Question

我想将ILog注入我的类，而不是ILoggerFactoryAdapter，但ILoggerFactoryAdapter需要调用类的名称（想要记录某些东西的类，所以我可以正确分类）所以Autofac可以以某种方式识别类请求ILog并从工厂自动创建ILog？

Answer 1

Bailey Ling想出了一个不使用堆栈行走的好方法 - 请参阅此处的帖子：http://groups.google.com/group/autofac/msg/704f926779cbe8b3

Answer 2

我也试过这样做，但是我找不到一种方法来访问autofac的激活堆栈（没有修补它）来获取要用logger实例注入的类型。 / p>

以下是“我的机器上的工作”认证方式（Autofac-1.4.3.536）

protected override void Load(ContainerBuilder builder)
        {
            const string loggerName = "Logger.Name";

            builder.
                Register((c, p) => LogManager.GetLogger(p.Named<string>(loggerName))).
                OnPreparing((c, p) =>
            {
                var stack = p.Context.GetActivationStack();
                var requestingType = "default";
                if (stack != null && stack.Length > 1) requestingType = stack[1].Description;
                var parameters = new List<Parameter>(p.Parameters) { new NamedParameter(loggerName, requestingType) };
                p.Parameters = parameters;

            }).
            FactoryScoped();
}

static class ContextExtensions
{
    public static Autofac.Service[] GetActivationStack(this Autofac.IContext context)
    {
        const string notSupportedMessage = "GetActivationStack not supported for this context.";

        var type = context.GetType();
        if (type.FullName != "Autofac.Context") throw new NotSupportedException(notSupportedMessage);

        var field = type.GetField("_componentResolutionStack", BindingFlags.Instance | BindingFlags.NonPublic);
        if (field == null) throw new NotSupportedException(notSupportedMessage);

        var activationStack = field.GetValue(context) as Stack<Autofac.Service>;
        if (activationStack == null) throw new NotSupportedException(notSupportedMessage);

        return activationStack.ToArray();
    }
}

具有Common.Logging和Autofac的自动工厂？

2 个答案: