Serializable
public class AttributeChangeNotification extends Notification
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);
Modifier and Type | Field | Description |
---|---|---|
static final String |
ATTRIBUTE_CHANGE |
Notification type which indicates that the observed MBean attribute value has changed. |
source
Constructor | Description |
---|---|
AttributeChangeNotification |
Constructs an attribute change notification object. |
Modifier and Type | Method | Description |
---|---|---|
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. |
getMessage, getSequenceNumber, getTimeStamp, getType, getUserData, setSequenceNumber, setSource, setTimeStamp, setUserData, toString
getSource
public static final String ATTRIBUTE_CHANGE
jmx.attribute.change
.public AttributeChangeNotification(Object source, long sequenceNumber, long timeStamp, String msg, String attributeName, String attributeType, Object oldValue, Object newValue)
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 String getAttributeName()
public String getAttributeType()
public Object getOldValue()
public Object getNewValue()
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https://docs.oracle.com/en/java/javase/21/docs/api/java.management/javax/management/AttributeChangeNotification.html