getContext() returning null

[Nikhil Sagar]

Here is My code..

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class MyServlet extends HttpServlet
{
	public void service(HttpServletRequest req,HttpServletResponse res) throws ServletException,IOException
	{
		res.setContentType("text/html");
		PrintWriter out=res.getWriter();
		
		ServletContext ctx=getServletContext();
		ServletContext otherCtx=ctx.getContext("http://localhost:8090/first_app");
		System.out.println("ctx= "+ctx);
		System.out.println("otherCtx= "+otherCtx);
		RequestDispatcher disp=otherCtx.getRequestDispatcher("/my");
		disp.include(req,res);
		out.println("THIS IS A MESSAGE IN MY SERVLET");
	}
}

here on this line....

RequestDispatcher disp=otherCtx.getRequestDispatcher("/my");

i am getting NullPointerException
first_app is deployed and running and working fine.
I am a newbie to serblets so please explain your answer properly.
Thanks in advance.

[Anirudh Srivastav]

Nikhil,

Hope this helps you!

http://www.coderanch.com/t/359528/Servlets/java/ServletContext-getContext-method

[Seetharaman Venkatasamy]

otherCtx is null?

did you tune crossContext attribute in Context xml?
*Note:Some of the server may not support this function.

[Ning Si Liu]

Anirudh's link is good.
Sorry,I'm new here.I just want a post to test my account.

[Seetharaman Venkatasamy]

Welcome to JavaRanch Ning Si Liu !

[Ning Si Liu]

Seetharaman Venkatasamy wrote:Welcome to JavaRanch Ning Si Liu !

Thanks so much.I didn't plan to be gotten noticed.

[Nikhil Sagar]

Seetharaman Venkatasamy wrote:otherCtx is null?

did you tune crossContext attribute in Context xml?
*Note:Some of the server may not support this function.

Unable to locate Context xml please tell me where is it??
i am using GlassFish Server Open Source Edition 3.1.2 (build 23)

[Anirudh Srivastav]

I guess you would have figured it out by yourself in case haven't here is a piece of info which would help you.

There is property named crossContextAllowed which is equivalent to crossContext of tomcat. It should be available in your web application's web app xml. You may refer your server user guide to know the exact syntax.

Hope this helps.

Regards

[Anirudh Srivastav]

Ning,

You are welcome. Enjoy your Java Ranch journey !!