Question

我尝试实施here提议的集成。不幸的是我的中心方法没有调用。这个例外阻止了它：

发生了SimpleInjector.ActivationException。的HResult = -2146233088
消息=无法访问已处置的对象。 Objektname：＆＃34; SimpleInjector.Scope＆＃34 ;. Source = SimpleInjector StackTrace： bei SimpleInjector.InstanceProducer.GetInstance（）InnerException：的HResult = -2146232798 消息=无法访问已处置的对象。 Objektname：＆＃34; SimpleInjector.Scope＆＃34;。对象名= SimpleInjector.Scope 来源= SimpleInjector 堆栈跟踪： bei SimpleInjector.Scope.ThrowObjectDisposedException（） bei SimpleInjector.Scope.RequiresInstanceNotDisposed（） bei SimpleInjector.Scope.GetInstance [TService，TImplementation]（ScopedRegistration2 注册） bei SimpleInjector.Scope.GetInstance [TService，TImplementation]（ScopedRegistration2 注册，范围范围） bei SimpleInjector.Advanced.Internal.LazyScopedRegistration2.GetInstance（范围）范围） bei lambda_method（关闭） bei Glimpse.SimpleInjector.SimpleInjectorTab.CollectResolvedInstance（InitializationContext context，Func1 instanceProducer） bei SimpleInjector.Container。＆lt;＆gt; c__DisplayClass52_0.b__0（） bei SimpleInjector.InstanceProducer.GetInstance（）的InnerException：

这个被抛出：

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描述符）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请求，Microsoft.AspNet.SignalR.Hubs.HubDescriptor描述符，字符串connectionId，Microsoft.AspNet.SignalR .Hubs.StateChangeTracker跟踪器，bool throwIfFailedToCreate）Unbekannt Microsoft.AspNet.SignalR.Core.dll！Microsoft.AspNet.SignalR.Hubs.HubDispatcher.OnReceived（Microsoft.AspNet.SignalR.IRequest请求，字符串connectionId，字符串数据）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（字符串数据）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＆gt; 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（对象状态）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（）

另一个可疑的例外是：

SimpleInjector.ActivationException ist aufgetreten。的HResult = -2146233088 Message = SchedulerHub注册为＆＃39;混合执行上下文范围/ Web请求＆＃39;生活方式，但实例是在混合执行上下文范围/ Web请求的上下文之外请求的。来源= SimpleInjector 堆栈跟踪： bei SimpleInjector.Scope.GetScopelessInstance [TService，TImplementation]（ScopedRegistration`2 registration） InnerException：

这个被抛出：

SimpleInjector.dll！SimpleInjector.Scope.GetScopelessInstance（SimpleInjector.Lifestyles.ScopedRegistration registration）Unbekannt       SimpleInjector.dll！SimpleInjector.Scope.GetInstance（SimpleInjector.Lifestyles.ScopedRegistration注册，SimpleInjector.Scope范围）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描述符）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请求，Microsoft.AspNet.SignalR.Hubs.HubDescriptor描述符，字符串connectionId，Microsoft.AspNet.SignalR .Hubs.StateChangeTracker跟踪器，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任务，System.Func后继者，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。＆lt; b__0＆gt; 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

两者都被抓住了。而且我怀疑这似乎没有发生任何事情，我的集线器方法也没有被调用。

经过一些尝试错误的会话后，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;
}

我的中心激活器：

    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;
}

我的枢纽调度员：

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

从堆栈跟踪中我看到默认HubDispatcher被调用，而不是您的自定义SimpleInjectorHubDispatcher。这意味着不应用范围，这可能是您收到消息“在混合执行上下文范围/ Web请求的上下文之外请求实例”的原因。

您应该注册SimpleInjectorHubDispatcher，如下所示：我认为错误在以下几行：

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

Answer 2

感谢史蒂文斯的聊天支持和一些深挖，我发现了这个漏洞。我混淆了集线器的生活方式和使用过的服务。

困难的部分是收集有关静默失败的SignalR呼叫的任何细节。如果有其他人遇到这种情况，我想就如何收集更多信息分享两个提示：

仔细查看调试输出并查找可疑异常。
如果发生这种情况，请告诉Visual Studio中断。

这样你就可以掌握堆栈跟踪，内部异常等。否则你不会找到原因。在我的情况下，我监控了SimpleInjector.ActivationException，Steven帮我找到了原因。

简单的注射器（3.1.5）＆amp; SignalR（2.2）：SimpleInjector.ActivationException

2 个答案: