NotificationHandlers
The NotificationHandlers MBean allows you to create and manage NotificationHandler MBeans. The NotificationHandlers MBean's existence, life cycle, and configuration persistence are controlled by the Loader MBean.
NotificationHandler MBeans allow an administrator to specify logging and/or emailing actions that are to take place upon the occurrence of a JMX notification. One or more MBeans can be listened to by filtering on the types of notifications that are of interest. Administrators can specify additional data to query from the MBean generating the notification or other MBeans when a notification occurs, which is specified to be included in logs and emails.
Some items to note:
• MBeans are referenced via the ObjectName syntax - either an exact ObjectName or an ObjectName pattern. See the ObjectName documentation for more information. Also note that JConsole provides the ObjectName of each MBean on the MBeanInfo table that is displayed in the right pane when you select the MBean.
• If an email subject is not provided, one will be automatically generated upon receipt of a notification from the notification's message and other data.
• You can specify multiple attributes via "*" or fields within a composite data attribute by using "attributeName.fieldName" syntax.
• The NotificationHandler MBean's log level is one of the few logger level attributes that is actually a persistent attribute (meaning that it is reapplied when the JVM restarts). In most other cases, such attributes are merely shortcuts to allow per-JVM-session tweaks and overrides to log4j log levels. An exception is made here to allow easier dynamic creation and specification of new notification handlers.