Examples of javax.management.NotificationListener

javax.management.NotificationListener
Must be implemented by objects receiving JMX notifications. @author Juha Lindfors. @version $Revision: 1.3 $

                logger.trace("NotifFetcher.dispatch",
                             "Listener ID not in map");
                return;
            }


            NotificationListener l = li.getListener();
            Object h = li.getHandback();
            try {
                l.handleNotification(notif, h);
            } catch (RuntimeException e) {
                final String msg =
                    "Failed to forward a notification " +
                    "to a listener";
                logger.trace("NotifFetcher-run", msg, e);

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        if (listener == null) {
            throw new RuntimeOperationsException(new
                IllegalArgumentException("Null listener"),"Null listener");
        }


        NotificationListener listenerWrapper =
            getListenerWrapper(listener, name, instance, true);
        broadcaster.addNotificationListener(listenerWrapper, filter, handback);
    }

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    }


    public void removeNotificationListener(ObjectName name,
                                           ObjectName listener)
            throws InstanceNotFoundException, ListenerNotFoundException {
        NotificationListener instance = getListener(listener);


        if (MBEANSERVER_LOGGER.isLoggable(Level.FINER)) {
            MBEANSERVER_LOGGER.logp(Level.FINER,
                    DefaultMBeanServerInterceptor.class.getName(),
                    "removeNotificationListener",

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                                           ObjectName listener,
                                           NotificationFilter filter,
                                           Object handback)
            throws InstanceNotFoundException, ListenerNotFoundException {


        NotificationListener instance = getListener(listener);


        if (MBEANSERVER_LOGGER.isLoggable(Level.FINER)) {
            MBEANSERVER_LOGGER.logp(Level.FINER,
                    DefaultMBeanServerInterceptor.class.getName(),
                    "removeNotificationListener",

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        Class<? extends NotificationBroadcaster> reqClass =
            removeAll ? NotificationBroadcaster.class : NotificationEmitter.class;
        NotificationBroadcaster broadcaster =
            getNotificationBroadcaster(name, instance, reqClass);


        NotificationListener listenerWrapper =
            getListenerWrapper(listener, name, instance, false);


        if (listenerWrapper == null)
            throw new ListenerNotFoundException("Unknown listener");

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        Object resource = getResource(mbean);
        ListenerWrapper wrapper = new ListenerWrapper(l, name, resource);
        synchronized (listenerWrappers) {
            WeakReference<ListenerWrapper> ref = listenerWrappers.get(wrapper);
            if (ref != null) {
                NotificationListener existing = ref.get();
                if (existing != null)
                    return existing;
            }
            if (create) {
                ref = new WeakReference<ListenerWrapper>(wrapper);

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        // loop on listener
        //
        for(java.util.Enumeration<NotificationListener> k = handbackTable.keys();
            k.hasMoreElements(); ) {


            NotificationListener listener = k.nextElement();


            // Get the associated handback list and the associated filter list
            //
            java.util.Vector<?> handbackList = handbackTable.get(listener) ;
            java.util.Vector<NotificationFilter> filterList =
                filterTable.get(listener) ;


            // loop on handback
            //
            java.util.Enumeration<NotificationFilter> f = filterList.elements();
            for(java.util.Enumeration<?> h = handbackList.elements();
                h.hasMoreElements(); ) {


                Object handback = h.nextElement();
                NotificationFilter filter = f.nextElement();


                if ((filter == null) ||
                     (filter.isNotificationEnabled(notification))) {


                    listener.handleNotification(notification,handback) ;
                }
            }
        }
    }

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      ObjectName objName = new ObjectName("test:name=sample");
      connection.createMBean(Sample.class.getName(), objName);
      Object ret = connection.invoke(objName, "doSomething", new Object[] {"foo"}, new String[] {String.class.getName()});
      System.out.println("Return to doSomething() is " + ret);


      NotificationListener listener = new Listener();
      connection.addNotificationListener(objName,listener, null, null);


      ret = connection.invoke(objName, "doSomething", new Object[] {"bar"}, new String[] {String.class.getName()});
      System.out.println("Return to doSomething() is " + ret);

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                  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);
                     }

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        // loop on listener
        //
        for(java.util.Enumeration k = handbackTable.keys(); 
      k.hasMoreElements(); ) {
            
            NotificationListener listener = 
    (NotificationListener) k.nextElement();


            // Get the associated handback list and the associated filter list
            //
            java.util.Vector handbackList = 
    (java.util.Vector) handbackTable.get(listener) ;
            java.util.Vector filterList = 
    (java.util.Vector) filterTable.get(listener) ;


            // loop on handback
            // 
            java.util.Enumeration f = filterList.elements();
            for(java.util.Enumeration h = handbackList.elements();
    h.hasMoreElements(); ) {
                
                Object handback = h.nextElement();
                NotificationFilter filter = 
        (NotificationFilter)f.nextElement();


                if ((filter == null) || 
                    ((filter != null) && 
         (filter.isNotificationEnabled(notification)))) {
        
                    listener.handleNotification(notification,handback) ;
                }
            }
        }
    }

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