DB|Redis快速入手,NET起跑

DB|Redis快速入手,NET起跑_第1张图片
image

Redis可以完美实现高速缓存的功能,同时也具备了数据库的所有技能(Redis称之为数据持久化)。前者可以秒掉memcached,后者原则上可以替代传统数据库,但鉴于Mysql,SQL Server,Oracle等关系型数据库所占领的领地非常广泛,处理的问题相当复杂,Redis要完全取而代之,尚需时日。事实上,任何一种技术都无法独步天下,我们只是择其善者而用之。

可以肯定的是,Redis在数据缓存和存储方面确实有着不可比拟的优势,在传统数据库难顾首位的应用场景里,Redis大放异彩。

1)热点数据(缓存)
热点数据(经常会被查询,但极少变更的数据),大量密集的访问对速度和定位都由着较高的要求,QPS和极强的稳定性成为reidis的必杀技。

2)计数器
传统DB在处理并发访问时,可能存在脏读的情况,Redis采用单线程,可以避免并发问题,同时保证100%毫秒级性能。

3)队列

4)位操作

5)分布式锁与单线程机制

关于队列和计数等操作,已在文末提供的工具类中加以封装,可以直接取用。

1.下载

官方网站 https://redis.io/
官方网站(中) http://www.redis.cn/
入门文档 http://www.runoob.com/redis/redis-tutorial.html
DB|Redis快速入手,NET起跑_第2张图片
image

建议去github下载 https://github.com/MicrosoftArchive/redis/releases

安装过程非常简单,下载解压缩后,命令行定位到相应目录执行命令就可以了,github很贴心地打了包,也可以直接执行他们的安装程序。

安装成功的界面如下:

DB|Redis快速入手,NET起跑_第3张图片
image

2.配置

由于我此前已经安装过,所以显示端口被占用了。


DB|Redis快速入手,NET起跑_第4张图片
image

关于数据库的默认端口,记住这个就可以了。


image.png

密码设置 config set requirepass test123

用过MySQL的同学是不是感到很亲切,熟悉的套路熟悉的感觉,没错,和MySQL一样,Redis也有较为成熟的管理工具,我选择了redisdesktop,下载地址 https://redisdesktop.com/,界面非常友好。

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redisdesktop连接界面
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redisdesktop管理界面

更多设置可以参考 http://www.runoob.com/redis/redis-install.html

3.测试

DB|Redis快速入手,NET起跑_第7张图片
key-value设置及读取

4.工具及API

Redis非常良心的一点是提供了丰富而强大的api支持,作为C#从业人员,本次分享C#的两个工具类,需要的话可以直接取用。工具类依赖于StackExchange.Redis包,请使用nuget自行安装。

RedisConnectionHelp .cs

using StackExchange.Redis;
using System;
using System.Collections.Concurrent;
using System.Configuration;


namespace RedisHelper
{
    /// 
    /// ConnectionMultiplexer对象管理帮助类
    /// 
    public static class RedisConnectionHelp
    {
        //系统自定义Key前缀
        public static readonly string SysCustomKey = ConfigurationManager.AppSettings["RedisKey"] ?? "";

        //"127.0.0.1:6379,allowadmin=true
        private static readonly string RedisConnectionString = ConfigurationManager.AppSettings["RedisExchangeHosts"];

        private static readonly object Locker = new object();
        private static ConnectionMultiplexer _instance;
        private static readonly ConcurrentDictionary ConnectionCache = new ConcurrentDictionary();

        /// 
        /// 单例获取
        /// 
        public static ConnectionMultiplexer Instance
        {
            get
            {
                if (_instance == null)
                {
                    lock (Locker)
                    {
                        if (_instance == null || !_instance.IsConnected)
                        {
                            _instance = GetManager();
                        }
                    }
                }
                return _instance;
            }
        }

        /// 
        /// 缓存获取
        /// 
        /// 
        /// 
        public static ConnectionMultiplexer GetConnectionMultiplexer(string connectionString)
        {
            if (!ConnectionCache.ContainsKey(connectionString))
            {
                ConnectionCache[connectionString] = GetManager(connectionString);
            }
            return ConnectionCache[connectionString];
        }

        private static ConnectionMultiplexer GetManager(string connectionString = null)
        {
            connectionString = connectionString ?? RedisConnectionString;
            var connect = ConnectionMultiplexer.Connect(connectionString);

            //注册如下事件
            connect.ConnectionFailed += MuxerConnectionFailed;
            connect.ConnectionRestored += MuxerConnectionRestored;
            connect.ErrorMessage += MuxerErrorMessage;
            connect.ConfigurationChanged += MuxerConfigurationChanged;
            connect.HashSlotMoved += MuxerHashSlotMoved;
            connect.InternalError += MuxerInternalError;

            return connect;
        }

        #region 事件

        /// 
        /// 配置更改时
        /// 
        /// 
        /// 
        private static void MuxerConfigurationChanged(object sender, EndPointEventArgs e)
        {
            Console.WriteLine("Configuration changed: " + e.EndPoint);
        }

        /// 
        /// 发生错误时
        /// 
        /// 
        /// 
        private static void MuxerErrorMessage(object sender, RedisErrorEventArgs e)
        {
            Console.WriteLine("ErrorMessage: " + e.Message);
        }

        /// 
        /// 重新建立连接之前的错误
        /// 
        /// 
        /// 
        private static void MuxerConnectionRestored(object sender, ConnectionFailedEventArgs e)
        {
            Console.WriteLine("ConnectionRestored: " + e.EndPoint);
        }

        /// 
        /// 连接失败 , 如果重新连接成功你将不会收到这个通知
        /// 
        /// 
        /// 
        private static void MuxerConnectionFailed(object sender, ConnectionFailedEventArgs e)
        {
            Console.WriteLine("重新连接:Endpoint failed: " + e.EndPoint + ", " + e.FailureType + (e.Exception == null ? "" : (", " + e.Exception.Message)));
        }

        /// 
        /// 更改集群
        /// 
        /// 
        /// 
        private static void MuxerHashSlotMoved(object sender, HashSlotMovedEventArgs e)
        {
            Console.WriteLine("HashSlotMoved:NewEndPoint" + e.NewEndPoint + ", OldEndPoint" + e.OldEndPoint);
        }

        /// 
        /// redis类库错误
        /// 
        /// 
        /// 
        private static void MuxerInternalError(object sender, InternalErrorEventArgs e)
        {
            Console.WriteLine("InternalError:Message" + e.Exception.Message);
        }

        #endregion 事件
    }
}

RedisHelper .cs


using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Newtonsoft.Json;
using StackExchange.Redis;


namespace RedisUtil
{
    /// 
    /// Redis操作
    /// 
    public class RedisHelper
    {
        private int DbNum { get; set; }
        private readonly ConnectionMultiplexer _conn;
        public string CustomKey;

        #region 构造函数

        public RedisHelper(int dbNum = 0)
                : this(dbNum, null)
        {
        }

        public RedisHelper(int dbNum, string readWriteHosts)
        {
            DbNum = dbNum;
            _conn =
                string.IsNullOrWhiteSpace(readWriteHosts) ?
                RedisConnectionHelp.Instance :
                RedisConnectionHelp.GetConnectionMultiplexer(readWriteHosts);
        }

        #endregion 构造函数

        #region String

        #region 同步方法

        /// 
        /// 保存单个key value
        /// 
        /// Redis Key
        /// 保存的值
        /// 过期时间
        /// 
        public bool StringSet(string key, string value, TimeSpan? expiry = default(TimeSpan?))
        {
            key = AddSysCustomKey(key);
            return Do(db => db.StringSet(key, value, expiry));
        }

        /// 
        /// 保存多个key value
        /// 
        /// 键值对
        /// 
        public bool StringSet(List> keyValues)
        {
            List> newkeyValues =
                keyValues.Select(p => new KeyValuePair(AddSysCustomKey(p.Key), p.Value)).ToList();
            return Do(db => db.StringSet(newkeyValues.ToArray()));
        }

        /// 
        /// 保存一个对象
        /// 
        /// 
        /// 
        /// 
        /// 
        /// 
        public bool StringSet(string key, T obj, TimeSpan? expiry = default(TimeSpan?))
        {
            key = AddSysCustomKey(key);
            string json = ConvertJson(obj);
            return Do(db => db.StringSet(key, json, expiry));
        }

        /// 
        /// 获取单个key的值
        /// 
        /// Redis Key
        /// 
        public string StringGet(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.StringGet(key));
        }

        /// 
        /// 获取多个Key
        /// 
        /// Redis Key集合
        /// 
        public RedisValue[] StringGet(List listKey)
        {
            List newKeys = listKey.Select(AddSysCustomKey).ToList();
            return Do(db => db.StringGet(ConvertRedisKeys(newKeys)));
        }

        /// 
        /// 获取一个key的对象
        /// 
        /// 
        /// 
        /// 
        public T StringGet(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db => ConvertObj(db.StringGet(key)));
        }

        /// 
        /// 为数字增长val
        /// 
        /// 
        /// 可以为负
        /// 增长后的值
        public double StringIncrement(string key, double val = 1)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.StringIncrement(key, val));
        }

        /// 
        /// 为数字减少val
        /// 
        /// 
        /// 可以为负
        /// 减少后的值
        public double StringDecrement(string key, double val = 1)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.StringDecrement(key, val));
        }

        #endregion 同步方法

        #region 异步方法

        /// 
        /// 保存单个key value
        /// 
        /// Redis Key
        /// 保存的值
        /// 过期时间
        /// 
        public async Task StringSetAsync(string key, string value, TimeSpan? expiry = default(TimeSpan?))
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.StringSetAsync(key, value, expiry));
        }

        /// 
        /// 保存多个key value
        /// 
        /// 键值对
        /// 
        public async Task StringSetAsync(List> keyValues)
        {
            List> newkeyValues =
                keyValues.Select(p => new KeyValuePair(AddSysCustomKey(p.Key), p.Value)).ToList();
            return await Do(db => db.StringSetAsync(newkeyValues.ToArray()));
        }

        /// 
        /// 保存一个对象
        /// 
        /// 
        /// 
        /// 
        /// 
        /// 
        public async Task StringSetAsync(string key, T obj, TimeSpan? expiry = default(TimeSpan?))
        {
            key = AddSysCustomKey(key);
            string json = ConvertJson(obj);
            return await Do(db => db.StringSetAsync(key, json, expiry));
        }

        /// 
        /// 获取单个key的值
        /// 
        /// Redis Key
        /// 
        public async Task StringGetAsync(string key)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.StringGetAsync(key));
        }

        /// 
        /// 获取多个Key
        /// 
        /// Redis Key集合
        /// 
        public async Task StringGetAsync(List listKey)
        {
            List newKeys = listKey.Select(AddSysCustomKey).ToList();
            return await Do(db => db.StringGetAsync(ConvertRedisKeys(newKeys)));
        }

        /// 
        /// 获取一个key的对象
        /// 
        /// 
        /// 
        /// 
        public async Task StringGetAsync(string key)
        {
            key = AddSysCustomKey(key);
            string result = await Do(db => db.StringGetAsync(key));
            return ConvertObj(result);
        }

        /// 
        /// 为数字增长val
        /// 
        /// 
        /// 可以为负
        /// 增长后的值
        public async Task StringIncrementAsync(string key, double val = 1)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.StringIncrementAsync(key, val));
        }

        /// 
        /// 为数字减少val
        /// 
        /// 
        /// 可以为负
        /// 减少后的值
        public async Task StringDecrementAsync(string key, double val = 1)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.StringDecrementAsync(key, val));
        }

        #endregion 异步方法

        #endregion String

        #region Hash

        #region 同步方法

        /// 
        /// 判断某个数据是否已经被缓存
        /// 
        /// 
        /// 
        /// 
        public bool HashExists(string key, string dataKey)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.HashExists(key, dataKey));
        }

        /// 
        /// 存储数据到hash表
        /// 
        /// 
        /// 
        /// 
        /// 
        /// 
        public bool HashSet(string key, string dataKey, T t)
        {
            key = AddSysCustomKey(key);
            return Do(db =>
            {
                string json = ConvertJson(t);
                return db.HashSet(key, dataKey, json);
            });
        }

        /// 
        /// 移除hash中的某值
        /// 
        /// 
        /// 
        /// 
        public bool HashDelete(string key, string dataKey)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.HashDelete(key, dataKey));
        }

        /// 
        /// 移除hash中的多个值
        /// 
        /// 
        /// 
        /// 
        public long HashDelete(string key, List dataKeys)
        {
            key = AddSysCustomKey(key);
            //List dataKeys1 = new List() {"1","2"};
            return Do(db => db.HashDelete(key, dataKeys.ToArray()));
        }

        /// 
        /// 从hash表获取数据
        /// 
        /// 
        /// 
        /// 
        /// 
        public T HashGet(string key, string dataKey)
        {
            key = AddSysCustomKey(key);
            return Do(db =>
            {
                string value = db.HashGet(key, dataKey);
                return ConvertObj(value);
            });
        }

        /// 
        /// 为数字增长val
        /// 
        /// 
        /// 
        /// 可以为负
        /// 增长后的值
        public double HashIncrement(string key, string dataKey, double val = 1)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.HashIncrement(key, dataKey, val));
        }

        /// 
        /// 为数字减少val
        /// 
        /// 
        /// 
        /// 可以为负
        /// 减少后的值
        public double HashDecrement(string key, string dataKey, double val = 1)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.HashDecrement(key, dataKey, val));
        }

        /// 
        /// 获取hashkey所有Redis key
        /// 
        /// 
        /// 
        /// 
        public List HashKeys(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db =>
            {
                RedisValue[] values = db.HashKeys(key);
                return ConvetList(values);
            });
        }

        #endregion 同步方法

        #region 异步方法

        /// 
        /// 判断某个数据是否已经被缓存
        /// 
        /// 
        /// 
        /// 
        public async Task HashExistsAsync(string key, string dataKey)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.HashExistsAsync(key, dataKey));
        }

        /// 
        /// 存储数据到hash表
        /// 
        /// 
        /// 
        /// 
        /// 
        /// 
        public async Task HashSetAsync(string key, string dataKey, T t)
        {
            key = AddSysCustomKey(key);
            return await Do(db =>
            {
                string json = ConvertJson(t);
                return db.HashSetAsync(key, dataKey, json);
            });
        }

        /// 
        /// 移除hash中的某值
        /// 
        /// 
        /// 
        /// 
        public async Task HashDeleteAsync(string key, string dataKey)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.HashDeleteAsync(key, dataKey));
        }

        /// 
        /// 移除hash中的多个值
        /// 
        /// 
        /// 
        /// 
        public async Task HashDeleteAsync(string key, List dataKeys)
        {
            key = AddSysCustomKey(key);
            //List dataKeys1 = new List() {"1","2"};
            return await Do(db => db.HashDeleteAsync(key, dataKeys.ToArray()));
        }

        /// 
        /// 从hash表获取数据
        /// 
        /// 
        /// 
        /// 
        /// 
        public async Task HashGeAsync(string key, string dataKey)
        {
            key = AddSysCustomKey(key);
            string value = await Do(db => db.HashGetAsync(key, dataKey));
            return ConvertObj(value);
        }

        /// 
        /// 为数字增长val
        /// 
        /// 
        /// 
        /// 可以为负
        /// 增长后的值
        public async Task HashIncrementAsync(string key, string dataKey, double val = 1)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.HashIncrementAsync(key, dataKey, val));
        }

        /// 
        /// 为数字减少val
        /// 
        /// 
        /// 
        /// 可以为负
        /// 减少后的值
        public async Task HashDecrementAsync(string key, string dataKey, double val = 1)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.HashDecrementAsync(key, dataKey, val));
        }

        /// 
        /// 获取hashkey所有Redis key
        /// 
        /// 
        /// 
        /// 
        public async Task> HashKeysAsync(string key)
        {
            key = AddSysCustomKey(key);
            RedisValue[] values = await Do(db => db.HashKeysAsync(key));
            return ConvetList(values);
        }

        #endregion 异步方法

        #endregion Hash

        #region List

        #region 同步方法

        /// 
        /// 移除指定ListId的内部List的值
        /// 
        /// 
        /// 
        public void ListRemove(string key, T value)
        {
            key = AddSysCustomKey(key);
            Do(db => db.ListRemove(key, ConvertJson(value)));
        }

        /// 
        /// 获取指定key的List
        /// 
        /// 
        /// 
        public List ListRange(string key)
        {
            key = AddSysCustomKey(key);
            return Do(redis =>
            {
                var values = redis.ListRange(key);
                return ConvetList(values);
            });
        }

        /// 
        /// 入队
        /// 
        /// 
        /// 
        public void ListRightPush(string key, T value)
        {
            key = AddSysCustomKey(key);
            Do(db => db.ListRightPush(key, ConvertJson(value)));
        }

        /// 
        /// 出队
        /// 
        /// 
        /// 
        /// 
        public T ListRightPop(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db =>
             {
                 var value = db.ListRightPop(key);
                 return ConvertObj(value);
             });
        }

        /// 
        /// 入栈
        /// 
        /// 
        /// 
        /// 
        public void ListLeftPush(string key, T value)
        {
            key = AddSysCustomKey(key);
            Do(db => db.ListLeftPush(key, ConvertJson(value)));
        }

        /// 
        /// 出栈
        /// 
        /// 
        /// 
        /// 
        public T ListLeftPop(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db =>
            {
                var value = db.ListLeftPop(key);
                return ConvertObj(value);
            });
        }

        /// 
        /// 获取集合中的数量
        /// 
        /// 
        /// 
        public long ListLength(string key)
        {
            key = AddSysCustomKey(key);
            return Do(redis => redis.ListLength(key));
        }

        #endregion 同步方法

        #region 异步方法

        /// 
        /// 移除指定ListId的内部List的值
        /// 
        /// 
        /// 
        public async Task ListRemoveAsync(string key, T value)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.ListRemoveAsync(key, ConvertJson(value)));
        }

        /// 
        /// 获取指定key的List
        /// 
        /// 
        /// 
        public async Task> ListRangeAsync(string key)
        {
            key = AddSysCustomKey(key);
            var values = await Do(redis => redis.ListRangeAsync(key));
            return ConvetList(values);
        }

        /// 
        /// 入队
        /// 
        /// 
        /// 
        public async Task ListRightPushAsync(string key, T value)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.ListRightPushAsync(key, ConvertJson(value)));
        }

        /// 
        /// 出队
        /// 
        /// 
        /// 
        /// 
        public async Task ListRightPopAsync(string key)
        {
            key = AddSysCustomKey(key);
            var value = await Do(db => db.ListRightPopAsync(key));
            return ConvertObj(value);
        }

        /// 
        /// 入栈
        /// 
        /// 
        /// 
        /// 
        public async Task ListLeftPushAsync(string key, T value)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.ListLeftPushAsync(key, ConvertJson(value)));
        }

        /// 
        /// 出栈
        /// 
        /// 
        /// 
        /// 
        public async Task ListLeftPopAsync(string key)
        {
            key = AddSysCustomKey(key);
            var value = await Do(db => db.ListLeftPopAsync(key));
            return ConvertObj(value);
        }

        /// 
        /// 获取集合中的数量
        /// 
        /// 
        /// 
        public async Task ListLengthAsync(string key)
        {
            key = AddSysCustomKey(key);
            return await Do(redis => redis.ListLengthAsync(key));
        }

        #endregion 异步方法

        #endregion List

        #region SortedSet 有序集合

        #region 同步方法

        /// 
        /// 添加
        /// 
        /// 
        /// 
        /// 
        public bool SortedSetAdd(string key, T value, double score)
        {
            key = AddSysCustomKey(key);
            return Do(redis => redis.SortedSetAdd(key, ConvertJson(value), score));
        }

        /// 
        /// 删除
        /// 
        /// 
        /// 
        public bool SortedSetRemove(string key, T value)
        {
            key = AddSysCustomKey(key);
            return Do(redis => redis.SortedSetRemove(key, ConvertJson(value)));
        }

        /// 
        /// 获取全部
        /// 
        /// 
        /// 
        public List SortedSetRangeByRank(string key)
        {
            key = AddSysCustomKey(key);
            return Do(redis =>
            {
                var values = redis.SortedSetRangeByRank(key);
                return ConvetList(values);
            });
        }

        /// 
        /// 获取集合中的数量
        /// 
        /// 
        /// 
        public long SortedSetLength(string key)
        {
            key = AddSysCustomKey(key);
            return Do(redis => redis.SortedSetLength(key));
        }

        #endregion 同步方法

        #region 异步方法

        /// 
        /// 添加
        /// 
        /// 
        /// 
        /// 
        public async Task SortedSetAddAsync(string key, T value, double score)
        {
            key = AddSysCustomKey(key);
            return await Do(redis => redis.SortedSetAddAsync(key, ConvertJson(value), score));
        }

        /// 
        /// 删除
        /// 
        /// 
        /// 
        public async Task SortedSetRemoveAsync(string key, T value)
        {
            key = AddSysCustomKey(key);
            return await Do(redis => redis.SortedSetRemoveAsync(key, ConvertJson(value)));
        }

        /// 
        /// 获取全部
        /// 
        /// 
        /// 
        public async Task> SortedSetRangeByRankAsync(string key)
        {
            key = AddSysCustomKey(key);
            var values = await Do(redis => redis.SortedSetRangeByRankAsync(key));
            return ConvetList(values);
        }

        /// 
        /// 获取集合中的数量
        /// 
        /// 
        /// 
        public async Task SortedSetLengthAsync(string key)
        {
            key = AddSysCustomKey(key);
            return await Do(redis => redis.SortedSetLengthAsync(key));
        }

        #endregion 异步方法

        #endregion SortedSet 有序集合

        #region key

        /// 
        /// 删除单个key
        /// 
        /// redis key
        /// 是否删除成功
        public bool KeyDelete(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.KeyDelete(key));
        }

        /// 
        /// 删除多个key
        /// 
        /// rediskey
        /// 成功删除的个数
        public long KeyDelete(List keys)
        {
            List newKeys = keys.Select(AddSysCustomKey).ToList();
            return Do(db => db.KeyDelete(ConvertRedisKeys(newKeys)));
        }

        /// 
        /// 判断key是否存储
        /// 
        /// redis key
        /// 
        public bool KeyExists(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.KeyExists(key));
        }

        /// 
        /// 重新命名key
        /// 
        /// 就的redis key
        /// 新的redis key
        /// 
        public bool KeyRename(string key, string newKey)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.KeyRename(key, newKey));
        }

        /// 
        /// 设置Key的时间
        /// 
        /// redis key
        /// 
        /// 
        public bool KeyExpire(string key, TimeSpan? expiry = default(TimeSpan?))
        {
            key = AddSysCustomKey(key);
            return Do(db => db.KeyExpire(key, expiry));
        }

        #endregion key

        #region 发布订阅

        /// 
        /// Redis发布订阅  订阅
        /// 
        /// 
        /// 
        public void Subscribe(string subChannel, Action handler = null)
        {
            ISubscriber sub = _conn.GetSubscriber();
            sub.Subscribe(subChannel, (channel, message) =>
            {
                if (handler == null)
                {
                    Console.WriteLine(subChannel + " 订阅收到消息:" + message);
                }
                else
                {
                    handler(channel, message);
                }
            });
        }

        /// 
        /// Redis发布订阅  发布
        /// 
        /// 
        /// 
        /// 
        /// 
        public long Publish(string channel, T msg)
        {
            ISubscriber sub = _conn.GetSubscriber();
            return sub.Publish(channel, ConvertJson(msg));
        }

        /// 
        /// Redis发布订阅  取消订阅
        /// 
        /// 
        public void Unsubscribe(string channel)
        {
            ISubscriber sub = _conn.GetSubscriber();
            sub.Unsubscribe(channel);
        }

        /// 
        /// Redis发布订阅  取消全部订阅
        /// 
        public void UnsubscribeAll()
        {
            ISubscriber sub = _conn.GetSubscriber();
            sub.UnsubscribeAll();
        }

        #endregion 发布订阅

        #region 其他

        public ITransaction CreateTransaction()
        {
            return GetDatabase().CreateTransaction();
        }

        public IDatabase GetDatabase()
        {
            return _conn.GetDatabase(DbNum);
        }

        public IServer GetServer(string hostAndPort)
        {
            return _conn.GetServer(hostAndPort);
        }

        /// 
        /// 设置前缀
        /// 
        /// 
        public void SetSysCustomKey(string customKey)
        {
            CustomKey = customKey;
        }

        #endregion 其他

        #region 辅助方法

        private string AddSysCustomKey(string oldKey)
        {
            var prefixKey = CustomKey ?? RedisConnectionHelp.SysCustomKey;
            return prefixKey + oldKey;
        }

        private T Do(Func func)
        {
            var database = _conn.GetDatabase(DbNum);
            return func(database);
        }

        private string ConvertJson(T value)
        {
            string result = value is string ? value.ToString() : JsonConvert.SerializeObject(value);
            return result;
        }

        private T ConvertObj(RedisValue value)
        {
            return JsonConvert.DeserializeObject(value);
        }

        private List ConvetList(RedisValue[] values)
        {
            List result = new List();
            foreach (var item in values)
            {
                var model = ConvertObj(item);
                result.Add(model);
            }
            return result;
        }

        private RedisKey[] ConvertRedisKeys(List redisKeys)
        {
            return redisKeys.Select(redisKey => (RedisKey)redisKey).ToArray();
        }

        #endregion 辅助方法
    }
}

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