简单注入器 (3.1.5) & SignalR (2.2)：SimpleInjector.ActivationException

Question

我尝试实施 here 建议的集成。不幸的是，我的集线器方法没有被调用。此异常阻止它：

SimpleInjector.ActivationException occured. HResult=-2146233088
Message=The disposed object cannot be accessed. Objektname: "SimpleInjector.Scope". Source=SimpleInjector StackTrace: bei SimpleInjector.InstanceProducer.GetInstance() InnerException: HResult=-2146232798 Message=The disposed object cannot be accessed. Objektname: "SimpleInjector.Scope". ObjectName=SimpleInjector.Scope Source=SimpleInjector StackTrace: bei SimpleInjector.Scope.ThrowObjectDisposedException() bei SimpleInjector.Scope.RequiresInstanceNotDisposed() bei SimpleInjector.Scope.GetInstance[TService,TImplementation](ScopedRegistration2 registration) bei SimpleInjector.Scope.GetInstance[TService,TImplementation](ScopedRegistration2 registration, Scope scope) bei SimpleInjector.Advanced.Internal.LazyScopedRegistration2.GetInstance(Scope scope) bei lambda_method(Closure ) bei Glimpse.SimpleInjector.SimpleInjectorTab.CollectResolvedInstance(InitializationContext context, Func1 instanceProducer) bei SimpleInjector.Container.<>c__DisplayClass52_0.b__0() bei SimpleInjector.InstanceProducer.GetInstance() InnerException:

这个被扔在：

SimpleInjector.dll!SimpleInjector.InstanceProducer.GetInstance() Unbekannt SimpleInjector.dll!SimpleInjector.Container.GetInstance(System.Type serviceType) Unbekannt idee5.Dispatcher.dll!SimpleInjector.SignalR.SimpleInjectorHubActivator.Create(Microsoft.AspNet.SignalR.Hubs.HubDescriptor descriptor) Zeile 11 C# Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Hubs.DefaultHubManager.ResolveHub(string hubName) Unbekannt 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) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Hubs.HubDispatcher.OnReceived(Microsoft.AspNet.SignalR.IRequest request, string connectionId, string data) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.PersistentConnection.ProcessRequestPostGroupRead.AnonymousMethod__7() Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.FromMethod(System.Func func) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.PersistentConnection.ProcessRequestPostGroupRead.AnonymousMethod__6(string data) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Transports.WebSocketTransport.OnMessage(string message) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.WebSockets.DefaultWebSocketHandler.OnMessage(string message) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.WebSockets.WebSocketHandler.ProcessWebSocketRequestAsync(System.Net.WebSockets.WebSocket webSocket, System.Threading.CancellationToken disconnectToken, System.Func> messageRetriever, object state) Unbekannt mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine) Unbekannt mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unbekannt mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unbekannt mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run() Unbekannt mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0() Unbekannt mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke() Unbekannt mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0() Unbekannt mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke() Unbekannt mscorlib.dll!System.Threading.Tasks.SynchronizationContextAwaitTaskContinuation..cctor.AnonymousMethod__8_0(object state) Unbekannt System.Web.dll!System.Web.AspNetSynchronizationContext.Post.AnonymousMethod__0() Unbekannt System.Web.dll!System.Web.Util.SynchronizationHelper.SafeWrapCallback(System.Action action) Unbekannt System.Web.dll!System.Web.Util.SynchronizationHelper.QueueAsynchronous.AnonymousMethod__0(System.Threading.Tasks.Task _) Unbekannt mscorlib.dll!System.Threading.Tasks.ContinuationTaskFromTask.InnerInvoke() Unbekannt mscorlib.dll!System.Threading.Tasks.Task.Execute() Unbekannt mscorlib.dll!System.Threading.Tasks.Task.ExecutionContextCallback(object obj) Unbekannt mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unbekannt mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unbekannt mscorlib.dll!System.Threading.Tasks.Task.ExecuteWithThreadLocal(ref System.Threading.Tasks.Task currentTaskSlot) Unbekannt mscorlib.dll!System.Threading.Tasks.Task.ExecuteEntry(bool bPreventDoubleExecution) Unbekannt mscorlib.dll!System.Threading.Tasks.Task.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem() Unbekannt mscorlib.dll!System.Threading.ThreadPoolWorkQueue.Dispatch() Unbekannt mscorlib.dll!System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()

另一个可疑的异常是：

SimpleInjector.ActivationException ist aufgetreten. HResult=-2146233088 Message=The SchedulerHub is registered as 'Hybrid Execution Context Scope / Web Request' lifestyle, but the instance is requested outside the context of a Hybrid Execution Context Scope / Web Request. Source=SimpleInjector StackTrace: bei SimpleInjector.Scope.GetScopelessInstance[TService,TImplementation](ScopedRegistration`2 registration) InnerException:

这个被扔在：

SimpleInjector.dll!SimpleInjector.Scope.GetScopelessInstance(SimpleInjector.Lifestyles.ScopedRegistration registration) Unbekannt SimpleInjector.dll!SimpleInjector.Scope.GetInstance(SimpleInjector.Lifestyles.ScopedRegistration registration, SimpleInjector.Scope scope) Unbekannt SimpleInjector.dll!SimpleInjector.Advanced.Internal.LazyScopedRegistration.GetInstance(SimpleInjector.Scope scope) Unbekannt [Lightweightfunktion]
Glimpse.SimpleInjector.dll!Glimpse.SimpleInjector.SimpleInjectorTab.CollectResolvedInstance(SimpleInjector.Advanced.InitializationContext context, System.Func instanceProducer) Unbekannt SimpleInjector.dll!SimpleInjector.Container.ApplyResolveInterceptor.AnonymousMethod__0() Unbekannt SimpleInjector.dll!SimpleInjector.InstanceProducer.GetInstance() Unbekannt SimpleInjector.dll!SimpleInjector.Container.GetInstance(System.Type serviceType) Unbekannt idee5.Dispatcher.dll!SimpleInjector.SignalR.SimpleInjectorHubActivator.Create(Microsoft.AspNet.SignalR.Hubs.HubDescriptor descriptor) Zeile 11 C# Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Hubs.DefaultHubManager.ResolveHub(string hubName) Unbekannt 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) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Hubs.HubDispatcher.GetHubs.AnonymousMethod__39(Microsoft.AspNet.SignalR.Hubs.HubDescriptor descriptor) Unbekannt System.Core.dll!System.Linq.Enumerable.WhereSelectListIterator.MoveNext() Unbekannt System.Core.dll!System.Linq.Enumerable.WhereEnumerableIterator.MoveNext() Unbekannt mscorlib.dll!System.Collections.Generic.List.List(System.Collections.Generic.IEnumerable collection) Unbekannt System.Core.dll!System.Linq.Enumerable.ToList(System.Collections.Generic.IEnumerable source) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Hubs.HubDispatcher.ExecuteHubEvent(Microsoft.AspNet.SignalR.IRequest request, string connectionId, System.Func action) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Hubs.HubDispatcher.OnReconnected(Microsoft.AspNet.SignalR.IRequest request, string connectionId) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.PersistentConnection.ProcessRequestPostGroupRead.AnonymousMethod__5() Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.FromMethod(System.Func func) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.PersistentConnection.ProcessRequestPostGroupRead.AnonymousMethod__4() Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Transports.ForeverTransport.ProcessReceiveRequest.AnonymousMethod__1c() Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Transports.ForeverTransport.ProcessMessages(Microsoft.AspNet.SignalR.Transports.ITransportConnection connection, System.Func initialize) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Transports.ForeverTransport.ProcessReceiveRequest(Microsoft.AspNet.SignalR.Transports.ITransportConnection connection) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Transports.ForeverTransport.ProcessRequestCore.AnonymousMethod__e(Microsoft.AspNet.SignalR.Transports.ForeverTransport t, Microsoft.AspNet.SignalR.Transports.ITransportConnection c) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.FromMethod(System.Func func, System.__Canon arg1, System.__Canon arg2) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.TaskAsyncHelper.Then(System.Threading.Tasks.Task task, System.Func successor, Microsoft.AspNet.SignalR.Transports.ForeverTransport arg1, Microsoft.AspNet.SignalR.Transports.ITransportConnection arg2) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Transports.ForeverTransport.ProcessRequestCore(Microsoft.AspNet.SignalR.Transports.ITransportConnection connection) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Transports.WebSocketTransport.ProcessRequest.AnonymousMethod__2(Microsoft.AspNet.SignalR.Hosting.IWebSocket socket) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Owin.OwinWebSocketHandler.RunWebSocketHandler.AnonymousMethod__0() Unbekannt mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder.Startc__DisplayClass1.<b__0>d__3 stateMachine) Unbekannt Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Owin.OwinWebSocketHandler.RunWebSocketHandler.AnonymousMethod__0() Unbekannt mscorlib.dll!System.Threading.Tasks.Task.InnerInvoke() Unbekannt mscorlib.dll!System.Threading.Tasks.Task.Execute() Unbekannt mscorlib.dll!System.Threading.Tasks.Task.ExecutionContextCallback(object obj) Unbekannt mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unbekannt mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unbekannt mscorlib.dll!System.Threading.Tasks.Task.ExecuteWithThreadLocal(ref System.Threading.Tasks.Task currentTaskSlot) Unbekannt mscorlib.dll!System.Threading.Tasks.Task.ExecuteEntry(bool bPreventDoubleExecution) Unbekannt mscorlib.dll!System.Threading.Tasks.Task.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem() Unbekannt mscorlib.dll!System.Threading.ThreadPoolWorkQueue.Dispatch() Unbekannt mscorlib.dll!System.Threading._ThreadPoolWaitCallback.PerformWaitCallback() Unbekannt

两个都被抓住了。我怀疑这就是似乎什么都没发生并且我的集线器方法没有被调用的原因。

经过一些尝试'n'错误会话后，我最终得到了这个容器配置。

    public static Container GetInitializeContainer(IAppBuilder app) {
    // configure AutoMapper
    MapperConfiguration mapperConfig = ConfigureMappings();

    // Create the container as usual.
    var container = new Container();
    ScopedLifestyle hybrid = Lifestyle.CreateHybrid(
        () => container.GetCurrentExecutionContextScope() != null,
        new ExecutionContextScopeLifestyle(),
        new WebRequestLifestyle());
    container.Options.DefaultScopedLifestyle = hybrid;

    // Registering the types
    container.RegisterSingleton(() => mapperConfig.CreateMapper());
    container.RegisterSingleton(app);
    container.RegisterPerWebRequest<IUrlHelperProvider, UrlHelperProvider>();
    // register the singleton services
    container.RegisterSingleton<ICacheService>(new CacheService());
    container.RegisterSingleton<ILoggingService, LoggingService>();

    // register application services
    // get the assembly containing the services 
    Assembly repositoryAssembly = typeof(CompanyService).Assembly;
    // get the services namespace
    string @namespace = typeof(CompanyService).Namespace;
    // register all interfaces in the assembly besides the singletons
    var registrations =
        from type in repositoryAssembly.GetExportedTypes()
        where type.Namespace == @namespace
        where type.GetInterfaces().Any(i => i.Name.EndsWith(value: "Service") &&
            i.Name != nameof(ICacheService) && i.Name != nameof(ILoggingService))
        select new { Service = type.GetInterfaces().Single(i => i.Name.EndsWith(value: "Service")), Implementation = type };

    foreach (var reg in registrations) {
        container.Register(reg.Service, reg.Implementation, new WebRequestLifestyle());
    }

    container.RegisterPerWebRequest<ApplicationUserManager>();
    container.RegisterPerWebRequest<IUserStore<IdentityUser, Guid>>(() => new UserStore());
    container.RegisterInitializer<ApplicationUserManager>(manager => InitializeUserManager(manager, app));
    // register the role manager
    container.RegisterPerWebRequest<ApplicationRoleManager>();
    container.RegisterPerWebRequest<IRoleStore<IdentityRole, Guid>>(() => new RoleStore());
    container.RegisterInitializer<ApplicationRoleManager>(manager => InitializeRoleManager(manager));

    container.Register<Hubs.SchedulerHub, Hubs.SchedulerHub>(Lifestyle.Scoped);
    // register the sign in manager
    container.RegisterPerWebRequest<ApplicationSignInManager>();
    container.RegisterPerWebRequest(() => AdvancedExtensions.IsVerifying(container)
            ? new OwinContext(new Dictionary<string, object>()).Authentication
            : HttpContext.Current.GetOwinContext().Authentication);

    // Register all controllers and filters. Including those in MVC areas
    container.RegisterMvcControllers();
    container.RegisterMvcIntegratedFilterProvider();

    // register OWIN
    app.Use(async (context, next) => {
        using (container.BeginExecutionContextScope()) {
            CallContext.LogicalSetData(name: "IOwinContext", data: context);
            await next();
        }
    });
    container.RegisterSingleton<IOwinContextProvider>(new CallContextOwinContextProvider());

    return container;
}

我的集线器激活器：

    public class SimpleInjectorHubActivator : IHubActivator {
    public SimpleInjectorHubActivator(Container container) {
        _container = container;
    }

    public IHub Create(HubDescriptor descriptor) {
        return (IHub) _container.GetInstance(descriptor.HubType);
    }

    private readonly Container _container;
}

我的中心调度员：

public class SimpleInjectorHubDispatcher : HubDispatcher {
    public SimpleInjectorHubDispatcher(Container container, HubConfiguration configuration)
        : base(configuration) {
        _container = container;
    }

    protected override Task OnConnected(IRequest request, string connectionId) {
        return Invoke(() => base.OnConnected(request, connectionId));
    }

    protected override Task OnReceived(IRequest request, string connectionId, string data) {
        return Invoke(() => base.OnReceived(request, connectionId, data));
    }

    protected override Task OnDisconnected(IRequest request, string connectionId,
        bool stopCalled) {
        return Invoke(() => base.OnDisconnected(request, connectionId, stopCalled));
    }

    protected override Task OnReconnected(IRequest request, string connectionId) {
        return Invoke(() => base.OnReconnected(request, connectionId));
    }

    private async Task Invoke(Func<Task> method) {
        using (_container.BeginExecutionContextScope())
            await method();
    }

    private readonly Container _container;
}

如何防止此异常并调用我的集线器方法？

Answer 1

感谢 Stevens 的聊天支持和深入挖掘，我发现了这个漏洞。我混淆了hub的生活方式和使用的服务。

困难的部分是收集有关静默失败的 SignalR 调用的任何详细信息。如果其他人遇到这种情况，我想分享两个关于如何收集更多信息的提示：

仔细查看您的调试输出并查找可疑异常。
告诉 Visual Studio 在发生这些情况时中断。

这样你就可以掌握堆栈跟踪、内部异常等。否则你将找不到原因。在我的案例中，我监控了 SimpleInjector.ActivationException，Steven 帮助我找到了原因。

Answer 2

从堆栈跟踪中我看到调用了默认 HubDispatcher，而不是您的自定义 SimpleInjectorHubDispatcher。这意味着没有应用范围，这可能是您收到消息 "the instance is requested outside the context of a Hybrid Execution Context Scope / Web Request."

的原因

您应该按如下方式注册您的 SimpleInjectorHubDispatcher：我认为错误在以下行中：

var dispatcher = new SimpleInjectorHubDispatcher(container, config);
config.Resolver.Register(typeof(HubDispatcher), dispatcher);

简单注入器 (3.1.5) & SignalR (2.2)：SimpleInjector.ActivationException

Simple Injector (3.1.5) & SignalR (2.2): SimpleInjector.ActivationException

c#

simple-injector

signalr