Destroy third party session when logging off portal

[tulip]

Hi All,
Here are my env details:

Jboss Portal : 2.7.0CR1 (deployed from source)
Jboss app server : 4.2.2.GA
JDK: 1.5
Portlet Bridge : B3

We are integrating with a 3rd party software and I am creating a session with the 3rd party application in my jboss portlet. I need to destroy the 3rd party session when user clicks on the portal logout link or clicks on any other tab of the portal. I have stored the 3rd part session in the PortletRequest object. I checked the 'SignoutCommand.java' class and I am not sure how can I get a handle to the portletRequest so I can close the 3rd party session. Is there any other way to close the session?
I am using jboss portlet bridge and richfaces for my portlet implementation.

Appreciate any suggestions/comments.
Thanks

[ronak2121]

I have a similar issue in that I want to invalidate an HTTP Session I have with a Google Web Toolkit Frontend in one of my portlets.

There is no way to detect that the portlet has been closed and then signal through my Portlet and JSP that the HTTPSession should be closed.

Can I do this through a custom JSP tag or Javascript call from my portlet?