正如Dan 所建议的,这可以使用自定义ComponentModel 构造贡献者来实现。
首先,请注意
...
.Interceptors(InterceptorReference.ForType<DummyInterceptor>())
.SelectedWith(new FooInterceptorSelector())
.Anywhere
基本上相当于
...
.SelectInterceptorsWith(new FooInterceptorSelector())
.Interceptors(InterceptorReference.ForType<DummyInterceptor>())
.Anywhere
也就是说,将IInterceptorSelector
a 与 a关联ComponentModel
独立于注册拦截器,这些拦截器将使用IInterceptorSelector
. 此外,每个ComponentModel
可能只有一个拦截器选择器。
由于这种分离,问题最好使用两个独立的贡献者来解决——一个用于注册拦截器,另一个用于注册拦截器选择器。
第一个与丹的答案中显示的基本相同。但是,不需要DependencyModel
为拦截器添加一个,因为拦截器应该已经使用类似的东西注册到容器中
container.Register(Component.For<DummyInterceptor>().LifestyleTransient());
所以它看起来像
using Castle.Core;
using Castle.MicroKernel;
using Castle.MicroKernel.ModelBuilder;
...
public class InterceptorContributor : IContributeComponentModelConstruction
{
private readonly InterceptorReference interceptor;
public InterceptorContributor(InterceptorReference interceptor)
{
this.interceptor = interceptor;
}
public void ProcessModel(IKernel kernel, ComponentModel model)
{
if (...)
{
model.Interceptors.Add(interceptor)
}
}
}
或者如果您希望能够一次性注册多个拦截器,则可以利用现有的实现InterceptorDescriptor
,而不是:
using System;
using Castle.Core;
using Castle.MicroKernel;
using Castle.MicroKernel.ModelBuilder;
using Castle.MicroKernel.ModelBuilder.Descriptors;
...
public class InterceptorsContributor : IContributeComponentModelConstruction
{
private readonly Predicate<ComponentModel> predicate;
private readonly IComponentModelDescriptor interceptorsDescriptor;
public InterceptorsContributor(Predicate<ComponentModel> predicate, params InterceptorReference[] interceptors)
{
this.predicate = predicate ?? throw new ArgumentNullException(nameof(predicate));
interceptorsDescriptor = new InterceptorDescriptor(interceptors);
}
public void ProcessModel(IKernel kernel, ComponentModel model)
{
if (predicate.Invoke(model))
{
interceptorsDescriptor.BuildComponentModel(kernel, model);
interceptorsDescriptor.ConfigureComponentModel(kernel, model);
}
}
}
对于注册一个IInterceptorSelector
,贡献者可以通过执行以下操作来实现InterceptorSelectorDescriptor
:
public void ProcessModel(IKernel kernel, ComponentModel model)
{
if (...)
{
var options = model.ObtainProxyOptions();
options.Selector = new InstanceReference<IInterceptorSelector>(selector);
}
}
或InterceptorSelectorDescriptor
直接使用:
using System;
using Castle.Core;
using Castle.DynamicProxy;
using Castle.MicroKernel;
using Castle.MicroKernel.ModelBuilder;
using Castle.MicroKernel.ModelBuilder.Descriptors;
...
public class InterceptorSelectorContributor : IContributeComponentModelConstruction
{
private readonly Predicate<ComponentModel> predicate;
private readonly IComponentModelDescriptor interceptorSelectorDescriptor;
public InterceptorSelectorContributor(Predicate<ComponentModel> predicate, IInterceptorSelector selector)
{
this.predicate = predicate ?? throw new ArgumentNullException(nameof(predicate));
var selectorRef = new InstanceReference<IInterceptorSelector>(selector);
interceptorSelectorDescriptor = new InterceptorSelectorDescriptor(selectorRef);
}
public void ProcessModel(IKernel kernel, ComponentModel model)
{
if (predicate.Invoke(model))
{
interceptorSelectorDescriptor.BuildComponentModel(kernel, model);
interceptorSelectorDescriptor.ConfigureComponentModel(kernel, model);
}
}
}