Why am I not receiving Notifications?

[mskonda]

My primary goal is to receive notifications from Naming (JNDI) MBean - that is, receive notifications for any additions or deletions or modificatios to the JNDI namespace.

I have followed the wiki ListenerServiceMBeanSupport example and created a dummy notication lsitener which just prints out the info messages.

The xxx-service.xml is given below:

<?xml version="1.0" encoding="UTF-8"?>

<server>

 <mbean code="com.cmi2.facility.notifications.JNDINotificationListener"
 name="cmi2-listeners:faciltiy=jndiNotifactionListener">
 <attribute name="SubscriptionList">
 <subscription-list>
 <mbean name="jboss:service=Naming">
 <filter factory="AttributeChangeNotificationFilterFactory">
 <enable attribute-name="State"/>
 <enable attribute-name="Name"/>
 <enable attribute-name="MethodMap"/>
 </filter>
 </mbean>
 </subscription-list>
 </attribute>
 </mbean>
</server>

Unfortunately I can't get see any notifications received when I bind/unbind objects to the jndi namespace.

My listener is below:

public class JNDINotificationListener extends ListenerServiceMBeanSupport
 implements JNDINotificationListenerMBean {
 /*
 * Logger
 */
 private Logger logger =
 Logger.getLogger(AbstractFlowComponent.class.getName());

 public JNDINotificationListener()
 {
 logger.info("JNDINotificationListener constructor");
 }

 public void startService() throws Exception
 {
 super.subscribe(true);
 }

 public void stopService() throws Exception
 {
 super.unsubscribe();
 }
 public void handleNotification2(Notification n, Object handBack)
 {
 logger.info("Received Notification: "+n+", handback: "+handBack);
 }
}

Ideally i want to extend the notification listeners for other services too..

Any pointers to what I'm doing wrong?

Thanks
Madhu

[dimitris]

I don't remember if the naming service produces notifications when things are bound/unbound. Are you sure?

[mskonda]

I am assuming and expecting Naming MBean to produce Notifications, but not sure it does. I'll check the source code to see if I can dig any info on this.

If Naming MBean doesn't produce notifications as I assumed, do you know if any way I can achieve the same thing, Dimitris? Or is it easy for me to incorporate code change to produce notifications (perhaps feature request?)

Thanks
Madhu

[mskonda]

You are correct that the Naming service does not produce Notifications on bind/rebind/unbind operations (I'm looking at org.jnp.server.NamingServer.java).

Well, as I have a requirement to listen to the notifications, I am wonderign the best way to proceed to incorporate notification broadcasting from NamingSever.

I think I have two ways

1. Incorporate notifications in NamingServer itself (this means I'll have to change the code)

2. Extend NamingServer with notification broadcast support.

I am not sure how the second point turns out to be.

Any ideas/suggestions?

Thanks
Madhu