我正在更新使用AutoFac的遗留项目,我想将NLog与简单记录外观(SLF)一起使用
我在过去和Ninject一起使用它,它很容易设置,我只需要做类似的事情：
kernel.Bind<ILogger>().ToMethod(x => LoggerFactory.GetLogger(x.Request.Target.Member.ReflectedType));
输出将是这样的：
NLogNinjectSlf.Services.MyService 2013-12-30 15:21:10.5782 DEBUG Log from injected Logger
小菜一碟
但现在我必须使用AutoFac,我不知道如何获得需要记录器的Target类型
例如,如果我有以下接口/类：
public interface IMyService
{
void DoSomething();
}
public class MyService : IMyService
{
private readonly ILogger _logger;
public MyService(ILogger logger)
{
_logger = logger;
}
public void DoSomething()
{
_logger.Debug("Log from injected Logger");
}
}
我希望能够获取MyService类的类型,将其用作记录器的名称
在AutoFac中,这是我到目前为止所尝试的：
var containerBuilder = new ContainerBuilder();
containerBuilder.RegisterType<MyService>().As<IMyService>();
containerBuilder.Register(x =>
{
// TODO: Get the correct type
return LoggerFactory.GetLogger(x.GetType());
}).As<ILogger>();
顺便说一句：我在SLF4Net后面使用NLog并不是真正需要解决主要问题的……
解决方法
谢谢
nemesv对我帮助很大
这是我最终使用的代码
BTW.您可以根据需要删除注入属性的代码,然后在所有类中使用DI来注入可提高性能的ILogger
public class LoggingModule : Module
{
protected override void AttachToComponentRegistration(IComponentRegistry componentRegistry,IComponentRegistration registration)
{
registration.Preparing += OnComponentPreparing;
registration.Activated += (sender,e) => InjectLoggerProperties(e.Instance);
}
private static void InjectLoggerProperties(object instance)
{
var instanceType = instance.GetType();
// Get all the injectable properties to set.
// If you wanted to ensure the properties were only UNSET properties,// here's where you'd do it.
var properties = instanceType
.GetProperties(BindingFlags.Public | BindingFlags.Instance)
.Where(p => p.PropertyType == typeof(ILogger) && p.CanWrite && p.GetIndexParameters().Length == 0);
// Set the properties located.
foreach (var propToSet in properties)
{
propToSet.SetValue(instance,LoggerFactory.GetLogger(instanceType),null);
}
}
private void OnComponentPreparing(object sender,PreparingEventArgs e)
{
var t = e.Component.Activator.LimitType;
e.Parameters = e.Parameters.Union(
new[]
{
new ResolvedParameter((p,i) => p.ParameterType == typeof (ILogger),(p,i) => LoggerFactory.GetLogger(t))
});
}
}
然后注册模块：
containerBuilder.RegisterModule<LoggingModule>();
