/**
  * This method returns the URL of the specified service on the specified
  * host.
  *
  * @param service
  *            The name of the service.
  * @param protocol
  *            The service protocol
  * @param host
  *            The service host name
  * @param port
  *            The service listening port
  * @return The URL of the specified service on the specified host.
  */
 public static function getServiceURL($service, $protocol, $host, $port)
 {
     $validate = WebtopNaming::isServerMode();
     return WebtopNaming::getServiceURLAndValidate($service, $protocol, $host, $port, $validate);
 }