how to set or get value from cache in symfony2.8? :  in my service.yml

     cache:
        class: Doctrine\Common\Cache\PhpFileCache
        arguments: [%kernel.cache_dir%] 
 
////////////////////

and in my controller 

   $cache = $this->get('cache');

   if ($cache->fetch($cache_key) != NULL) {

  ///mycode

   }

///////////////

my SilencedError is 

1-include(\app\cache\dev\30\446f637472696e654e616d65737061636543616368654b65795b5d.doctrinecache.php): failed to open stream: No such file or directory 
