/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, 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.ha.jmx.examples;
import java.util.Collection;
import java.util.LinkedList;
import javax.management.Notification;
import javax.management.NotificationListener;
import org.jboss.ha.jmx.HAServiceMBeanSupport;
/**
*
* This MBean is an example showing how to extend a cluster notification broadcaster
* Use the sendNotiication() operation to trigger new clustered notifications.
* Observe the status of each instance of this mbean in the participating cluster partition nodes.
*
* @author Ivelin Ivanov <ivelin@apache.org>
*
*/
public class HANotificationBroadcasterExample
extends HAServiceMBeanSupport
implements HANotificationBroadcasterExampleMBean
{
/**
*
* On service start, subscribes to notification sent by this broadcaster or its remote peers.
*
*/
protected void startService() throws Exception
{
super.startService();
addNotificationListener(listener_, /* no need for filter */ null, /* no handback object */ null);
}
/**
*
* On service stop, unsubscribes to notification sent by this broadcaster or its remote peers.
*
*/
protected void stopService() throws Exception
{
removeNotificationListener(listener_);
super.stopService();
}
/**
* Broadcasts a notification to the cluster partition.
*
* This example does not ensure that a notification sequence number
* is unique throughout the partition.
*
*/
public void sendTextMessage(String message)
{
long now = System.currentTimeMillis();
Notification notification =
new Notification("hanotification.example.counter", super.getServiceName(), now, now, message);
sendNotification(notification);
}
/**
* Lists the notifications received on the cluster partition
*/
public Collection getReceivedNotifications()
{
return messages_;
}
Collection messages_ = new LinkedList();
NotificationListener listener_ = new NotificationListener()
{
public void handleNotification(Notification notification,
java.lang.Object handback)
{
messages_.add( notification.getMessage() );
}
};
}