在Unity中使用LogManager.GetLogger [英] Using LogManager.GetLogger with Unity

问题描述

提供此类:

class Foo
{
    readonly ILog log;

    public Foo(ILog log)
    {
        this.log = log;
    } 

    ...
}

我想配置Unity以注入ILog.很简单:

I'd like to configure Unity to inject ILog. That's easy:

container.RegisterInstance<ILog>(LogManager.GetLogger(typeof(XYZ)));

但是我想让Unity调用LogManager.GetLogger并解析父类型的类型.

But I'd like to make Unity call LogManager.GetLogger with the type of the parent type being resolved.

这很接近:

container.RegisterType<ILog>(new InjectionFactory((c, t, s) => LogManager.GetLogger(t)));

但是在这种情况下，t是要解析的类型(ILog)，而不是要解析对象的类型(Foo).

But t in this case is the type being resolved (ILog), not the type that the object is being resolved for (Foo).

我知道我可以做到:

container.RegisterType<Foo>(new InjectionFactory(c => new Foo(LogManager.GetLogger(typeof(Foo)));

但是我不想每次注册对象时都必须添加疯狂的声明.

But I don't want to have to add that crazy declaration every time I register an object.

我知道这可以在Autofac中完成，并且我知道真正的答案不是一开始就使用Unity，但是可以这样做吗? :)

I know this can be done in Autofac, and I know the Real Answer is not to use Unity in the first place, but can this be done? :)

推荐答案

Unity可能不会为您提供其他一些容器提供的所有好处，但是我还没有找到您无法轻松添加的功能.

Unity might not give you all the goodies some of the other containers offer but I have yet to find a feature you can't easily add.

var container = new UnityContainer();
container.AddNewExtension<TrackingExtension>();
container.RegisterType<ILog>(
  new InjectionFactory((ctr, type, name) =>
    {
      var tracker = ctr.Resolve<ITracker>();
      var parentType = tracker.CurrentBuildNode.Parent.BuildKey.Type;
      return LogManager.GetLogger(parentType);
    }));
var sut = container.Resolve<UsesLog>();
Assert.AreEqual(typeof(UsesLog), sut.Log.Type);

您可以在 ="em> TrackingExtension 此处找到源代码.它位于 TecX.Unity 项目文件夹中.

You can find the source code for the TrackingExtension here. Its located in the TecX.Unity project folder.

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