Signalr 在owin应用程序和MassTransit中配置信号器时出现问题

正在尝试设置一个SignalR hub（规范聊天），以便在OWIN托管的Nancy应用程序和MassTransit中运行。MassTransit部分工作：

public ChatMessageConsumer(IEnumerable<IChatMessageProcessor> messageProcessors,
    IChatHub chatHub, 
    ILogger logger) { ... }

public async Task Consume(ConsumeContext<IChatMessage> context)
{
    _chatHub.BroadcastMessage( ... );
}

我需要改变：

builder.RegisterType<ChatHub>().As<IChatHub>().ExternallyOwned().SingleInstance();

builder.RegisterType（）.As（）.ExternallyOwned（）.SingleInstance（）；

致：

builder.RegisterType（）.ExternallyOwned（）；
builder.Register（c=>c.Resolve（））.As（）；

在这一点上，我不完全确定为什么，但我将在Autofac源代码中做一些挖掘，并更新这个答案

---

我以前尝试过很多变体，包括

SingleInstance

和

asimplementedinterface

，等等。，但是，在我将其剥离到中所显示的内容之前，一切都不起作用。

您是否安装并初始化了Autofac Signal R集成？您的意思是

安装包Autofac.Signal

，然后执行以下操作？好的，我已经按照文件中的说明做了。这就是为什么我把我的启动

Configuration

code包括在内，以防我遗漏了什么。你有堆栈跟踪吗？如果没有，能否在无参数构造函数上添加断点并共享完整的调用堆栈？能否检查

config.Resolver

是否正确（即

autofacdependencysolver

）？

hubConfiguration.Resolver.GetType（）

生成

{Name=“autofacdependencysolver”FullName=“Autofac.Integration.Signal.AutofacDependencyResolver”}

public void Configuration(IAppBuilder app)
{
    var container = ResolveDependencies();
    var hubConfiguration = new HubConfiguration
    {
        EnableDetailedErrors = true,
        Resolver = container.Resolve<IDependencyResolver>()
    };

    app.UseAutofacMiddleware(container);
    app.MapSignalR(hubConfiguration);
    app.Map("/site", sb => sb.UseNancy(options => options.Bootstrapper = new ChatBootstrapper(container)));
    // snip MassTransit bus start/stop, etc. ...
}

static IContainer ResolveDependencies()
{
    var builder = new ContainerBuilder();

    // snip MassTransit consumers, etc. ...

    builder.RegisterType<ChatHub>().As<IChatHub>().ExternallyOwned().SingleInstance();
    builder.RegisterType<AutofacDependencyResolver>().As<IDependencyResolver>().SingleInstance();
    builder.Register(i => i.Resolve<IDependencyResolver>()
            .Resolve<IConnectionManager>()
            .GetHubContext<ChatHub, IChatHub>())
        .SingleInstance()
        .ExternallyOwned();
    // snip Logger registrations, etc. ...
}

>   Chat.Service.exe!Chat.Service.Hubs.ChatHub.ChatHub() Line 25    C#
    mscorlib.dll!System.Activator.CreateInstance(System.Type type, bool nonPublic)  Unknown
    mscorlib.dll!System.Activator.CreateInstance(System.Type type)  Unknown
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Hubs.DefaultHubActivator.Create(Microsoft.AspNet.SignalR.Hubs.HubDescriptor descriptor) Line 29  C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Hubs.DefaultHubManager.ResolveHub(string hubName) Line 89    C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Hubs.HubDispatcher.CreateHub(Microsoft.AspNet.SignalR.IRequest request, Microsoft.AspNet.SignalR.Hubs.HubDescriptor descriptor, string connectionId, Microsoft.AspNet.SignalR.Hubs.StateChangeTracker tracker, bool throwIfFailedToCreate) Line 455  C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Hubs.HubDispatcher.OnReceived(Microsoft.AspNet.SignalR.IRequest request, string connectionId, string data) Line 180  C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.PersistentConnection.ProcessRequestPostGroupRead.AnonymousMethod__5() Line 282   C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.FromMethod(System.Func<System.Threading.Tasks.Task> func) Line 771   C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.PersistentConnection.ProcessRequestPostGroupRead.AnonymousMethod__4(string data) Line 282    C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Transports.ForeverTransport.ProcessSendRequest() Line 151    C#
    [Resuming Async Method] 
    mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)  Unknown
    mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)   Unknown
    mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)   Unknown
    mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()    Unknown
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.RunWithPreservedCulture.AnonymousMethod__72_0(System.Action f) Line 1036 C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.RunWithPreservedCulture.AnonymousMethod__71_0(System.Action<System.__Canon> f, System.__Canon state) Line 1028   C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.RunWithPreservedCulture<System.__Canon, System.__Canon, System.__Canon>(Microsoft.AspNet.SignalR.TaskAsyncHelper.CulturePair preservedCulture, System.Func<System.__Canon, System.__Canon, System.__Canon> func, System.__Canon arg1, System.__Canon arg2) Line 1009 C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.RunWithPreservedCulture<System.Action>(Microsoft.AspNet.SignalR.TaskAsyncHelper.CulturePair preservedCulture, System.Action<System.Action> action, System.Action arg) Line 1031  C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.RunWithPreservedCulture(Microsoft.AspNet.SignalR.TaskAsyncHelper.CulturePair preservedCulture, System.Action action) Line 1037   C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAwaiterHelper.PreserveCultureUnsafeOnCompleted.AnonymousMethod__0() Line 48  C#
    mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask)    Unknown
    mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()  Unknown
    mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree() Unknown
    mscorlib.dll!System.Threading.Tasks.Task<System.__Canon>.TrySetResult(System.__Canon result)    Unknown
    mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<Microsoft.AspNet.SignalR.Hosting.INameValueCollection>.SetResult(Microsoft.AspNet.SignalR.Hosting.INameValueCollection result)  Unknown
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Owin.ServerRequest.ReadForm() Line 111   C#
    [Resuming Async Method] 
    mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)  Unknown
    mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)   Unknown
    mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)   Unknown
    mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()    Unknown
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.RunWithPreservedCulture.AnonymousMethod__72_0(System.Action f) Line 1036 C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.RunWithPreservedCulture.AnonymousMethod__71_0(System.Action<System.__Canon> f, System.__Canon state) Line 1028   C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.RunWithPreservedCulture<System.__Canon, System.__Canon, System.__Canon>(Microsoft.AspNet.SignalR.TaskAsyncHelper.CulturePair preservedCulture, System.Func<System.__Canon, System.__Canon, System.__Canon> func, System.__Canon arg1, System.__Canon arg2) Line 1009 C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.RunWithPreservedCulture<System.Action>(Microsoft.AspNet.SignalR.TaskAsyncHelper.CulturePair preservedCulture, System.Action<System.Action> action, System.Action arg) Line 1031  C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.RunWithPreservedCulture(Microsoft.AspNet.SignalR.TaskAsyncHelper.CulturePair preservedCulture, System.Action action) Line 1037   C#
    Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAwaiterHelper.PreserveCultureUnsafeOnCompleted.AnonymousMethod__0() Line 48  C#
    mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()    Unknown
    mscorlib.dll!System.Threading.ThreadPoolWorkQueue.Dispatch()    Unknown
    mscorlib.dll!System.Threading._ThreadPoolWaitCallback.PerformWaitCallback() Unknown
    [Async Call]    
    Microsoft.Owin.dll!Microsoft.Owin.Mapping.MapMiddleware.Invoke(System.Collections.Generic.IDictionary<string, object> environment) Line 64  C#
    [Async Call]    
    Autofac.Integration.Owin.dll!Owin.AutofacAppBuilderExtensions.RegisterAutofacLifetimeScopeInjector.AnonymousMethod__0(Microsoft.Owin.IOwinContext context, System.Func<System.Threading.Tasks.Task> next) Line 333  C#
    [Async Call]    
    Microsoft.Owin.Host.HttpListener.dll!Microsoft.Owin.Host.HttpListener.OwinHttpListener.ProcessRequestAsync(System.Net.HttpListenerContext context) Line 262 C#
    [Async Call]    
    Microsoft.Owin.Host.HttpListener.dll!Microsoft.Owin.Host.HttpListener.OwinHttpListener.ProcessRequestsAsync() Line 244  C#

builder.RegisterType<ChatHub>().As<IChatHub>().ExternallyOwned().SingleInstance();

builder.RegisterType<ChatHub>().ExternallyOwned();
builder.Register(c => c.Resolve<ChatHub>()).As<IChatHub>();