OffTopic : Authentication Mechanism

[Asadullah Khan]

Hi all,         I am planning an Authentication Framework mechanism for my Servlets, JSPs and EJBs.   When ever a user access any of the resources, he has to be authenticated and checked for access roles.   That is I want to implement some sort of server side authentication mechanism.   The software developed will be integrated with the webserver or the application server.   can anybody give some insights, on how possibly can i go ahead and implement the same.     regards   Asad