https://openjdk.java.net/ 
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package javax.management;



Should be implemented by an object that wants to receive notifications.

Since:1.5
/**
 * Should be implemented by an object that wants to receive notifications.
 *
 * @since 1.5
 */
public interface NotificationListener extends java.util.EventListener   {

    
Invoked when a JMX notification occurs.
The implementation of this method should return as soon as possible, to avoid
blocking its notification broadcaster.

Params:
  • notification – The notification.
  • handback – An opaque object which helps the listener to associate information
regarding the MBean emitter. This object is passed to the MBean during the
addListener call and resent, without modification, to the listener. The MBean object
should not use or modify the object.
/**
    * Invoked when a JMX notification occurs.
    * The implementation of this method should return as soon as possible, to avoid
    * blocking its notification broadcaster.
    *
    * @param notification The notification.
    * @param handback An opaque object which helps the listener to associate information
    * regarding the MBean emitter. This object is passed to the MBean during the
    * addListener call and resent, without modification, to the listener. The MBean object
    * should not use or modify the object.
    *
    */
    public void handleNotification(Notification notification, Object handback) ;
}