Question

Can one run a method in java or javascript before the allocated tomcat session expires? For ex. User 1’s sessions expires which will in turn ‘trigger’ a method to run before it expires? So my question is, is there any way to tell if the sessions expires (ex. session exception) which will then trigger a function to be run?

I would appreciate it if someone could help me out, thanks.

Answer 1

Yes you can do using HttpSessionListener#sessionDestroyed() method.

Create a class that implements HttpSessionListener interface, and add your code inside the method sessionCreated(HttpSessionEvent sessionEvent)

See the links Session Listener Example and Session Listener Example 2

And nevertheless Javadocs are always there

From javadoc:

void sessionDestroyed(HttpSessionEvent se) 
   Receives notification that a session is about to be invalidated.