/*
* 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.mx.remoting.rmi;
import java.util.HashMap;
import java.util.Map;
import java.util.List;
import java.util.ArrayList;
import java.util.Set;
import java.util.Iterator;
import java.util.TimerTask;
import java.util.Timer;
import java.io.IOException;
import javax.management.ObjectName;
import javax.management.NotificationListener;
import javax.management.Notification;
import javax.management.NotificationFilter;
import javax.management.remote.rmi.RMIConnection;
import javax.management.remote.NotificationResult;
import javax.management.remote.TargetedNotification;
import org.jboss.logging.Logger;
import org.jboss.util.threadpool.BasicThreadPool;
import org.jboss.util.threadpool.BlockingMode;
import EDU.oswego.cs.dl.util.concurrent.ReaderPreferenceReadWriteLock;
import EDU.oswego.cs.dl.util.concurrent.SyncMap;
/**
* @author <a href="mailto:telrod@e2technologies.net">Tom Elrod</a>
*/
/*
* The ClientNotifier is created within the RMIConnector but only used within the
* ClientMBeanServerConnection so that there is only one instance of the ClientNotifier
* per JMXConnector. This is because the user could get multiple ClientMBeanServerConnections
* (via RMIConnector::getMBeanServerConnection()), so don't want to create ClientNotifier within
* ClientMBeanServerConnections because would then multiple of the them to track and close when
* the connector itself is closed.
*/
public class ClientNotifier extends TimerTask
{
private Map clientListeners = null;
private Timer fetchTimer = null;
private RMIConnection connection = null;
//TODO: -TME Need to make fetch timeout configurable (JBREM-151)
private long fetchTimeout = 1000;
private long clientSequenceNumber = -1;
private int maxNotifications = 10;
private BasicThreadPool notifierPool = null;
private int maxNumberThreads = 20;
private static final Logger log = Logger.getLogger(ClientNotifier.class);
public ClientNotifier(RMIConnection rmiConnection)
{
this.connection = rmiConnection;
clientListeners = new SyncMap(new HashMap(), new ReaderPreferenceReadWriteLock());
fetchTimer = new Timer(true);
//TODO: -TME Need to make the fetch period configurable (JBREM-151)
fetchTimer.schedule(this, 1000, 1000);
notifierPool = new BasicThreadPool("JBoss JMX Remoting client notifier");
notifierPool.setMaximumPoolSize(maxNumberThreads);
notifierPool.setBlockingMode(BlockingMode.WAIT);
}
/**
* The action to be performed by this timer task.
*/
public void run()
{
try
{
NotificationResult result = connection.fetchNotifications(clientSequenceNumber, maxNotifications, fetchTimeout);
if(result != null)
{
clientSequenceNumber = result.getNextSequenceNumber();
TargetedNotification[] targetedNotifications = result.getTargetedNotifications();
if(targetedNotifications != null)
{
deliverNotifications(targetedNotifications);
}
}
else
{
log.error("Fetched notifications and result was null.");
}
}
catch(IOException e)
{
log.error("Error fetching notifications for sequence number " + clientSequenceNumber, e);
}
}
private void deliverNotifications(TargetedNotification[] targetedNotifications)
{
for(int x = 0; x < targetedNotifications.length; x++)
{
TargetedNotification targetedNotification = targetedNotifications[x];
Integer id = targetedNotification.getListenerID();
ClientListenerHolder holder = (ClientListenerHolder)clientListeners.get(id);
if(holder != null)
{
final Notification notification = targetedNotification.getNotification();
boolean deliverNotification = true;
if(holder.getFilterOnClient())
{
NotificationFilter filter = holder.getFilter();
if(!filter.isNotificationEnabled(notification))
{
deliverNotification = false;
}
}
if(deliverNotification)
{
final NotificationListener listener = holder.getListener();
final Object handback = holder.getHandback();
Runnable notifyRun = new Runnable()
{
public void run()
{
try
{
listener.handleNotification(notification, handback);
}
catch(Throwable e)
{
log.error("Error delivering notification to listener: " + listener, e);
}
}
};
notifierPool.run(notifyRun);
}
}
}
}
public boolean exists(ClientListenerHolder holder)
{
return clientListeners.containsValue(holder);
}
public void addNotificationListener(Integer listenerID, ClientListenerHolder holder)
{
clientListeners.put(listenerID, holder);
}
public Integer[] getListeners(ObjectName name, NotificationListener listener)
{
List idList = new ArrayList();
Set keys = clientListeners.keySet();
Iterator itr = keys.iterator();
while(itr.hasNext())
{
Integer id = (Integer)itr.next();
ClientListenerHolder holder = (ClientListenerHolder)clientListeners.get(id);
if(holder.getObjectName().equals(name) && holder.getListener().equals(listener))
{
idList.add(id);
}
}
Integer[] ids = new Integer[idList.size()];
ids = (Integer[])idList.toArray(ids);
return ids;
}
public void removeListeners(Integer[] ids)
{
for(int x = 0; x < ids.length; x++)
{
clientListeners.remove(ids[x]);
}
}
public Integer getListener(ClientListenerHolder clientListenerHolder)
{
Iterator itr = clientListeners.entrySet().iterator();
while(itr.hasNext())
{
Map.Entry value = (Map.Entry)itr.next();
if(value.getValue().equals(clientListenerHolder))
{
return (Integer)value.getKey();
}
}
return null;
}
public void close()
{
fetchTimer.cancel();
}
}