When the jsp contacts the servlet for the first time in a session

[Ravi Kiran Va]

Hi

I am having a jsp page which sends a request to the servlet.

(In a session the jsp page contacts this servlet many times )

Is there any way so that to know that this particular request is the first request from the jsp .

Thank you

[avi sinha]

there are a lot of choices to do it . for example while forwarding use a parameter which can tell the servlet that the request is from the jsp.
based on the parameter you can create a counter.

  in jsp :
<jsp:forward page="url pattern of servlet">
<jsp:param name="caller" value="this jsp page name or something" />
</jsp:forward>  

in servlet:
String condition=request.getParameter("caller");
if(condition.equals("jsp page name") {
// increment session attribute counter or something you want
}

avi sinha>

[Shakeel Shaik]

You can try this approach

First write a listener that implements an HttpSessionListener
Implement the methods sessionCreated and sessionDestroyed, somewhat like this.

public class MySessionListener implements HttpSessionListener {

	public void sessionCreated(HttpSessionEvent event){
		event.getSession().setAttribute("counter","0");
	}

	public void sessionDestroyed(HttpSessionEvent event){
		event.getSession().removeAttribute("counter");
		//you dont have to do this though. 
		//because once the session expires,  counter ceases to exist.
	}
}

In jsp -> <% increment counter %>

In your servlet -> //check counter

hope this helps.
give it a try and let us know how it went.

[Ravi Kiran Va]

First of all . Thank all for you for help .

shaks ss what you said is a complex approach . I would prefer what sinha has mentioned .

[Bear Bibeault]

"shaks ss", please check your private messages for an important administrative matter.