Issue getting Context inside a servlet

[Robin Curts]

What I am trying to accomplish:
I'm trying to build a servlet that I can get the DocBase with, so I'm 
trying to locate org.apache.catalina.Context from the servlet.

Tomcat Version: 5.0.28
Java Version: 1.4.2_05
What I'm doing:
I am implementing ContainerServlet and this works great when I run the 
servlet through a web application defined in 
$catalina.home/servers/webapps/<my_webapp>.  Pretty much in the same 
place as the manager servlet.  However when I run it as an installed WAR 
file I am getting a nasty null pointer exception (running from 
$catalina.home/webapps/<my_webapp>).

The issue:
setWrapper() is never getting called when I have this inside the 
$catalina.home/webapps/ directory tree... only when I have it in 
$catalina.home/server/ directory tree.  Any thoughts on this?  When this 
webapp goes live it will be installed as a WAR file and I won't be able 
to control what directory it is in.  Any thoughts?

Here is my servlet, pretty basic, just trying to find the Context and 
DocBase:
//-- SERVLET START --
import org.apache.catalina.*;
import javax.servlet.http.*;
import javax.servlet.*;
import java.util.*;
import java.io.*;

public class Ctx extends HttpServlet implements ContainerServlet {
   Context context;
   Deployer deployer;
   Wrapper wrapper;
  
   public Ctx() {
       context = null;
       deployer = null;
       wrapper = null;
   }
  
   public Wrapper getWrapper() {
       return wrapper;
   }
  
   public void setWrapper(Wrapper wrapper) {
       this.wrapper = wrapper;
       try {
           context = (Context)wrapper.getParent();
           deployer = (Deployer)context.getParent();
       } catch (NullPointerException e) {
           context = null;
           deployer = null;
       }
   }
  
   public void destroy() {
       // do nothing   
   }
  
   public void init() {
       // do nothing
   }
  
   public void doPost(HttpServletRequest request, HttpServletResponse 
response)
   throws IOException, ServletException {
       doGet(request, response);   
   }
   public void doGet(HttpServletRequest request, HttpServletResponse 
response)
   throws IOException, ServletException {
       PrintWriter out = response.getWriter();
       response.setContentType("text/plain");
       out.println("My Context Object: " + context);
       out.println("Doc Base: " + context.getDocBase());
       out.flush();
       out.close();
   }
}
//-- SERVLET END --

--
/**
* Robin Curts
* [EMAIL PROTECTED]
* http://www.robincurts.com
* (813) 786-8634
*/
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