研究了下redis在.net下的使用，因为以前在java上用redis用的是jedis操作，在.net不是很熟悉，在网站上也看了一部分的.net下redis的使用，大部分都是ServiceStack.Redis听说ServiceStack.Redis4.0版本都是收费的，这个我不是很清楚，但是我确实有项目再用ServiceStack.Redis。

这里就不讨论ServiceStack.Redis的使用今天带来的是StackExchange.Redis的封装版。

代码参考

DDD领域驱动之干货（三）完结篇！

下面是干货

RedisCaching里面放着的是Redis的基本5个方法分别如下图所示：

RedisCommon里面放着的是redis的帮助类和初始化类如下图所示：

现在举了例子就以DoRedisStringCache为例：

实现了接口IRedisCaching，当然这里这个接口是标识接口意思就是用来约束的。

StackExchange.Redis是初始化是单列模式，内部有一套自己的方法，这里我就放一下代码

这里面还有6个事件如下图：

代码贴出来：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using StackExchange.Redis;
using KuRuMi.Mio.DoMain.Infrastructure.Logger;

namespace KuRuMi.Mio.DoMain.RedisCache.RedisCommon
{
    public class RedisManager
    {
        private static string Constring = RedisConfig.Config();
        private static readonly object locker = new object();
        private static ConnectionMultiplexer instance;
        private static readonly Dictionary<string, ConnectionMultiplexer> Concache = new Dictionary<string, ConnectionMultiplexer>();

        /// <summary>
        /// 单例模式获取redis连接实例
        /// </summary>
        public static ConnectionMultiplexer Instance
        {
            get
            {
                if (instance == null)
                {
                    lock (locker)
                    {
                        if (instance == null)
                            instance = GetManager();
                    }
                }
                return instance;
            }
        }

        /// <summary>
        /// 从缓存中获取
        /// </summary>
        /// <param name="constr"></param>
        /// <returns></returns>
        public static ConnectionMultiplexer GetConForMap(string constr) {
            if (!Concache.ContainsKey(constr))
                Concache[constr] = GetManager(constr);
            return Concache[constr];
        }

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

            #region 注册事件
            connect.ConnectionFailed += MuxerConnectionFailed;
            connect.ConnectionRestored += MuxerConnectionRestored;
            connect.ErrorMessage += MuxerErrorMessage;
            connect.ConfigurationChanged += MuxerConfigurationChanged;
            connect.HashSlotMoved += MuxerHashSlotMoved;
            connect.InternalError += MuxerInternalError;
            #endregion

            return connect;
        }
        #region Redis事件
        /// <summary>
        /// 内部异常
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void MuxerInternalError(object sender, InternalErrorEventArgs e)
        {
            Units.Log("内部异常：" + e.Exception.Message);
        }

        /// <summary>
        /// 集群更改
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void MuxerHashSlotMoved(object sender, HashSlotMovedEventArgs e)
        {
            Units.Log("新集群：" + e.NewEndPoint + "旧集群：" + e.OldEndPoint);
        }

        /// <summary>
        /// 配置更改事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void MuxerConfigurationChanged(object sender, EndPointEventArgs e)
        {
            Units.Log("配置更改：" + e.EndPoint);
        }

        /// <summary>
        /// 错误事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void MuxerErrorMessage(object sender, RedisErrorEventArgs e)
        {
            Units.Log("异常信息：" + e.Message);
        }

        /// <summary>
        /// 重连错误事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void MuxerConnectionRestored(object sender, ConnectionFailedEventArgs e)
        {
            Units.Log("重连错误" + e.EndPoint);
        }

        /// <summary>
        /// 连接失败事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void MuxerConnectionFailed(object sender, ConnectionFailedEventArgs e)
        {
            Units.Log("连接异常" + e.EndPoint + "，类型为" + e.FailureType + (e.Exception == null ? "" : ("，异常信息是" + e.Exception.Message)));
        }
        #endregion
    }
}

下面是redis的config：

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace KuRuMi.Mio.DoMain.RedisCache.RedisCommon
{
    public sealed class RedisConfig
    {
        public static readonly string config = ConfigurationManager.AppSettings["RedisConfig"];
        public static readonly string redisKey = ConfigurationManager.AppSettings["RedisKey"] ?? "";
        public static string Config() {
            return config;
        }
        public static string Key() {
            return redisKey;
        }
    }
}

下面是redis的helper：

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

namespace KuRuMi.Mio.DoMain.RedisCache.RedisCommon
{
    public class RedisBase
    {
        private static ConnectionMultiplexer db = null;
        private static string key = string.Empty;

        private int DbNumber { get; }
        public RedisBase(int dbnum = 0) : this(dbnum, null)
        {

        }

        public RedisBase(int dbnum, string connectionString)
        {
            DbNumber = dbnum;
            db = string.IsNullOrWhiteSpace(connectionString) ? RedisManager.Instance : RedisManager.GetConForMap(connectionString);
        }

        #region 辅助方法
        /// <summary>
        /// 添加名称
        /// </summary>
        /// <param name="old"></param>
        /// <returns></returns>
        public string AddKey(string old)
        {
            var fixkey = key ?? RedisConfig.Key();
            return fixkey + old;
        }

        /// <summary>
        /// 执行保存
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="func"></param>
        /// <returns></returns>
        public T DoSave<T>(Func<IDatabase, T> func)
        {
            return func(db.GetDatabase(DbNumber));
        }
        public string ConvertJson<T>(T val)
        {
            return val is string ? val.ToString() : JsonConvert.SerializeObject(val);
        }

        public T ConvertObj<T>(RedisValue val)
        {
            return JsonConvert.DeserializeObject<T>(val);
        }

        public List<T> ConvertList<T>(RedisValue[] val)
        {
            List<T> result = new List<T>();
            foreach (var item in val)
            {
                var model = ConvertObj<T>(item);
                result.Add(model);
            }
            return result;
        }

        public RedisKey[] ConvertRedisKeys(List<string> val)
        {
            return val.Select(k => (RedisKey)k).ToArray();
        }
        #endregion
    }
}

下面是我的string封装方法：

using KuRuMi.Mio.DoMain.RedisCache.RedisCommon;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace KuRuMi.Mio.DoMain.RedisCache.RedisCaching
{
    /// <summary>
    /// 表示string的操作
    /// </summary>
    public class DoRedisStringCache : IRedisCaching
    {
        private RedisBase redis = null;
        public DoRedisStringCache()
        {
            redis = new RedisBase();
        }

        #region 同步执行
        /// <summary>
        /// 单个保存
        /// </summary>
        /// <param name="key"></param>
        /// <param name="val">值</param>
        /// <param name="exp">过期时间</param>
        /// <returns></returns>
        public bool StringSet(string key, string val, TimeSpan? exp = default(TimeSpan?))
        {
            key = redis.AddKey(key);
            return redis.DoSave(db => db.StringSet(key, val, exp));
        }

        /// <summary>
        /// 保存多个key value
        /// </summary>
        /// <param name="keyValues">键值对</param>
        /// <returns></returns>
        public bool StringSet(List<KeyValuePair<RedisKey, RedisValue>> KeyVal)
        {
            List<KeyValuePair<RedisKey, RedisValue>> newkey = KeyVal.Select(k => new KeyValuePair<RedisKey, RedisValue>(redis.AddKey(k.Key), k.Value)).ToList();
            return redis.DoSave(db => db.StringSet(newkey.ToArray()));
        }

        /// <summary>
        /// 保存一个对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <param name="obj"></param>
        /// <param name="exp"></param>
        /// <returns></returns>
        public bool StringSet<T>(string key, T obj, TimeSpan? exp = default(TimeSpan?))
        {
            key = redis.AddKey(key);
            string json = redis.ConvertJson(obj);
            return redis.DoSave(db => db.StringSet(key, json, exp));
        }

        /// <summary>
        /// 获取单个
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public string StringGet(string key)
        {
           key = redis.AddKey(key);
            return redis.DoSave(db => db.StringGet(key));
        }
        /// <summary>
        /// 获取单个对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <returns></returns>
        public T StringGet<T>(string key) {
            key = redis.AddKey(key);
            var val = redis.DoSave(db => db.StringGet(key));
            return redis.ConvertObj<T>(val);
        }

        /// <summary>
        /// 为数字增长val
        /// </summary>
        /// <param name="key"></param>
        /// <param name="val">可以为负数</param>
        /// <returns>增长后的值</returns>
        public double StringIncrement(string key, double val = 1)
        {
           key = redis.AddKey(key);
            return redis.DoSave(db => db.StringIncrement(key, val));
        }
        /// <summary>
        /// 为数字减少val
        /// </summary>
        /// <param name="key"></param>
        /// <param name="val">可以为负数</param>
        /// <returns>增长后的值</returns>
        public double StringDecrement(string key, double val = 1)
        {
           key = redis.AddKey(key);
            return redis.DoSave(db => db.StringDecrement(key, val));
        }
        #endregion

        #region 异步执行
        /// <summary>
        /// 异步保存单个
        /// </summary>
        /// <param name="key"></param>
        /// <param name="val"></param>
        /// <param name="exp"></param>
        /// <returns></returns>
        public async Task<bool> StringSetAsync(string key, string val, TimeSpan? exp = default(TimeSpan?))
        {
            key = redis.AddKey(key);
            return await redis.DoSave(db => db.StringSetAsync(key, val, exp));
        }
        /// <summary>
        /// 异步保存多个key value
        /// </summary>
        /// <param name="keyValues">键值对</param>
        /// <returns></returns>
        public async Task<bool> StringSetAsync(List<KeyValuePair<RedisKey, RedisValue>> KeyVal)
        {
            List<KeyValuePair<RedisKey, RedisValue>> newkey = KeyVal.Select(k => new KeyValuePair<RedisKey, RedisValue>(redis.AddKey(k.Key), k.Value)).ToList();
            return await redis.DoSave(db => db.StringSetAsync(newkey.ToArray()));
        }

        /// <summary>
        /// 异步保存一个对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <param name="obj"></param>
        /// <param name="exp"></param>
        /// <returns></returns>
        public async Task<bool> StringSetAsync<T>(string key, T obj, TimeSpan? exp = default(TimeSpan?))
        {
            key = redis.AddKey(key);
            string json = redis.ConvertJson(obj);
            return await redis.DoSave(db => db.StringSetAsync(key, json, exp));
        }

        /// <summary>
        /// 异步获取单个
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public async Task<string> StringGetAsync(string key)
        {
           key = redis.AddKey(key);
            return await redis.DoSave(db => db.StringGetAsync(key));
        }

        /// <summary>
        /// 异步获取单个
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public async Task<T> StringGetAsync<T>(string key)
        {
            key = redis.AddKey(key);
            var val = await redis.DoSave(db => db.StringGetAsync(key));
            return redis.ConvertObj<T>(val);
        }

        /// <summary>
        /// 异步为数字增长val
        /// </summary>
        /// <param name="key"></param>
        /// <param name="val">可以为负数</param>
        /// <returns>增长后的值</returns>
        public async Task<double> StringIncrementAsync(string key, double val = 1)
        {
           key = redis.AddKey(key);
            return await redis.DoSave(db => db.StringIncrementAsync(key, val));
        }
        /// <summary>
        /// 为数字减少val
        /// </summary>
        /// <param name="key"></param>
        /// <param name="val">可以为负数</param>
        /// <returns>增长后的值</returns>
        public async Task<double> StringDecrementAsync(string key, double val = 1)
        {
           key = redis.AddKey(key);
            return await redis.DoSave(db => db.StringDecrementAsync(key, val));
        }
        #endregion
    }
}

StackExchange.Redis本身提供了一套异步的方法这个我比较喜欢。至于其他的和string的同理，我这里就不放出封装方法，需要的留言。

最后是测试：

这是我的redis然后是我的数据库

这里是我登录的测试代码：