Howto free resources when servlet reaches timeout?

Question

Hi there!
I have written a small servlet which is mainly used to communicate via different types of clients using http.
SoI only use the servlet as a "http-receiver", behind there works a complex buissnes logic withought any servlet/jsp/j2ee-stuff.
I know these are basic questions but till now I did not find any answer to the following questions:
1.) How can I change the session-timout?
2.) How can I release resources (db-connections, ....) after session timeout exceeded?
Maybe you know a servlet-tutorial which covers questions like the quests above, such a tut would help a lot ;-)
Thanks a lot, lg Clemens

Answer 1

1) you can set the session timout either in code with session.setMaxInactiveInterval(), or in the web.xml with the <session-timeout> element.
2) The HttpSessionBindingListener interface has a method called valueUnbound() that gets called when the session expires. You can use that method to release resources. Define a timeout notifier class implementing the HttpSessionBindingListener interface. Create an object of that new class and add it to the session. When the session times out, your notifier's valueUnbound() will be called .
Don't forget to add you notifier class in the listener tag of the web.xml :
<listener>
  <listener-class>package.notifierClass</listener-class>
</listener>As for some doc, this one should do it.