/**
  * Create an instance of the Redis cache driver.
  *
  * @param  array $config
  *
  * @return \Illuminate\Cache\RedisStore|\Illuminate\Cache\FileStore
  */
 protected function createRedisDriver(array $config)
 {
     $redis = $this->app['redis'];
     $connection = \Illuminate\Support\Arr::get($config, 'connection', 'default') ?: 'default';
     $store = new RedisStore($redis, $this->getPrefix($config), $connection);
     try {
         $store->getRedis()->ping();
         return $this->repository($store);
     } catch (Exception $e) {
         event('redis.unavailable', null);
         return parent::createFileDriver(\Config::get('cache.stores.file'));
     }
 }