简单注入器 - ASP.NET 5 Identity 和 RavenDB 的困难

Question

我试图在 MVC 应用程序上使用 SimpleInjector 和 ASP.NET 5，但在正确连接时遇到了一个主要问题。

我运行一个RavenDB 数据库，因此我有实例化实例的方法，这就是我在注册接口时使用的方法，就像这样；

private void InitializeContainer(IApplicationBuilder app) {

    container.CrossWire<IUserStore<AppUser>>(app);
    container.CrossWire<UserManager<AppUser>>(app);
    container.CrossWire<SignInManager<AppUser>>(app);
    container.CrossWire<ILoggerFactory>(app);

    container.Register<IDocumentStore>(RavenDatabase.OpenDatabase);

    container.Register<IDocumentSession>(RavenDatabase.OpenSession);

    container.Register<IAsyncDocumentSession>(RavenDatabase.OpenAsyncSession);

    container.Register<ILookupNormalizer>(() => new LowerInvariantLookupNormalizer());

    container.Register<IPasswordHasher<AppUser>>(() => new PasswordHasher<AppUser>());
}

问题似乎出在IUserStore。当我尝试加载应用程序时，我得到了这个异常..

在尝试激活“App.Identity.UserStore`1[App.Identity.AppUser]”时无法解析“Raven.Client.IAsyncDocumentSession”类型的服务。

不过，我真的不确定这是为什么。我注册了IAsyncDocumentSession，为什么不能注入呢？我也试过这样...

container.Register<IUserStore<AppUser>>(RavenDatabase.UserStore);

使用这样定义的方法...

public static UserStore<AppUser> UserStore() {
    // check to see if we even have a session factory to get a session from
    if (documentStore == null)
        OpenDatabase();

    return new UserStore<AppUser>(documentStore.OpenAsyncSession());
}

但我仍然继续收到异常。我很茫然，在这里。这是我第一次使用 Simple Injector。

堆栈跟踪

System.InvalidOperationException

Unable to resolve service for type 'Raven.Client.IAsyncDocumentSession' while attempting to activate 'App.Identity.UserStore`1[App.Identity.AppUser]'.
at Microsoft.Extensions.DependencyInjection.ServiceLookup.Service.PopulateCallSites(ServiceProvider provider, ISet<Type> callSiteChain, ParameterInfo[] parameters, Boolean throwIfCallSiteNotFound) 
at Microsoft.Extensions.DependencyInjection.ServiceLookup.Service.CreateCallSite(ServiceProvider provider, ISet<Type> callSiteChain) 
at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetResolveCallSite(IService service, ISet<Type> callSiteChain) 
at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetServiceCallSite(Type serviceType, ISet<Type> callSiteChain) 
at Microsoft.Extensions.DependencyInjection.ServiceLookup.Service.PopulateCallSites(ServiceProvider provider, ISet<Type> callSiteChain, ParameterInfo[] parameters, Boolean throwIfCallSiteNotFound) 
at Microsoft.Extensions.DependencyInjection.ServiceLookup.Service.CreateCallSite(ServiceProvider provider, ISet<Type> callSiteChain) 
at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetResolveCallSite(IService service, ISet<Type> callSiteChain) 
at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetServiceCallSite(Type serviceType, ISet<Type> callSiteChain) 
at Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateServiceAccessor(Type serviceType, ServiceProvider serviceProvider) 
at System.Collections.Concurrent.ConcurrentDictionaryExtensions.GetOrAdd<TKey, TValue, TArg>(ConcurrentDictionary<TKey, TValue> dictionary, TKey key, Func<TKey, TArg, TValue> valueFactory, TArg arg) 
at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType) 
at Microsoft.Extensions.DependencyInjection.ServiceProviderExtensions.GetRequiredService(IServiceProvider provider, Type serviceType) 
at Microsoft.Extensions.DependencyInjection.ServiceProviderExtensions.GetRequiredService<T>(IServiceProvider provider) 
.lambda_method(Closure ) 
at SimpleInjector.InstanceProducer.BuildAndReplaceInstanceCreatorAndCreateFirstInstance() 
at SimpleInjector.InstanceProducer.GetInstance()

SimpleInjector.ActivationException

Unable to resolve service for type 'Raven.Client.IAsyncDocumentSession' while attempting to activate 'App.Identity.UserStore`1[App.Identity.AppUser]'.
at SimpleInjector.InstanceProducer.GetInstance() 
at SimpleInjector.InstanceProducer.VerifyInstanceCreation()

System.InvalidOperationException

The configuration is invalid. Creating the instance for type LoginController failed. Unable to resolve service for type 'Raven.Client.IAsyncDocumentSession' while attempting to activate 'App.Identity.UserStore`1[App.Identity.AppUser]'.

System.Reflection.TargetInvocationException

Exception has been thrown by the target of an invocation.
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) 
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) 
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) 
at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters) 
at Microsoft.AspNet.Hosting.Startup.ConfigureBuilder.Invoke(Object instance, IApplicationBuilder builder) 
at Microsoft.AspNet.Hosting.Startup.ConfigureBuilder.<>c__DisplayClass4_0.<Build>b__0(IApplicationBuilder builder) 
at Microsoft.AspNet.Hosting.Internal.AutoRequestServicesStartupFilter.<>c__DisplayClass0_0.<Configure>b__0(IApplicationBuilder builder) 
at Microsoft.AspNet.Hosting.Internal.HostingEngine.BuildApplication()

Answer 1

据我所知，这个问题与 Simple Injector 无关。从您的注册中，我看到的异常信息如下：

• 您正在从 Simple Injector 解析 LoginController。
• 这个LoginController 依赖于Raven.Client.IAsyncDocumentSession。
• IAsyncDocumentSession 使用 CrossWire<IAsyncDocumentSession> 从 ASP.NET 配置系统交叉连接到 Simple Injector。
• IAsyncDocumentSession 在 ASP.NET 配置系统中注册。
• 在 ASP.NET 中注册的IAsyncDocumentSession 的实现依赖于UserStore<AppUser>。
• ASP.NET 配置系统无法解析IAsyncDocumentSession 注册并抛出异常说明：

在尝试激活“App.Identity.UserStore`1[App.Identity.AppUser]”时无法解析“Raven.Client.IAsyncDocumentSession”类型的服务。

换句话说，当您从 ASP.NET 配置系统解析 LoginController 或 IAsyncDocumentSession 时，您会得到相同的异常。只需调用以下方法之一，您将看到相同的错误：

app.ApplicationServices.GetRequiredService<LoginController>();
// or
app.ApplicationServices.GetRequiredService<IAsyncDocumentSession>();

我认为IAsyncDocumentSession的实现依赖于UserStore<T>或IUserStore<T>，但是你还没有在ASP.NET配置系统中注册。