org.apache.activemq.artemis.core.server.federation.FederationManager 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.federation;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import org.apache.activemq.artemis.api.core.ActiveMQException;
import org.apache.activemq.artemis.core.server.ActiveMQComponent;
import org.apache.activemq.artemis.core.server.ActiveMQServer;
import org.apache.activemq.artemis.core.config.FederationConfiguration;
public class FederationManager implements ActiveMQComponent {
private final ActiveMQServer server;
private Map federations = new HashMap<>();
private State state;
enum State {
STOPPED,
STOPPING,
/**
* Deployed means {@link FederationManager#deploy()} was called but
* {@link FederationManager#start()} was not called.
*
* We need the distinction if {@link FederationManager#stop()} is called before 'start'. As
* otherwise we would leak locators.
*/
DEPLOYED, STARTED,
}
public FederationManager(final ActiveMQServer server) {
this.server = server;
}
@Override
public synchronized void start() throws ActiveMQException {
if (state == State.STARTED) return;
deploy();
for (Federation federation : federations.values()) {
federation.start();
}
state = State.STARTED;
}
@Override
public synchronized void stop() {
if (state == State.STOPPED) return;
state = State.STOPPING;
for (Federation federation : federations.values()) {
federation.stop();
}
federations.clear();
state = State.STOPPED;
}
@Override
public boolean isStarted() {
return state == State.STARTED;
}
public synchronized void deploy() throws ActiveMQException {
for (FederationConfiguration federationConfiguration : server.getConfiguration().getFederationConfigurations()) {
deploy(federationConfiguration);
}
if (state != State.STARTED) {
state = State.DEPLOYED;
}
}
public synchronized boolean undeploy(String name) {
Federation federation = federations.remove(name);
if (federation != null) {
federation.stop();
}
return true;
}
public synchronized boolean deploy(FederationConfiguration federationConfiguration) throws ActiveMQException {
Federation federation = federations.get(federationConfiguration.getName());
if (federation == null) {
federation = newFederation(federationConfiguration);
} else if (!Objects.equals(federation.getConfig().getCredentials(), federationConfiguration.getCredentials())) {
undeploy(federationConfiguration.getName());
federation = newFederation(federationConfiguration);
}
federation.deploy();
return true;
}
private synchronized Federation newFederation(FederationConfiguration federationConfiguration) throws ActiveMQException {
Federation federation = new Federation(server, federationConfiguration);
federations.put(federationConfiguration.getName(), federation);
if (state == State.STARTED) {
federation.start();
}
return federation;
}
public Federation get(String name) {
return federations.get(name);
}
public void register(FederatedAbstract federatedAbstract) {
server.registerBrokerPlugin(federatedAbstract);
}
public void unregister(FederatedAbstract federatedAbstract) {
server.unRegisterBrokerPlugin(federatedAbstract);
}
}