• StackExchange.Redis RedisHelper.cs


     从 ServiceStack.Redis  V4 折腾到V3种种....,以前听说过 StackExchange。终于下定决心换!!!网上查到一个 StackExchangeHelper.cs 具体地址忘了。

    发现了一个问题:不同项目不同命名空间,同一个实体反序列化时会出错,改成Json就OK了。代码如下:

    using My.Log;
    using StackExchange.Redis;
    using System;
    using System.Collections.Generic;
    using System.Configuration;
    using System.Data;
    using System.IO;
    using System.Linq;
    using System.Net;
    using System.Runtime.Serialization.Formatters.Binary;
    using Newtonsoft.Json;
    
    
    namespace My.Redis
    { 
        /// <summary>
        ///  
        /// </summary>
        public static class RedisHelper
        {
            private static readonly string Coonstr = ConfigurationManager.ConnectionStrings["RedisExchangeHosts"].ConnectionString;
            
            private static object _locker = new Object();
            private static ConnectionMultiplexer _instance = null;
    
            /// <summary>
            /// 返回已连接的实例, 
            /// </summary>
            public static ConnectionMultiplexer Instance
            {
                get
                {
                    if (_instance == null)
                    {
                        lock (_locker)
                        {
                            if (_instance == null || !_instance.IsConnected)
                            {
                                _instance = ConnectionMultiplexer.Connect(Coonstr);
                            }
                        }
                    }
                    //注册如下事件
                    _instance.ConnectionFailed += MuxerConnectionFailed;
                    _instance.ConnectionRestored += MuxerConnectionRestored;
                    _instance.ErrorMessage += MuxerErrorMessage;
                    _instance.ConfigurationChanged += MuxerConfigurationChanged;
                    _instance.HashSlotMoved += MuxerHashSlotMoved;
                    _instance.InternalError += MuxerInternalError; 
                    return _instance;
                }
            }
            static RedisHelper()
            {
            }
    
            /// <summary>
            /// 获取一个连接实例
            /// </summary>
            /// <returns></returns>
            public static IDatabase GetDatabase()
            {
                return Instance.GetDatabase();
            }
    
            /// <summary>
            /// 过期时间
            /// </summary>
            /// <param name="Min">分钟</param>
            /// <returns></returns>
            private static TimeSpan ExpireTimeSpan(double Min)
            {
                bool bl = bool.Parse(ConfigurationManager.AppSettings["UseRedis"]);
    
                if (bl)
                {
                    return TimeSpan.FromMinutes(Min);
                }
                else
                {
                    return TimeSpan.FromMilliseconds(1);
                }
            }
    
            
    
            /// <summary>
            /// 清除 包含特定字符的所有缓存
            /// </summary>
            public static void RemoveSpeStr(string keyStr)
            {
                List<string> listKeys = GetAllKeys();
                foreach (string k in listKeys)
                {
                    if (k.Contains(keyStr))
                    {
                        Remove(k);
                    }
                }
            }
    
    
            /// <summary>
            /// 判断在缓存中是否存在该key的缓存数据
            /// </summary>
            /// <param name="key"></param>
            /// <returns></returns>
            public static bool Exists(string key)
            { 
                return GetDatabase().KeyExists(key);  //可直接调用
            }
             
             
            /// <summary>
            /// 移除指定key的缓存
            /// </summary>
            /// <param name="key"></param>
            /// <returns></returns>
            public static bool Remove(string key)
            {
                if (Exists(key))
                {
                    return GetDatabase().KeyDelete(key);
                }
                return false;
            }
    
            /// <summary>
            ///  Set
            /// </summary>
            /// <typeparam name="T">类型</typeparam>
            /// <param name="key"></param>
            /// <param name="t"></param>
            /// <param name="timeout">多少分钟后过期</param>
            /// <returns></returns>
            public static bool Set<T>(string key, T t, double minOut = 60*3)
            { 
                return GetDatabase().StringSet(key, Serialize(t), ExpireTimeSpan(minOut));
            }
             
            /// <summary>
            /// Get
            /// </summary>
            /// <typeparam name="T"></typeparam>
            /// <param name="key"></param>
            /// <returns></returns>
            public static T Get<T>(string key)
            { 
                return Deserialize<T>(GetDatabase().StringGet(key));
            }
             
            /// <summary>
            /// DataSet 缓存
            /// </summary> 
            public static bool SetData(string key, DataSet ds, double minOut = 60*3)
            {  
                return GetDatabase().StringSet(key, Serialize(ds), ExpireTimeSpan(minOut));
            }
             
            /// <summary>
            /// 获取 DataSet 
            /// </summary> 
            public static DataSet GetDataSet(string key)
            { 
                return Deserialize<DataSet>(GetDatabase().StringGet(key)); 
            }
    
            /// <summary>
            /// 刷新缓存
            /// </summary>
            public static void FlushAll()
            {
                var endpoints = Instance.GetEndPoints();
                var server = Instance.GetServer(endpoints.First());
    
                server.FlushDatabase(); // to wipe a single database, 0 by default
                //server.FlushAllDatabases(); // to wipe all databases
            }
    
    
            /// <summary>
            /// 得到所有缓存键值
            /// </summary>
            /// <returns></returns>
            public static List<string> GetAllKeys()
            {
                List<string> lstKey = new List<string>();
                var endpoints = Instance.GetEndPoints();
                var server = Instance.GetServer(endpoints.First()); 
                var keys = server.Keys();
                foreach (var key in keys)
                {
                    lstKey.Add(key);
                }
                return lstKey;
            }
    
            //----------------------------------------------------------------------------------------------------------
            static string JsonSerialize(object o)
            {
                if (o == null)
                {
                    return null;
                } 
                return JsonConvert.SerializeObject(o);
            }
    
            static T JsonDeserialize<T>(string json)
            {
                if (json == null)
                {
                    return default(T);
                }
                return JsonConvert.DeserializeObject<T>(json);
            }
    
             
            /// <summary>
            /// 序列化对象
            /// </summary>
            /// <param name="o"></param>
            /// <returns></returns>
            static byte[] Serialize(object o)
            {
                if (o == null)
                {
                    return null;
                }
                BinaryFormatter binaryFormatter = new BinaryFormatter();
                using (MemoryStream memoryStream = new MemoryStream())
                {
                    binaryFormatter.Serialize(memoryStream, o);
                    byte[] objectDataAsStream = memoryStream.ToArray();
                    return objectDataAsStream; 
                }
            }
    
            /// <summary>
            /// 反序列化对象
            /// </summary>
            /// <typeparam name="T"></typeparam>
            /// <param name="stream"></param>
            /// <returns></returns>
            static T Deserialize<T>(byte[] stream)
            {
                if (stream == null)
                {
                    return default(T);
                }
                BinaryFormatter binaryFormatter = new BinaryFormatter();
                using (MemoryStream memoryStream = new MemoryStream(stream))
                {
                    T result = (T)binaryFormatter.Deserialize(memoryStream);
                    return result;
                }
            }
    
            /// <summary>
            /// 配置更改时
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="e"></param>
            private static void MuxerConfigurationChanged(object sender, EndPointEventArgs e)
            {
                LogHelper.LogExceRun("Configuration changed: " + e.EndPoint, new Exception());
            }
    
            /// <summary>
            /// 发生错误时
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="e"></param>
            private static void MuxerErrorMessage(object sender, RedisErrorEventArgs e)
            { 
                LogHelper.LogExceRun("ErrorMessage: " + e.Message, new Exception());
            }
    
            /// <summary>
            /// 重新建立连接之前的错误
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="e"></param>
            private static void MuxerConnectionRestored(object sender, ConnectionFailedEventArgs e)
            { 
                LogHelper.LogExceRun("ConnectionRestored: " + e.EndPoint, new Exception());
            }
    
            /// <summary>
            /// 连接失败 , 如果重新连接成功你将不会收到这个通知
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="e"></param>
            private static void MuxerConnectionFailed(object sender, ConnectionFailedEventArgs e)
            {
                LogHelper.LogExceRun("重新连接:Endpoint failed: " + e.EndPoint + ", " + e.FailureType + (e.Exception == null ? "" : (", " + e.Exception.Message)), new Exception()); 
            }
    
            /// <summary>
            /// 更改集群
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="e"></param>
            private static void MuxerHashSlotMoved(object sender, HashSlotMovedEventArgs e)
            { 
                LogHelper.LogExceRun("HashSlotMoved:NewEndPoint" + e.NewEndPoint + ", OldEndPoint" + e.OldEndPoint, new Exception()); 
            }
    
            /// <summary>
            /// redis类库错误
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="e"></param>
            private static void MuxerInternalError(object sender, InternalErrorEventArgs e)
            {
                LogHelper.LogExceRun("InternalError:Message" + e.Exception.Message, new Exception()); 
            }
             
            /// <summary>
            /// GetServer方法会接收一个EndPoint类或者一个唯一标识一台服务器的键值对
            /// 有时候需要为单个服务器指定特定的命令
            /// 使用IServer可以使用所有的shell命令,比如:
            /// DateTime lastSave = server.LastSave();
            /// ClientInfo[] clients = server.ClientList();
            /// 如果报错在连接字符串后加 ,allowAdmin=true;
            /// </summary>
            /// <returns></returns>
            public static IServer GetServer(string host, int port)
            {
                IServer server = Instance.GetServer(host, port);
                return server;
            }
    
            /// <summary>
            /// 获取全部终结点
            /// </summary>
            /// <returns></returns>
            public static EndPoint[] GetEndPoints()
            {
                EndPoint[] endpoints = Instance.GetEndPoints();
                return endpoints;
            }
    
        }
    }
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  • 原文地址:https://www.cnblogs.com/recordman/p/6053312.html
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