确定解决实例的依赖关系 - IoC (autofac)
Identify the dependency resolving an instance - IoC (autofac)
有没有办法确定哪个 caller/dependency 正在解析它所依赖的实例?这就是我的想法
public class A
{
public A()
{
Console.Write("I am being resolved by {0}");
}
}
public class B
{
public B(A a)
{
//Should print: A being resolved by B
}
}
public class C
{
public C(A a)
{
//Should print: A being resolved by C
}
}
我猜测对于在多个依赖项之间共享的单个实例可能有点棘手,但我专门寻找每个依赖项解析的实例,因此在上面的示例中将有两个 B 实例。
FWIW,我的 IoC 容器是 Autofac,它是 运行 在 MVC 网络应用程序的上下文中
您可以使用 ResolveOperationBegging
和 InstanceLookupBeginning
事件
ContainerBuilder builder = new Autofac.ContainerBuilder();
builder.RegisterType<A>().AsSelf();
builder.RegisterType<B>().AsSelf();
builder.RegisterType<C>().AsSelf();
IContainer container = builder.Build();
EventHandler<LifetimeScopeBeginningEventArgs> lifetimeScopeBeginning = null;
lifetimeScopeBeginning = (sender, e) =>
{
e.LifetimeScope.ResolveOperationBeginning += (sender2, e2) =>
{
List<IInstanceActivator> activators = new List<IInstanceActivator>();
e2.ResolveOperation.InstanceLookupBeginning += (sender3, e3) =>
{
activators.Add(e3.InstanceLookup.ComponentRegistration.Activator);
Console.WriteLine("Activation Path : {0}", String.Join(" => ", activators.Select(a => a.LimitType.Name).ToArray()));
};
};
e.LifetimeScope.ChildLifetimeScopeBeginning += lifetimeScopeBeginning;
};
container.ChildLifetimeScopeBeginning += lifetimeScopeBeginning;
using (ILifetimeScope scope = container.BeginLifetimeScope())
{
scope.Resolve<C>();
}
此代码将显示
Activation Path : C
Activation Path : C => B
Activation Path : C => B => A
有没有办法确定哪个 caller/dependency 正在解析它所依赖的实例?这就是我的想法
public class A
{
public A()
{
Console.Write("I am being resolved by {0}");
}
}
public class B
{
public B(A a)
{
//Should print: A being resolved by B
}
}
public class C
{
public C(A a)
{
//Should print: A being resolved by C
}
}
我猜测对于在多个依赖项之间共享的单个实例可能有点棘手,但我专门寻找每个依赖项解析的实例,因此在上面的示例中将有两个 B 实例。
FWIW,我的 IoC 容器是 Autofac,它是 运行 在 MVC 网络应用程序的上下文中
您可以使用 ResolveOperationBegging
和 InstanceLookupBeginning
事件
ContainerBuilder builder = new Autofac.ContainerBuilder();
builder.RegisterType<A>().AsSelf();
builder.RegisterType<B>().AsSelf();
builder.RegisterType<C>().AsSelf();
IContainer container = builder.Build();
EventHandler<LifetimeScopeBeginningEventArgs> lifetimeScopeBeginning = null;
lifetimeScopeBeginning = (sender, e) =>
{
e.LifetimeScope.ResolveOperationBeginning += (sender2, e2) =>
{
List<IInstanceActivator> activators = new List<IInstanceActivator>();
e2.ResolveOperation.InstanceLookupBeginning += (sender3, e3) =>
{
activators.Add(e3.InstanceLookup.ComponentRegistration.Activator);
Console.WriteLine("Activation Path : {0}", String.Join(" => ", activators.Select(a => a.LimitType.Name).ToArray()));
};
};
e.LifetimeScope.ChildLifetimeScopeBeginning += lifetimeScopeBeginning;
};
container.ChildLifetimeScopeBeginning += lifetimeScopeBeginning;
using (ILifetimeScope scope = container.BeginLifetimeScope())
{
scope.Resolve<C>();
}
此代码将显示
Activation Path : C
Activation Path : C => B
Activation Path : C => B => A