Get all sessions and manipulate them

[uud ashr]

Hi all,
How to manipulate all existing sessions on wicket.
I can get the SessionData trough getRequestLogger().getLiveSessions(), but I
can't manipulate the SessionData.
For examples, I have session class:

public class MyAppSession extends WebSession {
   ...
   public void setLoggedUser(User user) {
   }

   public User getLoggedUser() {

   }
}


I want to kick all logged users because I want to do something like
maintenance thing by using theSession.setLoggedUser(null) to all available
sessions.
Anyone knows?

Regards,
uudashr