电商系统架构总结2（Redis）

二  Redis缓存

 考虑到将来服务器的升级扩展，使用redis代替.net内置缓存是比较理想的选择。redis是非常成熟好用的缓存系统，安装配置非常简单，直接上官网下载安装包 安装启动就行了。

 1 配置。redis安装后默认bind 接口是127.0.0.1，也就是本地回环地址。在开发环境下为了允许多个开发机器作为客户端访问，bind配置后面加上了本机局域网ip，如  bind 127.0.0.1 192.168.1.100 。

 2  配置了redis读写分离。开发web  api端的web.config件 增加配置项 

<add name="RedisConnection_read" connectionString="192.168.0.100:6379" />
<add name="RedisConnection_write" connectionString="192.168.0.100:6379" />

redis 读写辅助类代码如下

+ View Code?

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public class RedisCache: IRedisCache  {      private static string[] ReadWriteHosts = ConfigurationManager.ConnectionStrings["RedisConnection_read"].ConnectionString.Split(';');      private static string[] ReadOnlyHosts = ConfigurationManager.ConnectionStrings["RedisConnection_write"].ConnectionString.Split(';');        #region -- 连接信息 --      public static PooledRedisClientManager prcm = CreateManager(ReadWriteHosts, ReadOnlyHosts);        private static PooledRedisClientManager CreateManager(string[] readWriteHosts, string[] readOnlyHosts)      {          // 支持读写分离，均衡负载           return new PooledRedisClientManager(readWriteHosts, readOnlyHosts, new RedisClientManagerConfig          {              MaxWritePoolSize = 5, // “写”链接池链接数               MaxReadPoolSize = 5, // “读”链接池链接数               AutoStart = true,          });      }      #endregion        #region -- Item --      /// <summary>      /// 设置单体      /// </summary>      /// <typeparam name="T"></typeparam>      /// <param name="key"></param>      /// <param name="t"></param>      /// <param name="timeSpan"></param>      /// <returns></returns>      public  bool Item_Set<T>(string key, T t)      {          try          {              using (IRedisClient redis = prcm.GetClient())              {                  return redis.Set<T>(key, t, new TimeSpan(1, 0, 0));              }          }          catch (Exception ex)          {              throw ex;          }               }        /// <summary>      /// 设置单体      /// </summary>      /// <typeparam name="T"></typeparam>      /// <param name="key"></param>      /// <param name="t"></param>      /// <param name="timeSpan"></param>      /// <returns></returns>      public  bool Item_Set<T>(string key, T t, int timeout)      {          try          {              using (IRedisClient redis = prcm.GetClient())              {                  return redis.Set<T>(key, t, new TimeSpan(0, timeout, 0));              }          }          catch (Exception ex)          {              throw ex;          }                }          /// <summary>      /// 获取单体      /// </summary>      /// <typeparam name="T"></typeparam>      /// <param name="key"></param>      /// <returns></returns>      public  T Item_Get<T>(string key) where T : class      {          using (IRedisClient redis = prcm.GetReadOnlyClient())          {              return redis.Get<T>(key);          }      }        /// <summary>      /// 设置缓存过期      /// </summary>      /// <param name="key"></param>      /// <param name="datetime"></param>      public  bool Item_Remove(string key)      {          using (IRedisClient redis = prcm.GetClient())          {              return redis.Remove(key);          }      }        /// <summary>      /// 设置缓存过期      /// </summary>      /// <param name="key"></param>      public  bool Item_SetExpire(string key, int timeout)      {          using (IRedisClient redis = prcm.GetClient())          {              return redis.ExpireEntryIn(key, new TimeSpan(0, timeout, 0));          }      }        #endregion        #region -- List --        public  void List_Add<T>(string key, T t)      {          using (IRedisClient redis = prcm.GetClient())          {                var redisTypedClient = redis.As<T>();              redisTypedClient.AddItemToList(redisTypedClient.Lists[key], t);                        }      }        public void List_Set<T>(string key, List<T> list)      {          using (IRedisClient redis = prcm.GetClient())          {                var redisTypedClient = redis.As<T>();              redisTypedClient.Lists[key].RemoveAll();              if (list != null)              {                  list.ForEach(p =>                  {                                          redisTypedClient.AddItemToList(redisTypedClient.Lists[key], p);                  });              }            }      }          public  bool List_Remove<T>(string key, T t)      {          using (IRedisClient redis = prcm.GetClient())          {              var redisTypedClient = redis.As<T>();              return redisTypedClient.RemoveItemFromList(redisTypedClient.Lists[key], t) > 0;          }      }      public  void List_RemoveAll<T>(string key)      {          using (IRedisClient redis = prcm.GetClient())          {              var redisTypedClient = redis.As<T>();              redisTypedClient.Lists[key].RemoveAll();          }      }        public  void List_RemoveRange<T>(string key,List<T> list)      {          using (IRedisClient redis = prcm.GetClient())          {              var redisTypedClient = redis.As<T>();              if (list != null && list.Count > 0)              {                  for(int i=0; i<list.Count;i++)                  {                      List_Remove<T>(key, list[i]);                  }                                }          }      }        public  long List_Count(string key)      {          using (IRedisClient redis = prcm.GetReadOnlyClient())          {              return redis.GetListCount(key);          }      }        public  List<T> List_GetRange<T>(string key, int start, int count)      {          using (IRedisClient redis = prcm.GetReadOnlyClient())          {              var c = redis.As<T>();              return c.Lists[key].GetRange(start, start + count - 1);          }      }          public  List<T> List_GetList<T>(string key)      {          RedisClient client = new RedisClient("");          using (IRedisClient redis = prcm.GetReadOnlyClient())          {              var c = redis.As<T>();              return c.Lists[key].GetRange(0, c.Lists[key].Count);          }      }        public  List<T> List_GetList<T>(string key, int pageIndex, int pageSize)      {          int start = pageSize * (pageIndex - 1);          return List_GetRange<T>(key, start, pageSize);      }        /// <summary>      /// 设置缓存过期      /// </summary>      /// <param name="key"></param>      /// <param name="datetime"></param>      public  void List_SetExpire(string key, DateTime datetime)      {          using (IRedisClient redis = prcm.GetClient())          {              redis.ExpireEntryAt(key, datetime);          }      }      #endregion        #region -- Set --      public  void Set_Add<T>(string key, T t)      {          using (IRedisClient redis = prcm.GetClient())          {              var redisTypedClient = redis.As<T>();              redisTypedClient.Sets[key].Add(t);          }      }      public  bool Set_Contains<T>(string key, T t)      {          using (IRedisClient redis = prcm.GetClient())          {              var redisTypedClient = redis.As<T>();              return redisTypedClient.Sets[key].Contains(t);          }      }      public  bool Set_Remove<T>(string key, T t)      {          using (IRedisClient redis = prcm.GetClient())          {              var redisTypedClient = redis.As<T>();              return redisTypedClient.Sets[key].Remove(t);          }      }      #endregion        #region -- Hash --      /// <summary>      /// 判断某个数据是否已经被缓存      /// </summary>      /// <typeparam name="T"></typeparam>      /// <param name="key"></param>      /// <param name="dataKey"></param>      /// <returns></returns>      public  bool Hash_Exist<T>(string key, string dataKey)      {          using (IRedisClient redis = prcm.GetReadOnlyClient())          {              return redis.HashContainsEntry(key, dataKey);          }      }        /// <summary>      /// 存储数据到hash表      /// </summary>      /// <typeparam name="T"></typeparam> Class1.cs      /// <param name="key"></param>      /// <param name="dataKey"></param>      /// <returns></returns>      public  bool Hash_Set<T>(string key, string dataKey, T t)      {          using (IRedisClient redis = prcm.GetClient())          {              string value = ServiceStack.Text.JsonSerializer.SerializeToString<T>(t);              return redis.SetEntryInHash(key, dataKey, value);          }      }      /// <summary>      /// 移除hash中的某值      /// </summary>      /// <typeparam name="T"></typeparam>      /// <param name="key"></param>      /// <param name="dataKey"></param>      /// <returns></returns>      public  bool Hash_Remove(string key, string dataKey)      {          using (IRedisClient redis = prcm.GetClient())          {              return redis.RemoveEntryFromHash(key, dataKey);          }      }      /// <summary>      /// 移除整个hash      /// </summary>      /// <typeparam name="T"></typeparam>      /// <param name="key"></param>      /// <param name="dataKey"></param>      /// <returns></returns>      public  bool Hash_Remove(string key)      {          using (IRedisClient redis = prcm.GetClient())          {              return redis.Remove(key);          }      }      /// <summary>      /// 从hash表获取数据      /// </summary>      /// <typeparam name="T"></typeparam>      /// <param name="key"></param>      /// <param name="dataKey"></param>      /// <returns></returns>      public  T Hash_Get<T>(string key, string dataKey)      {          using (IRedisClient redis = prcm.GetReadOnlyClient())          {              string value = redis.GetValueFromHash(key, dataKey);              return ServiceStack.Text.JsonSerializer.DeserializeFromString<T>(value);          }      }      /// <summary>      /// 获取整个hash的数据      /// </summary>      /// <typeparam name="T"></typeparam>      /// <param name="key"></param>      /// <returns></returns>      public  List<T> Hash_GetAll<T>(string key)      {          using (IRedisClient redis = prcm.GetReadOnlyClient())          {              var list = redis.GetHashValues(key);              if (list != null && list.Count > 0)              {                  List<T> result = new List<T>();                  foreach (var item in list)                  {                      var value = ServiceStack.Text.JsonSerializer.DeserializeFromString<T>(item);                      result.Add(value);                  }                  return result;              }              return null;          }      }      /// <summary>      /// 设置缓存过期      /// </summary>      /// <param name="key"></param>      /// <param name="datetime"></param>      public  void Hash_SetExpire(string key, DateTime datetime)      {          using (IRedisClient redis = prcm.GetClient())          {              redis.ExpireEntryAt(key, datetime);          }      }        /// <summary>      /// 获取Hash集合数量      /// </summary>      /// <param name="key">Hashid</param>      public  long Hash_GetCount(string key)      {          using (IRedisClient redis = prcm.GetReadOnlyClient())          {              return redis.GetHashCount(key);          }      }      #endregion        #region -- SortedSet --      /// <summary>      ///  添加数据到 SortedSet      /// </summary>      /// <typeparam name="T"></typeparam>      /// <param name="key"></param>      /// <param name="t"></param>      /// <param name="score"></param>      public  bool SortedSet_Add<T>(string key, T t, double score)      {          using (IRedisClient redis = prcm.GetClient())          {              string value = ServiceStack.Text.JsonSerializer.SerializeToString<T>(t);              return redis.AddItemToSortedSet(key, value, score);          }      }      /// <summary>      /// 移除数据从SortedSet      /// </summary>      /// <typeparam name="T"></typeparam>      /// <param name="key"></param>      /// <param name="t"></param>      /// <returns></returns>      public  bool SortedSet_Remove<T>(string key, T t)      {          using (IRedisClient redis = prcm.GetClient())          {              string value = ServiceStack.Text.JsonSerializer.SerializeToString<T>(t);              return redis.RemoveItemFromSortedSet(key, value);          }      }      /// <summary>      /// 修剪SortedSet      /// </summary>      /// <param name="key"></param>      /// <param name="size">保留的条数</param>      /// <returns></returns>      public  long SortedSet_Trim(string key, int size)      {          using (IRedisClient redis = prcm.GetClient())          {              return redis.RemoveRangeFromSortedSet(key, size, 9999999);          }      }      /// <summary>      /// 获取SortedSet的长度      /// </summary>      /// <param name="key"></param>      /// <returns></returns>      public  long SortedSet_Count(string key)      {          using (IRedisClient redis = prcm.GetReadOnlyClient())          {              return redis.GetSortedSetCount(key);          }      }        /// <summary>      /// 获取SortedSet的分页数据      /// </summary>      /// <typeparam name="T"></typeparam>      /// <param name="key"></param>      /// <param name="pageIndex"></param>      /// <param name="pageSize"></param>      /// <returns></returns>      public  List<T> SortedSet_GetList<T>(string key, int pageIndex, int pageSize)      {          using (IRedisClient redis = prcm.GetReadOnlyClient())          {              var list = redis.GetRangeFromSortedSet(key, (pageIndex - 1) * pageSize, pageIndex * pageSize - 1);              if (list != null && list.Count > 0)              {                  List<T> result = new List<T>();                  foreach (var item in list)                  {                      var data = ServiceStack.Text.JsonSerializer.DeserializeFromString<T>(item);                      result.Add(data);                  }                  return result;              }          }          return null;      }          /// <summary>      /// 获取SortedSet的全部数据      /// </summary>      /// <typeparam name="T"></typeparam>      /// <param name="key"></param>      /// <param name="pageIndex"></param>      /// <param name="pageSize"></param>      /// <returns></returns>      public  List<T> SortedSet_GetListALL<T>(string key)      {          using (IRedisClient redis = prcm.GetReadOnlyClient())          {              var list = redis.GetRangeFromSortedSet(key, 0, 9999999);              if (list != null && list.Count > 0)              {                  List<T> result = new List<T>();                  foreach (var item in list)                  {                      var data = ServiceStack.Text.JsonSerializer.DeserializeFromString<T>(item);                      result.Add(data);                  }                  return result;              }          }          return null;      }        /// <summary>      /// 设置缓存过期      /// </summary>      /// <param name="key"></param>      /// <param name="datetime"></param>      public  void SortedSet_SetExpire(string key, DateTime datetime)      {          using (IRedisClient redis = prcm.GetClient())          {              redis.ExpireEntryAt(key, datetime);          }      }      #endregion            }

3  用 redis实现 分布式 跨应用session共享，同样，web api 的webconfig文件里session配置为

<system.web>
<sessionState mode="Custom" customProvider="RedisSessionStateStore">
<providers>
<add name="RedisSessionStateStore" type="MyProject.RedisSessionStateStore" />
</providers>
</sessionState>
...
<system.web>

RedisSessionStateStore实现代码如下：

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public class RedisSessionStateStore : SessionStateStoreProviderBase {     IRedisCache redis;     public RedisSessionStateStore()     {         redis = IDAL.DALContainer.Resolve<IRedisCache>();     }       public override SessionStateStoreData CreateNewStoreData(HttpContext context, int timeout)     {         return CreateLegitStoreData(context, null, null, timeout);     }       internal static SessionStateStoreData CreateLegitStoreData(HttpContext context, ISessionStateItemCollection sessionItems, HttpStaticObjectsCollection staticObjects, int timeout)     {         if (sessionItems == null)             sessionItems = new SessionStateItemCollection();         if (staticObjects == null && context != null)             staticObjects = SessionStateUtility.GetSessionStaticObjects(context);         return new SessionStateStoreData(sessionItems, staticObjects, timeout);     }       public override void CreateUninitializedItem(HttpContext context, string id, int timeout)     {         RedisSessionState state = new RedisSessionState(null, null, timeout);         redis.Item_Set<string>(id, state.ToJson(), timeout);     }       private SessionStateStoreData DoGet(HttpContext context, string id, bool exclusive, out bool locked, out TimeSpan lockAge, out object lockId, out SessionStateActions actionFlags)     {         locked = false;         lockId = null;         lockAge = TimeSpan.Zero;         actionFlags = SessionStateActions.None;         RedisSessionState state = RedisSessionState.FromJson(redis.Item_Get<string>(id));         if (state == null)         {             return null;         }         redis.Item_SetExpire(id, state._timeout);         return CreateLegitStoreData(context, state._sessionItems, state._staticObjects, state._timeout);     }       public override SessionStateStoreData GetItem(HttpContext context, string id, out bool locked, out TimeSpan lockAge, out object lockId, out SessionStateActions actionFlags)     {         return this.DoGet(context, id, false, out locked, out lockAge, out lockId, out actionFlags);     }       public override SessionStateStoreData GetItemExclusive(HttpContext context, string id, out bool locked, out TimeSpan lockAge, out object lockId, out SessionStateActions actionFlags)     {         return this.DoGet(context, id, true, out locked, out lockAge, out lockId, out actionFlags);     }       public override void SetAndReleaseItemExclusive(HttpContext context, string id, SessionStateStoreData item, object lockId, bool newItem)     {         ISessionStateItemCollection sessionItems = null;         HttpStaticObjectsCollection staticObjects = null;           if (item.Items.Count > 0)             sessionItems = item.Items;         if (!item.StaticObjects.NeverAccessed)             staticObjects = item.StaticObjects;           RedisSessionState state2 = new RedisSessionState(sessionItems, staticObjects, item.Timeout);           redis.Item_Set<string>(id, state2.ToJson(), item.Timeout);     }       #region "未实现方法"       public override void Dispose()     {       }       public override void EndRequest(HttpContext context)     {       }       public override void InitializeRequest(HttpContext context)     {       }       public override void ReleaseItemExclusive(HttpContext context, string id, object lockId)     {     }       public override void RemoveItem(HttpContext context, string id, object lockId, SessionStateStoreData item)     {         redis.Item_Remove(id);     }       public override void ResetItemTimeout(HttpContext context, string id)     {       }       public override bool SetItemExpireCallback(SessionStateItemExpireCallback expireCallback)     {         return true;     }       #endregion   } internal sealed class SessionStateItem {     public Dictionary<string, SaveValue> Dict;     public int Timeout; }   internal sealed class SaveValue {     public object Value { get; set; }       public Type Type { get; set; } }   internal sealed class RedisSessionState {     internal ISessionStateItemCollection _sessionItems;     internal HttpStaticObjectsCollection _staticObjects;     internal int _timeout;       internal RedisSessionState(ISessionStateItemCollection sessionItems, HttpStaticObjectsCollection staticObjects, int timeout)     {         this.Copy(sessionItems, staticObjects, timeout);     }       internal void Copy(ISessionStateItemCollection sessionItems, HttpStaticObjectsCollection staticObjects, int timeout)     {         this._sessionItems = sessionItems;         this._staticObjects = staticObjects;         this._timeout = timeout;     }       public string ToJson()     {         // 这里忽略_staticObjects这个成员。           if (_sessionItems == null || _sessionItems.Count == 0)         {             return null;         }           Dictionary<string, SaveValue> dict = new Dictionary<string, SaveValue>(_sessionItems.Count);           NameObjectCollectionBase.KeysCollection keys = _sessionItems.Keys;         string key;         object objectValue = string.Empty;         Type type = null;         //2016-09-04解决存入值没有类型导致读取值是jobject问题　　         for (int i = 0; i < keys.Count; i++)         {             key = keys[i];             objectValue = _sessionItems[key];             if (objectValue != null)             {                 type = objectValue.GetType();             }             else             {                 type = typeof(object);             }             dict.Add(key, new SaveValue { Value = objectValue, Type = type });         }           SessionStateItem item = new SessionStateItem { Dict = dict, Timeout = this._timeout };           return JsonConvert.SerializeObject(item);     }       public static RedisSessionState FromJson(string json)     {         if (string.IsNullOrEmpty(json))         {             return null;         }         try         {             SessionStateItem item = JsonConvert.DeserializeObject<SessionStateItem>(json);               SessionStateItemCollection collections = new SessionStateItemCollection();               SaveValue objectValue = null;             //2016-09-04解决读取出来的值 没有类型的问题             JsonSerializer serializer = new JsonSerializer();             StringReader sr = null;             JsonTextReader tReader = null;               foreach (KeyValuePair<string, SaveValue> kvp in item.Dict)             {                 objectValue = kvp.Value as SaveValue;                 if (objectValue.Value == null)                 {                     collections[kvp.Key] = null;                 }                 else                 {                     if (!IsValueType(objectValue.Type))                     {                         sr = new StringReader(objectValue.Value.ToString());                         tReader = new JsonTextReader(sr);                         collections[kvp.Key] = serializer.Deserialize(tReader, objectValue.Type);                     }                     else                     {                         collections[kvp.Key] = objectValue.Value;                     }                 }             }               return new RedisSessionState(collections, null, item.Timeout);         }         catch         {             return null;         }     }       /// <summary>     /// 判断是否为值类型     /// </summary>     /// <param name="type">Type</param>     /// <returns></returns>     public static bool IsValueType(Type type)     {         if (type.IsValueType)         {             return true;         }         //基础数据类型         if (type == typeof(string) || type == typeof(char)             || type == typeof(ushort) || type == typeof(short) || type == typeof(uint) || type == typeof(int)             || type == typeof(ulong) || type == typeof(long) || type == typeof(double) || type == typeof(decimal)             || type == typeof(bool)             || type == typeof(byte))         {             return true;         }         //可为null的基础数据类型         if (type.IsGenericType && !type.IsGenericTypeDefinition)         {             Type genericType = type.GetGenericTypeDefinition();               if (Object.ReferenceEquals(genericType, typeof(Nullable<>)))             {                 var actualType = type.GetGenericArguments()[0];                 return IsValueType(actualType);               }         }         return false;     } }