Dynamically discover the GWT URL instead of using the Enunciate deployment address

/**
   * Utility class for getting an instance of the async interface for WelcomeService.
   */
  public static class Util {

    /**
     * Get an instance of this async interface for WelcomeService. This method assumes the endpoint is
     * mounted at "http://localhost:8080/GWTpubSub/gwt/welcome".
     *
     * @return The async instance.
     */
    public static WelcomeServiceAsync getInstance() {
      return getInstance("http://localhost:8080/GWTpubSub/gwt/welcome");
    }

    /**
     * Get an instance of this async interface for WelcomeService.

     *
     * @param url The url where the remote endpoint is mounted.
     * @return The async instance.
     */
    public static WelcomeServiceAsync getInstance(String url) {
      WelcomeServiceAsync asyncInstance = (WelcomeServiceAsync) com.google.gwt.core.client.GWT.create(WelcomeService.class);

      ((com.google.gwt.user.client.rpc.ServiceDefTarget) asyncInstance).setServiceEntryPoint(url);
      return asyncInstance;
    }
  }

/**
   * Utility class for getting an instance of the async interface for WelcomeService.
   */
  public static class Util {

    /**
     * Get an instance of this async interface for WelcomeService. This method assumes the endpoint is
     * mounted at "http://localhost:8080/GWTpubSub/gwt/welcome".
     *
     * @return The async instance.
     */
    public static WelcomeServiceAsync getInstance() {
        /*
        ** Get URL for module
        */
        String url = com.google.gwt.core.client.GWT.getModuleBaseURL();
        /*
        ** Split off first part including server and port
        */
        String urlSplit[] = url.split("http://\\w+:\\d+/");
       /*
       ** Construct end point
       */
       return getInstance(urlSplit[0]+"/GWTpubSub/gwt/welcome");
    }

    /**
     * Get an instance of this async interface for WelcomeService.

     *
     * @param url The url where the remote endpoint is mounted.
     * @return The async instance.
     */
    public static WelcomeServiceAsync getInstance(String url) {
      WelcomeServiceAsync asyncInstance = (WelcomeServiceAsync) com.google.gwt.core.client.GWT.create(WelcomeService.class);

      ((com.google.gwt.user.client.rpc.ServiceDefTarget) asyncInstance).setServiceEntryPoint(url);
      return asyncInstance;
    }
  }