中台服务分层架构

 

 1、接口适配层：

方式一：动态调用RPC数据服务

方式二：基于策略模式，动态加载dll实现，例如

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/// <summary> /// 获得广告位置列表 /// </summary> /// <param name="pageSize">每页数</param> /// <param name="pageNumber">当前页数</param> /// <returns></returns> IDataReader GetAdvertPositionList(int pageSize, int pageNumber);   static BMAData() {     try     {         string[] fileNameList = Directory.GetFiles(System.Web.HttpRuntime.BinDirectory, "TMall.RDBSStrategy.*.dll", SearchOption.TopDirectoryOnly);         _irdbsstrategy = (IRDBSStrategy)Activator.CreateInstance(Type.GetType(string.Format("TMall.RDBSStrategy.{0}.RDBSStrategy, TMall.RDBSStrategy.{0}", fileNameList[0].Substring(fileNameList[0].LastIndexOf("RDBSStrategy.") + 13).Replace(".dll", "")),                                                                                     false,                                                                                     true));     }     catch     {         throw new BMAException("创建'关系数据库策略对象'失败,可能存在的原因:未将'关系数据库策略程序集'添加到bin目录中;'关系数据库策略程序集'文件名不符合'TMall.RDBSStrategy.{策略名称}.dll'格式");     }     _enablednosql = Directory.GetFiles(System.Web.HttpRuntime.BinDirectory, "TMall.NOSQLStrategy.*.dll", SearchOption.TopDirectoryOnly).Length > 0; }   /// <summary> /// 关系型数据库 /// </summary> public static IRDBSStrategy RDBS {     get { return _irdbsstrategy; } }   /// <summary> /// 用户非关系型数据库 /// </summary> public static IUserNOSQLStrategy UserNOSQL {     get     {         if (_enablednosql && BMAConfig.RedisNOSQLConfig.User.Enabled == 1)         {             if (_iusernosqlstrategy == null)             {                 lock (_locker)                 {                     if (_iusernosqlstrategy == null)                     {                         try                         {                             string[] fileNameList = Directory.GetFiles(System.Web.HttpRuntime.BinDirectory, "TMall.NOSQLStrategy.*.dll", SearchOption.TopDirectoryOnly);                             _iusernosqlstrategy = (IUserNOSQLStrategy)Activator.CreateInstance(Type.GetType(string.Format("TMall.NOSQLStrategy.{0}.UserNOSQLStrategy, TMall.NOSQLStrategy.{0}", fileNameList[0].Substring(fileNameList[0].LastIndexOf("NOSQLStrategy.") + 14).Replace(".dll", "")),                                                                                                                   false,                                                                                                                   true));                         }                         catch                         {                             throw new BMAException("创建'用户非关系数据库策略对象'失败,可能存在的原因:未将'用户非关系数据库策略程序集'添加到bin目录中;'用户非关系数据库策略程序集'文件名不符合'TMall.NOSQLStrategy.{策略名称}.dll'格式");                         }                     }                 }             }         }         return _iusernosqlstrategy;     } }