This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Hi Bharat, HttpSessionBindingListener is an interface specifically used for session management. If u want to know when the session is binded and unbinded, then u have to implement a class with this interface and use it in your servlet. This interface has two methods 1) valueBound 2) valueUnBound Implementing this two methods, u can do some useful work like whenever a session is binded, u can load the user related file in to memory and perform some actions on it, and when ever the session ends you can save the data back. I hope u find this info useful. bye. Loke
Not entirely accurate HttpSessionBindingListener is not so much about session lifetime as about the lifetime of session-scoped objects. You can implement the HttpSessionBindingListener in any object you want to bind in the session. If you do, your object will be alerted when it is bound to a session, and when it is unbound for whatever reason (session expiration or a removeAttribute call). This is useful if the object needs to do some initialisation or clean-up, such as managing external resources or the co-ordinated (un)binding of related session scoped objects. - Peter