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Listeners can either be [SessionListeners|SessionListener], [ContextListeners|ContextListener], or both. This is defined by which interface(s) they implement.
A listener is notified about various events, such as application or session events.
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!More Information
*[SessionListener|SessionListener]
*[ContextListener|ContextListener]
All listeners are defined the same way. Their function depends on which interface(s) they implement.
!Example code demonstrating the <[listener|web.xml.Listener]> and <[listener-class|web.xml.ListenerClass]> elements:
* [Context Listener] example, to listen for application create/destroy events
* [Session Listener] example, to listen for session create/destroy events
* [Session Attribute Listener] example, to listen for changes to session attributes
!See Also
* <[listener-class|web.xml.ListenerClass]> subelement
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