第九回　Microsoft.Practices.Unity.Interception实现基于数据集的缓存（针对六，七，八讲的具体概念和配置的解说）

时间：2022-03-31 15:59:43

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概念

Microsoft.Practices.Unity.Interception是一个拦截器，它隶属于Microsoft.Practices.Unity组成之中，主要完成ＡＯＰ的功能，而实现ＡＯＰ方法拦截（页向切面）的基础就是IoC，我们需要配置相关接口或者类型的IoC方式，然后在生产对象时，使用Unity的方法进行动态生产对象，这时，你的Interception拦截器也会起作用！

相关技术

IoC: 控制反转（Inversion of Control，英文缩写为IoC）是一个重要的面向对象编程的法则来削减计算机程序的耦合问题。 控制反转一般又被称为依赖注入（Dependency Injection，简称DI）。即将配置中的对象，动态注入到项目程序当中，使程序的某个功能可以动态进行切换。

AOP: 面向切面编程(也叫面向方面编程)：Aspect Oriented Programming(AOP)，是软件开发中的一个热点。利用AOP可以对业务逻辑的各个部分进行隔离，从而使得业务逻辑各部分之间的耦合度降低，提高程序的可重用性，同时提高了开发的效率。

一般用它来实现：日志记录，性能统计，安全控制，事务处理，异常处理等等。

持久化方式

目前我的Project.UnityCaching组件支持Microsoft.Practices.EnterpriseLibrary.Caching和Redis两种数据持久化的方式，前者也是Microsoft.Practices. EnterpriseLibrary企业库的一部分，主要实现内存持久化（也可以实现文件持久化），主要用在单台ＷＥＢ服务器上；后者可以单独部署到一台或者多台服务器上，主要实现分布式缓存，它是未来的大数据的一个方向。

键名组成

缓存解决方案名_命名空间_方法名，其中缓存解决方案名可以自己去配置，对应config中的CacheProjectName节点，而键对应的值采用字典类型，字典的键对应方法的各参数的组合。

涉及到的相关程序集

IoC基础库程序集

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Redis基础库程序集

aaarticlea/png;base64,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" alt="" />

Project.Frameworks自封装程序集

aaarticlea/png;base64,iVBORw0KGgoAAAANSUhEUgAAASsAAABDCAIAAABLFrRgAAAFQUlEQVR4nO2cwW7qRhSG06foK/AEXfcxItHHyKZrJNaQZSXeABQQQrKcRKkascmmK19dNapuVelW7aZNDDbgGdtd0FqJZzwzxwyMr/m/FTHjc/4zPr8N94pzkQMA3HHhWgAAZw3BgT8qSZLkeCoBaCs0B3LGOGdpytOUZ1maZSnnLMvSp6cn3/dX69XxhALQSggOfHh4YCwRTZhl6XK5jOP49vY2DMPjaQWgfRAceH9/nyQ7qQl93/c8z/M83/ePpxWA9kFw4N3dXbLbJsmOMzZ+DDrd4c3y42a73Zvwj8+ff/v0CQ4EgATBgb7v77YbzlinO0xT/hzmz2He6Q6zLC0ehp7nlRO8oY6+WmepAxYx1apqpK5RbNVii4UXKURth1waYAXC1nuet93E48cgTfk8+Kvz7XcfXvKff49ulh8VDszfNNNprrQ2S2096vWlzrYV1gpqbXCgQwhbv1gsNnHc6Q6fw/yrr79Jdrubx+CXv6NOd5jy/74TLhYLSY7zc6DFsFaAAxsLYevn83kcRePHYP/584ebnz78+U9vGlxeXfemQcpZmvL5fC7J8f6jTulDUWmZeKLJkVJwQ6uUPpuZiJEmUietoVn6pyKOol5p8KoNAaeHsPWz2Sxer+Mo6nSHv67z5zDvTYNOd5gw3ukOe9OAczabzSQ5ZJdcbCbpYmnrKF5I01XpocZRa5bmNcllkt3wLG12k7rAKSFs/WQyiVaraL2Oo/X+30Ivr64TxnvTIGH88uqaMzaZTCQ5DC65oQPFp4dJOm2uQxyodYJWcz0HFpGlSc0jK5SDE0DY+vF4vA7DwoSbOCo9AxlLxuOxJIc9B2rjVB1U56rdqVXWIj2yDnwGKoADmw9h60ej0SoM35kwiorvgfv/KhyNRuUEsu8h0pt31cEa0Uyek28XFH+WXmhFauW9PajIqM6uXmNSqRTxXfF0cGwImz4YDFavr6vw9X8TrvYm3MTxdrPZbTfJbjsYDCzra3ZbOJSnuBGALwjClev3++HLS2HCtcyE/X7fjqzG35WbIK/5uwS0EC7e92YcTysA7QO3TwBcAgcC4BI4EACXwIEAuAQOBMAlcCAALiE4ELPSALAOzYGYlQaAXQgOxKw0AKxDcCBmpQFgHYIDMSsNAOsQHNimWWlaSeayq35SJD0CQAlCc7RmVpp2DfWHP+r1cCBQQGiO1sxK066h6oQDQW0IzdGaWWk5Zd6ENo5YhTYXAAWE5mjNrDRFluLWoI1gnh0OBAoIzdGaWWmKLHAgODGE5mjNrDRFFtGBimhwIDgcQnO0Y1baxXuqspt8wROjlSJX5QKggNAWmJUGgHUI/Y1ZaQBYB7PSAHAJHjIAuAQOBMAlcCAALoEDAXAJHAiAS+BAAFyCWWkAuASz0gBwCWalAeASzEoDwCWYlQaASzArraFQtZkUdUjJR90r8fdcpbeafKUOhFDY+cxKM19jCyu5TPa5sa2s/ilmY2UfDqGw85mVZr7GFnAgHKinrbPSpJ/fpHHMq6iqyzCXtIQacUzkVUVW1Gi4G1KRItJCxDWKCF80hMLOZ1aa4RqTKmprthLZ1gtDPYprV0W93WgThMLOZ1Za1Rpt9qp7jfSs0zjQMLu4Rm0ndcBSZPG4Io40FByY5+c0K02rxMqR0zhQm13hyXp6REzeggP1tHVWmvi6SlLVWSSFJuWbFCUqUZylrlQ8VxGEKlgRVlwmFqIorR0QSsKsNCu0ryJwCIRuwKy0w2lrXaA2hFbArDQArIObMQAugQMBcAkcCIBL4EAAXAIHAuCSfwEYCY3W03Ll/QAAAABJRU5ErkJggg==" alt="" />

配置文件中进行对IoC,AoP的配置

  <configSections>

    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->

    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />

    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />

    <section name="cachingConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Caching.Configuration.CacheManagerSettings, Microsoft.Practices.EnterpriseLibrary.Caching, Version=5.0.505.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />

    <section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Microsoft.Practices.Unity.Configuration"  />

    <section name="RedisConfig" type="Redis.Client.RedisConfigInfo, Redis.Client"/>

  </configSections>

  <RedisConfig WriteServerList="127.0.0.1:6379" ReadServerList="127.0.0.1:6379" MaxWritePoolSize="" MaxReadPoolSize="" AutoStart="true" LocalCacheTime="" RecordeLog="false">

  </RedisConfig>

  <cachingConfiguration defaultCacheManager="ByteartRetailCacheManager">

    <cacheManagers>

      <add name="ByteartRetailCacheManager" type="Microsoft.Practices.EnterpriseLibrary.Caching.CacheManager, Microsoft.Practices.EnterpriseLibrary.Caching, Version=5.0.505.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" expirationPollFrequencyInSeconds="" maximumElementsInCacheBeforeScavenging="" numberToRemoveWhenScavenging="" backingStoreName="NullBackingStore" />

      <!--

          expirationPollFrequencyInSeconds:过期时间(seconds)

          maximumElementsInCacheBeforeScavenging:缓冲中的最大元素数量

          numberToRemoveWhenScavenging：一次移除的数量

      -->

    </cacheManagers>

    <backingStores>

      <add type="Microsoft.Practices.EnterpriseLibrary.Caching.BackingStoreImplementations.NullBackingStore, Microsoft.Practices.EnterpriseLibrary.Caching, Version=5.0.505.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" name="NullBackingStore" />

    </backingStores>

  </cachingConfiguration>

  <unity xmlns="http://schemas.microsoft.com/practices/2010/unity">

    <sectionExtension type="Microsoft.Practices.Unity.InterceptionExtension.Configuration.InterceptionConfigurationExtension, Microsoft.Practices.Unity.Interception.Configuration" />

    <container>

      <!--泛型类型注入,数据仓储服务注入，可以由ef,linq,ado,memory,file,nosql等方式实现-->

      <register type="IRepository.Core.IUnitOfWork,IRepository.Core" mapTo="NLayer_IoC_Demo.Entity.backgroundTestIoCEntities,NLayer_IoC_Demo.Entity" />

      <!--使用redis作为持久化存储-->

      <!--<register type="IRepository.Core.IRepository`1,IRepository.Core" mapTo="Redis.Data.Core.RedisRepository`1,Redis.Data.Core" />-->

      <!--使用SQLSERVER作为持久化存储-->

      <register type="IRepository.Core.IRepository`1,IRepository.Core" mapTo="NLayer_IoC_Demo.DATA.backgroundRepositoryBase`1,NLayer_IoC_Demo.DATA" />

      <register type="IRepository.Core.IExtensionRepository`1,IRepository.Core" mapTo="NLayer_IoC_Demo.DATA.backgroundRepositoryBase`1,NLayer_IoC_Demo.DATA" />

      <!-- AOP注入 -->

      <extension type="Interception" />

      <register type="NLayer_IoC_Demo.BLL.IUserService,NLayer_IoC_Demo.BLL" mapTo="NLayer_IoC_Demo.BLL.UserService,NLayer_IoC_Demo.BLL" >

        <!--接口拦截-->

        <interceptor type="InterfaceInterceptor" />

        <!--缓存注入-->

        <interceptionBehavior type="Project.UnityCaching.CachingBehavior,Project.UnityCaching"/>

      </register>

      <register type="NLayer_IoC_Demo.BLL.OrderService,NLayer_IoC_Demo.BLL" >

        <!--接口拦截-->

        <interceptor  type="VirtualMethodInterceptor" />

        <!--虚方法注入，生成派生类进行拦截，让我们省去了建立接口的时间，不错的选择-->

        <!--Transparent Proxy Interceptor -->

        <!--它是注入所有的virutal method ,method,interface，但它的性能太差了-->

        <!--缓存注入-->

        <interceptionBehavior type="Project.UnityCaching.CachingBehavior,Project.UnityCaching"/>

      </register>

      <register type="Project.InterceptionBehaviors.IHandle, Project.InterceptionBehaviors" mapTo="Project.InterceptionBehaviors.StandardHandle, Project.InterceptionBehaviors">

        <!--接口拦截-->

        <interceptor type="InterfaceInterceptor" />

        <interceptionBehavior  type="NLayer_IoC_Demo.BLL.AOP.LoggerBehavior,NLayer_IoC_Demo.BLL" />

      </register>

    </container>

  </unity>

  <connectionStrings>

    <add name="backgroundTestIoCEntities" connectionString="metadata=res://*/background.csdl|res://*/background.ssdl|res://*/background.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=.;initial catalog=backgroundTestIoC;persist security info=True;user id=sa;password=zzl123;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />

    <add name="DefaultConnection" connectionString="Data Source=(LocalDb)\v11.0;Initial Catalog=aspnet-NLayer_IoC_Demo-20141024091423;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnet-NLayer_IoC_Demo-20141024091423.mdf" providerName="System.Data.SqlClient" />

  </connectionStrings>

使用时的相关注意要点

  1. Unity组件中引入了服务定位器ServiceLocator的概念，它可以使我们不引用目标程序集，而自动在bin目录自动去定位。
  2. 对于Redis方式的缓存来说，进行缓存的实体类需要被声明为Serializable特性。
  3. 实现IoC，AoP时，只引用需要的程序集，而不用将所有Microsoft.Practices.Unity组件都引入，在程序进行编译时，这些需要的程序集会自动添加到UI项目的BIN目录。
  4. 方法拦截这块有三种，但TransparentProxyInterceptor由于性能太差，我们并不提倡使用，项目中我们主要使用VirtualMethodInterceptor对于虚方法的拦截和InterfaceInterceptor对于接口的拦截，两种方式各有好处，如果实现方式比较单一，可以直接使用虚方法注入，这样可以省去写接口的代码量。

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