In addition to the JSF-Spring suggestion, you should check out the
following standard Servlet API capabilities:

* HttpSessionBindingListener - lets an instance itself
  be notified when it is bound or unbound into a session
  (the latter happens when the session expires).

* HttpSessionAttributeListener - lets an external listener
  instance be notified when attributes are bound or unbound
  from any session in the application.

* HttpSessionListener - lets an external listener
  instance be notified when sessions are created or expired.

Craig


On Tue, 22 Feb 2005 11:22:17 +0100, Sascha Schmidt
<[EMAIL PROTECTED]> wrote:
>  
> Hello! 
>  
> I'm working on a JSF project that has some backing beans in session scope.
> Now we have the need to register these beans at a messaging system to
> exchange some data. But if the backing beans are registered at a messaging
> system they will never be freeed by the garbage collector. The question is:
> are there any lifecycle methods that are invoked when a backing bean is
> destroyed (end of session)? Is it possible to monito and observe backing
> beans? 
>  
> Thank you! 
>  
> Cheers, 
> Sascha

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