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From "Dustin Callaway" <>
Subject fix...
Date Thu, 20 Jan 2000 04:37:50 GMT
The following class starts the Tomcat HttpServer from within a Java application.
This allows for servlet debugging from within an IDE. Many thanks to Jim Rudnicki for the
sample code (which I just cleaned up and simplified). Place this application in the /tomcat
directory and run it from there.

import org.apache.tomcat.server.HttpServer;

 * SimpleStartup starts the Tomcat HttpServer in a Java
 * application to allow for debugging within an IDE.
public class SimpleStartup
  public static void main(String[] args)
      HttpServer server = new HttpServer(8080, null, null);

      URL url = resolveURL("webpages");

      url = resolveURL("examples");
      server.addContext("/examples", url);

      server.start(); //start the server
    catch (Exception e)
      System.out.println("Error: " + e);

  private static URL resolveURL(String s) throws Exception
    // if the string contains :/, then we assume that it's a real URL and do nothing
    if (s.indexOf(":/") > -1)
        return new URL(s);

    // otherwise, we assume that we've got a file name and
    // need to construct a file url appropriatly.
    if (s.startsWith("/"))
      return new URL("file", null, s);
      String pwd = System.getProperty("user.dir");
      return new URL("file", null, pwd + "/" + s);

That's it. Register your servlet in the web.xml file, set a breakpoint in your servlet using
an IDE (JBuilder, Visual Cafe, etc.), and invoke the servlet from a browser (execution should
stop at your breakpoint). Thanks for the tip, Jim!

Dustin Callaway

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