NotificationListener (Java SE 26 & JDK 26)
Description: declaration: module: java.management, package: javax.management, interface: NotificationListener
Keywords: javax.management.NotificationListener interface

# Interface NotificationListener

All Superinterfaces:
  `EventListener`

All Known Implementing Classes:
  `RelationService`

public interface NotificationListener extends EventListener
Should be implemented by an object that wants to receive notifications.

Since:
  1.5

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `handleNotification(Notification notification, Object handback)`
  Invoked when a JMX notification occurs.

- ## Method Details

  - ### handleNotification

    void handleNotification(Notification notification, Object handback)
    Invoked when a JMX notification occurs. The implementation of this method should return as soon as possible, to avoid blocking its notification broadcaster.
    Parameters:
      `notification` - The notification.
      `handback` - An opaque object which helps the listener to associate information regarding the MBean emitter. This object is passed to the addNotificationListener call and resent, without modification, to the listener.