/**
  * Retrieve entry by url
  *
  * @param string $url
  *
  * @throws NotFoundHttpException
  * @return boolean
  */
 protected function getEntry($url)
 {
     $this->entry = $this->entryRepository->findOneByUrl($url);
     if (!is_object($this->entry)) {
         throw new NotFoundHttpException();
     }
     return true;
 }