javax.management

Class NotificationBroadcasterSupport

Contents
  • 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 Excecutor 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 Detail

      • 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

Document created the 11/06/2005, last modified the 04/03/2020
Source of the printed document:https://www.gaudry.be/en/java-api-rf-javax/management/notificationbroadcastersupport.html

The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.

References

  1. View the html document Language of the document:fr Manuel PHP : https://docs.oracle.com

These references and links indicate documents consulted during the writing of this page, or which may provide additional information, but the authors of these sources can not be held responsible for the content of this page.
The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.

Contents Haut