Castle Windsor：当程序集无法访问基础类型时，如何注册工厂方法？ [英] Castle Windsor: How do I register a factory method, when the underlying type isn't accessible to my assembly?

问题描述

我有一个项目，其中的业务层是使用DI构建的，但是我想进一步尝试使用Windsor来管理对象的构建。

I have a project where my business layer is constructed using DI, but I'm trying to go an additional step and use Windsor to manage object construction.

只是说我有一个预先存在的数据层（我不想修改），可以通过以下界面进行访问：

Let's just say I have a pre-existing data layer (that I don't want to modify), that can be accessed via the following interface:

interface IDataFactory {
   IDataService Service { get; }
}

我的业务层中的一系列类取决于通过IDataFactory公开的服务：

A series of classes in my business layer depend on the services exposed through IDataFactory:

IFactory factory = DataFactory.NewFactory();
IBusinessService service = new ConcreteBusinessService(factory.Service);

我知道，为了将IBusinessService注册到温莎城堡容器，我将使用类似于

I understand that in order to register IBusinessService to the Castle Windsor container, I'd use code similar to this:

IWindsorContainer container = new WindsorContainer();
container.AddComponent("businessService", typeof(IBusinessService), typeof(ConcreteBusinessService));

但是对于我一生来说，我不知道如何从数据层注册服务，使用我现有的工厂对象。本质上，我想说：

But for the life of me, I can't figure out how to register services from my data layer, using the my existing factory object. In essence, I'd like to say:

container.AddComponent("dataService", typeof(IDataService), factory.service);

温莎似乎要我说 container.AddComponent（ dataService，typeof（IDataService ），typeOf（SomeConcreteDataService）），但在这种情况下，ConcreteDataService在该程序集内部，因此在我的程序集中无法访问。

Windsor seems to want me to say container.AddComponent("dataService", typeof(IDataService), typeOf(SomeConcreteDataService)), but in this instance, ConcreteDataService is internal to that assembly, and thus not accessible in mine.

鉴于我的程序集不知道SomeConcreteDataService，该如何连接数据服务？

How would I go about wiring up the data service, given that SomeConcreteDataService isn't known to my assembly?

这个问题非常类似于我自己的，除了在我的例子中，AddComponent（ calculator，typeof（ICalcService），typeof（CalculatorService）， Create）;调用将无法正常工作-CalculatorService将在另一个程序集内部，而不是用于将容器连接到容器的程序集。

This question is very similar to my own, except in my case, the AddComponent("calculator", typeof(ICalcService), typeof(CalculatorService), "Create"); call wouldn't work -- CalculatorService would be internal to another assembly, not available to the assembly wiring up the container.

推荐答案

使用Windsor 2.0：

Using Windsor 2.0:

[TestFixture]
public class WindsorTests {
    public interface IDataService {}

    public class DataService: IDataService {}

    public interface IDataFactory {
        IDataService Service { get; }
    }

    public class DataFactory: IDataFactory {
        public IDataService Service {
            get { return new DataService(); }
        }
    }

    [Test]
    public void FactoryTest() {
        var container = new WindsorContainer();
        container.AddFacility<FactorySupportFacility>();
        container.AddComponent<IDataFactory, DataFactory>();
        container.Register(Component.For<IDataService>().UsingFactory((IDataFactory f) => f.Service));
        var service = container.Resolve<IDataService>();
        Assert.IsInstanceOfType(typeof(DataService), service);
    }
}

请参见流利的API Wiki页面。

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