java.lang.Object
   java.util.EventObject
      javax.management.Notification
         javax.management.MBeanServerNotification

All Implemented Interfaces:
    Serializable

To receive MBeanServerNotifications, you need to register a listener with the MBeanServerDelegate MBean that represents the MBeanServer. The ObjectName of the MBeanServerDelegate is MBeanServerDelegate#DELEGATE_NAME , which is JMImplementation:type=MBeanServerDelegate.

The following code prints a message every time an MBean is registered or unregistered in the MBean Server {@code mbeanServer}:

private static final NotificationListener printListener = new NotificationListener() {
    public void handleNotification(Notification n, Object handback) {
        if (!(n instanceof MBeanServerNotification)) {
            System.out.println("Ignored notification of class " + n.getClass().getName());
            return;
        }
        MBeanServerNotification mbsn = (MBeanServerNotification) n;
        String what;
        if (n.getType().equals(MBeanServerNotification.REGISTRATION_NOTIFICATION))
            what = "MBean registered";
        else if (n.getType().equals(MBeanServerNotification.UNREGISTRATION_NOTIFICATION))
            what = "MBean unregistered";
        else
            what = "Unknown type " + n.getType();
        System.out.println("Received MBean Server notification: " + what + ": " +
                mbsn.getMBeanName());
    }
};

...
    mbeanServer.addNotificationListener(
            MBeanServerDelegate.DELEGATE_NAME, printListener, null, null);

An MBean which is not an MBeanServerDelegate may also emit MBeanServerNotifications. In particular, there is a convention for MBeans to emit an MBeanServerNotification for a group of MBeans.

An MBeanServerNotification emitted to denote the registration or unregistration of a group of MBeans has the following characteristics:

• Its {@linkplain Notification#getType() notification type} is {@code "JMX.mbean.registered.group"} or {@code "JMX.mbean.unregistered.group"}, which can also be written MBeanServerNotification#REGISTRATION_NOTIFICATION {@code + ".group"} or MBeanServerNotification#UNREGISTRATION_NOTIFICATION {@code + ".group"}.
• Its {@linkplain #getMBeanName() MBean name} is an ObjectName pattern that selects the set (or a superset) of the MBeans being registered or unregistered
• Its {@linkplain Notification#getUserData() user data} can optionally be set to an array of ObjectNames containing the names of all MBeans being registered or unregistered.

MBeans which emit these group registration/unregistration notifications will declare them in their MBeanNotificationInfo .

since: 1.5 -

 public MBeanServerNotification(String type,
    Object source,
    long sequenceNumber,
    ObjectName objectName) 
{
        super(type, source, sequenceNumber);
        this.objectName = objectName;
}

 public ObjectName getMBeanName() 
{
        return objectName;
}

 public String toString() 
{
        return super.toString() + "[mbeanName=" + objectName + "]";
}