/*
* JBoss, Home of Professional Open Source
* Copyright 2014, Red Hat, Inc. and/or its affiliates, and individual
* contributors by the @authors tag. See the copyright.txt in the
* distribution for a full listing of individual contributors.
*
* Licensed 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.jboss.as.quickstarts.cluster.hasingleton.service.ejb;
import org.jboss.as.clustering.singleton.SingletonService;
import org.jboss.as.clustering.singleton.election.NamePreference;
import org.jboss.as.clustering.singleton.election.PreferredSingletonElectionPolicy;
import org.jboss.as.clustering.singleton.election.SimpleSingletonElectionPolicy;
import org.jboss.logging.Logger;
import org.jboss.msc.service.DelegatingServiceContainer;
import org.jboss.msc.service.ServiceActivator;
import org.jboss.msc.service.ServiceActivatorContext;
import org.jboss.msc.service.ServiceController;
/**
* Service activator that installs the HATimerService as a clustered singleton service
* during deployment.
*
* @author Paul Ferraro
* @author Wolf-Dieter Fink
*/
public class HATimerServiceActivator implements ServiceActivator {
private final Logger log = Logger.getLogger(this.getClass());
@Override
public void activate(ServiceActivatorContext context) {
log.info("HATimerService will be installed!");
HATimerService service = new HATimerService();
SingletonService<String> singleton = new SingletonService<String>(service, HATimerService.SINGLETON_SERVICE_NAME);
/*
* The NamePreference is a combination of the node name (-Djboss.node.name) and the name of
* the configured cache "singleton". If there is more than 1 node, it is possible to add more than
* one name and the election will use the first available node in that list.
* - To pass a chain of election policies to the singleton and tell JGroups to run the
* singleton on a node with a particular name, uncomment the first line and
* comment the second line below.
* - To pass a list of more than one node, comment the first line and uncomment the
* second line below.
*/
singleton.setElectionPolicy(new PreferredSingletonElectionPolicy(new SimpleSingletonElectionPolicy(), new NamePreference("node1/singleton")));
//singleton.setElectionPolicy(new PreferredSingletonElectionPolicy(new SimpleSingletonElectionPolicy(), new NamePreference("node1/singleton"), new NamePreference("node2/singleton")));
singleton.build(new DelegatingServiceContainer(context.getServiceTarget(), context.getServiceRegistry()))
.setInitialMode(ServiceController.Mode.ACTIVE)
.install()
;
}
}