/*
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* The contents of this file are subject to the terms of the Common Development and
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* Distribution License (the License). You may not use this file except in compliance with the
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* License.
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*
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* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
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* specific language governing permission and limitations under the License.
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*
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* When distributing Covered Software, include this CDDL Header Notice in each file and include
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* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
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* Header, with the fields enclosed by brackets [] replaced by your own identifying
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* information: "Portions Copyright [year] [name of copyright owner]".
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*
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* Copyright 2014-2016 ForgeRock AS.
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*/
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package org.opends.server.replication.service;
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import java.util.concurrent.ConcurrentSkipListSet;
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import java.util.concurrent.atomic.AtomicLong;
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import org.forgerock.opendj.ldap.DN;
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/**
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* Class useful for the case where DS/RS instances are collocated inside the
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* same JVM. It synchronizes the shutdown of the DS and RS sides.
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* <p>
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* More specifically, it ensures a ReplicaOfflineMsg sent by the DS is
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* relayed/forwarded by the collocated RS to the other RSs in the topology
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* before the whole process shuts down.
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*
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* @since OPENDJ-1453
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*/
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public class DSRSShutdownSync
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{
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private static final ConcurrentSkipListSet<DN> replicaOfflineMsgs = new ConcurrentSkipListSet<>();
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private static AtomicLong stopInstanceTimestamp = new AtomicLong();
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/**
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* Message has been sent.
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*
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* @param baseDN
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* the domain for which the message has been sent
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*/
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public void replicaOfflineMsgSent(DN baseDN)
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{
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stopInstanceTimestamp.compareAndSet(0, System.currentTimeMillis());
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replicaOfflineMsgs.add(baseDN);
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}
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/**
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* Message has been forwarded.
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*
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* @param baseDN
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* the domain for which the message has been sent
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*/
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public void replicaOfflineMsgForwarded(DN baseDN)
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{
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replicaOfflineMsgs.remove(baseDN);
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}
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/**
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* Whether a ReplicationServer ServerReader or ServerWriter can proceed with
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* shutdown.
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*
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* @param baseDN
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* the baseDN of the ServerReader or ServerWriter .
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* @return true if the caller can shutdown, false otherwise
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*/
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public boolean canShutdown(DN baseDN)
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{
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return !replicaOfflineMsgs.contains(baseDN)
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|| System.currentTimeMillis() - stopInstanceTimestamp.get() > 5000;
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}
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}
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