ListenerThread.java revision c4cdb34ae21ebbbc11586715cfa777fd2a75b8e0
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE
* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
* add the following below this CDDL HEADER, with the fields enclosed
* by brackets "[]" replaced with your own identifying information:
* Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
*
* Copyright 2006-2008 Sun Microsystems, Inc.
*/
package org.opends.server.replication.service;
import org.opends.messages.Message;
import static org.opends.server.loggers.ErrorLogger.logError;
import static org.opends.server.loggers.debug.DebugLogger.debugEnabled;
import static org.opends.server.loggers.debug.DebugLogger.getTracer;
import static org.opends.messages.ReplicationMessages.*;
import static org.opends.server.util.StaticUtils.stackTraceToSingleLineString;
import org.opends.server.api.DirectoryThread;
import org.opends.server.loggers.debug.DebugTracer;
import org.opends.server.replication.protocol.UpdateMsg;
/**
* Thread that is used to get messages from the Replication servers
* and replay them in the current server.
*/
public class ListenerThread extends DirectoryThread
{
/**
* The tracer object for the debug logger.
*/
private static final DebugTracer TRACER = getTracer();
private ReplicationDomain repDomain;
private boolean shutdown = false;
private boolean done = false;
/**
* Constructor for the ListenerThread.
*
* @param repDomain the replication domain that created this thread
*/
public ListenerThread(ReplicationDomain repDomain)
{
super("Replication Listener for server id " + repDomain.getServerId() +
" and domain " + repDomain.getServiceID());
this.repDomain = repDomain;
}
/**
* Shutdown this listener thread.
*/
public void shutdown()
{
shutdown = true;
}
/**
* Run method for this class.
*/
@Override
public void run()
{
UpdateMsg updateMsg = null;
if (debugEnabled())
{
TRACER.debugInfo("Replication Listener thread starting.");
}
while (!shutdown)
{
try
{
// Loop receiving update messages and puting them in the update message
// queue
while ((!shutdown) && ((updateMsg = repDomain.receive()) != null))
{
if (repDomain.processUpdate(updateMsg) == true)
repDomain.processUpdateDoneSynchronous(updateMsg);
}
if (updateMsg == null)
shutdown = true;
} catch (Exception e)
{
/*
* catch all exceptions happening in repDomain.receive so that the
* thread never dies even in case of problems.
*/
Message message = ERR_EXCEPTION_RECEIVING_REPLICATION_MESSAGE.get(
stackTraceToSingleLineString(e));
logError(message);
}
}
done = true;
if (debugEnabled())
{
TRACER.debugInfo("Replication Listener thread stopping.");
}
}
/**
* Wait for the completion of this thread.
*/
public void waitForShutdown()
{
try
{
int FACTOR = 40; // Wait for 2 seconds before interrupting the thread
int n = 0;
while ((done == false) && (this.isAlive()))
{
Thread.sleep(50);
n++;
if (n >= FACTOR)
{
TRACER.debugInfo("Interrupting listener thread for dn " +
repDomain.getServiceID() + " in DS " + repDomain.getServerId());
this.interrupt();
}
}
} catch (InterruptedException e)
{
// exit the loop if this thread is interrupted.
}
}
}