-    public long getKeyCacheEntries();
 }

src/main/java/org/apache/cassandra/service/GCInspector.java

@@ -24,257 +24,18 @@
 
 package org.apache.cassandra.service;
 
-import java.lang.management.GarbageCollectorMXBean;
+import com.scylladb.jmx.api.APIClient;
-import java.lang.management.ManagementFactory;
+import com.scylladb.jmx.metrics.APIMBean;
-import java.lang.management.MemoryUsage;
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicReference;
-import javax.management.MBeanServer;
-import javax.management.Notification;
-import javax.management.NotificationListener;
-import javax.management.ObjectName;
-import javax.management.openmbean.CompositeData;
 
-import org.slf4j.Logger;
+public class GCInspector extends APIMBean implements GCInspectorMXBean {
-import org.slf4j.LoggerFactory;
-
-import com.sun.management.GarbageCollectionNotificationInfo;
-import com.sun.management.GcInfo;
-
-public class GCInspector implements NotificationListener, GCInspectorMXBean
-{
     public static final String MBEAN_NAME = "org.apache.cassandra.service:type=GCInspector";
-    private static final Logger logger = LoggerFactory.getLogger(GCInspector.class);
-    final static long MIN_LOG_DURATION = 200;
-    final static long MIN_LOG_DURATION_TPSTATS = 1000;
 
-    static final class State
+    public GCInspector(APIClient client) {
-    {
+        super(client);
-        final double maxRealTimeElapsed;
-        final double totalRealTimeElapsed;
-        final double sumSquaresRealTimeElapsed;
-        final double totalBytesReclaimed;
-        final double count;
-        final long startNanos;
-
-        State(double extraElapsed, double extraBytes, State prev)
-        {
-            this.totalRealTimeElapsed = prev.totalRealTimeElapsed + extraElapsed;
-            this.totalBytesReclaimed = prev.totalBytesReclaimed + extraBytes;
-            this.sumSquaresRealTimeElapsed = prev.sumSquaresRealTimeElapsed + (extraElapsed * extraElapsed);
-            this.startNanos = prev.startNanos;
-            this.count = prev.count + 1;
-            this.maxRealTimeElapsed = Math.max(prev.maxRealTimeElapsed, extraElapsed);
-        }
-
-        State()
-        {
-            count = maxRealTimeElapsed = sumSquaresRealTimeElapsed = totalRealTimeElapsed = totalBytesReclaimed = 0;
-            startNanos = System.nanoTime();
-        }
     }
 
-    static final class GCState
+    @Override
-    {
+    public double[] getAndResetStats() {
-        final GarbageCollectorMXBean gcBean;
+        return new double[6];
-        final boolean assumeGCIsPartiallyConcurrent;
-        final boolean assumeGCIsOldGen;
-        private String[] keys;
-        long lastGcTotalDuration = 0;
-
-
-        GCState(GarbageCollectorMXBean gcBean, boolean assumeGCIsPartiallyConcurrent, boolean assumeGCIsOldGen)
-        {
-            this.gcBean = gcBean;
-            this.assumeGCIsPartiallyConcurrent = assumeGCIsPartiallyConcurrent;
-            this.assumeGCIsOldGen = assumeGCIsOldGen;
-        }
-
-        String[] keys(GarbageCollectionNotificationInfo info)
-        {
-            if (keys != null)
-                return keys;
-
-            keys = info.getGcInfo().getMemoryUsageBeforeGc().keySet().toArray(new String[0]);
-            Arrays.sort(keys);
-
-            return keys;
-        }
-    }
-
-    final AtomicReference<State> state = new AtomicReference<>(new State());
-
-    final Map<String, GCState> gcStates = new HashMap<>();
-
-    public GCInspector()
-    {
-        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
-
-        try
-        {
-            ObjectName gcName = new ObjectName(ManagementFactory.GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE + ",*");
-            for (ObjectName name : mbs.queryNames(gcName, null))
-            {
-                GarbageCollectorMXBean gc = ManagementFactory.newPlatformMXBeanProxy(mbs, name.getCanonicalName(), GarbageCollectorMXBean.class);
-                gcStates.put(gc.getName(), new GCState(gc, assumeGCIsPartiallyConcurrent(gc), assumeGCIsOldGen(gc)));
-            }
-
-            mbs.registerMBean(this, new ObjectName(MBEAN_NAME));
-        }
-        catch (Exception e)
-        {
-            throw new RuntimeException(e);
-        }
-    }
-
-    public static void register() throws Exception
-    {
-        GCInspector inspector = new GCInspector();
-        MBeanServer server = ManagementFactory.getPlatformMBeanServer();
-        ObjectName gcName = new ObjectName(ManagementFactory.GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE + ",*");
-        for (ObjectName name : server.queryNames(gcName, null))
-        {
-            server.addNotificationListener(name, inspector, null, null);
-        }
-    }
-
-    /*
-     * Assume that a GC type is at least partially concurrent and so a side channel method
-     * should be used to calculate application stopped time due to the GC.
-     *
-     * If the GC isn't recognized then assume that is concurrent and we need to do our own calculation
-     * via the the side channel.
-     */
-    private static boolean assumeGCIsPartiallyConcurrent(GarbageCollectorMXBean gc)
-    {
-        switch (gc.getName())
-        {
-                //First two are from the serial collector
-            case "Copy":
-            case "MarkSweepCompact":
-                //Parallel collector
-            case "PS MarkSweep":
-            case "PS Scavenge":
-            case "G1 Young Generation":
-                //CMS young generation collector
-            case "ParNew":
-                return false;
-            case "ConcurrentMarkSweep":
-            case "G1 Old Generation":
-                return true;
-            default:
-                //Assume possibly concurrent if unsure
-                return true;
-        }
-    }
-
-    /*
-     * Assume that a GC type is an old generation collection so SSTableDeletingTask.rescheduleFailedTasks()
-     * should be invoked.
-     *
-     * Defaults to not invoking SSTableDeletingTask.rescheduleFailedTasks() on unrecognized GC names
-     */
-    private static boolean assumeGCIsOldGen(GarbageCollectorMXBean gc)
-    {
-        switch (gc.getName())
-        {
-            case "Copy":
-            case "PS Scavenge":
-            case "G1 Young Generation":
-            case "ParNew":
-                return false;
-            case "MarkSweepCompact":
-            case "PS MarkSweep":
-            case "ConcurrentMarkSweep":
-            case "G1 Old Generation":
-                return true;
-            default:
-                //Assume not old gen otherwise, don't call
-                //SSTableDeletingTask.rescheduleFailedTasks()
-                return false;
-        }
-    }
-
-    public void handleNotification(final Notification notification, final Object handback)
-    {
-        String type = notification.getType();
-        if (type.equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION))
-        {
-            // retrieve the garbage collection notification information
-            CompositeData cd = (CompositeData) notification.getUserData();
-            GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from(cd);
-            String gcName = info.getGcName();
-            GcInfo gcInfo = info.getGcInfo();
-
-            long duration = gcInfo.getDuration();
-
-            /*
-             * The duration supplied in the notification info includes more than just
-             * application stopped time for concurrent GCs. Try and do a better job coming up with a good stopped time
-             * value by asking for and tracking cumulative time spent blocked in GC.
-             */
-            GCState gcState = gcStates.get(gcName);
-            if (gcState.assumeGCIsPartiallyConcurrent)
-            {
-                long previousTotal = gcState.lastGcTotalDuration;
-                long total = gcState.gcBean.getCollectionTime();
-                gcState.lastGcTotalDuration = total;
-                duration = total - previousTotal; // may be zero for a really fast collection
-            }
-
-            StringBuilder sb = new StringBuilder();
-            sb.append(info.getGcName()).append(" GC in ").append(duration).append("ms.  ");
-            long bytes = 0;
-            Map<String, MemoryUsage> beforeMemoryUsage = gcInfo.getMemoryUsageBeforeGc();
-            Map<String, MemoryUsage> afterMemoryUsage = gcInfo.getMemoryUsageAfterGc();
-            for (String key : gcState.keys(info))
-            {
-                MemoryUsage before = beforeMemoryUsage.get(key);
-                MemoryUsage after = afterMemoryUsage.get(key);
-                if (after != null && after.getUsed() != before.getUsed())
-                {
-                    sb.append(key).append(": ").append(before.getUsed());
-                    sb.append(" -> ");
-                    sb.append(after.getUsed());
-                    if (!key.equals(gcState.keys[gcState.keys.length - 1]))
-                        sb.append("; ");
-                    bytes += before.getUsed() - after.getUsed();
-                }
-            }
-
-            while (true)
-            {
-                State prev = state.get();
-                if (state.compareAndSet(prev, new State(duration, bytes, prev)))
-                    break;
-            }
-
-            String st = sb.toString();
-            if (duration > MIN_LOG_DURATION)
-                logger.trace(st);
-            else if (logger.isDebugEnabled())
-                logger.debug(st);
-        }
-    }
-
-    public State getTotalSinceLastCheck()
-    {
-        return state.getAndSet(new State());
-    }
-
-    public double[] getAndResetStats()
-    {
-        State state = getTotalSinceLastCheck();
-        double[] r = new double[6];
-        r[0] = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - state.startNanos);
-        r[1] = state.maxRealTimeElapsed;
-        r[2] = state.totalRealTimeElapsed;
-        r[3] = state.sumSquaresRealTimeElapsed;
-        r[4] = state.totalBytesReclaimed;
-        r[5] = state.count;
-        return r;
     }
 }

src/main/java/org/apache/cassandra/service/GCInspectorMXBean.java

@@ -18,8 +18,8 @@
 */
 package org.apache.cassandra.service;
 
-public interface GCInspectorMXBean
+public interface GCInspectorMXBean {
-{
+    // returns { interval (ms), max(gc real time (ms)), sum(gc real time (ms)),
-    // returns { interval (ms), max(gc real time (ms)), sum(gc real time (ms)), sum((gc real time (ms))^2), sum(gc bytes), count(gc) }
+    // sum((gc real time (ms))^2), sum(gc bytes), count(gc) }
     public double[] getAndResetStats();
 }