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import java.util.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class MyServlet extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
res.setContentType("text/plain");
PrintWriter out = res.getWriter();
// Get the current session object, create one if necessary
HttpSession session = req.getSession();
// Add a CustomBindingListener
session.setAttribute("bindings.listener",
new CustomBindingListener(getServletContext()));
out.println("This page intentionally left blank");
}
}
class CustomBindingListener implements HttpSessionBindingListener {
// Save a ServletContext to be used for its log() method
ServletContext context;
public CustomBindingListener(ServletContext context) {
this.context = context;
}
public void valueBound(HttpSessionBindingEvent event) {
context.log("[" + new Date() + "] BOUND as " + event.getName() +
" to " + event.getSession().getId());
}
public void valueUnbound(HttpSessionBindingEvent event) {
context.log("[" + new Date() + "] UNBOUND as " + event.getName() +
" from " + event.getSession().getId());
}
}
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Download: ServletCustomSessionBindingListener.zip( 89 k)