Xer*_*xes 3 c# dependency-injection castle-windsor ioc-container interception
我试图拦截命令处理程序上对Handle方法的调用。当我显式注册每个命令处理程序时,此过程运行良好,问题是我对命令处理程序和拦截器的常规注册不正确。
例外:
Castle.Windsor.dll中发生类型'Castle.MicroKernel.ComponentActivator.ComponentActivatorException'的异常,但未在用户代码中处理
附加信息:ComponentActivator:无法代理TempSearch.Command.Data.CommandHandlers.AddTempsJobCommandHandler
似乎无法找到拦截器,因为它说某些组件配置错误:
“此组件的某些依赖项无法静态解析。\ r \ n'TempSearch.Command.Data.CommandHandlers.AddTempsCandidateAvailabilityCommandHandler'正在等待以下依赖项: )(您没有忘记注册它或名称拼写错误吗?)如果该组件已注册并且通过类型覆盖,请确保它没有显式分配非默认名称,或者通过名称覆盖相关性。 n“
界面:
public interface ICommandHandler<TCommand>
{
void Handle(TCommand command);
}
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示例命令处理程序:
public class AddTempsCandidateAvailabilityCommandHandler
: ICommandHandler<TempsCandidateAvailability>
{
private readonly IDbConnection connection;
public AddTempsCandidateAvailabilityCommandHandler(
IDbConnection connection)
{
this.connection = connection;
}
public void Handle(TempsCandidateAvailability command)
{
// ...
}
}
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注册:
public void Install(IWindsorContainer container, IConfigurationStore store)
{
container.Register(
Component.For<IDbConnection>()
.UsingFactoryMethod(() => ConnectionHelper.GetOpenDbConnection(
Connection.DatabaseName.ReedOnline))
.LifestylePerWebRequest());
container.Register(
Classes
.FromAssemblyContaining<EcruiterCommands>()
.Where(t => t.Name.EndsWith("Commands"))
.WithService
.AllInterfaces().LifestylePerWebRequest());
container.Register(
Classes
.FromAssemblyContaining<EcruiterCommands>()
.Where(t => t.Name.EndsWith("CommandHandler"))
.WithService.AllInterfaces()
.LifestylePerWebRequest()
.Configure(c => c.Interceptors<ExceptionHandlingIntercepter>()
.LifestyleTransient()));
}
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拦截器:
[Transient]
public class ExceptionHandlingIntercepter : IInterceptor
{
private static readonly MethodInfo Execute =
typeof(ICommandHandler<>).GetMethod("Handle");
private readonly IKernel kernel;
public ExceptionHandlingIntercepter(IKernel kernel)
{
this.kernel = kernel;
}
public void Intercept(IInvocation invocation)
{
if (invocation.Method != Execute)
{
invocation.Proceed();
return;
}
try
{
invocation.Proceed();
}
finally
{
kernel.ReleaseComponent(invocation.Proxy);
}
}
}
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您必须注册拦截器本身,以便让Castle在初始化命令处理程序时对其进行解析。将以下内容添加到您的注册中:
container.Register(
Component.For<ExceptionHandlingIntercepter>(); // should be enough
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我喜欢命名拦截器以按名称进行注册(不知道为什么,因为您的方法应该可以正常工作)
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