Only one object saved in ServletContext

[Nobpn]

Helle all.

Sorry for my bad english : i'm french

Briefly : when two users use my application, only the last one is saved in ServletContext.

NB: I use ServletContextAware due to the null pointer exception return by this.getThreadLocalRequest().getSession(). After a long search on web someone tells to use ServletContextAware. I also try to set the session using this method. The result is exactly the same !

I explain my architecture :

• I use hibernate + spring for my core library.
• I use GWT + spring for my web app.

Users enters the apps by a login form. This form call a rpc service which checks user in database. If user is valid => user saved in session.

Here is my rpc implementation :

public class SessionServiceImpl extends RemoteServiceServlet 
     implements SessionService, ServletContextAware {

    private ServletContext servletContext;
    
    @Override
    public UserProperties checkLogin(UserProperties userToCheck){

        UserProperties user = serv.isValidUser(userToCheck);

        if (user != null) {
            servletContext.setAttribute("USER", user);
        }
        return user;
    }

    @Override
    public UserProperties isSessionAlive() {
        UserProperties bean = (UserProperties) servletContext.getAttribute("USER");
        if ((bean != null) && (bean.getLogin().length() != 0)) {
            return bean;
        }
        return null;
    }
}

I test with two diffrents browser Firefox (FF) and Chrome (CH).

1. FF log with user1
2. FF check session -> user1 is logged
3. CH log with user2
4. CH check session -> user2 is logged
5. FF check session : user2 is logged

Can my problem come from web.xml?

Many thanks for reading !

Pierre

[MartyJones]

You should be storing the user on the HttpSession and NOT the ServletContext. The ServletContext is typically a single instance per Servlet container. This explains why when the second user logs in it stomps on the first user's user reference.