RIA Services Visual Studio 2010 Beta2 中的 Windsor IHandlerSelector

Question

我想使用 Windsor 实现多租户，但我不知道如何处理这种情况：

我在普通的 ASP.NET MVC 项目中成功使用了this 技术，并认为将其合并到 RIA 服务项目中会是类似的。

所以我使用了 IHandlerSelector，注册了一些组件并编写了一个 ASP.NET MVC 视图来验证它是否可以在普通的 ASP.NET MVC 环境中工作。确实如此！

下一步是创建一个 DomainService，它在构造函数中注入了一个 IRepository。此服务托管在 ASP.NET MVC 应用程序中。它实际上...有效：我可以从中获取数据到 Silverlight 应用程序。

示例 sn-p：

public OrganizationDomainService(IRepository<Culture> cultureRepository)
{
            this.cultureRepository = cultureRepository;
}

最后一步是看看它是否可以像多租户一样工作：它不能！奇怪的是： 使用某行代码并在日志文件中编写调试消息，我验证选择了正确的处理程序！但是这个处理程序似乎没有注入到 DomainService 中。我总是得到第一个处理程序（这是我的 SelectHandler 中的逻辑）

任何人都可以验证这种行为吗？注入在 RIA 服务中不起作用吗？还是我缺少一些基本的东西？？

开发环境：Visual Studio 2010 Beta2

提前致谢

Answer 1

看来我在我的 OrganizationDomainServiceFactory 中做了一件非常奇怪的事情。 不起作用的代码是这样的：

public DomainService CreateDomainService(Type domainServiceType, DomainServiceContext context  )
{
WindsorContainer container = new WindsorContainer(new XmlInterpreter(new ConfigResource("castle")));
IRepository<Culture> cultureRepository = container.Resolve<IRepository<Culture>>();
IRepository<Currency> currencyRepository = container.Resolve<IRepository<Currency>>();

DomainService ds = (DomainService)Activator.CreateInstance(domainServiceType, new object[] { cultureRepository,currencyRepository });

ds.Initialize(context);
return ds;
}

这显然是行不通的，因为创建了一个新容器（不应该发生）。

好的！所以我想我尝试使用 ServiceLocator 来获取对 Windsor Container 的引用（在 WindsorControllerFactory 中使用 - 这就是我在启动 ASP.NET MVC 应用程序时调用它的方式），并将代码更改为：

public DomainService CreateDomainService(Type domainServiceType, DomainServiceContext context  )
{
IRepository<Culture> cultureRepository = ServiceLocator.Current.GetInstance<IRepository<Culture>>();
IRepository<Currency> currencyRepository = ServiceLocator.Current.GetInstance<IRepository<Currency>>();

DomainService ds = (DomainService)Activator.CreateInstance(domainServiceType, new object[] { cultureRepository,currencyRepository });

ds.Initialize(context);
return ds;
}

你猜怎么着：它可以工作（！！！）它应该是多租户！

我唯一不知道的是：是否有另一种“注入”容器的方法（构造函数注入在这里似乎不起作用，编译器抱怨）

顺便说一句：将项目从 VS2010Beta2 移至 VS2010RC（支持 RIA 服务），但这不会影响结果！

Answer 2

是的，我已经看到了这个线程并且我已经实现了这个。 首先请记住，我在 Global.asax.cs 中使用了这一行来使 RIA 服务正常运行（托管在 ASP.NET MVC 视图中）

 routes.IgnoreRoute("{*allsvc}", new { allsvc = @".*\.svc(/.*)?" }); 

这里有一些代码：

public class HostBasedComponentSelector : IHandlerSelector
    {
        private readonly Type[] selectableTypes;

        public HostBasedComponentSelector(params Type[] selectableTypes)
        {
            this.selectableTypes = selectableTypes;
        }



        public bool HasOpinionAbout(string key, Type service)
        {
            foreach (var type in selectableTypes)
            {
                if (service == type) return true;
            }
            return false;
        }

        public IHandler SelectHandler(string key, Type service, IHandler[] handlers)
        {   
            //only for debug
            StreamWriter sw = new StreamWriter(@"c:\temp\Debug.log",true);
            sw.WriteLine(DateTime.Now + " " + service.Name + " " + GetHostname() );
            sw.WriteLine("Available handlers");
            foreach(IHandler h in  handlers )
            {
                sw.WriteLine ("Handler "+h.ComponentModel.Name);
            }

            var id = string.Format("{0}:{1}", service.Name, GetHostname());
            var selectedHandler = handlers.Where(h => h.ComponentModel.Name == id).FirstOrDefault() ??
                                  GetDefaultHandler(service, handlers);

            sw.WriteLine("Selected handler " + selectedHandler.ComponentModel.Name);
            sw.WriteLine("----------- END ----------");
            sw.Flush();
            sw.Close();


            return selectedHandler;
        }
        private IHandler GetDefaultHandler(Type service, IHandler[] handlers)
        {
            if (handlers.Length == 0)
            {
                throw new ApplicationException("No components registered for service {0} With service.Name" + service.Name);
            }
            return handlers[0];
        }

        protected string GetHostname()
        {
            return HttpContext.Current.Request.ServerVariables["SERVER_NAME"];
        }

    }

这是完整的 web.config。注意注册OrganizationDomainServiceFactory（就是你说的那篇文章的实现）

<?xml version="1.0"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=152368
  -->
<configuration>
  <configSections>
    <section name="castle" type="Castle.Windsor.Configuration.AppDomain.CastleSectionHandler,Castle.Windsor"/>
  </configSections>
  <connectionStrings>
    <add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient"/>
  </connectionStrings>
  <castle>
    <properties>
      <sqlConnStr>
        <!--metadata=res://*/WebShop.csdl|res://*/WebShop.ssdl|res://*/WebShop.msl;provider=System.Data.SqlClient;provider connection string="Data Source=.\SQLEXPRESS;Initial Catalog=iWebShop;User ID=sa;Password=xxx;MultipleActiveResultSets=True"-->
      </sqlConnStr>
    </properties>
    <components>          
      <component id="CommonObjectContext" service="TestRIA1.Abstract.IObjectContext, TestRIA1" type="TestRIA1.Concrete.ObjectContextAdapter, TestRIA1" lifestyle="PerWebRequest">
      </component>

      <component id="IConnectionStringProvider:test.gammasys.gr" service="TestRIA1.Abstract.IConnectionStringProvider, TestRIA1" type="TestRIA1.Concrete.ConnectionStringProvider, TestRIA1" lifestyle="transient">
        <parameters>
          <ConnectionString>
            metadata=res://*/WebShop.csdl|res://*/WebShop.ssdl|res://*/WebShop.msl;provider=System.Data.SqlClient;provider connection string="Data Source=.\SQLEXPRESS;Initial Catalog=iWebShop;User ID=sa;Password=xxx;MultipleActiveResultSets=True"
          </ConnectionString>
        </parameters>
      </component>

      <component id="IConnectionStringProvider:test.deltasys.gr" service="TestRIA1.Abstract.IConnectionStringProvider, TestRIA1" type="TestRIA1.Concrete.ConnectionStringProvider, TestRIA1" lifestyle="transient">
        <parameters>
          <ConnectionString>
            metadata=res://*/WebShop.csdl|res://*/WebShop.ssdl|res://*/WebShop.msl;provider=System.Data.SqlClient;provider connection string="Data Source=.\SQLEXPRESS;Initial Catalog=iWebShop2;User ID=sa;Password=xxx;MultipleActiveResultSets=True"
          </ConnectionString>
        </parameters>
      </component>

      <component id="Commonrepository" service="TestRIA1.Abstract.IRepository`1, TestRIA1"   type="TestRIA1.Concrete.Repository`1, TestRIA1" lifestyle="PerWebRequest"/>

      <component id="urlbased.handlerselector" service="Castle.MicroKernel.IHandlerSelector, Castle.MicroKernel" type="TestRIA1.HostBasedComponentSelector, TestRIA1" lifestyle="transient">
        <parameters>
          <selectableTypes>
            <array>
              <item>TestRIA1.Abstract.IConnectionStringProvider, TestRIA1</item>
            </array>
          </selectableTypes>
        </parameters>
      </component>

    </components>
  </castle>
  <system.web>
    <compilation debug="true" targetFramework="4.0">
      <assemblies>
        <add assembly="System.Web.Abstractions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add assembly="System.Web.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add assembly="System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
      </assemblies>
    </compilation>
    <authentication mode="Forms">
      <forms loginUrl="~/Account/LogOn" timeout="2880"/>
    </authentication>
    <membership>
      <providers>
        <clear/>
        <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/"/>
      </providers>
    </membership>
    <profile>
      <providers>
        <clear/>
        <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/"/>
      </providers>
    </profile>
    <roleManager enabled="false">
      <providers>
        <clear/>
        <add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/"/>
        <add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/"/>
      </providers>
    </roleManager>
    <pages>
      <namespaces>
        <add namespace="System.Web.Mvc"/>
        <add namespace="System.Web.Mvc.Ajax"/>
        <add namespace="System.Web.Mvc.Html"/>
        <add namespace="System.Web.Routing"/>
      </namespaces>
    </pages>

    <httpHandlers>
      <add verb="*" path="*.mvc" validate="false" type="System.Web.Mvc.MvcHttpHandler"/>

    </httpHandlers>
    <httpModules>
      <add name="PerRequestLifestyle" type="Castle.MicroKernel.Lifestyle.PerWebRequestLifestyleModule,Castle.MicroKernel " />
      <add name="DomainServiceModule" type="System.Web.Ria.Services.DomainServiceHttpModule, System.Web.Ria, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />

    </httpModules>
  </system.web>
  <system.webServer>
    <validation validateIntegratedModeConfiguration="false" />
    <modules runAllManagedModulesForAllRequests="true">
      <add name="DomainServiceModule" preCondition="managedHandler"
       type="System.Web.Ria.Services.DomainServiceHttpModule, System.Web.Ria, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
      <remove name="PerRequestLifestyle"/>
      <add name="PerRequestLifestyle" preCondition="managedHandler" type="Castle.MicroKernel.Lifestyle.PerWebRequestLifestyleModule,Castle.MicroKernel" />
      <!--to get IoC initialization of DomainService -->
      <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
      <add name="OrganizationDomainServiceFactory" type="TestRIA1.OrganizationDomainServiceFactory"/>
      <!-- End of IoC initial.....  -->

    </modules>
    <handlers>
      <remove name="MvcHttpHandler" />
      <add name="MvcHttpHandler" preCondition="integratedMode" verb="*"
       path="*.mvc" type="System.Web.Mvc.MvcHttpHandler" />
    </handlers>
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35"/>
        <bindingRedirect oldVersion="1.0.0.0" newVersion="2.0.0.0"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <system.serviceModel>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
  </system.serviceModel>
</configuration>

希望这已经足够了。如果您想要完整的项目，我可以向您发送一份副本（这是一个预生产测试项目）。

非常感谢您花费的时间！