org.apache.activemq.artemis.core.server.balancing.pools.DiscoveryGroupService 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.core.cluster.DiscoveryEntry;
import org.apache.activemq.artemis.core.cluster.DiscoveryGroup;
import org.apache.activemq.artemis.core.cluster.DiscoveryListener;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
public class DiscoveryGroupService extends DiscoveryService implements DiscoveryListener {
private final DiscoveryGroup discoveryGroup;
private final Map entries = new ConcurrentHashMap<>();
public DiscoveryGroupService(DiscoveryGroup discoveryGroup) {
this.discoveryGroup = discoveryGroup;
}
@Override
public void start() throws Exception {
discoveryGroup.registerListener(this);
discoveryGroup.start();
}
@Override
public void stop() throws Exception {
discoveryGroup.unregisterListener(this);
discoveryGroup.stop();
entries.clear();
}
@Override
public boolean isStarted() {
return discoveryGroup.isStarted();
}
@Override
public void connectorsChanged(List newEntries) {
Map oldEntries = new HashMap<>(entries);
for (DiscoveryEntry newEntry : newEntries) {
Entry oldEntry = oldEntries.remove(newEntry.getNodeID());
if (oldEntry == null) {
Entry addingEntry = new Entry(newEntry.getNodeID(), newEntry.getConnector());
entries.put(addingEntry.getNodeID(), addingEntry);
fireEntryAddedEvent(addingEntry);
} else if (!newEntry.getConnector().equals(oldEntry.getConnector())) {
Entry updatingEntry = new Entry(newEntry.getNodeID(), newEntry.getConnector());
entries.put(updatingEntry.getNodeID(), updatingEntry);
fireEntryUpdatedEvent(oldEntry, updatingEntry);
}
}
oldEntries.forEach((nodeID, entry) -> {
entries.remove(nodeID);
fireEntryRemovedEvent(entry);
});
}
}