session required for struts

[Adam Hardy]

I wrote a filter to enable me to overwrite the request and response 
objects with my custom ones - I want to disable use of the session for 
various requests, e.g. google bots, requests to some pages on my site.

My problem is with the custom request - I overrode the 
request.getSession() to return null for these requests. However this 
seems to make struts choke.

The reason I did this is that I think creating a session & then calling 
session.invalidate() in the filter is redundant. I wanted to avoid 
creating the session completely.

Then I can also use the test (session != null) for the logic in my 
action classes to prevent unnecessary processing.

Is the session permanently featured in struts internals? Am I obliged to 
have sessions, even if only for the duration of individual requests?

Adam

PS I did ask this on the tomcat list, so I suppose I'm cross-posting, 
but I didn't get any response so I'm presuming it was just OT.
--
struts 1.1 + tomcat 5.0.14 + java 1.4.2
Linux 2.4.20 RH9

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