public static function startFtpServer()
 {
     // Arguments to server process
     $args = array('debugServerProtocolToFile' => NULL);
     // Start server process
     self::$serverProcess = Runtime::getInstance()->newInstance(NULL, 'class', 'net.xp_framework.unittest.peer.ftp.TestingServer', array_values($args));
     self::$serverProcess->in->close();
     // Check if startup succeeded
     $status = self::$serverProcess->out->readLine();
     if (1 != sscanf($status, '+ Service %[0-9.:]', self::$bindAddress)) {
         try {
             self::shutdownFtpServer();
         } catch (IllegalStateException $e) {
             $status .= $e->getMessage();
         }
         throw new PrerequisitesNotMetError('Cannot start FTP server: ' . $status, NULL);
     }
 }