初始化log4net的尽早与NUnit的 [英] Initialize log4Net as early as possible with NUnit

问题描述

我想知道什么是在NUnit的项目初始化log4net的最好的方式。当然，我要调用的初始化代码（即 XmlConfigurator.Configure（）），只要我能得到尽可能多的早日志输出，我可以。但是，因为我的项目是通过NUnit的运行，我有它的入口点几乎没有控制。

I'm wondering what is the best way to initialize log4Net in a NUnit project. Of course I want to call the init code (ie. XmlConfigurator.Configure()) as soon as I can to get as many early log output as I can. But since my project is run through NUnit, I have little control on its entry point.

据NUnit的文档，它应该首先调用一些构造函数，然后打上一个方法在类 [设置] 属性标记 [TestFixtureSetup] 。

According to NUnit documentation, it should call some constructors first, then a method marked with the [SetUp] attribute in a class marked with [TestFixtureSetup].

所以，首先，我创建了一个静态辅助类，我可以叫了几次都没有麻烦。

So, First, I created a static helper class which I can call several times without trouble.

  public static class LoggingFacility
  {
    private static bool _loggerIsUp = false;

    public static void InitLogger()
    {
      if (_loggerIsUp == false)
        XmlConfigurator.ConfigureAndWatch(f);

      _loggerIsUp = true;
    }
  }

然后，我做了我所有的 [TestFixtureSetup] 继承一个单一，做几乎没有什么比别的调用 LoggingFacility.initLogger（）。但是仍然被前面跑，在订单我只能假设随机所有构造函数。而且，它可能会做一些静态初始化我甚至能够执行一些代码之前。

Then, I made all my [TestFixtureSetup] inherit a single one that does pretty much nothing else than calling LoggingFacility.initLogger(). But that still leaves all constructors that are run earlier, in an order I can only assume random. And moreover, it will probably do some static initializations before I am even able to execute some code.

事实上，我可以在我的日志中看到，第一4秒或因此执行的是完全没有记录。

In fact, as I can see in my log, the first 4 seconds or so of execution are completely unrecorded.

这是不是意味着我会打电话给我的 InitLogger（）每构造函数和禁止使用任何静态初始化的？这是艰难的工作！

Does it mean I will have to call my InitLogger() in every constructor and forbid the use of any static initializer? That's tough job!

是否有人知道一个魔术与此？

Does somebody know a magic trick with this?

推荐答案

一个工作伙伴向我提供了以下解决方法，完成这项工作：

A work mate provided me with the following workaround, that does the job:

在我所有的类需要记录，我有如下记录器初始化

In all my classes that require logging, I had the following logger initialization

private static readonly ILog Log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

我简单地将其改为单初始化

I simply changed it to a singleton initializer

private static readonly ILog Log = LoggingFacility.GetLoggerWithInit(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

/*** ... ***/

public static class LoggingFacility
{
  private static bool _loggerIsUp = false;

  public static ILog GetLoggerWithInit(Type declaringType)
  {
    if (_loggerIsUp == false)
      XmlConfigurator.Configure(_log4NetCfgFile);
    _loggerIsUp = true;
    return LogManager.GetLogger(declaringType);
  }
}

由于我在每一个类的代码，这种静态。初始化必须由NUnit的诡计很早就叫我实例化测试类

Because I have this code in every class, this static initializer has to be called very early by NUnit wile instantiating my test classes.

下一步是使线程安全的：（

Next step is to make that thread safe :(

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