/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, 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.security.InvalidParameterException;
import java.util.Collection;
import java.util.LinkedList;
import javax.management.InstanceNotFoundException;
import javax.management.ListenerNotFoundException;
import javax.management.MBeanException;
import javax.management.MalformedObjectNameException;
import javax.management.Notification;
import javax.management.NotificationListener;
import javax.management.ObjectName;
import javax.management.ReflectionException;
import org.jboss.system.ServiceMBeanSupport;
/**
*
* This MBean is an example that shows how to delegate notification services to a HANotificationBroadcaster.
* 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@jboss.org>
*
*/
public class HANotificationBroadcasterClientExample
extends ServiceMBeanSupport
implements HANotificationBroadcasterClientExampleMBean, NotificationListener
{
/**
*
* On service start, subscribes to notification sent by this broadcaster or its remote peers.
*
*/
protected void startService() throws Exception
{
super.startService();
addHANotificationListener(this);
}
/**
*
* On service stop, unsubscribes to notification sent by this broadcaster or its remote peers.
*
*/
protected void stopService() throws Exception
{
removeHANotificationListener(this);
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 sendTextMessageViaHANBExample(String message)
throws InstanceNotFoundException, MBeanException, ReflectionException
{
long now = System.currentTimeMillis();
Notification notification =
new Notification(
"hanotification.example.counter",
super.getServiceName(),
now,
now,
message);
server.invoke(
broadcasterName_,
"sendNotification",
new Object[] { notification },
new String[] { Notification.class.getName() }
);
}
/**
* Lists the notifications received on the cluster partition
*/
public Collection getReceivedNotifications()
{
return messages_;
}
/**
* @return the name of the broadcaster MBean
*/
public String getHANotificationBroadcasterName()
{
return broadcasterName_ == null ? null : broadcasterName_.toString();
}
/**
*
* Sets the name of the broadcaster MBean.
*
* @param
*/
public void setHANotificationBroadcasterName(String newBroadcasterName)
throws InvalidParameterException
{
if (newBroadcasterName == null)
{
throw new InvalidParameterException("Broadcaster MBean must be specified");
}
try
{
broadcasterName_ = new ObjectName(newBroadcasterName);
}
catch (MalformedObjectNameException mone)
{
log.error("Broadcaster MBean Object Name is malformed", mone);
throw new InvalidParameterException("Broadcaster MBean is not correctly formatted");
}
}
protected void addHANotificationListener(NotificationListener listener) throws InstanceNotFoundException
{
server.addNotificationListener(broadcasterName_, listener,
/* no need for filter */ null,
/* no handback object */ null);
}
protected void removeHANotificationListener(NotificationListener listener) throws InstanceNotFoundException, ListenerNotFoundException
{
server.removeNotificationListener(broadcasterName_, listener);
}
public void handleNotification(
Notification notification,
java.lang.Object handback)
{
messages_.add(notification.getMessage());
}
// Attributes ----------------------------------------------
Collection messages_ = new LinkedList();
/**
* The broadcaster MBean that this class listens to and delegates HA notifications to
*/
ObjectName broadcasterName_ = null;
}
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