How to maintain session timeout in core java application?

Question

I know there are different mechanism to maintain session in java web application like, in servlet

1. URL rewritting
2. Hidden form fields
3. Cookies
4. HTTP Session

But I don't have any idea how we can maintain any session in core java application (i.e. Standalone application). So can anyone please help me out from finding some of my question,

How to maintain a timeout session for a specific user in standalone application? Please try to give some code for explanation

Answer 1

Check InactivityListener in

http://tips4java.wordpress.com/2008/10/24/application-inactivity/

There are times when you may want to monitor your application for inactivity. Maybe you want to log out a user after a certain time interval. This requirement can be broken down into two main steps. We will need to:

listen for events at the application level track the time interval between these events

Whenever the time interval between events exceeds our inactivity threshhold we will then invoke the inactivity Action.

Answer 2

http://pdf.coreservlets.com/Session-Tracking.pdf

Please refer bove link. In that PDF you will get good example at the end of the book.

By default, session-tracking is based on cookies that are stored in the browser’s memory, not written to disk. Thus, unless the servlet explicitly reads the incoming JSESSIONID cookie, sets the maximum age and path, and sends it back out, quitting the browser results in the session being broken: the client will not be able to access the session again. The problem, however, is that the server does not know that the browser was closed and thus the server has to maintain the session in memory until the inactive interval has been exceeded.

// In Servlet public void doFilter(ServletRequest req, ServletResponse resp, FilterChain filterChain) throws IOException, ServletException { HttpServletResponse httpResp = (HttpServletResponse) resp; HttpServletRequest httpReq = (HttpServletRequest) req; long currTime = System.currentTimeMillis(); long expiryTime = currTime + session.getMaxInactiveInterval() * 1000; Cookie cookie = new Cookie("serverTime", "" + currTime); cookie.setPath("/"); httpResp.addCookie(cookie); if (httpReq.getRemoteUser() != null) { cookie = new Cookie("sessionExpiry", "" + expiryTime); } else { cookie = new Cookie("sessionExpiry", "" + currTime); } cookie.setPath("/"); httpResponse.addCookie(cookie); filterChain.doFilter(req, resp); }