Question

当在httprequest的末尾处理嵌套容器时，处理对象实例被调用两次。但是，控制器配置一次正确调用。以下是有关问题的详细信息。请建议。

运行Webapi + Owin
Startup.cs var registry = new Registry（）; registry.IncludeRegistry（）; registry.IncludeRegistry（）; var container = new Container（registry）; config.Services.Replace（typeof（IHttpControllerActivator），新的ServiceActivator（容器））;

3. WebAPI的服务激活器

public class ServiceActivator : IHttpControllerActivator
 {
     private readonly IContainer _container;
     public ServiceActivator(IContainer structureMapContainer)
     {
        _container = structureMapContainer;
     }

     public IHttpController Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)
     {
        var nested = _container.GetNestedContainer();
        var instance = nested.GetInstance(controllerType) as IHttpController;
        request.RegisterForDispose(nested);
        return instance;
      }
   }

4控制器注册管理机构公约

 public class ControllerConvention : IRegistrationConvention
 {
    public void Process(Type type, Registry registry)
    {
        if (type.CanBeCastTo(typeof(ApiController)) && !type.IsAbstract)
        {
            registry.For(type).LifecycleIs(new UniquePerRequestLifecycle());
        }
    }
 }

5.Repository Registry Convention（）

 public class RepositoryConvention : IRegistrationConvention
 {
    public void Process(Type type, Registry registry)
    {
        if (!type.IsAbstract)
        {
            registry.For(type).LifecycleIs(new UniquePerRequestLifecycle());
        }
    }
}

6。 RepositoryRegistry

public class RepositoryRegistry : Registry
   {
    public RepositoryRegistry()
    {
        Scan(scan =>
        {
           scan.TheCallingAssembly();


           //DISPOSE ON EventStoreHandler GETTING CALLED TWICE AT THE END OF  THE REQUEST
           For<IEventStoreHandler>().Add<EventStoreHandler>().Named("Default");
           For<IEventStoreHandler>().Add<EventStoreHandlerB>().Named("CustomerB");

 //scan.WithDefaultConventions();  //DISPOSE ON EventStoreHandler GETTING  CALLED ONCE  AS EXPECTED AT THE END OF THE REQUEST
           For<IEventStoreHandler>().Use("Default"); //Default

            scan.With(new RepositoryConvention());
        });
    }
  }

如果我使用scan.WithDefaultConventions（），则调用EventStoreHandler Dispose一次（如预期的那样）。但是，我不想使用WithDefaultConventions。使用其他任何东西都会调用dispose两次。

Answer 1

解决方案：

For<IEventStoreHandler>().Add<EventStoreHandlerB>().Named("CustomerB");
For<IEventStoreHandler>().Add<EventStoreHandler>().Named("Default");  

//This line fixed it       
For<IEventStoreHandler>().Use<EventStoreHandler>().Ctor<IEventStoreHandler>().Is(i => i.GetInstance<IEventStoreHandler>("Default"));

使用嵌套容器时，结构图调用多次处理

1 个答案: