Using Spring MVC 3.1+ WebApplicationInitializer to programmatically configure session-config and error-page

Question

WebApplicationInitializer provides a way to programmatically represent a good portion of a standard web.xml file - the servlets, filters, listeners.

However I have

Answer 1

Actually WebApplicationInitializer doesn't provide it directly. But there is a way to set sessointimeout with java configuration.

You have to create a HttpSessionListner first :

import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;

public class SessionListener implements HttpSessionListener {

    @Override
    public void sessionCreated(HttpSessionEvent se) {
        //here session will be invalidated by container within 30 mins 
        //if there isn't any activity by user
        se.getSession().setMaxInactiveInterval(1800);
    }

    @Override
    public void sessionDestroyed(HttpSessionEvent se) {
        System.out.println("Session destroyed");
    }
}

After this just register this listener with your servlet context which will be available in WebApplicationInitializer under method onStartup

servletContext.addListener(SessionListener.class);