Servlets, Apache JServ and gcj/libgcj

[Joerg Brunsmann]

Hi,

during compilation and execution of a servlet with gcj/libgcj 
I encountered the following problems: 

1. Get Apache JServ 1.0 from http://java.apache.org

2. Get Java Servlet Development Kit 2.0 from 
   http://java.sun.com/products/servlet/download.html

3. Unpack the jar file which contain the compiled 
   class files for jsdk (lib/jsdk.jar)

4. Remove these classes:

sun/servlet/ServletLoader.class
sun/servlet/http/HackURLConnection.class
sun/servlet/http/HttpServer.class
sun/servlet/http/HttpServerHandler.class

[They need guessContentTypeFrom* from URLConnection which
aren't available yet]
5. Edit org/apache/jserv/JServUtils.java and 

remove the line

  return "ISO-8859-1";

with
  return "8859_1";

This is needed because otherwise you get this error:

[21/11/1999 15:47:06:869] (ERROR) ajp11: Servlet Error: 
java.io.UnsupportedEncodingException: ISO-8859-1 
(java.lang.ClassNotFoundException: gnu.gcj.convert.Output_ISO-8859-1): 
ISO-8859-1 (java.lang.ClassNotFoundException: gnu.gcj.convert.Output_ISO-8859-1)

6. Compile the JServ java files.
7. Copy this servlet into the base dir

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;

public class start extends HttpServlet {

  public void init(ServletConfig config) throws ServletException{ }

  public void doGet(HttpServletRequest req, HttpServletResponse res)
                       throws ServletException, IOException
  {
    res.setContentType("text/html");
    PrintWriter out = res.getWriter();
    out.println("Hello world");
  }
}

8. Download the makefile

  http://www.informatik.fernuni-hagen.de/import/pi3/joerg/makefile

9. Compile

  $ make prepare; make ; make app
  $ ./JServ /usr/local/apache/conf/jserv.properties

Have fun,

Jörg

P.S.: Since I'm a total idiot can someone please explain, why
the libcj ServerSocket implementation complains about

Exception creating the server socket: java.net.BindException: SocketImpl.bind: Error 0

after stopping the JServ servlet engine with Ctrl-C wheras the
same program executed with a java vm starts again without
complaining. Netstat says that the state is TIME_WAIT.