static private ClientExecutor createAuthenticatingExecutor(DefaultHttpClient client)
   {
      // Create AuthCache instance
      AuthCache authCache = new BasicAuthCache();
      
      // Generate BASIC scheme object and add it to the local auth cache
      BasicScheme basicAuth = new BasicScheme();
      HttpHost targetHost = new HttpHost("localhost", 8081);
      authCache.put(targetHost, basicAuth);

      // Add AuthCache to the execution context
      BasicHttpContext localContext = new BasicHttpContext();
      localContext.setAttribute(ClientContext.AUTH_CACHE, authCache);
      
      // Create ClientExecutor.
      ApacheHttpClient4Executor executor = new ApacheHttpClient4Executor(client, localContext);
      return executor;
   }