/*
|
* 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 legal-notices/CDDLv1_0.txt
|
* or http://forgerock.org/license/CDDLv1.0.html.
|
* 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 legal-notices/CDDLv1_0.txt.
|
* 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 2008-2009 Sun Microsystems, Inc.
|
* Portions Copyright 2011-2014 ForgeRock AS
|
*/
|
package org.opends.server.replication.server;
|
|
|
|
import org.forgerock.i18n.slf4j.LocalizedLogger;
|
import org.opends.server.api.DirectoryThread;
|
|
|
|
/**
|
* This thread is in charge of periodically determining if the connected
|
* directory servers of the domain it is associated with are late or not
|
* regarding the changes they have to replay. A threshold is set for the maximum
|
* allowed number of pending changes. When the threshold for a DS is crossed,
|
* the status analyzer must make the DS status change to DEGRADED_STATUS. When
|
* the threshold is uncrossed, the status analyzer must make the DS status
|
* change back to NORMAL_STATUS. To have meaning of status, please refer to
|
* ServerStatus class.
|
*/
|
public class StatusAnalyzer extends DirectoryThread
|
{
|
private static final LocalizedLogger logger = LocalizedLogger
|
.getLoggerForThisClass();
|
|
/** Sleep time for the thread, in ms. */
|
private static final int STATUS_ANALYZER_SLEEP_TIME = 5000;
|
|
private final ReplicationServerDomain replicationServerDomain;
|
private final Object shutdownLock = new Object();
|
private volatile boolean shutdown = false;
|
private volatile boolean done = false;
|
|
|
|
/**
|
* Create a StatusAnalyzer.
|
*
|
* @param replicationServerDomain
|
* The ReplicationServerDomain the status analyzer is for.
|
*/
|
public StatusAnalyzer(ReplicationServerDomain replicationServerDomain)
|
{
|
super("Replication server RS("
|
+ replicationServerDomain.getLocalRSServerId()
|
+ ") delay monitor for domain \"" + replicationServerDomain.getBaseDN()
|
+ "\"");
|
|
this.replicationServerDomain = replicationServerDomain;
|
}
|
|
|
|
/**
|
* Analyzes if servers are late or not, and change their status accordingly.
|
*/
|
@Override
|
public void run()
|
{
|
if (logger.isTraceEnabled())
|
{
|
logger.trace(getMessage("Directory server status analyzer starting."));
|
}
|
|
while (!shutdown)
|
{
|
synchronized (shutdownLock)
|
{
|
if (!shutdown)
|
{
|
try
|
{
|
shutdownLock.wait(STATUS_ANALYZER_SLEEP_TIME);
|
}
|
catch (InterruptedException e)
|
{
|
// Server shutdown monitor may interrupt slow threads.
|
logger.traceException(e);
|
shutdown = true;
|
break;
|
}
|
}
|
}
|
|
if (shutdown)
|
{
|
break;
|
}
|
|
replicationServerDomain.checkDSDegradedStatus();
|
}
|
|
done = true;
|
logger.trace(getMessage("Status analyzer is terminated."));
|
}
|
|
|
|
private String getMessage(String message)
|
{
|
return "In RS " + replicationServerDomain.getLocalRSServerId()
|
+ ", for baseDN=" + replicationServerDomain.getBaseDN() + ": "
|
+ message;
|
}
|
|
|
|
/**
|
* Stops the thread.
|
*/
|
public void shutdown()
|
{
|
synchronized (shutdownLock)
|
{
|
shutdown = true;
|
shutdownLock.notifyAll();
|
|
if (logger.isTraceEnabled())
|
{
|
logger.trace(getMessage("Shutting down status analyzer."));
|
}
|
}
|
}
|
|
|
|
/**
|
* Waits for analyzer death. If not finished within 2 seconds, forces
|
* interruption
|
*/
|
public void waitForShutdown()
|
{
|
try
|
{
|
int FACTOR = 40; // Wait for 2 seconds before interrupting the thread
|
int n = 0;
|
while (!done && this.isAlive())
|
{
|
Thread.sleep(50);
|
n++;
|
if (n >= FACTOR)
|
{
|
logger.trace(getMessage("Interrupting status analyzer."));
|
interrupt();
|
}
|
}
|
}
|
catch (InterruptedException e)
|
{
|
// exit the loop if this thread is interrupted.
|
}
|
}
|
}
|
