我正在逐个注册几个类型:
container.Register(
Component.For<IService1>().ImplementedBy<ServiceImpl1>(),
Component.For<IService2>().ImplementedBy<ServiceImpl2>(),
Component.For<IService3>().ImplementedBy<ServiceImpl3>(),
Component.For<IService4>().ImplementedBy<ServiceImpl4>()
);
是否有一种方法可以为已注册的该程序集的所有类型注册拦截器?我不想像AllTypes
那样按惯例注册所有类型。我只是想添加一个拦截器,而不写
.Interceptors(InterceptorReference.ForType<DummyInterceptor>())
.SelectedWith(new FooInterceptorSelector()).Anywhere
无数次。
谢谢!
根据Dan的建议,这可以使用自定义ComponentModel构建贡献者来实现。
首先,注意
...
.Interceptors(InterceptorReference.ForType<DummyInterceptor>())
.SelectedWith(new FooInterceptorSelector())
.Anywhere
基本上等同于
...
.SelectInterceptorsWith(new FooInterceptorSelector())
.Interceptors(InterceptorReference.ForType<DummyInterceptor>())
.Anywhere
即,将IInterceptorSelector
与ComponentModel
相关联与注册将使用IInterceptorSelector
选择的拦截器无关。而且,每个ComponentModel
只能有一个拦截器选择器。
由于这种分离,最好使用两个独立的贡献者来解决问题——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Dan的答案基本相同。但是,不应该为拦截器添加DependencyModel
,因为拦截器应该已经使用
container.Register(Component.For<DummyInterceptor>().LifestyleTransient());
所以它可以看起来像
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)
}
}
}
或者如果你想一次注册多个拦截器,可以利用InterceptorDescriptor
的现有实现,而是这样做:
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IInterceptorSelector
,贡献者可以通过执行InterceptorSelectorDescriptor
的操作来实现:
public void ProcessModel(IKernel kernel, ComponentModel model)
{
if (...)
{
var options = model.ObtainProxyOptions();
options.Selector = new InstanceReference<IInterceptorSelector>(selector);
}
}
或直接使用InterceptorSelectorDescriptor
:
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);
}
}
}
如何在使用ComponentModel贡献者时指定.SelectedWith ?通过这样做,我可以为所有方法添加一个拦截器。
public class MyContributor : IContributeComponentModelConstruction
{
public void ProcessModel(IKernel kernel, ComponentModel model)
{
model.Dependencies.Add(new DependencyModel(DependencyType.Service, null, typeof(MyInterceptor), false));
model.Interceptors.AddFirst(InterceptorReference.ForType<MyInterceptor>());
}
}