org.apache.activemq.artemis.core.server.balancing.pools.ClusterPool Maven / Gradle / Ivy
/**
* 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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.activemq.artemis.core.server.balancing.pools;
import org.apache.activemq.artemis.api.core.client.ClusterTopologyListener;
import org.apache.activemq.artemis.api.core.client.TopologyMember;
import org.apache.activemq.artemis.core.server.balancing.targets.TargetFactory;
import org.apache.activemq.artemis.core.server.cluster.ClusterConnection;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ScheduledExecutorService;
public class ClusterPool extends AbstractPool implements ClusterTopologyListener {
private final ClusterConnection clusterConnection;
private final Map clusterMembers = new ConcurrentHashMap<>();
public ClusterPool(TargetFactory targetFactory, ScheduledExecutorService scheduledExecutor,
int checkPeriod, ClusterConnection clusterConnection) {
super(targetFactory, scheduledExecutor, checkPeriod);
this.clusterConnection = clusterConnection;
}
@Override
public void start() throws Exception {
super.start();
clusterConnection.addClusterTopologyListener(this);
}
@Override
public void stop() throws Exception {
clusterConnection.removeClusterTopologyListener(this);
super.stop();
}
@Override
public void nodeUP(TopologyMember member, boolean last) {
if (!clusterConnection.getNodeID().equals(member.getNodeId()) &&
clusterMembers.putIfAbsent(member.getNodeId(), member) == null) {
addTarget(member.getLive(), member.getNodeId());
}
}
@Override
public void nodeDown(long eventUID, String nodeID) {
if (clusterMembers.remove(nodeID) != null) {
removeTarget(getTarget(nodeID));
}
}
}