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Posted to commits@activemq.apache.org by ra...@apache.org on 2008/10/07 14:32:02 UTC
svn commit: r702452 [1/2] - in /activemq/trunk: activemq-core/
activemq-core/src/test/java/org/apache/activemq/perf/
activemq-core/src/test/java/org/apache/activemq/transport/failover/
activemq-core/src/test/resources/ activemq-groups/ activemq-groups/...
Author: rajdavies
Date: Tue Oct 7 05:31:59 2008
New Revision: 702452
URL: http://svn.apache.org/viewvc?rev=702452&view=rev
Log:
added groups
Added:
activemq/trunk/activemq-groups/
activemq/trunk/activemq-groups/pom.xml (with props)
activemq/trunk/activemq-groups/src/
activemq/trunk/activemq-groups/src/main/
activemq/trunk/activemq-groups/src/main/java/
activemq/trunk/activemq-groups/src/main/java/org/
activemq/trunk/activemq-groups/src/main/java/org/apache/
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/DefaultMapChangedListener.java (with props)
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/Group.java (with props)
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/GroupMessageListener.java (with props)
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/GroupStateChangedListener.java (with props)
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/GroupUpdateException.java (with props)
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/Member.java (with props)
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/MemberChangedListener.java (with props)
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/command/
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/command/AsyncMapRequest.java (with props)
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/command/ElectionMessage.java (with props)
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/command/EntryKey.java (with props)
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/command/EntryMessage.java (with props)
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/command/EntryValue.java (with props)
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/command/MapRequest.java (with props)
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/command/RequestCallback.java (with props)
activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/package.html (with props)
activemq/trunk/activemq-groups/src/test/
activemq/trunk/activemq-groups/src/test/eclipse-resources/
activemq/trunk/activemq-groups/src/test/eclipse-resources/log4j.properties (with props)
activemq/trunk/activemq-groups/src/test/java/
activemq/trunk/activemq-groups/src/test/java/org/
activemq/trunk/activemq-groups/src/test/java/org/apache/
activemq/trunk/activemq-groups/src/test/java/org/apache/activegroups/
activemq/trunk/activemq-groups/src/test/java/org/apache/activegroups/GroupMemberTest.java (with props)
activemq/trunk/activemq-groups/src/test/java/org/apache/activegroups/GroupMessageTest.java (with props)
activemq/trunk/activemq-groups/src/test/java/org/apache/activegroups/GroupStateTest.java (with props)
Modified:
activemq/trunk/activemq-core/pom.xml
activemq/trunk/activemq-core/src/test/java/org/apache/activemq/perf/AMQStoreDurableTopicTest.java
activemq/trunk/activemq-core/src/test/java/org/apache/activemq/perf/SimpleDurableTopicTest.java
activemq/trunk/activemq-core/src/test/java/org/apache/activemq/transport/failover/AMQ1925Test.java
activemq/trunk/activemq-core/src/test/resources/log4j.properties
Modified: activemq/trunk/activemq-core/pom.xml
URL: http://svn.apache.org/viewvc/activemq/trunk/activemq-core/pom.xml?rev=702452&r1=702451&r2=702452&view=diff
==============================================================================
--- activemq/trunk/activemq-core/pom.xml (original)
+++ activemq/trunk/activemq-core/pom.xml Tue Oct 7 05:31:59 2008
@@ -449,8 +449,10 @@
<exclude>**/NetworkConnectionsCleanedupTest.*/**</exclude>
<exclude>**/amq1490/*</exclude>
+ <exclude>**/AMQ1925/*</exclude>
<exclude>**/archive/*</exclude>
<exclude>**/NetworkFailoverTest.*/**</exclude>
+
<exclude>**/AMQDeadlockTest3.*</exclude>
</excludes>
Modified: activemq/trunk/activemq-core/src/test/java/org/apache/activemq/perf/AMQStoreDurableTopicTest.java
URL: http://svn.apache.org/viewvc/activemq/trunk/activemq-core/src/test/java/org/apache/activemq/perf/AMQStoreDurableTopicTest.java?rev=702452&r1=702451&r2=702452&view=diff
==============================================================================
--- activemq/trunk/activemq-core/src/test/java/org/apache/activemq/perf/AMQStoreDurableTopicTest.java (original)
+++ activemq/trunk/activemq-core/src/test/java/org/apache/activemq/perf/AMQStoreDurableTopicTest.java Tue Oct 7 05:31:59 2008
@@ -30,8 +30,8 @@
dataFileDir.mkdirs();
answer.setDeleteAllMessagesOnStartup(true);
AMQPersistenceAdapter adaptor = new AMQPersistenceAdapter();
- adaptor.setArchiveDataLogs(true);
- adaptor.setMaxFileLength(1024 * 64);
+ //adaptor.setArchiveDataLogs(true);
+ //adaptor.setMaxFileLength(1024 * 64);
answer.setDataDirectoryFile(dataFileDir);
answer.setPersistenceAdapter(adaptor);
Modified: activemq/trunk/activemq-core/src/test/java/org/apache/activemq/perf/SimpleDurableTopicTest.java
URL: http://svn.apache.org/viewvc/activemq/trunk/activemq-core/src/test/java/org/apache/activemq/perf/SimpleDurableTopicTest.java?rev=702452&r1=702451&r2=702452&view=diff
==============================================================================
--- activemq/trunk/activemq-core/src/test/java/org/apache/activemq/perf/SimpleDurableTopicTest.java (original)
+++ activemq/trunk/activemq-core/src/test/java/org/apache/activemq/perf/SimpleDurableTopicTest.java Tue Oct 7 05:31:59 2008
@@ -30,8 +30,8 @@
public class SimpleDurableTopicTest extends SimpleTopicTest {
protected void setUp() throws Exception {
- numberOfDestinations=1;
- numberOfConsumers = 2;
+ numberOfDestinations=10;
+ numberOfConsumers = 10;
numberofProducers = 2;
sampleCount=1000;
playloadSize = 1024;
@@ -44,7 +44,7 @@
persistenceFactory.setPersistentIndex(true);
persistenceFactory.setCleanupInterval(10000);
answer.setPersistenceFactory(persistenceFactory);
- answer.setDeleteAllMessagesOnStartup(true);
+ //answer.setDeleteAllMessagesOnStartup(true);
answer.addConnector(uri);
answer.setUseShutdownHook(false);
}
@@ -63,7 +63,7 @@
protected ActiveMQConnectionFactory createConnectionFactory(String uri) throws Exception {
ActiveMQConnectionFactory result = super.createConnectionFactory(uri);
- result.setSendAcksAsync(false);
+ //result.setSendAcksAsync(false);
return result;
}
Modified: activemq/trunk/activemq-core/src/test/java/org/apache/activemq/transport/failover/AMQ1925Test.java
URL: http://svn.apache.org/viewvc/activemq/trunk/activemq-core/src/test/java/org/apache/activemq/transport/failover/AMQ1925Test.java?rev=702452&r1=702451&r2=702452&view=diff
==============================================================================
--- activemq/trunk/activemq-core/src/test/java/org/apache/activemq/transport/failover/AMQ1925Test.java (original)
+++ activemq/trunk/activemq-core/src/test/java/org/apache/activemq/transport/failover/AMQ1925Test.java Tue Oct 7 05:31:59 2008
@@ -60,7 +60,7 @@
private URI tcpUri;
private ActiveMQConnectionFactory cf;
- public void testAMQ1925_TXInProgress() throws Exception {
+ public void XtestAMQ1925_TXInProgress() throws Exception {
Connection connection = cf.createConnection();
connection.start();
Session session = connection.createSession(true,
@@ -372,8 +372,8 @@
protected void setUp() throws Exception {
bs = new BrokerService();
+ bs.setDeleteAllMessagesOnStartup(true);
bs.setPersistent(true);
- bs.deleteAllMessages();
bs.setUseJmx(true);
TransportConnector connector = bs.addConnector("tcp://localhost:0");
bs.start();
Modified: activemq/trunk/activemq-core/src/test/resources/log4j.properties
URL: http://svn.apache.org/viewvc/activemq/trunk/activemq-core/src/test/resources/log4j.properties?rev=702452&r1=702451&r2=702452&view=diff
==============================================================================
--- activemq/trunk/activemq-core/src/test/resources/log4j.properties (original)
+++ activemq/trunk/activemq-core/src/test/resources/log4j.properties Tue Oct 7 05:31:59 2008
@@ -18,7 +18,7 @@
#
# The logging properties used during tests..
#
-log4j.rootLogger=INFO, out
+log4j.rootLogger=INFO, out, stdout
log4j.logger.org.apache.activemq.spring=WARN
Added: activemq/trunk/activemq-groups/pom.xml
URL: http://svn.apache.org/viewvc/activemq/trunk/activemq-groups/pom.xml?rev=702452&view=auto
==============================================================================
--- activemq/trunk/activemq-groups/pom.xml (added)
+++ activemq/trunk/activemq-groups/pom.xml Tue Oct 7 05:31:59 2008
@@ -0,0 +1,93 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ 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.
+-->
+<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/maven-v4_0_0.xsd">
+ <modelVersion>4.0.0</modelVersion>
+
+ <parent>
+ <groupId>org.apache.activemq</groupId>
+ <artifactId>activemq-parent</artifactId>
+ <version>5.3-SNAPSHOT</version>
+ </parent>
+
+ <artifactId>activemq-groups</artifactId>
+ <packaging>bundle</packaging>
+ <name>ActiveMQ :: Groups</name>
+ <description>A JMS based collaboration framework</description>
+
+ <properties>
+ <activemq.osgi.import.pkg>*</activemq.osgi.import.pkg>
+ </properties>
+
+ <dependencies>
+ <dependency>
+ <groupId>org.apache.geronimo.specs</groupId>
+ <artifactId>geronimo-jms_1.1_spec</artifactId>
+ <version>1.1</version>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.activemq</groupId>
+ <artifactId>activemq-core</artifactId>
+ <version>5.2-SNAPSHOT</version>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.xbean</groupId>
+ <artifactId>xbean-spring</artifactId>
+ <version>3.3</version>
+ </dependency>
+ <dependency>
+ <groupId>org.springframework</groupId>
+ <artifactId>spring</artifactId>
+ <version>2.5.4</version>
+ </dependency>
+
+ <dependency>
+ <groupId>commons-logging</groupId>
+ <artifactId>commons-logging</artifactId>
+ <version>1.1.1</version>
+ <scope>test</scope>
+ </dependency>
+ <dependency>
+ <groupId>log4j</groupId>
+ <artifactId>log4j</artifactId>
+ <version>1.2.14</version>
+ <scope>test</scope>
+ </dependency>
+ <dependency>
+ <groupId>junit</groupId>
+ <artifactId>junit</artifactId>
+ <version>3.8.1</version>
+ <scope>test</scope>
+ </dependency>
+
+
+ </dependencies>
+
+ <build>
+ <plugins>
+ <plugin>
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-compiler-plugin</artifactId>
+ <configuration>
+ <source>1.5</source>
+ <target>1.5</target>
+ </configuration>
+ </plugin>
+ </plugins>
+ </build>
+
+</project>
Propchange: activemq/trunk/activemq-groups/pom.xml
------------------------------------------------------------------------------
svn:executable = *
Added: activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/DefaultMapChangedListener.java
URL: http://svn.apache.org/viewvc/activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/DefaultMapChangedListener.java?rev=702452&view=auto
==============================================================================
--- activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/DefaultMapChangedListener.java (added)
+++ activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/DefaultMapChangedListener.java Tue Oct 7 05:31:59 2008
@@ -0,0 +1,33 @@
+/**
+ * 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.activegroups;
+
+/**
+ * Default implementation of a MapChangedListener
+ *
+ */
+public class DefaultMapChangedListener implements GroupStateChangedListener{
+
+ public void mapInsert(Member owner, Object key, Object value) {
+ }
+
+ public void mapRemove(Member owner, Object key, Object value,boolean expired) {
+ }
+
+ public void mapUpdate(Member owner, Object key, Object oldValue,Object newValue) {
+ }
+}
Propchange: activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/DefaultMapChangedListener.java
------------------------------------------------------------------------------
svn:eol-style = native
Added: activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/Group.java
URL: http://svn.apache.org/viewvc/activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/Group.java?rev=702452&view=auto
==============================================================================
--- activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/Group.java (added)
+++ activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/Group.java Tue Oct 7 05:31:59 2008
@@ -0,0 +1,1836 @@
+/**
+ * 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.activegroups;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.Timer;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import javax.jms.Connection;
+import javax.jms.DeliveryMode;
+import javax.jms.Destination;
+import javax.jms.JMSException;
+import javax.jms.Message;
+import javax.jms.MessageConsumer;
+import javax.jms.MessageListener;
+import javax.jms.MessageProducer;
+import javax.jms.ObjectMessage;
+import javax.jms.Queue;
+import javax.jms.Session;
+import javax.jms.Topic;
+import org.apache.activegroups.command.AsyncMapRequest;
+import org.apache.activegroups.command.ElectionMessage;
+import org.apache.activegroups.command.EntryKey;
+import org.apache.activegroups.command.EntryMessage;
+import org.apache.activegroups.command.EntryValue;
+import org.apache.activegroups.command.MapRequest;
+import org.apache.activemq.ActiveMQMessageConsumer;
+import org.apache.activemq.Service;
+import org.apache.activemq.advisory.ConsumerEvent;
+import org.apache.activemq.advisory.ConsumerEventSource;
+import org.apache.activemq.advisory.ConsumerListener;
+import org.apache.activemq.thread.SchedulerTimerTask;
+import org.apache.activemq.util.IdGenerator;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+/**
+ * <P>
+ * A <CODE>Group</CODE> is a distributed collaboration implementation that is
+ * used to shared state and process messages amongst a distributed group of
+ * other <CODE>Group</CODE> instances. Membership of a group is handled
+ * automatically using discovery.
+ * <P>
+ * The underlying transport is JMS and there are some optimizations that occur
+ * for membership if used with ActiveMQ - but <CODE>Group</CODE> can be used
+ * with any JMS implementation.
+ *
+ * <P>
+ * Updates to the group shared map are controlled by a coordinator. The
+ * coordinator is elected by the member with the lowest lexicographical id -
+ * based on the bully algorithm [Silberschatz et al. 1993]
+ * <P>
+ * The {@link #selectCordinator(Collection<Member> members)} method may be
+ * overridden to implement a custom mechanism for choosing how the coordinator
+ * is elected for the map.
+ * <P>
+ * New <CODE>Group</CODE> instances have their state updated by the
+ * coordinator, and coordinator failure is handled automatically within the
+ * group.
+ * <P>
+ * All map updates are totally ordered through the coordinator, whilst read
+ * operations happen locally.
+ * <P>
+ * A <CODE>Group</CODE> supports the concept of owner only updates(write
+ * locks), shared updates, entry expiration times and removal on owner exit -
+ * all of which are optional. In addition, you can grab and release locks for
+ * values in the map, independently of who created them.
+ * <P>
+ * In addition, members of a group can broadcast messages and implement
+ * request/response with other <CODE>Group</CODE> instances.
+ *
+ * <P>
+ *
+ * @param <K>
+ * the key type
+ * @param <V>
+ * the value type
+ *
+ */
+public class Group<K, V> implements Map<K, V>, Service {
+ /**
+ * default interval within which to detect a member failure
+ */
+ public static final long DEFAULT_HEART_BEAT_INTERVAL = 1000;
+ private static final long EXPIRATION_SWEEP_INTERVAL = 500;
+ private static final Log LOG = LogFactory.getLog(Group.class);
+ private static final String STATE_PREFIX = "STATE." + Group.class.getName()
+ + ".";
+ private static final String GROUP_MESSAGE_PREFIX = "MESSAGE."
+ + Group.class.getName() + ".";
+ private static final String STATE_TYPE = "state";
+ private static final String MESSAGE_TYPE = "message";
+ private static final String MEMBER_ID_PROPERTY = "memberId";
+ protected Member local;
+ private final Object mapMutex = new Object();
+ private Map<K, EntryValue<V>> localMap;
+ Map<String, Member> members = new ConcurrentHashMap<String, Member>();
+ private Map<String, MapRequest> stateRequests = new HashMap<String, MapRequest>();
+ private Map<String, MapRequest> messageRequests = new HashMap<String, MapRequest>();
+ private List<MemberChangedListener> membershipListeners = new CopyOnWriteArrayList<MemberChangedListener>();
+ private List<GroupStateChangedListener> mapChangedListeners = new CopyOnWriteArrayList<GroupStateChangedListener>();
+ private List<GroupMessageListener> groupMessageListeners = new CopyOnWriteArrayList<GroupMessageListener>();
+ private Member coordinator;
+ private String groupName;
+ private boolean alwaysLock;
+ private Connection connection;
+ private Session stateSession;
+ private Session messageSession;
+ private Topic stateTopic;
+ private Topic heartBeatTopic;
+ private Topic inboxTopic;
+ private Topic messageTopic;
+ private Queue messageQueue;
+ private MessageProducer stateProducer;
+ private MessageProducer messageProducer;
+ private ConsumerEventSource consumerEvents;
+ private AtomicBoolean started = new AtomicBoolean();
+ private SchedulerTimerTask heartBeatTask;
+ private SchedulerTimerTask checkMembershipTask;
+ private SchedulerTimerTask expirationTask;
+ private Timer timer;
+ private long heartBeatInterval = DEFAULT_HEART_BEAT_INTERVAL;
+ private IdGenerator idGenerator = new IdGenerator();
+ private boolean removeOwnedObjectsOnExit;
+ private boolean releaseLockOnExit = true;
+ private int timeToLive;
+ private int lockTimeToLive;
+ private int minimumGroupSize = 1;
+ private int coordinatorWeight = 0;
+ private final AtomicBoolean electionFinished = new AtomicBoolean(true);
+ private ExecutorService stateExecutor;
+ private ExecutorService messageExecutor;
+ private ThreadPoolExecutor electionExecutor;
+ private final Object memberMutex = new Object();
+
+ /**
+ * @param connection
+ * @param name
+ */
+ public Group(Connection connection, String name) {
+ this(connection, "default", name);
+ }
+
+ /**
+ * @param connection
+ * @param groupName
+ * @param name
+ */
+ public Group(Connection connection, String groupName, String name) {
+ this.connection = connection;
+ this.local = new Member(name);
+ this.coordinator = this.local;
+ this.groupName = groupName;
+ }
+
+ /**
+ * Set the local map implementation to be used By default its a HashMap -
+ * but you could use a Cache for example
+ *
+ * @param map
+ */
+ public void setLocalMap(Map map) {
+ synchronized (this.mapMutex) {
+ this.localMap = map;
+ }
+ }
+
+ /**
+ * Start membership to the group
+ *
+ * @throws Exception
+ *
+ */
+ public void start() throws Exception {
+ if (this.started.compareAndSet(false, true)) {
+ synchronized (this.mapMutex) {
+ if (this.localMap == null) {
+ this.localMap = new HashMap<K, EntryValue<V>>();
+ }
+ }
+ this.connection.start();
+ this.stateSession = this.connection.createSession(false,
+ Session.AUTO_ACKNOWLEDGE);
+ this.messageSession = this.connection.createSession(false,
+ Session.AUTO_ACKNOWLEDGE);
+ this.stateProducer = this.stateSession.createProducer(null);
+ this.stateProducer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
+ this.inboxTopic = this.stateSession.createTemporaryTopic();
+ String stateTopicName = STATE_PREFIX + this.groupName;
+ this.stateTopic = this.stateSession.createTopic(stateTopicName);
+ this.heartBeatTopic = this.stateSession.createTopic(stateTopicName
+ + ".heartbeat");
+ String messageDestinationName = GROUP_MESSAGE_PREFIX
+ + this.groupName;
+ this.messageTopic = this.messageSession
+ .createTopic(messageDestinationName);
+ this.messageQueue = this.messageSession
+ .createQueue(messageDestinationName);
+ MessageConsumer privateInbox = this.messageSession
+ .createConsumer(this.inboxTopic);
+ MessageConsumer memberChangeConsumer = this.stateSession
+ .createConsumer(this.stateTopic);
+ String memberId = null;
+ if (memberChangeConsumer instanceof ActiveMQMessageConsumer) {
+ memberId = ((ActiveMQMessageConsumer) memberChangeConsumer)
+ .getConsumerId().toString();
+ } else {
+ memberId = this.idGenerator.generateId();
+ }
+ this.local.setId(memberId);
+ this.local.setInBoxDestination(this.inboxTopic);
+ this.local.setCoordinatorWeight(getCoordinatorWeight());
+ privateInbox.setMessageListener(new MessageListener() {
+ public void onMessage(Message message) {
+ processJMSMessage(message);
+ }
+ });
+ memberChangeConsumer.setMessageListener(new MessageListener() {
+ public void onMessage(Message message) {
+ processJMSMessage(message);
+ }
+ });
+ this.messageProducer = this.messageSession.createProducer(null);
+ this.messageProducer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
+ MessageConsumer topicMessageConsumer = this.messageSession
+ .createConsumer(this.messageTopic);
+ topicMessageConsumer.setMessageListener(new MessageListener() {
+ public void onMessage(Message message) {
+ processJMSMessage(message);
+ }
+ });
+ MessageConsumer queueMessageConsumer = this.messageSession
+ .createConsumer(this.messageQueue);
+ queueMessageConsumer.setMessageListener(new MessageListener() {
+ public void onMessage(Message message) {
+ processJMSMessage(message);
+ }
+ });
+ MessageConsumer heartBeatConsumer = this.stateSession
+ .createConsumer(this.heartBeatTopic);
+ heartBeatConsumer.setMessageListener(new MessageListener() {
+ public void onMessage(Message message) {
+ handleHeartbeats(message);
+ }
+ });
+ this.consumerEvents = new ConsumerEventSource(this.connection,
+ this.stateTopic);
+ this.consumerEvents.setConsumerListener(new ConsumerListener() {
+ public void onConsumerEvent(ConsumerEvent event) {
+ handleConsumerEvents(event);
+ }
+ });
+ this.consumerEvents.start();
+ this.electionExecutor = new ThreadPoolExecutor(1, 1, 0L,
+ TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>(),
+ new ThreadFactory() {
+ public Thread newThread(Runnable runnable) {
+ Thread thread = new Thread(runnable, "Election{"
+ + Group.this.local + "}");
+ thread.setDaemon(true);
+ return thread;
+ }
+ });
+ this.stateExecutor = Executors
+ .newSingleThreadExecutor(new ThreadFactory() {
+ public Thread newThread(Runnable runnable) {
+ Thread thread = new Thread(runnable, "Group State{"
+ + Group.this.local + "}");
+ thread.setDaemon(true);
+ return thread;
+ }
+ });
+ this.messageExecutor = Executors
+ .newSingleThreadExecutor(new ThreadFactory() {
+ public Thread newThread(Runnable runnable) {
+ Thread thread = new Thread(runnable,
+ "Group Messages{" + Group.this.local + "}");
+ thread.setDaemon(true);
+ return thread;
+ }
+ });
+ sendHeartBeat();
+ this.heartBeatTask = new SchedulerTimerTask(new Runnable() {
+ public void run() {
+ sendHeartBeat();
+ }
+ });
+ this.checkMembershipTask = new SchedulerTimerTask(new Runnable() {
+ public void run() {
+ checkMembership();
+ }
+ });
+ this.expirationTask = new SchedulerTimerTask(new Runnable() {
+ public void run() {
+ expirationSweep();
+ }
+ });
+ this.timer = new Timer("Distributed heart beat", true);
+ this.timer.scheduleAtFixedRate(this.heartBeatTask,
+ getHeartBeatInterval() / 3, getHeartBeatInterval() / 2);
+ this.timer.scheduleAtFixedRate(this.checkMembershipTask,
+ getHeartBeatInterval(), getHeartBeatInterval());
+ this.timer.scheduleAtFixedRate(this.expirationTask,
+ EXPIRATION_SWEEP_INTERVAL, EXPIRATION_SWEEP_INTERVAL);
+ // await for members to join
+ long timeout = (long) (this.heartBeatInterval
+ * this.minimumGroupSize *1.5);
+ long deadline = System.currentTimeMillis() + timeout;
+ while ((this.members.size() < this.minimumGroupSize || !this.electionFinished
+ .get())
+ && timeout > 0) {
+ synchronized (this.electionFinished) {
+ this.electionFinished.wait(timeout);
+ }
+ timeout = Math.max(deadline - System.currentTimeMillis(), 0);
+ }
+ }
+ }
+
+ /**
+ * stop membership to the group
+ *
+ * @throws Exception
+ */
+ public void stop() {
+ if (this.started.compareAndSet(true, false)) {
+ this.expirationTask.cancel();
+ this.checkMembershipTask.cancel();
+ this.heartBeatTask.cancel();
+ this.expirationTask.cancel();
+ this.timer.purge();
+ if (this.electionExecutor != null) {
+ this.electionExecutor.shutdownNow();
+ }
+ if (this.stateExecutor != null) {
+ this.stateExecutor.shutdownNow();
+ }
+ if (this.messageExecutor != null) {
+ this.messageExecutor.shutdownNow();
+ }
+ try {
+ this.consumerEvents.stop();
+ this.stateSession.close();
+ this.messageSession.close();
+ this.connection.close();
+ } catch (Exception e) {
+ LOG.debug("Caught exception stopping", e);
+ }
+
+ }
+ }
+
+ /**
+ * @return true if started
+ */
+ public boolean isStarted() {
+ return this.started.get();
+ }
+
+ /**
+ * @return true if there is elections have finished
+ */
+ public boolean isElectionFinished() {
+ return this.electionFinished.get();
+ }
+
+ void setElectionFinished(boolean flag) {
+ this.electionFinished.set(flag);
+ }
+
+ /**
+ * @return the partitionName
+ */
+ public String getGroupName() {
+ return this.groupName;
+ }
+
+ /**
+ * @return the name ofthis map
+ */
+ public String getName() {
+ return this.local.getName();
+ }
+
+ /**
+ * @return true if by default always lock objects (default is false)
+ */
+ public boolean isAlwaysLock() {
+ return this.alwaysLock;
+ }
+
+ /**
+ * @param alwaysLock -
+ * set true if objects inserted will always be locked (default is
+ * false)
+ */
+ public void setAlwaysLock(boolean alwaysLock) {
+ this.alwaysLock = alwaysLock;
+ }
+
+ /**
+ * @return the heartBeatInterval
+ */
+ public long getHeartBeatInterval() {
+ return this.heartBeatInterval;
+ }
+
+ /**
+ * @param heartBeatInterval
+ * the heartBeatInterval to set
+ */
+ public void setHeartBeatInterval(long heartBeatInterval) {
+ this.heartBeatInterval = heartBeatInterval;
+ }
+
+ /**
+ * Add a listener for membership changes
+ *
+ * @param l
+ */
+ public void addMemberChangedListener(MemberChangedListener l) {
+ this.membershipListeners.add(l);
+ }
+
+ /**
+ * Remove a listener for membership changes
+ *
+ * @param l
+ */
+ public void removeMemberChangedListener(MemberChangedListener l) {
+ this.membershipListeners.remove(l);
+ }
+
+ /**
+ * Add a listener for map changes
+ *
+ * @param l
+ */
+ public void addMapChangedListener(GroupStateChangedListener l) {
+ this.mapChangedListeners.add(l);
+ }
+
+ /**
+ * Remove a listener for map changes
+ *
+ * @param l
+ */
+ public void removeMapChangedListener(GroupStateChangedListener l) {
+ this.mapChangedListeners.remove(l);
+ }
+
+ /**
+ * Add a listener for group messages
+ *
+ * @param l
+ */
+ public void addGroupMessageListener(GroupMessageListener l) {
+ this.groupMessageListeners.add(l);
+ }
+
+ /**
+ * remove a listener for group messages
+ *
+ * @param l
+ */
+ public void removeGroupMessageListener(GroupMessageListener l) {
+ this.groupMessageListeners.remove(l);
+ }
+
+ /**
+ * @return the timeToLive
+ */
+ public int getTimeToLive() {
+ return this.timeToLive;
+ }
+
+ /**
+ * @param timeToLive
+ * the timeToLive to set
+ */
+ public void setTimeToLive(int timeToLive) {
+ this.timeToLive = timeToLive;
+ }
+
+ /**
+ * @return the removeOwnedObjectsOnExit
+ */
+ public boolean isRemoveOwnedObjectsOnExit() {
+ return this.removeOwnedObjectsOnExit;
+ }
+
+ /**
+ * Sets the policy for owned objects in the group If set to true, when this
+ * <code>GroupMap<code> stops,
+ * any objects it owns will be removed from the group map
+ * @param removeOwnedObjectsOnExit the removeOwnedObjectsOnExit to set
+ */
+ public void setRemoveOwnedObjectsOnExit(boolean removeOwnedObjectsOnExit) {
+ this.removeOwnedObjectsOnExit = removeOwnedObjectsOnExit;
+ }
+
+ /**
+ * @return releaseLockOnExit - true by default
+ */
+ public boolean isReleaseLockOnExit() {
+ return releaseLockOnExit;
+ }
+
+ /**
+ * set release lock on exit - true by default
+ *
+ * @param releaseLockOnExit
+ * the releaseLockOnExit to set
+ */
+ public void setReleaseLockOnExit(boolean releaseLockOnExit) {
+ this.releaseLockOnExit = releaseLockOnExit;
+ }
+
+ /**
+ * @return the lockTimeToLive
+ */
+ public int getLockTimeToLive() {
+ return lockTimeToLive;
+ }
+
+ /**
+ * @param lockTimeToLive
+ * the lockTimeToLive to set
+ */
+ public void setLockTimeToLive(int lockTimeToLive) {
+ this.lockTimeToLive = lockTimeToLive;
+ }
+
+ /**
+ * @return the minimumGroupSize
+ */
+ public int getMinimumGroupSize() {
+ return this.minimumGroupSize;
+ }
+
+ /**
+ * @param minimumGroupSize
+ * the minimumGroupSize to set
+ */
+ public void setMinimumGroupSize(int minimumGroupSize) {
+ this.minimumGroupSize = minimumGroupSize;
+ }
+
+ /**
+ * @return the coordinatorWeight
+ */
+ public int getCoordinatorWeight() {
+ return this.coordinatorWeight;
+ }
+
+ /**
+ * @param coordinatorWeight
+ * the coordinatorWeight to set
+ */
+ public void setCoordinatorWeight(int coordinatorWeight) {
+ this.coordinatorWeight = coordinatorWeight;
+ }
+
+ /**
+ * clear entries from the Map
+ *
+ * @throws IllegalStateException
+ */
+ public void clear() throws IllegalStateException {
+ checkStatus();
+ if (this.localMap != null && !this.localMap.isEmpty()) {
+ Set<K> keys = null;
+ synchronized (this.mapMutex) {
+ keys = new HashSet<K>(this.localMap.keySet());
+ }
+ for (K key : keys) {
+ remove(key);
+ }
+ }
+ this.localMap.clear();
+ }
+
+ public boolean containsKey(Object key) {
+ synchronized (this.mapMutex) {
+ return this.localMap != null ? this.localMap.containsKey(key)
+ : false;
+ }
+ }
+
+ public boolean containsValue(Object value) {
+ EntryValue entryValue = new EntryValue(null, value);
+ synchronized (this.mapMutex) {
+ return this.localMap != null ? this.localMap
+ .containsValue(entryValue) : false;
+ }
+ }
+
+ public Set<java.util.Map.Entry<K, V>> entrySet() {
+ Map<K, V> result = new HashMap<K, V>();
+ synchronized (this.mapMutex) {
+ if (this.localMap != null) {
+ for (EntryValue<V> entry : this.localMap.values()) {
+ result.put((K) entry.getKey(), entry.getValue());
+ }
+ }
+ }
+ return result.entrySet();
+ }
+
+ public V get(Object key) {
+ EntryValue<V> value = null;
+ synchronized (this.mapMutex) {
+ value = this.localMap != null ? this.localMap.get(key) : null;
+ }
+ return value != null ? value.getValue() : null;
+ }
+
+ public boolean isEmpty() {
+ synchronized (this.mapMutex) {
+ return this.localMap != null ? this.localMap.isEmpty() : true;
+ }
+ }
+
+ public Set<K> keySet() {
+ Set<K> result = null;
+ synchronized (this.mapMutex) {
+ result = new HashSet<K>(this.localMap.keySet());
+ }
+ return result;
+ }
+
+ /**
+ * Puts an value into the map associated with the key
+ *
+ * @param key
+ * @param value
+ * @return the old value or null
+ * @throws GroupUpdateException
+ * @throws IllegalStateException
+ *
+ */
+ public V put(K key, V value) throws GroupUpdateException,
+ IllegalStateException {
+ return put(key, value, isAlwaysLock(), isRemoveOwnedObjectsOnExit(),
+ isReleaseLockOnExit(), getTimeToLive(), getLockTimeToLive());
+ }
+
+ /**
+ * Puts an value into the map associated with the key
+ *
+ * @param key
+ * @param value
+ * @param lock
+ * @param removeOnExit
+ * @param releaseLockOnExit
+ * @param timeToLive
+ * @param leaseTime
+ * @return the old value or null
+ * @throws GroupUpdateException
+ * @throws IllegalStateException
+ *
+ */
+ public V put(K key, V value, boolean lock, boolean removeOnExit,
+ boolean releaseLockOnExit, long timeToLive, long leaseTime)
+ throws GroupUpdateException, IllegalStateException {
+ checkStatus();
+ EntryKey<K> entryKey = new EntryKey<K>(this.local, key);
+ entryKey.setLocked(lock);
+ entryKey.setRemoveOnExit(removeOnExit);
+ entryKey.setReleaseLockOnExit(releaseLockOnExit);
+ entryKey.setTimeToLive(timeToLive);
+ entryKey.setLockLeaseTime(leaseTime);
+ EntryMessage entryMsg = new EntryMessage();
+ entryMsg.setKey(entryKey);
+ entryMsg.setValue(value);
+ entryMsg.setType(EntryMessage.MessageType.INSERT);
+ return (V) sendStateRequest(getCoordinator(), entryMsg);
+ }
+
+ /**
+ * Remove a lock on a key
+ *
+ * @param key
+ * @throws GroupUpdateException
+ */
+ public void unlock(K key) throws GroupUpdateException {
+ EntryKey<K> entryKey = new EntryKey<K>(this.local, key);
+ entryKey.setLocked(false);
+ EntryMessage entryMsg = new EntryMessage();
+ entryMsg.setKey(entryKey);
+ entryMsg.setLockUpdate(true);
+ sendStateRequest(getCoordinator(), entryMsg);
+ }
+
+ /**
+ * Lock a key in the distributed map
+ *
+ * @param key
+ * @throws GroupUpdateException
+ */
+ public void lock(K key) throws GroupUpdateException {
+ lock(key, getLockTimeToLive());
+ }
+
+ /**
+ * Lock a key in the distributed map
+ *
+ * @param key
+ * @param leaseTime
+ * @throws GroupUpdateException
+ */
+ public void lock(K key, long leaseTime) throws GroupUpdateException {
+ EntryKey<K> entryKey = new EntryKey<K>(this.local, key);
+ entryKey.setLocked(true);
+ entryKey.setLockLeaseTime(leaseTime);
+ EntryMessage entryMsg = new EntryMessage();
+ entryMsg.setKey(entryKey);
+ entryMsg.setLockUpdate(true);
+ sendStateRequest(getCoordinator(), entryMsg);
+ }
+
+ /**
+ * Add the Map to the distribution
+ *
+ * @param t
+ * @throws GroupUpdateException
+ * @throws IllegalStateException
+ */
+ public void putAll(Map<? extends K, ? extends V> t)
+ throws GroupUpdateException, IllegalStateException {
+ putAll(t, isAlwaysLock(), isRemoveOwnedObjectsOnExit(),
+ isReleaseLockOnExit(), getTimeToLive(), getLockTimeToLive());
+ }
+
+ /**
+ * Add the Map to the distribution
+ *
+ * @param t
+ * @param lock
+ * @param removeOnExit
+ * @param releaseLockOnExit
+ * @param timeToLive
+ * @param lockTimeToLive
+ * @throws GroupUpdateException
+ * @throws IllegalStateException
+ */
+ public void putAll(Map<? extends K, ? extends V> t, boolean lock,
+ boolean removeOnExit, boolean releaseLockOnExit, long timeToLive,
+ long lockTimeToLive) throws GroupUpdateException,
+ IllegalStateException {
+ for (java.util.Map.Entry<? extends K, ? extends V> entry : t.entrySet()) {
+ put(entry.getKey(), entry.getValue(), lock, removeOnExit,
+ releaseLockOnExit, timeToLive, lockTimeToLive);
+ }
+ }
+
+ /**
+ * remove a value from the map associated with the key
+ *
+ * @param key
+ * @return the Value or null
+ * @throws GroupUpdateException
+ * @throws IllegalStateException
+ *
+ */
+ public V remove(Object key) throws GroupUpdateException,
+ IllegalStateException {
+ EntryKey<K> entryKey = new EntryKey<K>(this.local, (K) key);
+ return doRemove(entryKey);
+ }
+
+ V doRemove(EntryKey<K> key) throws GroupUpdateException,
+ IllegalStateException {
+ checkStatus();
+ EntryMessage entryMsg = new EntryMessage();
+ entryMsg.setKey(key);
+ entryMsg.setType(EntryMessage.MessageType.DELETE);
+ return (V) sendStateRequest(getCoordinator(), entryMsg);
+ }
+
+ public int size() {
+ synchronized (this.mapMutex) {
+ return this.localMap != null ? this.localMap.size() : 0;
+ }
+ }
+
+ public Collection<V> values() {
+ List<V> result = new ArrayList<V>();
+ synchronized (this.mapMutex) {
+ if (this.localMap != null) {
+ for (EntryValue<V> value : this.localMap.values()) {
+ result.add(value.getValue());
+ }
+ }
+ }
+ return result;
+ }
+
+ /**
+ * @return a set of the members
+ */
+ public Set<Member> getMembers() {
+ Set<Member> result = new HashSet<Member>();
+ result.addAll(this.members.values());
+ return result;
+ }
+
+ /**
+ * Get a member by its unique id
+ *
+ * @param id
+ * @return
+ */
+ public Member getMemberById(String id) {
+ return this.members.get(id);
+ }
+
+ /**
+ * Return a member of the Group with the matching name
+ *
+ * @param name
+ * @return
+ */
+ public Member getMemberByName(String name) {
+ if (name != null) {
+ for (Member member : this.members.values()) {
+ if (member.getName().equals(name)) {
+ return member;
+ }
+ }
+ }
+ return null;
+ }
+
+ /**
+ * @return the local member that represents this <CODE>Group</CODE>
+ * instance
+ */
+ public Member getLocalMember() {
+ return this.local;
+ }
+
+ /**
+ * @param key
+ * @return true if this is the owner of the key
+ */
+ public boolean isOwner(K key) {
+ EntryValue<V> entryValue = null;
+ synchronized (this.mapMutex) {
+ entryValue = this.localMap != null ? this.localMap.get(key) : null;
+ }
+ boolean result = false;
+ if (entryValue != null) {
+ result = entryValue.getKey().getOwner().getId().equals(
+ this.local.getId());
+ }
+ return result;
+ }
+
+ /**
+ * Get the owner of a key
+ *
+ * @param key
+ * @return the owner - or null if the key doesn't exist
+ */
+ EntryKey getKey(Object key) {
+ EntryValue<V> entryValue = null;
+ synchronized (this.mapMutex) {
+ entryValue = this.localMap != null ? this.localMap.get(key) : null;
+ }
+ return entryValue != null ? entryValue.getKey() : null;
+ }
+
+ /**
+ * @return true if the coordinator for the map
+ */
+ protected boolean isCoordinator() {
+ return isCoordinatorMatch() && this.electionFinished.get();
+ }
+
+ /**
+ * @return true if the coordinator for the map
+ */
+ protected boolean isCoordinatorMatch() {
+ return this.local.equals(this.coordinator);
+ }
+
+ /**
+ * @return the coordinator
+ */
+ public Member getCoordinator() {
+ return this.coordinator;
+ }
+
+ void setCoordinator(Member member) {
+ this.coordinator = member;
+ }
+
+ /**
+ * Broadcast a message to the group
+ *
+ * @param message
+ * @throws JMSException
+ */
+ public void broadcastMessage(Object message) throws JMSException {
+ checkStatus();
+ ObjectMessage objMsg = this.messageSession
+ .createObjectMessage((Serializable) message);
+ objMsg.setJMSCorrelationID(this.idGenerator.generateId());
+ objMsg.setJMSType(MESSAGE_TYPE);
+ objMsg.setStringProperty(MEMBER_ID_PROPERTY, this.local.getId());
+ this.messageProducer.send(this.messageTopic, objMsg);
+ }
+
+ /**
+ * As the group for a response - one will be selected from the group
+ *
+ * @param member
+ * @param message
+ * @param timeout
+ * in milliseconds - a value if 0 means wait until complete
+ * @return
+ * @throws JMSException
+ */
+ public Serializable broadcastMessageRequest(Object message, long timeout)
+ throws JMSException {
+ checkStatus();
+ Object result = null;
+ MapRequest request = new MapRequest();
+ String id = this.idGenerator.generateId();
+ synchronized (this.messageRequests) {
+ this.messageRequests.put(id, request);
+ }
+ ObjectMessage objMsg = this.stateSession
+ .createObjectMessage((Serializable) message);
+ objMsg.setJMSReplyTo(this.inboxTopic);
+ objMsg.setJMSCorrelationID(id);
+ objMsg.setJMSType(MESSAGE_TYPE);
+ objMsg.setStringProperty(MEMBER_ID_PROPERTY, this.local.getId());
+ this.messageProducer.send(this.messageQueue, objMsg);
+ result = request.get(timeout);
+ return (Serializable) result;
+ }
+
+ /**
+ * Send a message to the group - but only the least loaded member will
+ * process it
+ *
+ * @param message
+ * @throws JMSException
+ */
+ public void sendMessage(Object message) throws JMSException {
+ checkStatus();
+ ObjectMessage objMsg = this.messageSession
+ .createObjectMessage((Serializable) message);
+ objMsg.setJMSCorrelationID(this.idGenerator.generateId());
+ objMsg.setJMSType(MESSAGE_TYPE);
+ objMsg.setStringProperty(MEMBER_ID_PROPERTY, this.local.getId());
+ this.messageProducer.send(this.messageQueue, objMsg);
+ }
+
+ /**
+ * Send a message to an individual member
+ *
+ * @param member
+ * @param message
+ * @throws JMSException
+ */
+ public void sendMessage(Member member, Object message) throws JMSException {
+ checkStatus();
+ ObjectMessage objMsg = this.messageSession
+ .createObjectMessage((Serializable) message);
+ objMsg.setJMSCorrelationID(this.idGenerator.generateId());
+ objMsg.setJMSType(MESSAGE_TYPE);
+ objMsg.setStringProperty(MEMBER_ID_PROPERTY, this.local.getId());
+ this.messageProducer.send(member.getInBoxDestination(), objMsg);
+ }
+
+ /**
+ * Send a request to a member
+ *
+ * @param member
+ * @param message
+ * @param timeout
+ * in milliseconds - a value if 0 means wait until complete
+ * @return the request or null
+ * @throws JMSException
+ */
+ public Object sendMessageRequest(Member member, Object message, long timeout)
+ throws JMSException {
+ checkStatus();
+ Object result = null;
+ MapRequest request = new MapRequest();
+ String id = this.idGenerator.generateId();
+ synchronized (this.messageRequests) {
+ this.messageRequests.put(id, request);
+ }
+ ObjectMessage objMsg = this.stateSession
+ .createObjectMessage((Serializable) message);
+ objMsg.setJMSReplyTo(this.inboxTopic);
+ objMsg.setJMSCorrelationID(id);
+ objMsg.setJMSType(MESSAGE_TYPE);
+ objMsg.setStringProperty(MEMBER_ID_PROPERTY, this.local.getId());
+ this.messageProducer.send(member.getInBoxDestination(), objMsg);
+ result = request.get(timeout);
+ return result;
+ }
+
+ /**
+ * send a response to a message
+ *
+ * @param member
+ * @param replyId
+ * @param message
+ * @throws JMSException
+ */
+ public void sendMessageResponse(Member member, String replyId,
+ Object message) throws JMSException {
+ checkStatus();
+ ObjectMessage objMsg = this.messageSession
+ .createObjectMessage((Serializable) message);
+ objMsg.setJMSCorrelationID(replyId);
+ objMsg.setJMSType(MESSAGE_TYPE);
+ objMsg.setStringProperty(MEMBER_ID_PROPERTY, this.local.getId());
+ this.messageProducer.send(member.getInBoxDestination(), objMsg);
+ }
+
+ /**
+ * Select a coordinator - coordinator weighting is used - or if everything
+ * is equal - a comparison of member ids.
+ *
+ * @param members
+ * @return
+ */
+ protected Member selectCordinator(List<Member> list) {
+ List<Member> sorted = sortMemberList(list);
+ Member result = sorted.isEmpty() ? this.local : sorted
+ .get(list.size() - 1);
+ return result;
+ }
+
+ protected List<Member> sortMemberList(List<Member> list) {
+ Collections.sort(list, new Comparator<Member>() {
+ public int compare(Member m1, Member m2) {
+ int result = m1.getCoordinatorWeight()
+ - m2.getCoordinatorWeight();
+ if (result == 0) {
+ result = m1.getId().compareTo(m2.getId());
+ }
+ return result;
+ }
+ });
+ return list;
+ }
+
+ Object sendStateRequest(Member member, Serializable payload) {
+ Object result = null;
+ MapRequest request = new MapRequest();
+ String id = this.idGenerator.generateId();
+ synchronized (this.stateRequests) {
+ this.stateRequests.put(id, request);
+ }
+ try {
+ ObjectMessage objMsg = this.stateSession
+ .createObjectMessage(payload);
+ objMsg.setJMSReplyTo(this.inboxTopic);
+ objMsg.setJMSCorrelationID(id);
+ objMsg.setJMSType(STATE_TYPE);
+ this.stateProducer.send(member.getInBoxDestination(), objMsg);
+ result = request.get(getHeartBeatInterval());
+ } catch (JMSException e) {
+ if (this.started.get()) {
+ LOG.error("Failed to send request " + payload, e);
+ }
+ }
+ if (result instanceof GroupUpdateException) {
+ throw (GroupUpdateException) result;
+ }
+ if (result instanceof EntryMessage) {
+ EntryMessage entryMsg = (EntryMessage) result;
+ result = entryMsg.getOldValue();
+ }
+ return result;
+ }
+
+ void sendAsyncStateRequest(AsyncMapRequest asyncRequest, Member member,
+ Serializable payload) {
+ MapRequest request = new MapRequest();
+ String id = this.idGenerator.generateId();
+ asyncRequest.add(id, request);
+ synchronized (this.stateRequests) {
+ this.stateRequests.put(id, request);
+ }
+ try {
+ ObjectMessage objMsg = this.stateSession
+ .createObjectMessage(payload);
+ objMsg.setJMSReplyTo(this.inboxTopic);
+ objMsg.setJMSCorrelationID(id);
+ objMsg.setJMSType(STATE_TYPE);
+ this.stateProducer.send(member.getInBoxDestination(), objMsg);
+ } catch (JMSException e) {
+ if (this.started.get()) {
+ LOG.error("Failed to send async request " + payload, e);
+ }
+ }
+ }
+
+ void sendReply(Object reply, Destination replyTo, String id) {
+ if (this.started.get()) {
+ if (replyTo != null) {
+ if (replyTo.equals(this.local.getInBoxDestination())) {
+ processRequest(id, reply);
+ } else {
+ try {
+ ObjectMessage replyMsg = this.stateSession
+ .createObjectMessage((Serializable) reply);
+ replyMsg.setJMSCorrelationID(id);
+ replyMsg.setJMSType(STATE_TYPE);
+ this.stateProducer.send(replyTo, replyMsg);
+ } catch (JMSException e) {
+ LOG.error("Couldn't send reply from co-ordinator", e);
+ }
+ }
+ } else {
+ LOG.error("NULL replyTo destination");
+ }
+ }
+ }
+
+ void broadcastMapUpdate(EntryMessage entry, String correlationId) {
+ if (this.started.get()) {
+ try {
+ EntryMessage copy = entry.copy();
+ copy.setMapUpdate(true);
+ ObjectMessage objMsg = this.stateSession
+ .createObjectMessage(copy);
+ objMsg.setJMSCorrelationID(correlationId);
+ objMsg.setJMSType(STATE_TYPE);
+ this.stateProducer.send(this.stateTopic, objMsg);
+ } catch (JMSException e) {
+ if (this.started.get()) {
+ LOG.error("Failed to send EntryMessage " + entry, e);
+ }
+ }
+ }
+ }
+
+ void processJMSMessage(Message message) {
+ if (message instanceof ObjectMessage) {
+ ObjectMessage objMsg = (ObjectMessage) message;
+ try {
+ String messageType = objMsg.getJMSType();
+ String id = objMsg.getJMSCorrelationID();
+ String memberId = objMsg.getStringProperty(MEMBER_ID_PROPERTY);
+ Destination replyTo = objMsg.getJMSReplyTo();
+ Object payload = objMsg.getObject();
+ if (messageType != null) {
+ if (messageType.equals(STATE_TYPE)) {
+ if (payload instanceof Member) {
+ handleHeartbeats((Member) payload);
+ } else if (payload instanceof EntryMessage) {
+ EntryMessage entryMsg = (EntryMessage) payload;
+ entryMsg = entryMsg.copy();
+ if (entryMsg.isLockUpdate()) {
+ processLockUpdate(entryMsg, replyTo, id);
+ } else if (entryMsg.isMapUpdate()) {
+ processMapUpdate(entryMsg);
+ } else {
+ processEntryMessage(entryMsg, replyTo, id);
+ }
+ } else if (payload instanceof ElectionMessage) {
+ ElectionMessage electionMsg = (ElectionMessage) payload;
+ electionMsg = electionMsg.copy();
+ processElectionMessage(electionMsg, replyTo, id);
+ }
+ } else if (messageType.equals(MESSAGE_TYPE)) {
+ processGroupMessage(memberId, id, replyTo, payload);
+ } else {
+ LOG.error("Unknown message type: " + messageType);
+ }
+ processRequest(id, payload);
+ } else {
+ LOG.error("Can't process a message type of null");
+ }
+ } catch (JMSException e) {
+ LOG.warn("Failed to process message: " + message, e);
+ }
+ }
+ }
+
+ void processRequest(String id, Object value) {
+ if (id != null) {
+ MapRequest result = null;
+ synchronized (this.stateRequests) {
+ result = this.stateRequests.remove(id);
+ }
+ if (result != null) {
+ result.put(id, value);
+ }
+ }
+ }
+
+ void processLockUpdate(EntryMessage entryMsg, Destination replyTo,
+ String correlationId) {
+ waitForElection();
+ synchronized (this.mapMutex) {
+ boolean newLock = entryMsg.getKey().isLocked();
+ Member newOwner = entryMsg.getKey().getOwner();
+ long newLockExpiration = newLock ? entryMsg.getKey()
+ .getLockExpiration() : 0l;
+ if (isCoordinator() && !entryMsg.isMapUpdate()) {
+ EntryKey originalKey = getKey(entryMsg.getKey().getKey());
+ if (originalKey != null) {
+ if (originalKey.isLocked()) {
+ if (!originalKey.getOwner().equals(
+ entryMsg.getKey().getOwner())) {
+ Serializable reply = new GroupUpdateException(
+ "Owned by " + originalKey.getOwner());
+ sendReply(reply, replyTo, correlationId);
+ } else {
+ originalKey.setLocked(newLock);
+ originalKey.setOwner(newOwner);
+ originalKey.setLockExpiration(newLockExpiration);
+ broadcastMapUpdate(entryMsg, correlationId);
+ }
+ } else {
+ originalKey.setLocked(newLock);
+ originalKey.setOwner(newOwner);
+ originalKey.setLockExpiration(newLockExpiration);
+ broadcastMapUpdate(entryMsg, correlationId);
+ }
+ }
+ } else {
+ EntryKey originalKey = getKey(entryMsg.getKey().getKey());
+ if (originalKey != null) {
+ originalKey.setLocked(newLock);
+ originalKey.setOwner(newOwner);
+ originalKey.setLockExpiration(newLockExpiration);
+ }
+ }
+ }
+ }
+
+ void processEntryMessage(EntryMessage entryMsg, Destination replyTo,
+ String correlationId) {
+ waitForElection();
+ if (isCoordinator()) {
+ EntryKey<K> key = entryMsg.getKey();
+ EntryValue<V> value = new EntryValue<V>(key, (V) entryMsg
+ .getValue());
+ boolean insert = entryMsg.isInsert();
+ boolean containsKey = false;
+ synchronized (this.mapMutex) {
+ containsKey = this.localMap.containsKey(key.getKey());
+ }
+ if (containsKey) {
+ EntryKey originalKey = getKey(key.getKey());
+ if (originalKey.equals(key.getOwner())
+ || !originalKey.isLocked()) {
+ EntryValue<V> old = null;
+ if (insert) {
+ synchronized (this.mapMutex) {
+ old = this.localMap.put(key.getKey(), value);
+ }
+ } else {
+ synchronized (this.mapMutex) {
+ old = this.localMap.remove(key.getKey());
+ }
+ }
+ entryMsg.setOldValue(old.getValue());
+ broadcastMapUpdate(entryMsg, correlationId);
+ fireMapChanged(key.getOwner(), key.getKey(),
+ old.getValue(), value.getValue(), false);
+ } else {
+ Serializable reply = new GroupUpdateException(
+ "Owned by " + originalKey.getOwner());
+ sendReply(reply, replyTo, correlationId);
+ }
+ } else {
+ if (insert) {
+ synchronized (this.mapMutex) {
+ this.localMap.put(key.getKey(), value);
+ }
+ broadcastMapUpdate(entryMsg, correlationId);
+ fireMapChanged(key.getOwner(), key.getKey(), null, value
+ .getValue(), false);
+ } else {
+ sendReply(null, replyTo, correlationId);
+ }
+ }
+ }
+ }
+
+ void processMapUpdate(EntryMessage entryMsg) {
+ boolean containsKey = false;
+ EntryKey<K> key = entryMsg.getKey();
+ EntryValue<V> value = new EntryValue<V>(key, (V) entryMsg.getValue());
+ boolean insert = entryMsg.isInsert() || entryMsg.isSync();
+ synchronized (this.mapMutex) {
+ containsKey = this.localMap.containsKey(key.getKey());
+ }
+ waitForElection();
+ if (!isCoordinator() || entryMsg.isSync()) {
+ if (containsKey) {
+ if (key.isLockExpired()) {
+ EntryValue old = this.localMap.get(key.getKey());
+ if (old != null) {
+ old.getKey().setLocked(false);
+ }
+ } else {
+ EntryValue<V> old = null;
+ if (insert) {
+ synchronized (this.mapMutex) {
+ old = this.localMap.put(key.getKey(), value);
+ }
+ } else {
+ synchronized (this.mapMutex) {
+ old = this.localMap.remove(key.getKey());
+ value.setValue(null);
+ }
+ }
+ fireMapChanged(key.getOwner(), key.getKey(),
+ old.getValue(), value.getValue(), entryMsg
+ .isExpired());
+ }
+ } else {
+ if (insert) {
+ synchronized (this.mapMutex) {
+ this.localMap.put(key.getKey(), value);
+ }
+ fireMapChanged(key.getOwner(), key.getKey(), null, value
+ .getValue(), false);
+ }
+ }
+ }
+ }
+
+ void processGroupMessage(String memberId, String replyId,
+ Destination replyTo, Object payload) {
+ Member member = this.members.get(memberId);
+ if (member != null) {
+ fireMemberMessage(member, replyId, payload);
+ }
+ if (replyId != null) {
+ MapRequest result = null;
+ synchronized (this.messageRequests) {
+ result = this.messageRequests.remove(replyId);
+ }
+ if (result != null) {
+ result.put(replyId, payload);
+ }
+ }
+ }
+
+ void handleHeartbeats(Message message) {
+ try {
+ if (message instanceof ObjectMessage) {
+ ObjectMessage objMsg = (ObjectMessage) message;
+ Member member = (Member) objMsg.getObject();
+ handleHeartbeats(member);
+ } else {
+ LOG.warn("Unexpected message: " + message);
+ }
+ } catch (JMSException e) {
+ LOG.warn("Failed to handle heart beat", e);
+ }
+ }
+
+ void handleHeartbeats(Member member) {
+ member.setTimeStamp(System.currentTimeMillis());
+ if (this.members.put(member.getId(), member) == null) {
+ fireMemberStarted(member);
+ if (!member.equals(this.local)) {
+ sendHeartBeat(member.getInBoxDestination());
+ }
+ election(member, true);
+ synchronized (this.memberMutex) {
+ this.memberMutex.notifyAll();
+ }
+ }
+ }
+
+ void handleConsumerEvents(ConsumerEvent event) {
+ if (!event.isStarted()) {
+ Member member = this.members.remove(event.getConsumerId()
+ .toString());
+ if (member != null) {
+ fireMemberStopped(member);
+ election(member, false);
+ }
+ }
+ }
+
+ void checkMembership() {
+ if (this.started.get() && this.electionFinished.get()) {
+ long checkTime = System.currentTimeMillis()
+ - getHeartBeatInterval();
+ boolean doElection = false;
+ for (Member member : this.members.values()) {
+ if (member.getTimeStamp() < checkTime) {
+ LOG.info("Member timestamp expired " + member);
+ this.members.remove(member.getId());
+ fireMemberStopped(member);
+ doElection = true;
+ }
+ }
+ if (doElection) {
+ election(null, false);
+ }
+ }
+ }
+
+ void expirationSweep() {
+ waitForElection();
+ if (isCoordinator() && this.started.get()
+ && this.electionFinished.get()) {
+ List<EntryKey> expiredMessages = null;
+ List<EntryKey> expiredLocks = null;
+ synchronized (this.mapMutex) {
+ Map<K, EntryValue<V>> map = this.localMap;
+ if (map != null) {
+ long currentTime = System.currentTimeMillis();
+ for (EntryValue value : map.values()) {
+ EntryKey k = value.getKey();
+ if (k.isExpired(currentTime)) {
+ if (expiredMessages == null) {
+ expiredMessages = new ArrayList<EntryKey>();
+ expiredMessages.add(k);
+ }
+ } else if (k.isLockExpired(currentTime)) {
+ k.setLocked(false);
+ if (expiredLocks == null) {
+ expiredLocks = new ArrayList<EntryKey>();
+ expiredLocks.add(k);
+ }
+ expiredLocks.add(k);
+ }
+ }
+ }
+ }
+ // do the actual removal of entries in a separate thread
+ if (expiredMessages != null) {
+ final List<EntryKey> expire = expiredMessages;
+ this.stateExecutor.execute(new Runnable() {
+ public void run() {
+ doMessageExpiration(expire);
+ }
+ });
+ }
+ if (expiredLocks != null) {
+ final List<EntryKey> expire = expiredLocks;
+ this.stateExecutor.execute(new Runnable() {
+ public void run() {
+ doLockExpiration(expire);
+ }
+ });
+ }
+ }
+ }
+
+ void doMessageExpiration(List<EntryKey> list) {
+ if (this.started.get() && this.electionFinished.get()
+ && isCoordinator()) {
+ for (EntryKey k : list) {
+ EntryValue<V> old = null;
+ synchronized (this.mapMutex) {
+ old = this.localMap.remove(k.getKey());
+ }
+ if (old != null) {
+ EntryMessage entryMsg = new EntryMessage();
+ entryMsg.setType(EntryMessage.MessageType.DELETE);
+ entryMsg.setExpired(true);
+ entryMsg.setKey(k);
+ entryMsg.setValue(old.getValue());
+ broadcastMapUpdate(entryMsg, "");
+ fireMapChanged(k.getOwner(), k.getKey(), old.getValue(),
+ null, true);
+ }
+ }
+ }
+ }
+
+ void doLockExpiration(List<EntryKey> list) {
+ if (this.started.get() && this.electionFinished.get()
+ && isCoordinator()) {
+ for (EntryKey k : list) {
+ EntryMessage entryMsg = new EntryMessage();
+ entryMsg.setType(EntryMessage.MessageType.DELETE);
+ entryMsg.setLockExpired(true);
+ entryMsg.setKey(k);
+ broadcastMapUpdate(entryMsg, "");
+ }
+ }
+ }
+
+ void sendHeartBeat() {
+ sendHeartBeat(this.heartBeatTopic);
+ }
+
+ void sendHeartBeat(Destination destination) {
+ if (this.started.get()) {
+ try {
+ ObjectMessage msg = this.stateSession
+ .createObjectMessage(this.local);
+ msg.setJMSType(STATE_TYPE);
+ this.stateProducer.send(destination, msg);
+ } catch (javax.jms.IllegalStateException e) {
+ // ignore - as we are probably stopping
+ } catch (Throwable e) {
+ if (this.started.get()) {
+ LOG.warn("Failed to send heart beat", e);
+ }
+ }
+ }
+ }
+
+ void updateNewMemberMap(Member member) {
+ List<Map.Entry<K, EntryValue<V>>> list = new ArrayList<Map.Entry<K, EntryValue<V>>>();
+ synchronized (this.mapMutex) {
+ if (this.localMap != null) {
+ for (Map.Entry<K, EntryValue<V>> entry : this.localMap
+ .entrySet()) {
+ list.add(entry);
+ }
+ }
+ }
+ try {
+ for (Map.Entry<K, EntryValue<V>> entry : list) {
+ EntryMessage entryMsg = new EntryMessage();
+ entryMsg.setKey(entry.getValue().getKey());
+ entryMsg.setValue(entry.getValue().getValue());
+ entryMsg.setType(EntryMessage.MessageType.SYNC);
+ entryMsg.setMapUpdate(true);
+ ObjectMessage objMsg = this.stateSession
+ .createObjectMessage(entryMsg);
+ if (!member.equals(entry.getValue().getKey().getOwner())) {
+ objMsg.setJMSType(STATE_TYPE);
+ this.stateProducer.send(member.getInBoxDestination(),
+ objMsg);
+ }
+ }
+ } catch (javax.jms.IllegalStateException e) {
+ // ignore - as closing
+ } catch (JMSException e) {
+ if (started.get()) {
+ LOG.warn("Failed to update new member ", e);
+ }
+ }
+ }
+
+ void fireMemberStarted(Member member) {
+ LOG.info(this.local.getName() + " Member started " + member);
+ for (MemberChangedListener l : this.membershipListeners) {
+ l.memberStarted(member);
+ }
+ }
+
+ void fireMemberStopped(Member member) {
+ LOG.info(this.local.getName() + " Member stopped " + member);
+ for (MemberChangedListener l : this.membershipListeners) {
+ l.memberStopped(member);
+ }
+ // remove all entries owned by the stopped member
+ List<EntryKey<K>> tmpList = new ArrayList<EntryKey<K>>();
+ boolean mapExists = false;
+ synchronized (this.mapMutex) {
+ mapExists = this.localMap != null;
+ if (mapExists) {
+ for (EntryValue value : this.localMap.values()) {
+ EntryKey entryKey = value.getKey();
+ if (entryKey.getOwner().equals(member)) {
+ if (entryKey.isRemoveOnExit()) {
+ tmpList.add(entryKey);
+ }
+ if (entryKey.isReleaseLockOnExit()) {
+ entryKey.setLocked(false);
+ }
+ }
+ }
+ }
+ }
+ if (mapExists) {
+ for (EntryKey<K> entryKey : tmpList) {
+ EntryValue<V> value = null;
+ synchronized (this.mapMutex) {
+ value = this.localMap.remove(entryKey);
+ }
+ fireMapChanged(member, entryKey.getKey(), value.getValue(),
+ null, false);
+ }
+ }
+ }
+
+ void fireMemberMessage(final Member member, final String replyId,
+ final Object message) {
+ if (this.started.get() && this.stateExecutor != null
+ && !this.messageExecutor.isShutdown()) {
+ this.messageExecutor.execute(new Runnable() {
+ public void run() {
+ doFireMemberMessage(member, replyId, message);
+ }
+ });
+ }
+ }
+
+ void doFireMemberMessage(Member sender, String replyId, Object message) {
+ if (this.started.get()) {
+ for (GroupMessageListener l : this.groupMessageListeners) {
+ l.messageDelivered(sender, replyId, message);
+ }
+ }
+ }
+
+ void fireMapChanged(final Member owner, final Object key,
+ final Object oldValue, final Object newValue, final boolean expired) {
+ if (this.started.get() && this.stateExecutor != null
+ && !this.stateExecutor.isShutdown()) {
+ this.stateExecutor.execute(new Runnable() {
+ public void run() {
+ doFireMapChanged(owner, key, oldValue, newValue, expired);
+ }
+ });
+ }
+ }
+
+ void doFireMapChanged(Member owner, Object key, Object oldValue,
+ Object newValue, boolean expired) {
+ if (this.started.get()) {
+ for (GroupStateChangedListener l : this.mapChangedListeners) {
+ if (oldValue == null) {
+ l.mapInsert(owner, key, newValue);
+ } else if (newValue == null) {
+ l.mapRemove(owner, key, oldValue, expired);
+ } else {
+ l.mapUpdate(owner, key, oldValue, newValue);
+ }
+ }
+ }
+ }
+
+ void checkStatus() throws IllegalStateException {
+ if (!started.get()) {
+ throw new IllegalStateException("GroupMap " + this.local.getName()
+ + " not started");
+ }
+ waitForElection();
+ }
+
+ public String toString() {
+ return "Group:" + getName() + "{id=" + this.local.getId()
+ + ",coordinator=" + isCoordinator() + ",inbox="
+ + this.local.getInBoxDestination() + "}";
+ }
+
+ void election(final Member member, final boolean memberStarted) {
+ if (this.started.get() && this.stateExecutor != null
+ && !this.electionExecutor.isShutdown()) {
+ synchronized (this.electionFinished) {
+ this.electionFinished.set(false);
+ }
+ synchronized (this.electionExecutor) {
+ // remove any queued election tasks
+ List<Runnable> list = new ArrayList<Runnable>(
+ this.electionExecutor.getQueue());
+ for (Runnable r : list) {
+ ElectionService es = (ElectionService) r;
+ es.stop();
+ this.electionExecutor.remove(es);
+ }
+ }
+ ElectionService es = new ElectionService(member, memberStarted);
+ es.start();
+ this.electionExecutor.execute(es);
+ }
+ }
+
+ boolean callElection() {
+ List<Member> members = new ArrayList<Member>(this.members.values());
+ List<Member> sorted = sortMemberList(members);
+ AsyncMapRequest request = new AsyncMapRequest();
+ boolean doCall = false;
+ for (Member member : sorted) {
+ if (this.local.equals(member)) {
+ doCall = true;
+ } else if (doCall) {
+ ElectionMessage msg = new ElectionMessage();
+ msg.setMember(this.local);
+ msg.setType(ElectionMessage.MessageType.ELECTION);
+ sendAsyncStateRequest(request, member, msg);
+ }
+ }
+ boolean result = request.isSuccess(getHeartBeatInterval());
+ return result;
+ }
+
+ void processElectionMessage(ElectionMessage msg, Destination replyTo,
+ String correlationId) {
+ if (msg.isElection()) {
+ msg.setType(ElectionMessage.MessageType.ANSWER);
+ msg.setMember(this.local);
+ sendReply(msg, replyTo, correlationId);
+ election(null, false);
+ } else if (msg.isCoordinator()) {
+ synchronized (this.electionFinished) {
+ this.coordinator = msg.getMember();
+ this.electionFinished.set(true);
+ this.electionFinished.notifyAll();
+ }
+ }
+ }
+
+ void broadcastElectionType(ElectionMessage.MessageType type) {
+ if (started.get()) {
+ try {
+ ElectionMessage msg = new ElectionMessage();
+ msg.setMember(this.local);
+ msg.setType(type);
+ ObjectMessage objMsg = this.stateSession
+ .createObjectMessage(msg);
+ objMsg.setJMSType(STATE_TYPE);
+ this.stateProducer.send(this.stateTopic, objMsg);
+ } catch (javax.jms.IllegalStateException e) {
+ // ignore - we are stopping
+ } catch (JMSException e) {
+ if (this.started.get()) {
+ LOG.error("Failed to broadcast election message: " + type,
+ e);
+ }
+ }
+ }
+ }
+
+ void waitForElection() {
+ synchronized (this.electionFinished) {
+ while (started.get() && !this.electionFinished.get()) {
+ try {
+ this.electionFinished.wait(200);
+ } catch (InterruptedException e) {
+ LOG.warn("Interrupted in waitForElection");
+ stop();
+ }
+ }
+ }
+ }
+ class ElectionService implements Runnable {
+ private AtomicBoolean started = new AtomicBoolean();
+ private Member member;
+ private boolean memberStarted;
+
+ ElectionService(Member member, boolean memberStarted) {
+ this.member = member;
+ this.memberStarted = memberStarted;
+ }
+
+ void start() {
+ this.started.set(true);
+ }
+
+ void stop() {
+ this.started.set(false);
+ }
+
+ public void run() {
+ doElection();
+ }
+
+ void doElection() {
+ if ((this.member == null || (!this.member.equals(Group.this.local) || Group.this.members
+ .size() == getMinimumGroupSize()))) {
+ boolean wasCoordinator = isCoordinatorMatch() && !isEmpty();
+ // call an election
+ while (!callElection() && isStarted() && this.started.get())
+ ;
+ if (isStarted() && this.started.get()) {
+ List<Member> members = new ArrayList<Member>(
+ Group.this.members.values());
+ Group.this.coordinator = selectCordinator(members);
+ if (isCoordinatorMatch()) {
+ broadcastElectionType(ElectionMessage.MessageType.COORDINATOR);
+ }
+ if (this.memberStarted && this.member != null) {
+ if (wasCoordinator || isCoordinator()
+ && this.started.get()) {
+ updateNewMemberMap(this.member);
+ }
+ }
+ if (!isElectionFinished() && this.started.get()) {
+ try {
+ synchronized (Group.this.electionFinished) {
+ Group.this.electionFinished
+ .wait(Group.this.heartBeatInterval * 2);
+ }
+ } catch (InterruptedException e) {
+ }
+ }
+ if (!isElectionFinished() && this.started.get()) {
+ // we must be the coordinator
+ setCoordinator(getLocalMember());
+ setElectionFinished(true);
+ broadcastElectionType(ElectionMessage.MessageType.COORDINATOR);
+ }
+ }
+ }
+ }
+ }
+}
Propchange: activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/Group.java
------------------------------------------------------------------------------
svn:eol-style = native
Added: activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/GroupMessageListener.java
URL: http://svn.apache.org/viewvc/activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/GroupMessageListener.java?rev=702452&view=auto
==============================================================================
--- activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/GroupMessageListener.java (added)
+++ activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/GroupMessageListener.java Tue Oct 7 05:31:59 2008
@@ -0,0 +1,34 @@
+/**
+ * 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.activegroups;
+
+
+/**
+ * A listener for message communication
+ *
+ */
+public interface GroupMessageListener {
+
+ /**
+ * Called when a message is delivered to the <CODE>Group</CODE> from another member
+ * @param sender the member who sent the message
+ * @param replyId the id to use to respond to a message
+ * @param message the message object
+ */
+ void messageDelivered(Member sender, String replyId, Object message);
+}
\ No newline at end of file
Propchange: activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/GroupMessageListener.java
------------------------------------------------------------------------------
svn:eol-style = native
Added: activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/GroupStateChangedListener.java
URL: http://svn.apache.org/viewvc/activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/GroupStateChangedListener.java?rev=702452&view=auto
==============================================================================
--- activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/GroupStateChangedListener.java (added)
+++ activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/GroupStateChangedListener.java Tue Oct 7 05:31:59 2008
@@ -0,0 +1,50 @@
+/**
+ * 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.activegroups;
+
+/**
+ *Get notifications about changes to the state of the map
+ *
+ */
+public interface GroupStateChangedListener {
+
+ /**
+ * Called when a key/value pair is inserted into the map
+ * @param owner
+ * @param key
+ * @param value
+ */
+ void mapInsert(Member owner,Object key, Object value);
+
+ /**
+ * Called when a key value is updated in the map
+ * @param owner
+ * @param Key
+ * @param oldValue
+ * @param newValue
+ */
+ void mapUpdate(Member owner,Object Key,Object oldValue,Object newValue);
+
+ /**
+ * Called when a key value is removed from the map
+ * @param owner
+ * @param key
+ * @param value
+ * @param expired
+ */
+ void mapRemove(Member owner,Object key, Object value,boolean expired);
+}
Propchange: activemq/trunk/activemq-groups/src/main/java/org/apache/activegroups/GroupStateChangedListener.java
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