/*
* 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 2014 ForgeRock AS
*/
package org.opends.server.replication.service;
import java.util.concurrent.ConcurrentSkipListSet;
import java.util.concurrent.atomic.AtomicLong;
import org.opends.server.types.DN;
/**
* Class useful for the case where DS/RS instances are collocated inside the
* same JVM. It synchronizes the shutdown of the DS and RS sides.
* <p>
* More specifically, it ensures a ReplicaOfflineMsg sent by the DS is
* relayed/forwarded by the collocated RS to the other RSs in the topology
* before the whole process shuts down.
*
* @since OPENDJ-1453
*/
public class DSRSShutdownSync
{
private static final ConcurrentSkipListSet<DN> replicaOfflineMsgs =
new ConcurrentSkipListSet<DN>();
private static AtomicLong stopInstanceTimestamp = new AtomicLong();
/**
* Message has been sent.
*
* @param baseDN
* the domain for which the message has been sent
*/
public void replicaOfflineMsgSent(DN baseDN)
{
stopInstanceTimestamp.compareAndSet(0, System.currentTimeMillis());
replicaOfflineMsgs.add(baseDN);
}
/**
* Message has been forwarded.
*
* @param baseDN
* the domain for which the message has been sent
*/
public void replicaOfflineMsgForwarded(DN baseDN)
{
replicaOfflineMsgs.remove(baseDN);
}
/**
* Whether a ReplicationServer ServerReader or ServerWriter can proceed with
* shutdown.
*
* @param baseDN
* the baseDN of the ServerReader or ServerWriter .
* @return true if the caller can shutdown, false otherwise
*/
public boolean canShutdown(DN baseDN)
{
return !replicaOfflineMsgs.contains(baseDN)
|| System.currentTimeMillis() - stopInstanceTimestamp.get() > 5000;
}
}