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
myMbean creates and emits the following notification:
new AttributeChangeNotification(myMbean, sequenceNumber, timeStamp, msg,
"myString", "String", oldValue, newValue);
| Modifier and Type | Field and Description |
|---|---|
| public static final String | ATTRIBUTE_CHANGE
Notification type which indicates that the observed MBean attribute value has changed. |
| private String | |
| private String | |
| private Object | |
| private Object | |
| private static final long |
| Access | Constructor and Description |
|---|---|
| public | AttributeChangeNotification(Object
The notification producer, that is, the MBean the attribute belongs to. source, long The notification sequence number within the source object. sequenceNumber, long The date at which the notification is being sent. timeStamp, String A String containing the message of the notification. msg, String A String giving the name of the attribute. attributeName, String A String containing the type of the attribute. attributeType, Object An object representing value of the attribute before the change. oldValue, Object An object representing value of the attribute after the change. newValue)Constructs an attribute change notification object. |
| Modifier and Type | Method and Description |
|---|---|
| public String | Returns: A String containing the name of the attribute.Gets the name of the attribute which has changed. |
| public String | Returns: A String containing the type of the attribute.Gets the type of the attribute which has changed. |
| public Object | Returns: An Object containing the new value of the attribute.Gets the new value of the attribute which has changed. |
| public Object | Returns: An Object containing the old value of the attribute.Gets the old value of the attribute which has changed. |
| ATTRIBUTE_CHANGE | back to summary |
|---|---|
| public static final String ATTRIBUTE_CHANGE Notification type which indicates that the observed MBean attribute value has changed.
| |
| attributeName | back to summary |
|---|---|
| private String attributeName | |
| attributeType | back to summary |
|---|---|
| private String attributeType | |
| newValue | back to summary |
|---|---|
private Object newValue
| |
| oldValue | back to summary |
|---|---|
private Object oldValue
| |
| serialVersionUID | back to summary |
|---|---|
| private static final long serialVersionUID | |
| AttributeChangeNotification | back to summary |
|---|---|
| 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.
| |
| getAttributeName | back to summary |
|---|---|
| public String getAttributeName() Gets the name of the attribute which has changed.
| |
| getAttributeType | back to summary |
|---|---|
| public String getAttributeType() Gets the type of the attribute which has changed.
| |
| getNewValue | back to summary |
|---|---|
| public Object getNewValue() Gets the new value of the attribute which has changed.
| |
| getOldValue | back to summary |
|---|---|
| public Object getOldValue() Gets the old value of the attribute which has changed.
| |