Thanks! I can see this doing what I need and a lot more that i hadn't yet addressed.
---Raymond
Pavel Veller wrote:
>
> RB> Hi there
> RB> I have a servlet (part of a web appl in JRun 3.0SP2 under Linux) that I would
>like to have detect
> RB> when a user's session has timed out (i.e. the web application session timeout
>has been reached)
> RB> Currently I know that this has happened when my servlet attempts to get a
>RequestDispatcher with...
> RB> "getServletContext().getRequestDispatcher(..."
> RB> ....and gets a NULL back.
> RB> I would like like a clearer way of detecting that the user session is
>invalid/has timed out than
> RB> just the NULL RD since presumable the null RD could have been a result of other
>problems as well.
> RB> Any help or pointers greatly appreciated!
> RB> ---Raymond
>
> You can do as follows: (We use this solutions for logging User sessions):
>
> 1)
> public class UserSession {
> ....
> public boolean begin() {
> .. session started
> }
>
> public boolean end() {
> ... session ended / invalidate
> }
> }
>
> 2)
> final public class HttpUserSession extends UserSession implements
>javax.servlet.http.HttpSessionBindingListener {
>
> public HttpUserSession(){
> super();
> ....
> }
>
> public void valueBound(javax.servlet.http.HttpSessionBindingEvent event) {
> if (!begin()) {
> // log "can not start session tracking"
> }
> }
>
> public void valueUnbound(javax.servlet.http.HttpSessionBindingEvent event) {
> if (!end()) {
> // log "can not finish session tracking"
> }
> }
> }
>
> 3)
> in jsp code: (login_action.jsp)
>
> session.setAttribute(HttpUserSession.class.getName(), new HttpUserSession());
>
>
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