如何设置 Unity 容器来创建模拟/真实记录器实例

发布于 2024-10-15 03:49:42 字数 596 浏览 4 评论 0原文

我现在很困惑，也许不明白真正的问题。

我有一个需要记录器实例来记录错误数据的对象。

例如

public class CommonFileSaver : IFileSaver
    {
           private static ILog _log = LogManager.GetLogger();

           .....
    }

我想测试日志记录过程。而我目前的决定是使用 ILog 接口的模拟。

此时我决定使用Unity来解决依赖关系。

所以该行

ILog _log = LogManager.GetLogger();

看起来像这样：

ILog _log = Resolver.Instance.Resolve<ILoger>();

问题是如何设置 Unity 容器以使用 LogManager 工厂返回 ILog 对象的新实例。

谢谢。

PS ILog 是 log4net 接口，现在整个日志记录都是使用 log4net 实现的。

原文

I am confused right now, and maybe does not understand the real problem.

I have an object which require logger instance to log error data.

for example

public class CommonFileSaver : IFileSaver
    {
           private static ILog _log = LogManager.GetLogger();

           .....
    }

I wish to test the logging process. And my current decission is to use the mock of the ILog interface.

At this point I have decided to use Unity to resolve dependencies.

So the line

ILog _log = LogManager.GetLogger();

will look something like

ILog _log = Resolver.Instance.Resolve<ILoger>();

The question is how to setup the Unity container to return me new instance of the ILog object using LogManager factory.

Thank you.

P.S. ILog is the log4net interface, and the whole logging thing is implemented using log4net right now.

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甜嗑 2024-10-22 03:49:42

也许设计上不正确，但是在Unity中使用工厂是可能的......

_container = new UnityContainer();
_container.RegisterType<ILog>(new InjectionFactory(c => LogManager.GetLogger()));

Maybe it is not correct in design, but using factory is possible in Unity...

_container = new UnityContainer();
_container.RegisterType<ILog>(new InjectionFactory(c => LogManager.GetLogger()));

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独享拥抱 2024-10-22 03:49:42

这里的问题是你没有遵循好莱坞原则。静态工厂方法和单例不太适合依赖注入。您应该更改代码以注入 ILog 工厂：

public class CommonFileSaver : IFileSaver
{
   public CommonFileSaver(ILogFactory logFactory)
   {
      _log = logFactory.GetLogger();
   } 

   private readonly ILog _log;

   .....
}

The problem here is that you're not following the Hollywood principle. Static factory methods and singletons don't fit well with dependency injection. You should change your code, to inject your ILog factory:

public class CommonFileSaver : IFileSaver
{
   public CommonFileSaver(ILogFactory logFactory)
   {
      _log = logFactory.GetLogger();
   } 

   private readonly ILog _log;

   .....
}

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