/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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* Portions Copyright 2011 ForgeRock AS
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*/
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package org.opends.server.replication.plugin;
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import org.opends.server.replication.protocol.LDAPUpdateMsg;
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import java.util.concurrent.BlockingQueue;
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import java.util.concurrent.TimeUnit;
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import org.opends.messages.Message;
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import static org.opends.server.loggers.ErrorLogger.logError;
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import static org.opends.server.loggers.debug.DebugLogger.debugEnabled;
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import static org.opends.server.loggers.debug.DebugLogger.getTracer;
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import static org.opends.messages.ReplicationMessages.*;
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import static org.opends.server.util.StaticUtils.stackTraceToSingleLineString;
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import org.opends.server.api.DirectoryThread;
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import org.opends.server.loggers.debug.DebugTracer;
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/**
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* Thread that is used to get message from the replication servers (stored
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* in the updates queue) and replay them in the current server. A configurable
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* number of this thread is created for the whole MultimasterReplication object
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* (i.e: these threads are shared across the ReplicationDomain objects for
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* replaying the updates they receive)
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*/
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public class ReplayThread extends DirectoryThread
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{
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/**
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* The tracer object for the debug logger.
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*/
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private static final DebugTracer TRACER = getTracer();
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private final BlockingQueue<UpdateToReplay> updateToReplayQueue;
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private volatile boolean shutdown = false;
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private volatile boolean done = false;
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private static int count = 0;
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/**
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* Constructor for the ReplayThread.
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*
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* @param updateToReplayQueue The queue of update messages we have to replay
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*/
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public ReplayThread(BlockingQueue<UpdateToReplay> updateToReplayQueue)
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{
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super("Replica replay thread " + count++);
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this.updateToReplayQueue = updateToReplayQueue;
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}
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/**
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* Shutdown this replay thread.
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*/
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public void shutdown()
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{
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shutdown = true;
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}
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/**
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* Run method for this class.
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*/
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@Override
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public void run()
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{
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if (debugEnabled())
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{
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TRACER.debugInfo("Replication Replay thread starting.");
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}
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UpdateToReplay updateToreplay = null;
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while (!shutdown)
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{
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try
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{
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// Loop getting an updateToReplayQueue from the update message queue and
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// replaying matching changes
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while ( (!shutdown) &&
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((updateToreplay = updateToReplayQueue.poll(1L,
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TimeUnit.SECONDS)) != null))
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{
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// Find replication domain for that update message
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LDAPUpdateMsg updateMsg = updateToreplay.getUpdateMessage();
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LDAPReplicationDomain domain = updateToreplay.getReplicationDomain();
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domain.replay(updateMsg);
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}
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} catch (Exception e)
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{
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/*
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* catch all exceptions happening so that the thread never dies even
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* in case of problems.
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*/
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Message message = ERR_EXCEPTION_REPLAYING_REPLICATION_MESSAGE.get(
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stackTraceToSingleLineString(e));
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logError(message);
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}
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}
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done = true;
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if (debugEnabled())
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{
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TRACER.debugInfo("Replication Replay thread stopping.");
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}
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}
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/**
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* Wait for the completion of this thread.
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*/
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public void waitForShutdown()
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{
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try
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{
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while ((done == false) && (this.isAlive()))
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{
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Thread.sleep(50);
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}
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} catch (InterruptedException e)
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{
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// exit the loop if this thread is interrupted.
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}
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}
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}
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