Created
January 3, 2017 11:05
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AsyncMediatorPipeline and Autofac Registration
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public class AsyncMediatorPipeline<TRequest, TResponse> : IAsyncRequestHandler<TRequest, TResponse> where TRequest : IAsyncRequest<TResponse> | |
{ | |
private readonly IAsyncRequestHandler<TRequest, TResponse> inner; | |
private readonly IAsyncPreRequestHandler<TRequest>[] preRequestHandlers; | |
private readonly IAsyncPostRequestHandler<TRequest, TResponse>[] postRequestHandlers; | |
public AsyncMediatorPipeline(IAsyncRequestHandler<TRequest, TResponse> inner, IAsyncPreRequestHandler<TRequest>[] preRequestHandlers, IAsyncPostRequestHandler<TRequest, TResponse>[] postRequestHandlers) | |
{ | |
this.inner = inner; | |
this.preRequestHandlers = preRequestHandlers; | |
this.postRequestHandlers = postRequestHandlers; | |
} | |
public async Task<TResponse> Handle(TRequest message) | |
{ | |
foreach (var preRequestHandler in preRequestHandlers) | |
{ | |
await preRequestHandler.Handle(message); | |
} | |
var result = await inner.Handle(message); | |
foreach (var postRequestHandler in postRequestHandlers) | |
{ | |
await postRequestHandler.Handle(message, result); | |
} | |
return result; | |
} | |
} |
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public class MediatorModule : Module | |
{ | |
protected override void Load(ContainerBuilder builder) | |
{ | |
builder.RegisterType<Mediator>() | |
.AsImplementedInterfaces() | |
.AsSelf() | |
.InstancePerLifetimeScope(); | |
//register all pre handlers | |
builder.RegisterAssemblyTypes(Assembly.GetExecutingAssembly()) | |
.As(type => type.GetInterfaces() | |
.Where(interfacetype => interfacetype.IsClosedTypeOf(typeof (IAsyncPreRequestHandler<>)))) | |
.InstancePerLifetimeScope(); | |
//register all post handlers | |
builder.RegisterAssemblyTypes(Assembly.GetExecutingAssembly()) | |
.As(type => type.GetInterfaces() | |
.Where(interfacetype => interfacetype.IsClosedTypeOf(typeof(IAsyncPostRequestHandler<,>)))) | |
.InstancePerLifetimeScope(); | |
//register all asynchandlers | |
builder.RegisterAssemblyTypes(Assembly.GetExecutingAssembly()) | |
.As(type => type.GetInterfaces() | |
.Where(interfaceType => interfaceType.IsClosedTypeOf(typeof(IAsyncRequestHandler<,>))) | |
.Select(interfaceType => new KeyedService("asyncRequestHandler", interfaceType))) | |
.InstancePerLifetimeScope(); | |
//register pipeline decorators | |
builder.RegisterGenericDecorator(typeof(AsyncMediatorPipeline<,>), typeof(IAsyncRequestHandler<,>), "asyncRequestHandler") | |
.InstancePerLifetimeScope(); | |
} | |
} |
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