mx4j.remote

Class DefaultRemoteNotificationServerHandler

java.lang.Object

mx4j.remote.DefaultRemoteNotificationServerHandler

All Implemented Interfaces:

RemoteNotificationServerHandler

public class DefaultRemoteNotificationServerHandler
extends java.lang.Object
implements RemoteNotificationServerHandler

Base implementation of the RemoteNotificationServerHandler interface.

Version:

$Revision: 1.12 $

Constructor Summary

Constructors

Constructor and Description
DefaultRemoteNotificationServerHandler(java.util.Map environment) Creates a new remote notification server handler.

Method Summary

Modifier and Type	Method and Description
void	addNotificationListener(java.lang.Integer id, NotificationTuple tuple) Adds the given tuple with the given listener ID to this handler
NotificationTuple[]	close() Closes this handler, that will not accept anymore add or removal of listeners
javax.management.remote.NotificationResult	fetchNotifications(long sequenceNumber, int maxNotifications, long timeout) Fetches notifications from the notification buffer in order to send them to the client side
protected javax.management.remote.TargetedNotification[]	filterNotifications(javax.management.remote.TargetedNotification[] notifications) This method filters the given notification array and returns a possibly smaller array containing only notifications that passed successfully the filtering.
java.lang.Integer	generateListenerID(javax.management.ObjectName name, javax.management.NotificationFilter filter) Returns a unique ID for a client-side NotificationListener
protected Logger	getLogger()
javax.management.NotificationListener	getServerNotificationListener() Returns the unique server side listener that will represent client-side listeners on MBeans.
NotificationTuple	removeNotificationListener(java.lang.Integer id) Removes the listener with the given ID from this handler
protected boolean	waitForNotifications(java.lang.Object lock, long timeout) Called when there are no notifications to send to the client.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultRemoteNotificationServerHandler

public DefaultRemoteNotificationServerHandler(java.util.Map environment)

Creates a new remote notification server handler.

Parameters:

environment - Contains environment variables used to configure this handler

See Also:

MX4JRemoteConstants.NOTIFICATION_BUFFER_CAPACITY, MX4JRemoteConstants.NOTIFICATION_PURGE_DISTANCE

Method Detail

generateListenerID

public java.lang.Integer generateListenerID(javax.management.ObjectName name,
                                            javax.management.NotificationFilter filter)

Description copied from interface: RemoteNotificationServerHandler

Returns a unique ID for a client-side NotificationListener

Specified by:

generateListenerID in interface RemoteNotificationServerHandler

See Also:

RemoteNotificationServerHandler.addNotificationListener(java.lang.Integer, mx4j.remote.NotificationTuple)

getServerNotificationListener

public javax.management.NotificationListener getServerNotificationListener()

Description copied from interface: RemoteNotificationServerHandler

Returns the unique server side listener that will represent client-side listeners on MBeans.

Specified by:

getServerNotificationListener in interface RemoteNotificationServerHandler

addNotificationListener

public void addNotificationListener(java.lang.Integer id,
                                    NotificationTuple tuple)

Description copied from interface: RemoteNotificationServerHandler

Adds the given tuple with the given listener ID to this handler

Specified by:

addNotificationListener in interface RemoteNotificationServerHandler

See Also:

RemoteNotificationServerHandler.removeNotificationListener(java.lang.Integer)

removeNotificationListener

public NotificationTuple removeNotificationListener(java.lang.Integer id)

Description copied from interface: RemoteNotificationServerHandler

Removes the listener with the given ID from this handler

Specified by:

removeNotificationListener in interface RemoteNotificationServerHandler

See Also:

RemoteNotificationServerHandler.addNotificationListener(java.lang.Integer, mx4j.remote.NotificationTuple)

fetchNotifications

public javax.management.remote.NotificationResult fetchNotifications(long sequenceNumber,
                                                                     int maxNotifications,
                                                                     long timeout)
                                                              throws java.io.IOException

Description copied from interface: RemoteNotificationServerHandler

Fetches notifications from the notification buffer in order to send them to the client side

Specified by:

fetchNotifications in interface RemoteNotificationServerHandler

Throws:

java.io.IOException - If this handler has already been closed

close

public NotificationTuple[] close()

Description copied from interface: RemoteNotificationServerHandler

Closes this handler, that will not accept anymore add or removal of listeners

Specified by:

close in interface RemoteNotificationServerHandler

Returns:

The NotificationTuples currently held

See Also:

RemoteNotificationServerHandler.fetchNotifications(long, int, long)

waitForNotifications

protected boolean waitForNotifications(java.lang.Object lock,
                                       long timeout)

Called when there are no notifications to send to the client. It is guaranteed that no notification can be added before this method waits on the given lock. It should wait on the given lock for the specified timeout, and return true to send notifications (if no notifications arrived, an empty notification array will be returned to the client), or false if no notifications should be sent to the client.

Parameters:

lock - The object on which Object.wait(long) should be called

timeout - The amount of time to wait (guaranteed to be strictly greater than 0)

filterNotifications

protected javax.management.remote.TargetedNotification[] filterNotifications(javax.management.remote.TargetedNotification[] notifications)

This method filters the given notification array and returns a possibly smaller array containing only notifications that passed successfully the filtering. Default behavior is no filtering, but subclasses may choose to change this bahavior. For example, for RMI, one can assure that all notifications are truly serializable, and log those that are not.

getLogger

protected Logger getLogger()