Module java.management
Package javax.management

Class NotificationBroadcasterSupport

java.lang.Object
javax.management.NotificationBroadcasterSupport
All Implemented Interfaces:
NotificationBroadcaster, NotificationEmitter
Direct Known Subclasses:
JMXConnectorServer, Monitor, RelationService, Timer
public class NotificationBroadcasterSupport extends Object implements NotificationEmitter

Provides an implementation of NotificationEmitter interface. This can be used as the super class of an MBean that sends notifications.

By default, the notification dispatch model is synchronous. That is, when a thread calls sendNotification, the NotificationListener.handleNotification method of each listener is called within that thread. You can override this default by overriding handleNotification in a subclass, or by passing an Executor to the constructor.

If the method call of a filter or listener throws an Exception, then that exception does not prevent other listeners from being invoked. However, if the method call of a filter or of Executor.execute or of handleNotification (when no Executor is specified) throws an Error, then that Error is propagated to the caller of sendNotification.

Remote listeners added using the JMX Remote API (see JMXConnector) are not usually called synchronously. That is, when sendNotification returns, it is not guaranteed that any remote listeners have yet received the notification.

Since:
1.5

  • Constructor Details

    • NotificationBroadcasterSupport

      public NotificationBroadcasterSupport()
      Constructs a NotificationBroadcasterSupport where each listener is invoked by the thread sending the notification. This constructor is equivalent to NotificationBroadcasterSupport(null, null).

    • NotificationBroadcasterSupport

      public NotificationBroadcasterSupport(Executor executor)
      Constructs a NotificationBroadcasterSupport where each listener is invoked using the given Executor. When sendNotification is called, a listener is selected if it was added with a null NotificationFilter, or if isNotificationEnabled returns true for the notification being sent. The call to NotificationFilter.isNotificationEnabled takes place in the thread that called sendNotification. Then, for each selected listener, executor.execute is called with a command that calls the handleNotification method. This constructor is equivalent to NotificationBroadcasterSupport(executor, null).
      Parameters:
      executor - an executor used by the method sendNotification to send each notification. If it is null, the thread calling sendNotification will invoke the handleNotification method itself.
      Since:
      1.6

    • NotificationBroadcasterSupport

      public NotificationBroadcasterSupport(MBeanNotificationInfo... info)

      Constructs a NotificationBroadcasterSupport with information about the notifications that may be sent. Each listener is invoked by the thread sending the notification. This constructor is equivalent to NotificationBroadcasterSupport(null, info).

      If the info array is not empty, then it is cloned by the constructor as if by info.clone(), and each call to getNotificationInfo() returns a new clone.

      Parameters:
      info - an array indicating, for each notification this MBean may send, the name of the Java class of the notification and the notification type. Can be null, which is equivalent to an empty array.
      Since:
      1.6

    • NotificationBroadcasterSupport

      public NotificationBroadcasterSupport(Executor executor, MBeanNotificationInfo... info)

      Constructs a NotificationBroadcasterSupport with information about the notifications that may be sent, and where each listener is invoked using the given Executor.

      When sendNotification is called, a listener is selected if it was added with a null NotificationFilter, or if isNotificationEnabled returns true for the notification being sent. The call to NotificationFilter.isNotificationEnabled takes place in the thread that called sendNotification. Then, for each selected listener, executor.execute is called with a command that calls the handleNotification method.

      If the info array is not empty, then it is cloned by the constructor as if by info.clone(), and each call to getNotificationInfo() returns a new clone.

      Parameters:
      executor - an executor used by the method sendNotification to send each notification. If it is null, the thread calling sendNotification will invoke the handleNotification method itself.
      info - an array indicating, for each notification this MBean may send, the name of the Java class of the notification and the notification type. Can be null, which is equivalent to an empty array.
      Since:
      1.6

  • Method Details