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Remove yammer/codehale dependencies and augumentations

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elcallio 2016-10-11 14:14:05 +02:00 committed by Calle Wilund
parent 824638594b
commit 9c2d6cec51
10 changed files with 2 additions and 1327 deletions
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14
pom.xml
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@ -10,8 +10,8 @@
<name>Scylla JMX</name>
<properties>
<maven.compiler.target>1.7</maven.compiler.target>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.source>1.8</maven.compiler.source>
</properties>
<dependencies>
@ -71,21 +71,11 @@
<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>
<dependency>
<groupId>mx4j</groupId>
<artifactId>mx4j</artifactId>
<version>3.0.2</version>
</dependency>
</dependencies>
<build>
<plugins>

315
src/main/java/com/scylladb/jmx/utils/EstimatedHistogram.java
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@ -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));
}
}

65
src/main/java/com/scylladb/jmx/utils/RecentEstimatedHistogram.java
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@ -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;
}
}

29
src/main/java/com/yammer/metrics/core/APICounter.java
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@ -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);
}
}

215
src/main/java/com/yammer/metrics/core/APIHistogram.java
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@ -1,215 +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 javax.json.JsonObject;
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 updateValue(HistogramValues vals) {
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();
}
}
public void update() {
if (url == null) {
return;
}
long now = System.currentTimeMillis();
if (now - last_update < UPDATE_INTERVAL) {
return;
}
last_update = now;
clear();
JsonObject obj = c.getJsonObj(url, null);
if (obj.containsKey("hist")) {
updateValue(APIClient.json2histogram(obj.getJsonObject("hist")));
} else {
updateValue(APIClient.json2histogram(obj));
}
}
/**
* 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();
}
}

113
src/main/java/com/yammer/metrics/core/APIMeter.java
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@ -1,113 +0,0 @@
package com.yammer.metrics.core;
/*
* Copyright (C) 2015 ScyllaDB
*/
import java.util.concurrent.ScheduledExecutorService;
/*
* 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/>.
*/
/*
* Modified by ScyllaDB
*/
import java.util.concurrent.TimeUnit;
import javax.json.JsonArray;
import javax.json.JsonObject;
import com.scylladb.jmx.api.APIClient;
public class APIMeter extends Meter {
public final static long CACHE_DURATION = 1000;
String url;
String eventType;
TimeUnit rateUnit;
APIClient c = new APIClient();
long count;
double oneMinuteRate;
double fiveMinuteRate;
double fifteenMinuteRate;
double meanRate;
public APIMeter(String url, ScheduledExecutorService tickThread,
String eventType, TimeUnit rateUnit) {
super(tickThread, eventType, rateUnit, Clock.defaultClock());
super.stop();
this.url = url;
this.eventType = eventType;
this.rateUnit = rateUnit;
}
public void fromJson(JsonObject obj) {
JsonArray rates = obj.getJsonArray("rates");
int i = 0;
oneMinuteRate = rates.getJsonNumber(i++).doubleValue();
fiveMinuteRate = rates.getJsonNumber(i++).doubleValue();
fifteenMinuteRate = rates.getJsonNumber(i++).doubleValue();
meanRate = obj.getJsonNumber("mean_rate").doubleValue();
count = obj.getJsonNumber("count").longValue();
}
public void update_fields() {
if (url != null) {
fromJson(c.getJsonObj(url, null, CACHE_DURATION));
}
}
@Override
public TimeUnit rateUnit() {
return rateUnit;
}
@Override
public String eventType() {
return eventType;
}
@Override
public long count() {
update_fields();
return count;
}
@Override
public double fifteenMinuteRate() {
update_fields();
return fifteenMinuteRate;
}
@Override
public double fiveMinuteRate() {
update_fields();
return fiveMinuteRate;
}
@Override
public double meanRate() {
update_fields();
return meanRate;
}
@Override
public double oneMinuteRate() {
update_fields();
return oneMinuteRate;
}
}

384
src/main/java/com/yammer/metrics/core/APIMetricsRegistry.java
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@ -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 APIMeter 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 APIMeter 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 APIMeter newMeter(String url, MetricName metricName, String eventType,
TimeUnit unit) {
final Metric existingMetric = getMetrics().get(metricName);
if (existingMetric != null) {
return (APIMeter) existingMetric;
}
return getOrAdd(metricName, new APIMeter(url, newMeterTickThreadPool(),
eventType, unit));
}
/**
* 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));
}
}

49
src/main/java/com/yammer/metrics/core/APISettableMeter.java
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@ -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();
}
}

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src/main/java/com/yammer/metrics/core/APITimer.java
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@ -1,134 +0,0 @@
/*
* Copyright 2015 Cloudius Systems
*
*/
package com.yammer.metrics.core;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import javax.json.JsonObject;
import com.scylladb.jmx.api.APIClient;
import com.yammer.metrics.core.Histogram.SampleType;
import com.yammer.metrics.stats.Snapshot;
/**
* A timer metric which aggregates timing durations and provides duration
* statistics, plus throughput statistics via {@link Meter}.
*/
public class APITimer extends Timer {
public final static long CACHE_DURATION = 1000;
final TimeUnit durationUnit, rateUnit;
final APIMeter meter;
final APIHistogram histogram;
APIClient c = new APIClient();
private double convertFromNS(double ns) {
return ns / TimeUnit.NANOSECONDS.convert(1, durationUnit);
}
String url;
public APITimer(String url, ScheduledExecutorService tickThread,
TimeUnit durationUnit, TimeUnit rateUnit) {
super(tickThread, durationUnit, rateUnit);
super.stop();
this.url = url;
this.durationUnit = durationUnit;
this.rateUnit = rateUnit;
meter = new APIMeter(null, tickThread, "calls", rateUnit);
histogram = new APIHistogram(null, SampleType.BIASED);
}
public void fromJson(JsonObject obj) {
meter.fromJson(obj.getJsonObject("meter"));
histogram.updateValue(APIClient.json2histogram(obj.getJsonObject("hist")));
}
public void update_fields() {
if (url != null) {
fromJson(c.getJsonObj(url, null, CACHE_DURATION));
}
}
@Override
public double max() {
update_fields();
return convertFromNS(histogram.max());
}
@Override
public double min() {
update_fields();
return convertFromNS(histogram.min());
}
@Override
public double mean() {
update_fields();
return convertFromNS(histogram.mean());
}
@Override
public double stdDev() {
update_fields();
return convertFromNS(histogram.stdDev());
}
@Override
public double sum() {
update_fields();
return convertFromNS(histogram.sum());
}
@Override
public Snapshot getSnapshot() {
update_fields();
return histogram.getSnapshot();
}
@Override
public TimeUnit rateUnit() {
update_fields();
return meter.rateUnit();
}
@Override
public String eventType() {
update_fields();
return meter.eventType();
}
@Override
public long count() {
update_fields();
return meter.count();
}
@Override
public double fifteenMinuteRate() {
update_fields();
return meter.fifteenMinuteRate();
}
@Override
public double fiveMinuteRate() {
update_fields();
return meter.fiveMinuteRate();
}
@Override
public double meanRate() {
update_fields();
return meter.meanRate();
}
@Override
public double oneMinuteRate() {
update_fields();
return meter.oneMinuteRate();
}
}

11
src/main/java/com/yammer/metrics/core/HistogramValues.java
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@ -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[];
}