Notify user about session timeout in Java EE

Question

My requirement is to notify the user with a popup saying that the user session is about to time out in x seconds in case user does not perform any activity on the web page.<

Answer 1

I don't think that Java/Java EE will be really helpful here as this need to be handled on the client-side (i.e. using JavaScript). One solution I can think of would be to set a kind of timer that would notify the user a few minutes before the server's timeout.

While googling about this, I found Eric Pascarello's Update User's Session with AJAX blog post (and the reloaded version Updating User Session with Ajax - Round 2) that precisely describes such a solution (and use an XMLHttpRequest to update the session). His Ajax Session Management script is available here.