/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
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* or http://forgerock.org/license/CDDLv1.0.html.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at legal-notices/CDDLv1_0.txt.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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* Copyright 2014 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.opends.server.types.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 =
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new ConcurrentSkipListSet<DN>();
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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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