/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.clustering.msc;
import java.security.AccessController;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;
import org.jboss.msc.service.Service;
import org.jboss.msc.service.StartContext;
import org.jboss.msc.service.StartException;
import org.jboss.msc.service.StopContext;
import org.jboss.threads.JBossThreadFactory;
/**
* Base service class that executes service start/stop asynchronously.
* @author Paul Ferraro
*/
public abstract class AsynchronousService<T> implements Service<T> {
private final Executor executor;
private final boolean startAsynchronously;
private final boolean stopAsynchronously;
protected AsynchronousService() {
this(true, false);
}
protected AsynchronousService(boolean startAsynchronously, boolean stopAsynchronously) {
this.startAsynchronously = startAsynchronously;
this.stopAsynchronously = stopAsynchronously;
final ThreadFactory factory = new JBossThreadFactory(new ThreadGroup(String.format("%s lifecycle", this.getClass().getSimpleName())),
Boolean.FALSE, null, "%G - %t", null, null, AccessController.getContext());
this. executor = Executors.newCachedThreadPool(factory);
}
@Override
public void start(final StartContext context) throws StartException {
if (this.startAsynchronously) {
Runnable task = new Runnable() {
@Override
public void run() {
try {
AsynchronousService.this.start();
context.complete();
} catch (Exception e) {
context.failed(new StartException(e));
}
}
};
context.asynchronous();
this.executor.execute(task);
} else {
try {
this.start();
} catch (Exception e) {
throw new StartException(e);
}
}
}
@Override
public void stop(final StopContext context) {
if (this.stopAsynchronously) {
Runnable task = new Runnable() {
@Override
public void run() {
try {
AsynchronousService.this.stop();
} finally {
context.complete();
}
}
};
context.asynchronous();
this.executor.execute(task);
} else {
this.stop();
}
}
protected abstract void start() throws Exception;
protected abstract void stop();
}