城堡拦截器不拦截

Question

I have a lot of code I want to add logging to. My plan was to use Unity or Castle.Windsor to create an intercepted logging routine, and to add it to existing code by using a custom C# attribute. I cannot change the existing code structure (but I can add startup configuration to it, so the container registration approach is OK).

This didn't look possible with Unity without changing the call structure (getting the intercepted class required changing the instantiation to use registered dependency injection), so I'm trying Castle.Windsor. This code I have is not firing the Intercept routine.

This gave me some hope that it will be possible in Castle.Windsor: Inject logging dependency with Castle Windsor

using System;
using Castle.Core;
using Castle.DynamicProxy;
using Castle.MicroKernel.Registration;
using Castle.Windsor;

namespace UnityTestProject
{
    class Program
    {
        private static WindsorContainer container;

        static void Main(string[] args)
        {
            container = new WindsorContainer();
            container.Register(Component.For<MyLogger>().LifeStyle.Transient);

            ICalcService c = new Calc();
            Console.WriteLine(c.Add(3,4));
            Console.ReadKey();
        }
    }

    public class MyLogger : IInterceptor
    {
        public void Intercept(IInvocation invocation)
        {
            Console.WriteLine("Inovaction called!");
            invocation.Proceed();
        }
    }

    public interface ICalcService
    {
        int Add(int x, int y);
    }

    public class Calc : ICalcService
    {
        [Interceptor(typeof(MyLogger))]
        public int Add(int x, int y)
        {
            return x + y;
        }
    }
}

Is there a better way for me to do this logging injection? PostSharp weaving would be ideal, but I cannot use it (expense and licensing).

Answer 1

changed main to :

container = new WindsorContainer();
container.Register(
    Component.For<ICalcService>().ImplementedBy<Calc>().Interceptors<MyLogger>(),
    Component.For<MyLogger>().LifeStyle.Transient);

ICalcService c = container.Resolve<ICalcService>();
Console.WriteLine(c.Add(3, 4));
Console.ReadKey();

And you can remove the interceptor attribute. If you want to do interception with windsor then Windsor must be allowed to created the component(s).