asp.net-web-api - 如何在 StructureMap ServiceActivator 中使用 Container 而不是 ObjectFactory？

Question

当使用 StructureMap 在 WebAPI 中实现 DI 时，我们使用了

中的 ServiceActivator

• Configuring Dependency Injection with ASP.NET WebAPI 2.1
• WebAPI + APIController with structureMap

<小时/>

public class ServiceActivator : IHttpControllerActivator
{
    public ServiceActivator(HttpConfiguration configuration) {}    

    public IHttpController Create(HttpRequestMessage request,
           HttpControllerDescriptor controllerDescriptor, Type controllerType)
    {
        var controller = ObjectFactory.GetInstance(controllerType) as IHttpController;
        return controller;
    }
}

但现在有了新的 StructureMap，我的 ReSharper 建议:

Class 'StructureMap.ObjectFactory' is obsolete: ObjectFactory will be removed in a future 4.0 release of StructureMap. Favor the usage of the Container class for future work

Container 上的智能感知只给了我非常有限的信息。

我们应该如何用Container类重写我们的ServiceActivator？

Answer 1

static stuff is going away 。如果您不使用某种类型的服务定位器，您将需要实现自己的“ObjectFactory”，如 referenced here :

public static class ObjectFactory
{
    private static readonly Lazy<Container> _containerBuilder =
            new Lazy<Container>(defaultContainer, LazyThreadSafetyMode.ExecutionAndPublication);

    public static IContainer Container
    {
       get { return _containerBuilder.Value; }
    }

     private static Container defaultContainer()
     {
        return new Container(x =>
        {
               // default config
         });
     }
}

更新:我之前的回答是错误的。感谢@JoeMighty 的提醒。