/// <summary>
        /// 删除文件夹
        /// </summary>
        public void Delete()
        {
            var db = RedisConnectionFactory.GetDatabase();

            foreach (var endpoint in RedisConnectionFactory.GetEndPoints())
            {
                var server = RedisConnectionFactory.GetServer(endpoint);
                foreach (var key in server.Keys())
                {
                    if (key.ToString().StartsWith(RedisFileEntry.FileKeyPrefix + FullPath + "/"))
                    {
                        db.KeyDelete(key);
                    }
                }
            }
        }
        /// <summary>
        /// 删除所有缓存值
        /// </summary>
        public void Clear()
        {
            var db = RedisConnectionFactory.GetDatabase();

            foreach (var endpoint in RedisConnectionFactory.GetEndPoints())
            {
                var server = RedisConnectionFactory.GetServer(endpoint);
                foreach (var key in server.Keys())
                {
                    if (key.ToString().StartsWith(UniquePrefix))
                    {
                        db.KeyDelete(key);
                    }
                }
            }
            FallbackCache.Clear();
        }
        /// <summary>
        /// 获取缓存对象数量
        /// </summary>
        public int Count()
        {
            int count = 0;

            foreach (var endpoint in RedisConnectionFactory.GetEndPoints())
            {
                var server = RedisConnectionFactory.GetServer(endpoint);
                foreach (var key in server.Keys())
                {
                    if (key.ToString().StartsWith(UniquePrefix))
                    {
                        count += 1;
                    }
                }
            }
            count += FallbackCache.Count();
            return(count);
        }
        /// <summary>
        /// 枚举文件
        /// </summary>
        public IEnumerable <IFileEntry> EnumerateFiles()
        {
            var db = RedisConnectionFactory.GetDatabase();

            foreach (var endpoint in RedisConnectionFactory.GetEndPoints())
            {
                var server = RedisConnectionFactory.GetServer(endpoint);
                foreach (var key in server.Keys())
                {
                    var keyStr = key.ToString();
                    if (keyStr.StartsWith(RedisFileEntry.FileKeyPrefix + FullPath + "/"))
                    {
                        var path           = keyStr.Substring(RedisFileEntry.FileKeyPrefix.Length);
                        var childPathParts = path.Substring(FullPath.Length + 1).Split('/');
                        if (childPathParts.Length == 1)
                        {
                            yield return(new RedisFileEntry(RedisConnectionFactory, path, false));
                        }
                    }
                }
            }
        }