public class

AttributeChangeNotification

extends Notification
java.lang.Object
   ↳ java.util.EventObject
     ↳ javax.management.Notification
       ↳ javax.management.AttributeChangeNotification

Class Overview

Provides definitions of the attribute change notifications sent by MBeans.

It's up to the MBean owning the attribute of interest to create and send attribute change notifications when the attribute change occurs. So the NotificationBroadcaster interface has to be implemented by any MBean for which an attribute change is of interest.

Example: If an MBean called myMbean needs to notify registered listeners when its attribute:

String myString
is modified, myMbean creates and emits the following notification:
new AttributeChangeNotification(myMbean, sequenceNumber, timeStamp, msg, "myString", "String", oldValue, newValue);

Summary

Constants
String ATTRIBUTE_CHANGE Notification type which indicates that the observed MBean attribute value has changed.
[Expand]
Inherited Fields
From class javax.management.Notification
From class java.util.EventObject
Public Constructors
AttributeChangeNotification(Object source, long sequenceNumber, long timeStamp, String msg, String attributeName, String attributeType, Object oldValue, Object newValue)
Constructs an attribute change notification object.
Public Methods
String getAttributeName()
Gets the name of the attribute which has changed.
String getAttributeType()
Gets the type of the attribute which has changed.
Object getNewValue()
Gets the new value of the attribute which has changed.
Object getOldValue()
Gets the old value of the attribute which has changed.
[Expand]
Inherited Methods
From class javax.management.Notification
From class java.util.EventObject
From class java.lang.Object

Constants

public static final String ATTRIBUTE_CHANGE

Notification type which indicates that the observed MBean attribute value has changed.
The value of this type string is jmx.attribute.change.

Constant Value: "jmx.attribute.change"

Public Constructors

public AttributeChangeNotification (Object source, long sequenceNumber, long timeStamp, String msg, String attributeName, String attributeType, Object oldValue, Object newValue)

Constructs an attribute change notification object. In addition to the information common to all notification, the caller must supply the name and type of the attribute, as well as its old and new values.

Parameters
source The notification producer, that is, the MBean the attribute belongs to.
sequenceNumber The notification sequence number within the source object.
timeStamp The date at which the notification is being sent.
msg A String containing the message of the notification.
attributeName A String giving the name of the attribute.
attributeType A String containing the type of the attribute.
oldValue An object representing value of the attribute before the change.
newValue An object representing value of the attribute after the change.

Public Methods

public String getAttributeName ()

Gets the name of the attribute which has changed.

Returns
  • A String containing the name of the attribute.

public String getAttributeType ()

Gets the type of the attribute which has changed.

Returns
  • A String containing the type of the attribute.

public Object getNewValue ()

Gets the new value of the attribute which has changed.

Returns
  • An Object containing the new value of the attribute.

public Object getOldValue ()

Gets the old value of the attribute which has changed.

Returns
  • An Object containing the old value of the attribute.