Session Strategy

[Jim Douglas]

To all,
 I have a web application that sets a session attribute with userID and a 
timeout in the config file that times out after 5 minutes in case the user 
walks away.

I am trying to figure out the best strategy to deal with cases where the 
user comes back after 5 minutes and clicks on a button anywhere in the app 
that requires that attribute that just expitred to have a valid value.

Should I,
1> Put code like this in the JSP,
<c:if test="${sessionScope.userID eq 'null'}">
 forward to login page....
</c:if>
2> Or should I just put all the code in the class files, something like 
this,

        Integer userID = 
(Integer)request.getSession().getAttribute("userID");
        if (userID==null){
            return mapping.findForward("failure");
        }

Or
3> ?? I'm open to suggestions!
Thanks,
Jim

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