/*
|
* The contents of this file are subject to the terms of the Common Development and
|
* Distribution License (the License). You may not use this file except in compliance with the
|
* License.
|
*
|
* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
|
* specific language governing permission and limitations under the License.
|
*
|
* When distributing Covered Software, include this CDDL Header Notice in each file and include
|
* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
|
* Header, with the fields enclosed by brackets [] replaced by your own identifying
|
* information: "Portions Copyright [year] [name of copyright owner]".
|
*
|
* Copyright 2006-2008 Sun Microsystems, Inc.
|
* Portions Copyright 2011-2016 ForgeRock AS.
|
*/
|
package org.opends.server.replication.plugin;
|
|
import static org.opends.messages.ReplicationMessages.*;
|
import static org.opends.server.util.StaticUtils.*;
|
|
import java.util.concurrent.BlockingQueue;
|
import java.util.concurrent.TimeUnit;
|
import java.util.concurrent.atomic.AtomicBoolean;
|
import java.util.concurrent.locks.ReentrantLock;
|
|
import org.opends.server.api.DirectoryThread;
|
import org.forgerock.i18n.slf4j.LocalizedLogger;
|
import org.opends.server.replication.protocol.LDAPUpdateMsg;
|
|
/**
|
* Thread that is used to get message from the replication servers (stored
|
* in the updates queue) and replay them in the current server. A configurable
|
* number of this thread is created for the whole MultimasterReplication object
|
* (i.e: these threads are shared across the ReplicationDomain objects for
|
* replaying the updates they receive)
|
*/
|
public class ReplayThread extends DirectoryThread
|
{
|
private static final LocalizedLogger logger = LocalizedLogger.getLoggerForThisClass();
|
|
private final BlockingQueue<UpdateToReplay> updateToReplayQueue;
|
private final ReentrantLock switchQueueLock;
|
private AtomicBoolean shutdown = new AtomicBoolean(false);
|
private static int count;
|
|
/**
|
* Constructor for the ReplayThread.
|
*
|
* @param updateToReplayQueue The queue of update messages we have to replay
|
* @param switchQueueLock lock to ensure moving updates from one queue to another is atomic
|
*/
|
public ReplayThread(BlockingQueue<UpdateToReplay> updateToReplayQueue, ReentrantLock switchQueueLock)
|
{
|
super("Replica replay thread " + count++);
|
this.updateToReplayQueue = updateToReplayQueue;
|
this.switchQueueLock = switchQueueLock;
|
}
|
|
/**
|
* Shutdown this replay thread.
|
*/
|
public void shutdown()
|
{
|
shutdown.set(true);
|
}
|
|
/**
|
* Run method for this class.
|
*/
|
@Override
|
public void run()
|
{
|
if (logger.isTraceEnabled())
|
{
|
logger.trace("Replication Replay thread starting.");
|
}
|
|
while (!shutdown.get())
|
{
|
try
|
{
|
if (switchQueueLock.tryLock(1L, TimeUnit.SECONDS))
|
{
|
LDAPReplicationDomain domain;
|
LDAPUpdateMsg updateMsg;
|
try
|
{
|
if (shutdown.get())
|
{
|
break;
|
}
|
UpdateToReplay updateToreplay = updateToReplayQueue.poll(1L, TimeUnit.SECONDS);
|
if (updateToreplay == null)
|
{
|
continue;
|
}
|
// Find replication domain for that update message and mark it as "in progress"
|
updateMsg = updateToreplay.getUpdateMessage();
|
domain = updateToreplay.getReplicationDomain();
|
domain.markInProgress(updateMsg);
|
}
|
finally
|
{
|
switchQueueLock.unlock();
|
}
|
domain.replay(updateMsg, shutdown);
|
}
|
}
|
catch (Exception e)
|
{
|
/*
|
* catch all exceptions happening so that the thread never dies even
|
* in case of problems.
|
*/
|
logger.error(ERR_EXCEPTION_REPLAYING_REPLICATION_MESSAGE, stackTraceToSingleLineString(e));
|
}
|
}
|
if (logger.isTraceEnabled())
|
{
|
logger.trace("Replication Replay thread stopping.");
|
}
|
}
|
}
|
