Class AttributeChangeNotification
java.lang.Object
java.util.EventObject
javax.management.Notification
javax.management.AttributeChangeNotification
- All Implemented Interfaces:
Serializable
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);
- Since:
- 1.5
- See Also:
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Field Summary
Modifier and TypeFieldDescriptionstatic final String
Notification type which indicates that the observed MBean attribute value has changed.Fields inherited from class javax.management.Notification
source
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionGets the name of the attribute which has changed.Gets the type of the attribute which has changed.Gets the new value of the attribute which has changed.Gets the old value of the attribute which has changed.Methods inherited from class javax.management.Notification
getMessage, getSequenceNumber, getTimeStamp, getType, getUserData, setSequenceNumber, setSource, setTimeStamp, setUserData, toString
Methods inherited from class java.util.EventObject
getSource
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Field Details
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ATTRIBUTE_CHANGE
Notification type which indicates that the observed MBean attribute value has changed.
The value of this type string isjmx.attribute.change
.- See Also:
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Constructor Details
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AttributeChangeNotification
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.
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Method Details
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getAttributeName
Gets the name of the attribute which has changed.- Returns:
- A String containing the name of the attribute.
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getAttributeType
Gets the type of the attribute which has changed.- Returns:
- A String containing the type of the attribute.
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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
Gets the new value of the attribute which has changed.- Returns:
- An Object containing the new value of the attribute.
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