2015-06-03 18:42:29 +02:00
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Copyright 2015 Cloudius Systems
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*
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* Modified by Cloudius Systems
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*/
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package org.apache.cassandra.gms;
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import java.lang.management.ManagementFactory;
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import java.net.UnknownHostException;
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2016-08-17 10:32:00 +02:00
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import java.util.HashMap;
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import java.util.Map;
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2015-11-18 13:02:26 +01:00
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import javax.json.JsonArray;
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import javax.json.JsonObject;
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2016-08-17 10:32:00 +02:00
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import javax.json.JsonValue;
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2015-06-03 18:42:29 +02:00
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import javax.management.MBeanServer;
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import javax.management.ObjectName;
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2016-08-17 10:32:00 +02:00
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import javax.management.openmbean.CompositeData;
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import javax.management.openmbean.CompositeDataSupport;
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import javax.management.openmbean.CompositeType;
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import javax.management.openmbean.OpenDataException;
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import javax.management.openmbean.OpenType;
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import javax.management.openmbean.SimpleType;
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import javax.management.openmbean.TabularData;
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import javax.management.openmbean.TabularDataSupport;
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import javax.management.openmbean.TabularType;
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2015-06-03 18:42:29 +02:00
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2015-12-17 08:26:19 +01:00
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import com.scylladb.jmx.api.APIClient;
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2015-06-03 18:42:29 +02:00
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public class FailureDetector implements FailureDetectorMBean {
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public static final String MBEAN_NAME = "org.apache.cassandra.net:type=FailureDetector";
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private static final java.util.logging.Logger logger = java.util.logging.Logger
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.getLogger(FailureDetector.class.getName());
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private APIClient c = new APIClient();
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public void log(String str) {
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logger.finest(str);
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2015-06-03 18:42:29 +02:00
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}
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private static final FailureDetector instance = new FailureDetector();
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public static FailureDetector getInstance() {
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return instance;
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}
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private FailureDetector() {
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// Register this instance with JMX
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try {
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MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
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mbs.registerMBean(this, new ObjectName(MBEAN_NAME));
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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@Override
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public void dumpInterArrivalTimes() {
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log(" dumpInterArrivalTimes()");
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}
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2016-08-17 10:32:00 +02:00
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@Override
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public void setPhiConvictThreshold(double phi) {
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log(" setPhiConvictThreshold(double phi)");
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}
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@Override
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public double getPhiConvictThreshold() {
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log(" getPhiConvictThreshold()");
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return c.getDoubleValue("/failure_detector/phi");
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}
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@Override
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public String getAllEndpointStates() {
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log(" getAllEndpointStates()");
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StringBuilder sb = new StringBuilder();
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for (Map.Entry<String, EndpointState> entry : getEndpointStateMap().entrySet())
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{
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sb.append('/').append(entry.getKey()).append("\n");
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appendEndpointState(sb, entry.getValue());
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}
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return sb.toString();
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}
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private void appendEndpointState(StringBuilder sb, EndpointState endpointState)
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{
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sb.append(" generation:").append(endpointState.getHeartBeatState().getGeneration()).append("\n");
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sb.append(" heartbeat:").append(endpointState.getHeartBeatState().getHeartBeatVersion()).append("\n");
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for (Map.Entry<ApplicationState, String> state : endpointState.applicationState.entrySet())
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{
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if (state.getKey() == ApplicationState.TOKENS)
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continue;
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sb.append(" ").append(state.getKey()).append(":").append(state.getValue()).append("\n");
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}
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}
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public Map<String, EndpointState> getEndpointStateMap() {
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Map<String, EndpointState> res = new HashMap<String, EndpointState>();
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JsonArray arr = c.getJsonArray("/failure_detector/endpoints");
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for (int i = 0; i < arr.size(); i++) {
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JsonObject obj = arr.getJsonObject(i);
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EndpointState ep = new EndpointState(new HeartBeatState(obj.getInt("generation"), obj.getInt("version")));
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ep.setAliave(obj.getBoolean("is_alive"));
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ep.setUpdateTimestamp(obj.getJsonNumber("update_time").longValue());
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JsonArray states = obj.getJsonArray("application_state");
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for (int j = 0; j < states.size(); j++) {
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JsonObject state = states.getJsonObject(j);
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ep.addApplicationState(state.getInt("application_state"), state.getString("value"));
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}
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res.put(obj.getString("addrs"), ep);
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}
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return res;
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2015-06-03 18:42:29 +02:00
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}
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2016-08-17 10:32:00 +02:00
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@Override
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public String getEndpointState(String address) throws UnknownHostException {
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log(" getEndpointState(String address) throws UnknownHostException");
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return c.getStringValue("/failure_detector/endpoints/states/" + address);
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}
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2016-08-17 10:32:00 +02:00
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@Override
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public Map<String, String> getSimpleStates() {
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log(" getSimpleStates()");
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return c.getMapStrValue("/failure_detector/simple_states");
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}
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2016-08-17 10:32:00 +02:00
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@Override
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public int getDownEndpointCount() {
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log(" getDownEndpointCount()");
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return c.getIntValue("/failure_detector/count/endpoint/down");
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}
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2016-08-17 10:32:00 +02:00
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@Override
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public int getUpEndpointCount() {
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log(" getUpEndpointCount()");
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return c.getIntValue("/failure_detector/count/endpoint/up");
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}
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2016-08-17 10:32:00 +02:00
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// From origin:
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// this is useless except to provide backwards compatibility in phi_convict_threshold,
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// because everyone seems pretty accustomed to the default of 8, and users who have
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// already tuned their phi_convict_threshold for their own environments won't need to
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// change.
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private final double PHI_FACTOR = 1.0 / Math.log(10.0); // 0.434...
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@Override
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public TabularData getPhiValues() throws OpenDataException {
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final CompositeType ct = new CompositeType("Node", "Node", new String[] { "Endpoint", "PHI" },
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new String[] { "IP of the endpoint", "PHI value" },
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new OpenType[] { SimpleType.STRING, SimpleType.DOUBLE });
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final TabularDataSupport results = new TabularDataSupport(
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new TabularType("PhiList", "PhiList", ct, new String[] { "Endpoint" }));
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final JsonArray arr = c.getJsonArray("/failure_detector/endpoint_phi_values");
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for (JsonValue v : arr) {
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JsonObject o = (JsonObject) v;
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String endpoint = o.getString("endpoint");
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double phi = Double.parseDouble(o.getString("phi"));
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if (phi != Double.MIN_VALUE) {
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// returned values are scaled by PHI_FACTOR so that the are on
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// the same scale as PhiConvictThreshold
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final CompositeData data = new CompositeDataSupport(ct, new String[] { "Endpoint", "PHI" },
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new Object[] { endpoint, phi * PHI_FACTOR });
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results.put(data);
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}
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}
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return results;
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}
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}
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