count active users

Question

I'm using spring security 2.

1.may i know how to use securitycontextholder to get total number of active users?
2. can retrieve sessionregistry from securitycontextholder?

Answer 1

extend AuthenticationProcessingFilter

override

@Override
    protected void onSuccessfulAuthentication(HttpServletRequest request,
            HttpServletResponse response, Authentication authResult)
            throws IOException {  

and here you can do the things you want to do by keeping a application variable .

Answer 2

I do not know how to do with spring. But in servlets you need to implement a HttpSession Listener interface for a listener class . The interface has two methods namely sessionCreated() and sessionDestroyed() . Whenever a new session is created you can increment the static variable in the method sessionCreated.