/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt 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.messaging.core.impl;
import java.util.Iterator;
import java.util.Set;
import org.jboss.logging.Logger;
import org.jboss.messaging.core.contract.ClusterNotification;
import org.jboss.messaging.core.contract.ClusterNotificationListener;
import org.jboss.messaging.core.contract.ClusterNotifier;
import org.jboss.messaging.util.ConcurrentReaderHashSet;
/**
*
* @author <a href="mailto:tim.fox@jboss.com">Tim Fox</a>
* @version <tt>$Revision: $</tt>21 Jun 2007
*
* $Id: $
*
*/
public class DefaultClusterNotifier implements ClusterNotifier
{
private static final Logger log = Logger.getLogger(DefaultClusterNotifier.class);
private Set listeners;
public DefaultClusterNotifier()
{
listeners = new ConcurrentReaderHashSet();
}
public void registerListener(ClusterNotificationListener listener)
{
if (listeners.contains(listener))
{
throw new IllegalStateException("Listener " + listener + " is already registered");
}
listeners.add(listener);
}
public void sendNotification(ClusterNotification notification)
{
Iterator iter = listeners.iterator();
while (iter.hasNext())
{
final ClusterNotificationListener listener = (ClusterNotificationListener)iter.next();
listener.notify(notification);
}
}
public void unregisterListener(ClusterNotificationListener listener)
{
if (!listeners.remove(listener))
{
throw new IllegalStateException("Listener " + listener + " is not registered");
}
}
}