org.apache.activemq.artemis.core.server.impl.NamedLiveNodeIdLocatorForReplication Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.activemq.artemis.core.server.impl;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.Queue;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import org.apache.activemq.artemis.api.core.ActiveMQException;
import org.apache.activemq.artemis.api.core.Pair;
import org.apache.activemq.artemis.api.core.TransportConfiguration;
import org.apache.activemq.artemis.api.core.client.TopologyMember;
import org.apache.activemq.artemis.core.server.LiveNodeLocator;
import org.apache.activemq.artemis.utils.ConcurrentUtil;
/**
* It looks for a live server in the cluster with a specific NodeID
*/
public class NamedLiveNodeIdLocatorForReplication extends LiveNodeLocator {
private final Lock lock = new ReentrantLock();
private final Condition condition = lock.newCondition();
private final String nodeID;
private final long retryReplicationWait;
private final Queue> liveConfigurations = new LinkedList<>();
private final ArrayList> triedConfigurations = new ArrayList<>();
private boolean found;
public NamedLiveNodeIdLocatorForReplication(String nodeID,
BackupRegistrationListener backupRegistrationListener,
long retryReplicationWait) {
super(backupRegistrationListener);
this.nodeID = nodeID;
this.retryReplicationWait = retryReplicationWait;
}
@Override
public void locateNode() throws ActiveMQException {
locateNode(-1L);
}
@Override
public void locateNode(long timeout) throws ActiveMQException {
try {
lock.lock();
if (liveConfigurations.size() == 0) {
try {
if (timeout != -1L) {
ConcurrentUtil.await(condition, timeout);
} else {
while (liveConfigurations.size() == 0) {
condition.await(retryReplicationWait, TimeUnit.MILLISECONDS);
liveConfigurations.addAll(triedConfigurations);
triedConfigurations.clear();
}
}
} catch (InterruptedException e) {
//ignore
}
}
} finally {
lock.unlock();
}
}
@Override
public void nodeUP(TopologyMember topologyMember, boolean last) {
try {
lock.lock();
if (nodeID.equals(topologyMember.getNodeId()) && topologyMember.getLive() != null) {
Pair liveConfiguration = new Pair<>(topologyMember.getLive(), topologyMember.getBackup());
if (!liveConfigurations.contains(liveConfiguration)) {
liveConfigurations.add(liveConfiguration);
}
found = true;
condition.signal();
}
} finally {
lock.unlock();
}
}
@Override
public void nodeDown(long eventUID, String nodeID) {
//no op
}
@Override
public String getNodeID() {
return found ? nodeID : null;
}
@Override
public Pair getLiveConfiguration() {
return liveConfigurations.peek();
}
@Override
public void notifyRegistrationFailed(boolean alreadyReplicating) {
try {
lock.lock();
triedConfigurations.add(liveConfigurations.poll());
super.notifyRegistrationFailed(alreadyReplicating);
} finally {
lock.unlock();
}
}
}