[jboss-user] [EJB 3.0] - Re: MBean as NotificationBroadcaster

[bergander]

I am not experiencing the "The MBean named exists but does not implement the NotificationBroadcaster interface"-error that you get as long as I specify the mbean and not the management interface (type=Management) as a broadcaster.

But my problem is that although the log files tells me that my broadcaster has been subscribed to by the listener, the listener does not receive any notifications.

After some investigation I found out that when using a ListenerServiceMBeanSupport together with a SubscriptionList configuration to subscribe to notifications sent by an EJB3 service bean it seems like the ListenerServiceMBeanSupport bean subscribes to the ServiceDelegateWrapper class instead of the defined bean in the SubscriptionList.

To work around this the following code could be added to the ServiceDelegateWrapper class:


  |   @Override
  |    public void addNotificationListener(NotificationListener listener, 
  |                                                     NotificationFilter filter, 
  |                                                     Object handback) 
  |    {
  | 
  |       if (delegate instanceof ServiceContainer)
  |       {
  |          try
  |          {
  |             ((ServiceContainer) delegate).invoke("addNotificationListener",
  |                new Object[] {listener, filter, handback}, 
  |                new String[] {"javax.management.NotificationListener", 
  |                                    "javax.management.NotificationFilter",
  |                                    "java.lang.Object"});
  | 
  |          }
  |          catch (Exception e)
  |          {
  |             throw new RuntimeException(e);
  |          }
  |       }
  |    }
  | 
  |    @Override
  |    public void removeNotificationListener(NotificationListener listener, 
  |                                                           NotificationFilter filter, 
  |                                                           Object handback)
  |    {
  | 
  |       if (delegate instanceof ServiceContainer)
  |       {
  |          try
  |          {
  |             ((ServiceContainer) delegate).invoke("removeNotificationListener", 
  |                new Object[] {listener, filter, handback}, 
  |                new String[] {"javax.management.NotificationListener", 
  |                                    "javax.management.NotificationFilter", 
  |                                    "java.lang.Object"});
  | 
  |          }
  |          catch (Exception e)
  |          {
  |             throw new RuntimeException(e);
  |          }
  |       }
  |    }
  | 

This has been tested with the 4.0.5 GA release and it seems to work fine. Is this a good way of solving this? Any other suggestions?

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