上一篇文章AgileEAS.NET之?dāng)?shù)據(jù)關(guān)系映射ORM簡(jiǎn)單介紹了一下AgileEAS.NET平臺(tái)中ORM對(duì)象的組織機(jī)構(gòu)體系，但并沒有對(duì)其所執(zhí)行的數(shù)據(jù)存取操作介紹，在AgileEAS.NET中，我對(duì)ORM實(shí)體及其上的數(shù)據(jù)操作實(shí)現(xiàn)進(jìn)行了分離，實(shí)體對(duì)象只呈現(xiàn)數(shù)據(jù)，而實(shí)體的增加、修改、更新、刪除、緩存操作都通過(guò)ORM訪問器實(shí)現(xiàn)。 在AgileEAS.NET兩個(gè)訪問器IOrmAccessor和ICacheAccessor訪問器。 IOrmAccessor完成ORM對(duì)象（實(shí)體和表）和數(shù)據(jù)庫(kù)的交互工作：查詢、增加、修改、刪除極其輔助任務(wù)，其接口詳細(xì)定義如下： /// <summary>/// 定義ORM訪問器接口。 /// </summary>public interface IOrmAccessor : IOrmEnvironment{/// <summary>/// 保存數(shù)據(jù)實(shí)體。/// </summary>/// <param name="entity">數(shù)據(jù)實(shí)體。</param>void Save(IEntity entity);/// <summary>/// 保存數(shù)據(jù)表。/// </summary>/// <param name="table">表。</param>void Save(ITable table);/// <summary>/// 保存數(shù)據(jù)表。/// </summary>/// <param name="table">表。</param>/// <param name="force">是否強(qiáng)制同步到數(shù)據(jù)庫(kù)。</param>void Save(ITable table,bool force);/// <summary>/// 保存數(shù)據(jù)表。/// </summary>/// <param name="table">表。</param>/// <param name="force">是否強(qiáng)制同步到數(shù)據(jù)庫(kù)。</param>/// <param name="transaction">數(shù)據(jù)同步過(guò)程中是否使用事務(wù)。</param>void Save(ITable table, bool force, bool transaction);/// <summary>/// 保存數(shù)據(jù)架構(gòu)。/// </summary>/// <param name="schema">架構(gòu)。</param>void Save(ISchema schema);/// <summary>/// 保存數(shù)據(jù)架構(gòu)。/// </summary>/// <param name="schema">架構(gòu)。</param>/// <param name="force">是否強(qiáng)制同步到數(shù)據(jù)庫(kù)。</param> void Save(ISchema schema, bool force);/// <summary>/// 保存數(shù)據(jù)架構(gòu)。/// </summary>/// <param name="schema">架構(gòu)。</param>/// <param name="force">是否強(qiáng)制同步到數(shù)據(jù)庫(kù)。</param> /// <param name="transaction">數(shù)據(jù)同步過(guò)程中是否使用事務(wù)。</param>void Save(ISchema schema, bool force, bool transaction);/// <summary>/// 插入數(shù)據(jù)實(shí)體。/// </summary>/// <param name="entity">實(shí)體。</param>void Insert(IEntity entity);/// <summary>/// 修改數(shù)據(jù)實(shí)體。/// </summary>/// <param name="entity">實(shí)體。</param>void Update(IEntity entity);/// <summary>/// 刪除數(shù)據(jù)實(shí)體。/// </summary>/// <param name="entity">實(shí)體。</param>void Delete(IEntity entity);/// <summary>/// 刪除數(shù)據(jù)表。/// </summary>/// <param name="table">數(shù)據(jù)表。</param>/// <remarks>/// 本方法相當(dāng)于數(shù)據(jù)批量刪除，一次性刪除多條記錄。/// </remarks>/// <remarks>刪除的記錄數(shù)。</remarks> int Delete(ITable table);/// <summary>/// 根據(jù)條件刪除數(shù)據(jù)表中記錄。/// </summary>/// <param name="table">數(shù)據(jù)表。</param>/// <param name="condition">數(shù)據(jù)過(guò)濾條件。</param> /// <remarks>刪除的記錄數(shù)。</remarks>int Delete(ITable table, Condition condition);/// <summary>/// 刪除數(shù)據(jù)架構(gòu)。/// </summary>/// <param name="schema">架構(gòu)。</param>/// <remarks>/// 本方法相當(dāng)于數(shù)據(jù)批量刪除，一次刪除多表多條記錄。/// </remarks> void Delete(ISchema schema); /// <summary>/// 刷新數(shù)據(jù)實(shí)體。/// </summary>/// <param name="entity">實(shí)體。</param>/// <returns>數(shù)據(jù)庫(kù)中存在指定的數(shù)據(jù)體則返回true。</returns>bool Refresh(IEntity entity);/// <summary>/// 查詢數(shù)據(jù)實(shí)體。/// </summary>/// <param name="entity">實(shí)體。</param>/// <returns>數(shù)據(jù)庫(kù)中存在指定的數(shù)據(jù)體則返回true。</returns>bool Query(IEntity entity);/// <summary>/// 判讀實(shí)體是否存在于數(shù)據(jù)庫(kù)。/// </summary>/// <param name="entity">實(shí)體。</param>bool ExistsInDb(IEntity entity);/// <summary>/// 表查詢。/// </summary>/// <param name="table">表。</param>void Query(ITable table);/// <summary>/// 表查詢。/// </summary>/// <param name="table">表。</param> /// <param name="top">Top查詢。</param>void Query(ITable table,int top);/// <summary>/// 表查詢。/// </summary>/// <param name="table">表。</param>/// <param name="condition">數(shù)據(jù)查詢條件。</param>void Query(ITable table, Condition condition);/// <summary>/// 表查詢。/// </summary>/// <param name="table">表。</param>/// <param name="condition">數(shù)據(jù)查詢條件。</param>/// <param name="top">Top查詢。</param>void Query(ITable table, Condition condition, int top);/// <summary>/// 查詢數(shù)據(jù)表。/// </summary>/// <param name="table">表。</param>DataTable GetDataTable(ITable table);/// <summary>/// 查詢數(shù)據(jù)表。/// </summary>/// <param name="table">表。</param> /// <param name="top">Top查詢。</param>DataTable GetDataTable(ITable table, int top);/// <summary>/// 查詢數(shù)據(jù)表。/// </summary>/// <param name="table">表。</param>/// <param name="condition">數(shù)據(jù)查詢條件。</param>DataTable GetDataTable(ITable table, Condition condition);/// <summary>/// 查詢數(shù)據(jù)表。/// </summary>/// <param name="table">表。</param>/// <param name="condition">數(shù)據(jù)查詢條件。</param>/// <param name="top">Top查詢。</param>DataTable GetDataTable(ITable table, Condition condition, int top);} } ICacheAccessor完成ORM對(duì)象的緩存查詢及其輔助任務(wù)，其接口詳細(xì)定義如下： /// <summary>/// 緩存訪問器接口。/// </summary>/// <remarks>/// 為ORM對(duì)象提供緩存查詢能力。/// </remarks>public interface ICacheAccessor : IOrmEnvironment{/// <summary>/// 緩存刷新實(shí)體。/// </summary>/// <param name="entity">實(shí)體。</param>void CacheRefresh(IEntity entity);/// <summary>/// 表緩存查詢。/// </summary>/// <param name="table">表。</param>void CacheQuery(ITable table);/// <summary>/// 表緩存查詢。/// </summary>/// <param name="table">表。</param> /// <param name="top">Top查詢。</param>void CacheQuery(ITable table, int top);/// <summary>/// 表緩存查詢。/// </summary>/// <param name="table">表。</param>/// <param name="condition">數(shù)據(jù)查詢條件。</param>void CacheQuery(ITable table, Condition condition);/// <summary>/// 表緩存查詢。/// </summary>/// <param name="table">表。</param>/// <param name="condition">數(shù)據(jù)查詢條件。</param>/// <param name="top">Top查詢。</param>void CacheQuery(ITable table, Condition condition, int top);/// <summary>/// 緩存查詢數(shù)據(jù)表。/// </summary>/// <param name="table">表。</param>DataTable GetCacheDataTable(ITable table);/// <summary>/// 緩存查詢數(shù)據(jù)表。/// </summary>/// <param name="table">表。</param> /// <param name="top">Top查詢。</param>DataTable GetCacheDataTable(ITable table, int top);/// <summary>/// 緩存查詢數(shù)據(jù)表。/// </summary>/// <param name="table">表。</param>/// <param name="condition">數(shù)據(jù)查詢條件。</param>DataTable GetCacheDataTable(ITable table, Condition condition);/// <summary>/// 緩存查詢數(shù)據(jù)表。/// </summary>/// <param name="table">表。</param>/// <param name="condition">數(shù)據(jù)查詢條件。</param>/// <param name="top">Top查詢。</param>DataTable GetCacheDataTable(ITable table, Condition condition, int top);}
IOrmAccessor和ICacheAccessor都基于一個(gè)共同的接口IOrmEnvironment，IOrmEnvironment寓意為ORM操縱環(huán)境，根據(jù)類圖可以看到IOrmAccessor和ICacheAccessor也堅(jiān)決的繼續(xù)于接口ISessionResource（會(huì)話資源），關(guān)我在后面的文章中專門介紹。 關(guān)于IOrmAccessor和ICacheAccessor詳細(xì)方法和具體的實(shí)現(xiàn)思路我在本文暫時(shí)不做介紹，在AgileEAS.NET實(shí)現(xiàn)了基于本地?cái)?shù)據(jù)訪問器IDataAccessor的ORM實(shí)現(xiàn)，也實(shí)現(xiàn)了基于分布式WebService和Remoting的ORM訪問器實(shí)現(xiàn)，在開發(fā)和使用過(guò)程中，同一實(shí)體對(duì)象可以在不同的ORM訪問器中進(jìn)行切換，只需要修改配置文件： 使用本地?cái)?shù)據(jù)訪問器： <object name="MasterDbConnection" assembly="EAS.Data" type="EAS.Data.Access.OleDbConnection" LifestyleType="Singleton"><property name="ConnectionString" type="string" value="..." /> </object> <object name="OrmAccessor" assembly="EAS.Data" type="EAS.Data.ORM.OrmAccessor" LifestyleType="Singleton"><property name="DbConnection" type="object" value="MasterDbConnection" /> </object> <object name="CacheAccessor" assembly="EAS.Data" type="EAS.Data.ORM.CacheAccessor" LifestyleType="Singleton"> </object> 使用基于WebService實(shí)現(xiàn)的分布式訪問器： <object name="MasterDataAccessor" assembly="EAS.Distributed.WebServiceClient" type="EAS.Distributed.WebServiceClient.DataAccessor" LifestyleType="Singleton"><constructor-arg index="0" type="string" value="http://vm2003/Distributed/DataAccessService.asmx" /> </object> <object name="MasterRMIAccessor" assembly="EAS.Distributed.WebServiceClient" type="EAS.Distributed.WebServiceClient.RMIAccessor" LifestyleType="Singleton"><constructor-arg index="0" type="string" value="http://vm2003/Distributed/RMIService.asmx" /> </object> <object name="OrmTranser" assembly="EAS.Distributed.WebServiceClient" type="EAS.Distributed.WebServiceClient.OrmAccessor" LifestyleType="Singleton"><property name="DataAccessor" type="object" value="MasterDataAccessor" /><property name="RMIAccessor" type="object" value="MasterRMIAccessor" /> </object>
下一篇文章我簡(jiǎn)單說(shuō)一下數(shù)據(jù)實(shí)現(xiàn)和UI的綁帶。 QQ群：120661978,125643764 鏈接:AgileEAS.NET應(yīng)用開發(fā)平臺(tái)介紹 AgileEAS.NET之敏捷并行開發(fā)方法 敏捷軟件工程實(shí)驗(yàn)室

轉(zhuǎn)載于:https://blog.51cto.com/agilelab/561910

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