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javax.management
Class AttributeChangeNotification

java.lang.Objec
  |
  +--java.util.EventObjec
        |
        +--javax.management.Notification
              |
              +--
javax.management.AttributeChangeNotification

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public class

AttributeChangeNotification

extends Notification

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);

Version:

1.11

Author:

Cosimo Vampo, Attilio Mattiocco

See Also:

Serialized Form

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Field Summary
static java.lang.String	ATTRIBUTE_CHANGE Notification type which indicates that the observed MBean attribute value has changed.

 

Fields inherited from class javax.management.Notification

source

 

Fields inherited from class java.util.EventObject

source

 

Constructor Summary

java.lang.Object, long, long, java.lang.String, java.lang.String, java.lang.String, java.lang.Object, java.lang.Object)">AttributeChangeNotification(java.lang.Object source, long sequenceNumber, long timeStamp, java.lang.String message, java.lang.String attributeName, java.lang.String type, java.lang.Object oldValue, java.lang.Object newValue) Constructs an attribute change notification object.

 

Method Summary
java.lang.String	getAttributeName() Gets the name of the attribute which has changed.
java.lang.String	getAttributeType() Gets the type of the attribute which has changed.
java.lang.Object	getNewValue() Gets the new value of the attribute which has changed.
java.lang.Object	getOldValue() Gets the old value of the attribute which has changed.

 

Methods inherited from class javax.management.Notification

getMessage, getSequenceNumber, getSource, getTimeStamp, getType, getUserData, setSequenceNumber, java.lang.Object)">setSource, setTimeStamp, java.lang.Object)">setUserData

 

Methods inherited from class java.util.EventObject

toString

 

Methods inherited from class java.lang.Object

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

 

Field Detail

 

ATTRIBUTE_CHANGE

public static final java.lang.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

Constructor Detail

java.lang.Object, long, long, java.lang.String, java.lang.String, java.lang.String, java.lang.Object, java.lang.Object)">

 

AttributeChangeNotification

public 
AttributeChangeNotification
(java.lang.Object source,
                                   long sequenceNumber,
                                   long timeStamp,
                                   java.lang.String message,
                                   java.lang.String attributeName,
                                   java.lang.String type,
                                   java.lang.Object oldValue,
                                   java.lang.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.

message - A String containing the message of the notification.

attributeName - A String giving the name of the attribute.

type - 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.

Method Detail

 

getAttributeName

public java.lang.String 
getAttributeName
()

Gets the name of the attribute which has changed.

Returns:

A String containing the name of the attribute.

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getAttributeType

public java.lang.String 
getAttributeType
()

Gets the type of the attribute which has changed.

Returns:

A String containing type of the attribute

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getOldValue

public java.lang.Object 
getOldValue
()

Gets the old value of the attribute which has changed.

Returns:

An Object containing the old value of the attribute.

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getNewValue

public java.lang.Object 
getNewValue
()

Gets the new value of the attribute which has changed.

Returns:

An Object containing the new value of the attribute.

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