Session issue

Here it is.

import login.LoginController;
 
import java.sql.Timestamp;
 
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;
 
public class HttpSessionController implements HttpSessionListener{
 
	
	public void sessionCreated(HttpSessionEvent argument1) {
		System.out.println("Timestamp " + new Timestamp(System.currentTimeMillis()));
		argument1.getSession().setMaxInactiveInterval(1800);
		
	}
 
	public void sessionDestroyed(HttpSessionEvent argument2) {
		System.out.println("Timestamp destroyed " + new Timestamp(System.currentTimeMillis()));
		LoginController.logUserOut(argument2);
	}
 
	
}

                                              

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request.getSession().setMaxInactiveInterval(1800);

-- add the above line to the PingSession Servlet  doPost method. Since u have set the session timeout programatically it doesn't extend the session on hit to servlet.

try this.

-Murali*

Also there are differences between <session-timeout> setting in web.xml and using setMaxInterval().

A session which has setMaxInterval() would automatically get expired after the time specified, whereas for those session that doesn't have setMaxInterval() it looks for default <session-timeout> application setting in web.xml and based on that it expires.

I hope in your case since setMaxInterval() is set it doesn't have an idea of what value to reset the session.
Alternatively u can remove the setMaxInterval() from ur HttpSessionListener & ur Pingsession servlet(if u added that setMaxInterval()) and configure it in web.xml and then give it a try then it should work like a gem.

-Murali*

Great information Murali. That is why when i added sesison-timeout it had no effect because the Listener was still getting invoked. I have added the maxInterval time in my PingSession also. Hopefully this will resolve the issue. I will update in a little bit.

I tried adding setMaxInterval in my Ping Servlet but unfortunately the result is the same. It does not extend the session. I don't know what the main reason is. I am trying one more trick to see if that will help. if not then i will remove the listener from web.xml and will configure the session-timeout in web.xml which will be set to 30 min and then i will see if that will work or not. Thanks for your help. I will update later on.

I removed the listener and added this in web.xml :-

<session-config>
<session-timeout>30</session-timeout>
</session-config>

Hope this works.

Same thing murali. With session-timeout or without session-timeout.

that stumped me all together. Fine, are you using Spring WebMVC and its controller  for ur page request?
If yes can u try pointing the .js to the controller and handle the session handling code there instead of a seperate servlet?

since u already have a parameter pageKey=extendSession, you can add the following (if) in the controller and then copy the rest of the session extending code.

if("extendSession".equalsIgnoreCase(request.getParameter("pageKey"))){
//create xml and flush it.
}

I have the same set of code , running on a Tomcat server and its working perfectly. What server do you use?.

-Murali*

I used Sun one web server. In the meantime i read about XMLHttprequest and the JS function is working properly. Session will always be renewed when you hit a server doPost() method. however, In my case who knows what might be wrong and why it is not renewing the session.

Our login page is a servlet where as the page which is long is a controller. I am still trying to see why
<session-config>
<session-timeout>30</sessio-timeout>
</session-config>
is not working.

<session-timeout>30</sessio-timeout> -- is it a typo on ur web.xml or on post.

I m trying to figure out what might have gone wrong..will let u know

Thanks for your help murali. Yes that is a typo. I read AJAX On java book and the book offers some examples in how to send request to the server asynchronously through XMlHttpRequest. It's pretty much the same thing you posted.

@Micheal:

Any luck?.  I just gone through different sites but couldnt find something useful for this issue.
Just a wierd one was check if u use acegi.jar (try replacing with the latest one).

I would suggest a workaround for this problem,

Instead of servlet (PingSession) you pass the control to one of the Spring Controllers (dummy) probably which is empty and doesn't do anything (dont  frwd to any target page).

Give it a try...

-Murali*

Just curious murali. So now as i understand you i will create a simple controller using spring framework. I can probably use handlerequestInternal method of the controller to do exactly what i was doing in PingSession servlet. I will do :-

String param = request.getParameter("pageKey");
If pageKey is extendSession then
do all the XML stuff what i did in my servlet.

My only question is that what do i need to do over here ? :-

req.onreadystatechange = getReadyStateHandler(req, updateSessionInfo);
  req.open("POST", "/servlet/PingSession", true);

As the controller is suppose to be defined in applicationContext if you want to make it available in the application. Thank you for all your help man in solving this wiered issue. I can't find anything in the code itself to see why is it not extending the session :(

And yea we are not using any acegi security in our application.

 req.open("POST", "/servlet/PingSession", true);
>> you need to change the servlet call to your spring controller call. Just like how you do it in ur jsp page.
I don't have any code samples as of now, just give a try.

I tried to use the same controller. When i added this :-

req.open("POST","/jsp/addUser.jsp",true);

I get an error stating :-

"Neither bindingresult nor command object user is available as request". I know this is the most common error in spring but how can i get rid of it ?. I put the xml code in refrenceData as refrenceData is always called when a page refreshes as per spring documentation. I think my problem is the frames.

hmm . Creating a Controller in spring and then calling the JSP and resetting the session time in the controller through AJax have done the trick for me :).
I can stay on the same page as long as i want to now :--). However, i have only one question murali.  This function :-

function updateSessionInfo(sessionXML){
          var session = sessionXML.getElementsByTagName("session")[0];
          var userid = session.getAttribute("userid");    
          if(userid == 'null' || userid == null){
                  msgToUser();
          }
}

When i try to put alert statement i get 'null or no object' in this method. I putted aler(session) and i got null over there also. The code does send the request to my controller but since it is a MVC and i am using just a simpleformcontroller i don't know what to return ?

return new ModelAndView(getSuccessView());

I believe this is my problem that is why i am not getting anything in the response in AJAX. Any tips ?

Let me see if i can make it work.

Hmm. Well that is true also i do'nt want to show anything to the user in the alert statement except for just that pop up message. However if i just leave it like the way it is everything works fine also but i get a Javascript error. I am trying to see what can i remove from the ajax code so that the JS error is not shown to the user in the task bar,