HttpSessionBindingListener

hi,
say i have session attribute called "test". which is an object that implements HttpSessionBindingListener interface.
i've done ,
MyTest test1 = new MyTest("test1");
session.setAttribute("test",test1);
MyTest test2 = new MyTest("test2");
sesssion.setAttribute("test",test2);
so, what happens when setting attributes at both points?
i believe that test1 is notified when first time the attribute is set to be test1. now, when i reset the attribute with object test2, test2 is notified of the binding and test1 object is notified of unbinding event. is that right?
regards
maulin.
PS: i don't have access to servlet env where i can test stuff otherwise i'd tested this.
(i should put this PS in my signature as i wont have much access to servlet env and so this will apply to my every message

)

I would say yes.

import javax.servlet.http.*;
import javax.servlet.*;
import java.io.*;
public class TestHttpSessionBindingListener extends HttpServlet {

public void doGet(HttpServletRequest request,HttpServletResponse response)
throws ServletException, IOException {

HttpSession session = request.getSession(true); 
CountObject countObject = new CountObject();
session.setAttribute("countObject", countObject);
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println(countObject);
}
}

---
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionBindingListener;
public class CountObject implements HttpSessionBindingListener {

public static String msg="";
public static int counter;
private String name;

public CountObject () {
counter++;
name = "counterObject" + counter;
}

public void valueBound(HttpSessionBindingEvent arg0) {
msg = msg + name + " says: " + name + " bound to session<br>";

}
public void valueUnbound(HttpSessionBindingEvent arg0) {
msg = msg + name + " says: " + name + " unbound to session<br>";
}

public String toString() {
return msg;
}
}

---
results in:

if you call servlet and press refresh button 2 times.
(if anybody wants to test: put both files in webapps\yourApp\WEB-INF\classes)
Axel
[ February 24, 2002: Message edited by: Axel Janssen ]

Good one, Axel.

I have the same result, with my code also, thought I will post it but your version is much better.
Bound.
Unbound.
Bound.
Thats the sequence......
- satya

thanks axel!
regards
maulin.