Trying to register logout when session is finished

[rmemoria.ricardo.rmemoria.com.br]

I'm using SEAM 2.1.1.GA with JBOSS 4.2.3.GA.

I have the following method to be called when the the user session is destroyed:

    /**
     * Logout the current user 
     */
    @Observer("org.jboss.seam.preDestroyContext.SESSION")
    @Transactional
    public void logout() {
         if (userLogin != null)
            System.out.println("LOGOUT OF " + userLogin.getUser().getLogin());
         else System.out.println("LOGOUT");

         onlineUsers.remove(userLogin);
        registerLogout();
    }

Buf the method is never called. Checking the jboss log I see the following error registered:

2009-04-22 10:04:07,826 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/mdrtb]] Session event listener threw exception
java.lang.IllegalStateException: Please end the HttpSession via org.jboss.seam.web.Session.instance().invalidate()
     at org.jboss.seam.contexts.Lifecycle.endSession(Lifecycle.java:239)
     at org.jboss.seam.contexts.ServletLifecycle.endSession(ServletLifecycle.java:146)
     at org.jboss.seam.servlet.SeamListener.sessionDestroyed(SeamListener.java:58)
     at org.apache.catalina.session.StandardSession.expire(StandardSession.java:702)
     at org.apache.catalina.session.StandardSession.isValid(StandardSession.java:592)
     at org.apache.catalina.session.ManagerBase.processExpires(ManagerBase.java:681)
     at org.apache.catalina.session.ManagerBase.backgroundProcess(ManagerBase.java:666)
     at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1315)
     at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1600)
     at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1609)
     at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1609)
     at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1589)
     at java.lang.Thread.run(Thread.java:619)

Any tip about mapping the end session event or about this error?

Cheers,
Ricardo

[rmemoria.ricardo.rmemoria.com.br]

I found the problem (or at least a workaround):

I moved the component with the @Observer(org.jboss.seam.preDestroyContext.SESSION) to the session context (previously it was in the default event context).

So that's it? Event context components cannot map events like that?

Ricardo