private function buildMemcachedCache()
 {
     if (null === $this->host) {
         throw new HostShouldBeProvidedException();
     }
     if (null === $this->port) {
         $this->port = Memcached::DEFAULT_PORT;
     }
     $this->server->addserver($this->host, $this->port);
     $this->cacheProvider->setMemcached($this->server);
 }