Scut：Redis 资源管理器

        private static ICacheSerializer _serializer;     //redis 存储内容的序列化器
        private static RedisPoolSetting _setting;        //redus 他、应遵循的配置
        private static ConcurrentDictionary<string, ObjectPoolWithExpire<RedisClient>> _poolCache;   //字典结构：每个 key 对应一个 pool 的集合   
        private static RedisInfo _currRedisInfo;

        public static void Initialize(RedisPoolSetting setting, ICacheSerializer serializer)
        {
            _setting = setting;         //RedisPoolSetting 按默认配置加载的配置
            _serializer = serializer;   //采取的序列化器
            //init pool
            string key = GenratePoolKey(setting.Host, setting.DbIndex);     //127.0.0.1:6379#0 是首个管理 redisclient-pool 的 key
            var pool = GenrateObjectPool(setting);                          //建立对象池,主要是为泛型类注入 factory 方法，以及池深度、对象生命周期参数

        private static ObjectPoolWithExpire<RedisClient> GenrateObjectPool(RedisPoolSetting setting)
        {
            return new ObjectPoolWithExpire<RedisClient>(() => CreateRedisClient(setting), true, setting.PoolTimeOut, setting.MaxWritePoolSize / 10);   
        }

            for (int i = 0; i < pool.MinPoolSize; i++)      
            {
                pool.Put();
            }
            _poolCache[key] = pool;
            InitRedisInfo();　　
        }

        public static RedisClient GetClient()
        {
             return GetOrAddPool(_setting);

        public static RedisClient GetOrAddPool(RedisPoolSetting setting)
        {
            var key = GenratePoolKey(setting.Host, setting.DbIndex);
            var lazy = new Lazy<ObjectPoolWithExpire<RedisClient>>(() => GenrateObjectPool(setting));　　//根据配置找到pool的key，使用key检索到pool
            ObjectPoolWithExpire<RedisClient> pool = _poolCache.GetOrAdd(key, k => lazy.Value);          //在目标pool 获取一个 redisclient
            return pool.Get();
        }

        }

        public static object[] GetAllEntity(string personalId, params  Type[] entityTypes)
        {
            //todo: trace GetAllEntity
            var watch = RunTimeWatch.StartNew("Get redis data of persionalId:" + personalId);
            if (entityTypes.Length == 0) return null;

            byte[] keytBytes = ToByteKey(personalId);　　//将私有ID转化成二进制流
            var redisKeys = new List<string>();
            foreach (var type in entityTypes)           //遍历所有要获取数据的类型
            {
                redisKeys.Add(GetRedisEntityKeyName(type));
            }
            try
            {
                byte[][] valueBytes = null;
                ProcessReadOnly(client =>
                {
                    var values = new List<byte[]>();
                    using (var p = client.CreatePipeline())
                    {
                        foreach (var key in redisKeys)　　//使用redis管道，一次性执行多条读取命令
                        {
                            string k = key;
                            p.QueueCommand(cli => ((RedisNativeClient)cli).HGet(k, keytBytes), values.Add);　　//将类型与私有ID组合成rediskey，将值获取到value中
                        }
                        p.Flush();
                    }
                    valueBytes = values.ToArray();　　
                    //valueBytes = client.Eval(script, redisKeys.Count, redisKeys.ToArray());
                });
                watch.Check("redis get");
                if (valueBytes != null)
                {
                    var result = new object[entityTypes.Length];
                    for (int i = 0; i < entityTypes.Length; i++)　　//遍历每个类型，将二进制流反序列化成对象
                    {
                        var type = entityTypes[i];
                        var val = i < valueBytes.Length ? valueBytes[i] : null;
                        result[i] = val == null || val.Length == 0
                            ? null
                            : _serializer.Deserialize(val, type);
                    }
                    return result;　　//得到对象数组后返回，从应用层来看，该API可用于一次性获取一个personalkey的多种多类型数据
                }
            }
            catch (Exception ex)
            {
                TraceLog.WriteError("Get redis data of persionalId:{0} error:{1}", personalId, ex);
            }
            finally
            {
                watch.Flush(true, 200);
            }
            return null;
        }

　　　　 //该API的命名是更新，更新则包含写入与删除两个操作
　　　　 private static void TransUpdateEntity(IRedisTransaction trans, string hashId, byte[][] keys, byte[][] values, byte[][] removeKeys)
        {
            if (keys.Length > 0)
            {
                trans.QueueCommand(c =>
                {
                    var cli = (RedisClient)c;
                    cli.HMSet(hashId, keys, values);　　
                });
            }
            if (removeKeys.Length > 0)
            {
                trans.QueueCommand(c =>
                {
                    var cli = (RedisClient)c;
                    cli.HDel(hashId, removeKeys);
                });
            }
        }