自动注册接口的派生类型

Question

我有一个接口ibbase，有许多派生接口IDerived1, IDerived2。我想使用Autofac注册派生接口的实现。

给定任何派生接口，我可以为该接口编写一个resolve方法。我想知道的是，在构建容器时，是否有任何方法可以避免枚举所有派生接口的列表?

我现在看到的是:

public static void Register<TDerived>(ContainerBuilder b) where TDerived : IBase {
    b.Register(cc => DerivedFactory.Create<TDerived>(cc.Resolve<SomeDependency>())
     .As<TDerived>()
     .InstancePerLifetimeScope();
}
// in my registration method
ContainerBuilder b = ...
MethodInfo genericRegisterDerivedMethod = this.GetType().GetMethod("Register", BindingFlags.Public | BindingFlags.Static);
List<Type> allDerivedInterfaces = /* query across various assemblies for interfaces which extend IBase */
allDerivedInterfaces.ForEach(t => genericRegisterDerivedMethod 
    .MakeGenericMethod(t)
    .Invoke(null, new object[] { b })
);

我想要的是:

public static void Create<TDerived>(IComponentContext cc) where TDerived : IBase {
    return DerivedFactory.Create<TDerived>(cc.Resolve<SomeDependency>());
}
// in my registration method
ContainerBuilder b = ...
MethodInfo genericResolveDerivedMethod = this.GetType().GetMethod("Create", BindingFlags.Public | BindingFlags.Static);
b.RegisterDerivedTypesOf<IBase>((cc, t) => (IBase)genericResolveDerivedMethod
    .MakeGenericMethod(t)
    .Invoke(null, new object[] { cc, t })
);

这将避免我在应用程序启动时需要知道完整的派生接口列表。这可能吗?

Answer 1

我能够使用自定义注册源来解决这个问题，它可以为请求的每个IDerived接口服务类型动态构建注册。