やること

ASP.NET Core Web Applicationで、IServiceProvider(DIコンテナ)に登録されるコンポーネントの情報を確認してみます。

環境

Visual Strudio 2015
ASP.NET Core Web Application (.NET Core)を「認証なし」で作成し、1.1化した状態

手順

Startupクラスに下記のようなShowComponents()メソッドを追加し、ConfigureServices()の最後で呼び出します。

public void ConfigureServices(IServiceCollection services)
{
    // Add framework services.
    services.AddMvc();

    ShowComponents(services);
}

private static void ShowComponents(IServiceCollection services)
{
    foreach (var service in services)
    {
        if (service.ImplementationType != null)
        {
            Debug.WriteLine(
                "Type\t{0}\t{1}\t{2}",
                service.Lifetime,
                service.ServiceType,
                service.ServiceType == service.ImplementationType ? "-" : service.ImplementationType.ToString());
        }
        else if (service.ImplementationFactory != null)
        {
            Debug.WriteLine(
                "Factory\t{0}\t{1}",
                service.Lifetime,
                service.ServiceType);
        }
        else
        {
            Debug.WriteLine(
                "Constant\t{0}\t{1}\t{2}",
                service.Lifetime,
                service.ServiceType,
                service.ImplementationInstance.GetType());
        }
    }
}

上記により、IServiceProviderに登録されるコンポーネントの情報がわかります。

登録されるコンポーネントのインスタンス解決方法については、以下の3種類があります。

種別	概要
Type	ImplementationTypeのTypeを元にインスタンスを生成
Factory	ImplementationFactory(Func)による生成
Constant	ImplementationInstanceへの参照

また、ライフサイクルについては以下の三種類があります。

種別	概要
Singleton	単一のインスタンスが返される
Transient	要求毎にインスタンスが生成される
Scoped	同一リクエスト中は同じインスタンスが返される

出力結果

AddMvc()しただけのプロジェクトでの出力結果を以下に載せておきます。

種別	ライフサイクル	キーとなる型	解決されるインスタンスの型
Constant	Singleton	M.A.Hosting.IApplicationLifetime	M.A.Hosting.Internal.ApplicationLifetime
Constant	Singleton	M.A.Hosting.IHostingEnvironment	M.A.Hosting.Internal.HostingEnvironment
Constant	Singleton	M.A.Hosting.IStartupFilter	M.A.Server.IISIntegration.IISSetupFilter
Constant	Singleton	M.A.Mvc.ApplicationParts.ApplicationPartManager	M.A.Mvc.ApplicationParts.ApplicationPartManager
Constant	Singleton	M.E.Logging.ILoggerFactory	M.E.Logging.LoggerFactory
Constant	Singleton	M.E.Options.IConfigureOptions`1[M.A.Builder.ForwardedHeadersOptions]	M.E.Options.ConfigureOptions`1[M.A.Builder.ForwardedHeadersOptions]
Constant	Singleton	S.Buffers.ArrayPool`1[M.A.Mvc.ViewFeatures.Internal.ViewBufferValue]	S.Buffers.DefaultArrayPool`1[M.A.Mvc.ViewFeatures.Internal.ViewBufferValue]
Constant	Singleton	S.Buffers.ArrayPool`1[S.Byte]	S.Buffers.DefaultArrayPool`1[S.Byte]
Constant	Singleton	S.Buffers.ArrayPool`1[S.Char]	S.Buffers.DefaultArrayPool`1[S.Char]
Constant	Singleton	S.Diagnostics.DiagnosticListener	S.Diagnostics.DiagnosticListener
Constant	Singleton	S.Diagnostics.DiagnosticSource	S.Diagnostics.DiagnosticListener
Constant	Singleton	S.Text.Encodings.Web.UrlEncoder	S.Text.Encodings.Web.DefaultUrlEncoder
Factory	Singleton	M.A.DataProtection.AuthenticatedEncryption.ConfigurationModel.IAuthenticatedEncryptorConfiguration
Factory	Singleton	M.A.DataProtection.IDataProtectionProvider
Factory	Singleton	M.A.DataProtection.KeyManagement.IKeyManager
Factory	Singleton	M.A.DataProtection.KeyManagement.Internal.IDefaultKeyServices
Factory	Singleton	M.A.Hosting.IStartup
Factory	Singleton	M.A.Mvc.Formatters.JsonOutputFormatter
Factory	Singleton	M.A.Mvc.ModelBinding.Validation.IObjectModelValidator
Factory	Singleton	M.A.Mvc.Razor.Directives.IChunkTreeCache
Factory	Singleton	M.A.Razor.Runtime.TagHelpers.ITagHelperDescriptorFactory
Factory	Singleton	M.E.ObjectPool.ObjectPool`1[M.A.Antiforgery.Internal.AntiforgerySerializationContext]
Factory	Singleton	M.E.ObjectPool.ObjectPool`1[M.A.Routing.Internal.UriBuildingContext]
Factory	Singleton	S.Text.Encodings.Web.HtmlEncoder
Factory	Singleton	S.Text.Encodings.Web.JavaScriptEncoder
Factory	Transient	M.A.Mvc.ModelBinding.Metadata.ICompositeMetadataDetailsProvider
Factory	Transient	M.E.Options.IConfigureOptions`1[M.A.DataProtection.DataProtectionOptions]
Type	Scoped	M.A.Mvc.ViewFeatures.Internal.IViewBufferScope	M.A.Mvc.ViewFeatures.Internal.MemoryPoolViewBufferScope
Type	Scoped	M.E.Options.IOptionsSnapshot`1[TOptions]	M.E.Options.OptionsSnapshot`1[TOptions]
Type	Singleton	M.A.Antiforgery.IAntiforgery	M.A.Antiforgery.Internal.DefaultAntiforgery
Type	Singleton	M.A.Antiforgery.IAntiforgeryAdditionalDataProvider	M.A.Antiforgery.Internal.DefaultAntiforgeryAdditionalDataProvider
Type	Singleton	M.A.Antiforgery.Internal.IAntiforgeryTokenGenerator	M.A.Antiforgery.Internal.DefaultAntiforgeryTokenGenerator
Type	Singleton	M.A.Antiforgery.Internal.IAntiforgeryTokenSerializer	M.A.Antiforgery.Internal.DefaultAntiforgeryTokenSerializer
Type	Singleton	M.A.Antiforgery.Internal.IAntiforgeryTokenStore	M.A.Antiforgery.Internal.DefaultAntiforgeryTokenStore
Type	Singleton	M.A.Antiforgery.Internal.IClaimUidExtractor	M.A.Antiforgery.Internal.DefaultClaimUidExtractor
Type	Singleton	M.A.DataProtection.Internal.IActivator	M.A.DataProtection.RC1ForwardingActivator
Type	Singleton	M.A.DataProtection.Internal.IActivator	M.A.DataProtection.RC1ForwardingActivator
Type	Singleton	M.A.DataProtection.Internal.IActivator	M.A.DataProtection.RC1ForwardingActivator
Type	Singleton	M.A.DataProtection.Internal.IActivator	M.A.DataProtection.RC1ForwardingActivator
Type	Singleton	M.A.Hosting.Server.IServer	M.A.Server.Kestrel.KestrelServer
Type	Singleton	M.A.Mvc.ApiExplorer.IApiDescriptionGroupCollectionProvider	M.A.Mvc.ApiExplorer.ApiDescriptionGroupCollectionProvider
Type	Singleton	M.A.Mvc.Controllers.IControllerFactory	M.A.Mvc.Controllers.DefaultControllerFactory
Type	Singleton	M.A.Mvc.DataAnnotations.IValidationAttributeAdapterProvider	M.A.Mvc.DataAnnotations.Internal.ValidationAttributeAdapterProvider
Type	Singleton	M.A.Mvc.Filters.IFilterProvider	M.A.Mvc.Internal.DefaultFilterProvider
Type	Singleton	M.A.Mvc.Formatters.FormatFilter	-
Type	Singleton	M.A.Mvc.Formatters.Json.Internal.JsonResultExecutor	-
Type	Singleton	M.A.Mvc.Infrastructure.IActionDescriptorCollectionProvider	M.A.Mvc.Internal.ActionDescriptorCollectionProvider
Type	Singleton	M.A.Mvc.Infrastructure.IActionInvokerFactory	M.A.Mvc.Internal.ActionInvokerFactory
Type	Singleton	M.A.Mvc.Infrastructure.IActionSelector	M.A.Mvc.Internal.ActionSelector
Type	Singleton	M.A.Mvc.Internal.ActionConstraintCache	-
Type	Singleton	M.A.Mvc.Internal.ClientValidatorCache	-
Type	Singleton	M.A.Mvc.Internal.ContentResultExecutor	-
Type	Singleton	M.A.Mvc.Internal.ControllerActionInvokerCache	-
Type	Singleton	M.A.Mvc.Internal.FileContentResultExecutor	-
Type	Singleton	M.A.Mvc.Internal.FileStreamResultExecutor	-
Type	Singleton	M.A.Mvc.Internal.IActionSelectorDecisionTreeProvider	M.A.Mvc.Internal.ActionSelectorDecisionTreeProvider
Type	Singleton	M.A.Mvc.Internal.IControllerArgumentBinder	M.A.Mvc.Internal.DefaultControllerArgumentBinder
Type	Singleton	M.A.Mvc.Internal.IHttpRequestStreamReaderFactory	M.A.Mvc.Internal.MemoryPoolHttpRequestStreamReaderFactory
Type	Singleton	M.A.Mvc.Internal.IHttpResponseStreamWriterFactory	M.A.Mvc.Internal.MemoryPoolHttpResponseStreamWriterFactory
Type	Singleton	M.A.Mvc.Internal.ITypeActivatorCache	M.A.Mvc.Internal.TypeActivatorCache
Type	Singleton	M.A.Mvc.Internal.LocalRedirectResultExecutor	-
Type	Singleton	M.A.Mvc.Internal.MiddlewareFilterBuilder	-
Type	Singleton	M.A.Mvc.Internal.MiddlewareFilterConfigurationProvider	-
Type	Singleton	M.A.Mvc.Internal.MvcMarkerService	-
Type	Singleton	M.A.Mvc.Internal.MvcRouteHandler	-
Type	Singleton	M.A.Mvc.Internal.ObjectResultExecutor	-
Type	Singleton	M.A.Mvc.Internal.PhysicalFileResultExecutor	-
Type	Singleton	M.A.Mvc.Internal.RedirectResultExecutor	-
Type	Singleton	M.A.Mvc.Internal.RedirectToActionResultExecutor	-
Type	Singleton	M.A.Mvc.Internal.RedirectToRouteResultExecutor	-
Type	Singleton	M.A.Mvc.Internal.VirtualFileResultExecutor	-
Type	Singleton	M.A.Mvc.ModelBinding.IModelBinderFactory	M.A.Mvc.ModelBinding.ModelBinderFactory
Type	Singleton	M.A.Mvc.ModelBinding.IModelMetadataProvider	M.A.Mvc.ModelBinding.Metadata.DefaultModelMetadataProvider
Type	Singleton	M.A.Mvc.Razor.Compilation.ICompilationService	M.A.Mvc.Razor.Internal.DefaultRoslynCompilationService
Type	Singleton	M.A.Mvc.Razor.Internal.CSharpCompiler	-
Type	Singleton	M.A.Mvc.Razor.Internal.ICompilerCacheProvider	M.A.Mvc.Razor.Internal.DefaultCompilerCacheProvider
Type	Singleton	M.A.Mvc.Razor.Internal.IRazorViewEngineFileProviderAccessor	M.A.Mvc.Razor.Internal.DefaultRazorViewEngineFileProviderAccessor
Type	Singleton	M.A.Mvc.Razor.Internal.RazorReferenceManager	-
Type	Singleton	M.A.Mvc.Razor.Internal.ViewComponentTagHelperDescriptorResolver	-
Type	Singleton	M.A.Mvc.Razor.IRazorPageActivator	M.A.Mvc.Razor.RazorPageActivator
Type	Singleton	M.A.Mvc.Razor.IRazorViewEngine	M.A.Mvc.Razor.RazorViewEngine
Type	Singleton	M.A.Mvc.Razor.ITagHelperActivator	M.A.Mvc.Razor.Internal.DefaultTagHelperActivator
Type	Singleton	M.A.Mvc.Razor.ITagHelperFactory	M.A.Mvc.Razor.Internal.DefaultTagHelperFactory
Type	Singleton	M.A.Mvc.Rendering.IJsonHelper	M.A.Mvc.ViewFeatures.JsonHelper
Type	Singleton	M.A.Mvc.Routing.IUrlHelperFactory	M.A.Mvc.Routing.UrlHelperFactory
Type	Singleton	M.A.Mvc.TagHelpers.Cache.IDistributedCacheTagHelperService	M.A.Mvc.TagHelpers.Cache.DistributedCacheTagHelperService
Type	Singleton	M.A.Mvc.ViewComponents.IViewComponentActivator	M.A.Mvc.ViewComponents.DefaultViewComponentActivator
Type	Singleton	M.A.Mvc.ViewComponents.IViewComponentDescriptorCollectionProvider	M.A.Mvc.ViewComponents.DefaultViewComponentDescriptorCollectionProvider
Type	Singleton	M.A.Mvc.ViewComponents.IViewComponentFactory	M.A.Mvc.ViewComponents.DefaultViewComponentFactory
Type	Singleton	M.A.Mvc.ViewComponents.IViewComponentInvokerFactory	M.A.Mvc.ViewComponents.DefaultViewComponentInvokerFactory
Type	Singleton	M.A.Mvc.ViewComponents.IViewComponentSelector	M.A.Mvc.ViewComponents.DefaultViewComponentSelector
Type	Singleton	M.A.Mvc.ViewEngines.ICompositeViewEngine	M.A.Mvc.ViewEngines.CompositeViewEngine
Type	Singleton	M.A.Mvc.ViewFeatures.IHtmlGenerator	M.A.Mvc.ViewFeatures.DefaultHtmlGenerator
Type	Singleton	M.A.Mvc.ViewFeatures.IModelExpressionProvider	M.A.Mvc.ViewFeatures.ModelExpressionProvider
Type	Singleton	M.A.Mvc.ViewFeatures.Internal.AutoValidateAntiforgeryTokenAuthorizationFilter	-
Type	Singleton	M.A.Mvc.ViewFeatures.Internal.ExpressionTextCache	-
Type	Singleton	M.A.Mvc.ViewFeatures.Internal.PartialViewResultExecutor	-
Type	Singleton	M.A.Mvc.ViewFeatures.Internal.SaveTempDataFilter	-
Type	Singleton	M.A.Mvc.ViewFeatures.Internal.ValidateAntiforgeryTokenAuthorizationFilter	-
Type	Singleton	M.A.Mvc.ViewFeatures.Internal.ViewComponentInvokerCache	-
Type	Singleton	M.A.Mvc.ViewFeatures.Internal.ViewComponentResultExecutor	-
Type	Singleton	M.A.Mvc.ViewFeatures.Internal.ViewResultExecutor	-
Type	Singleton	M.A.Mvc.ViewFeatures.ITempDataDictionaryFactory	M.A.Mvc.ViewFeatures.TempDataDictionaryFactory
Type	Singleton	M.A.Mvc.ViewFeatures.ITempDataProvider	M.A.Mvc.ViewFeatures.SessionStateTempDataProvider
Type	Singleton	M.A.Mvc.ViewFeatures.ValidationHtmlAttributeProvider	M.A.Mvc.ViewFeatures.DefaultValidationHtmlAttributeProvider
Type	Singleton	M.A.Razor.Compilation.TagHelpers.ITagHelperDescriptorResolver	M.A.Mvc.Razor.Internal.CompositeTagHelperDescriptorResolver
Type	Singleton	M.A.Razor.Runtime.TagHelpers.ITagHelperTypeResolver	M.A.Razor.Runtime.TagHelpers.TagHelperTypeResolver
Type	Singleton	M.A.Razor.Runtime.TagHelpers.TagHelperDescriptorResolver	-
Type	Singleton	M.A.Routing.Internal.RoutingMarkerService	-
Type	Singleton	M.E.Caching.Distributed.IDistributedCache	M.E.Caching.Distributed.MemoryDistributedCache
Type	Singleton	M.E.Caching.Memory.IMemoryCache	M.E.Caching.Memory.MemoryCache
Type	Singleton	M.E.Logging.ILogger`1[TCategoryName]	M.E.Logging.Logger`1[T]
Type	Singleton	M.E.ObjectPool.ObjectPoolProvider	M.E.ObjectPool.DefaultObjectPoolProvider
Type	Singleton	M.E.Options.IOptions`1[TOptions]	M.E.Options.OptionsManager`1[TOptions]
Type	Singleton	M.E.Options.IOptionsMonitor`1[TOptions]	M.E.Options.OptionsMonitor`1[TOptions]
Type	Transient	M.A.Authorization.IAuthorizationEvaluator	M.A.Authorization.DefaultAuthorizationEvaluator
Type	Transient	M.A.Authorization.IAuthorizationHandler	M.A.Authorization.Infrastructure.PassThroughAuthorizationHandler
Type	Transient	M.A.Authorization.IAuthorizationHandlerContextFactory	M.A.Authorization.DefaultAuthorizationHandlerContextFactory
Type	Transient	M.A.Authorization.IAuthorizationPolicyProvider	M.A.Authorization.DefaultAuthorizationPolicyProvider
Type	Transient	M.A.Authorization.IAuthorizationService	M.A.Authorization.DefaultAuthorizationService
Type	Transient	M.A.Cors.Infrastructure.ICorsPolicyProvider	M.A.Cors.Infrastructure.DefaultCorsPolicyProvider
Type	Transient	M.A.Cors.Infrastructure.ICorsService	M.A.Cors.Infrastructure.CorsService
Type	Transient	M.A.Hosting.Builder.IApplicationBuilderFactory	M.A.Hosting.Builder.ApplicationBuilderFactory
Type	Transient	M.A.Hosting.IStartupFilter	M.A.Hosting.Internal.AutoRequestServicesStartupFilter
Type	Transient	M.A.Http.IHttpContextFactory	M.A.Http.HttpContextFactory
Type	Transient	M.A.Mvc.Abstractions.IActionDescriptorProvider	M.A.Mvc.Internal.ControllerActionDescriptorProvider
Type	Transient	M.A.Mvc.Abstractions.IActionInvokerProvider	M.A.Mvc.Internal.ControllerActionInvokerProvider
Type	Transient	M.A.Mvc.ActionConstraints.IActionConstraintProvider	M.A.Mvc.Internal.DefaultActionConstraintProvider
Type	Transient	M.A.Mvc.ApiExplorer.IApiDescriptionProvider	M.A.Mvc.ApiExplorer.DefaultApiDescriptionProvider
Type	Transient	M.A.Mvc.ApplicationModels.IApplicationModelProvider	M.A.Mvc.Cors.Internal.CorsApplicationModelProvider
Type	Transient	M.A.Mvc.ApplicationModels.IApplicationModelProvider	M.A.Mvc.Internal.AuthorizationApplicationModelProvider
Type	Transient	M.A.Mvc.ApplicationModels.IApplicationModelProvider	M.A.Mvc.Internal.DefaultApplicationModelProvider
Type	Transient	M.A.Mvc.Controllers.IControllerActivator	M.A.Mvc.Controllers.DefaultControllerActivator
Type	Transient	M.A.Mvc.Cors.CorsAuthorizationFilter	-
Type	Transient	M.A.Mvc.Internal.IControllerPropertyActivator	M.A.Mvc.Internal.DefaultControllerPropertyActivator
Type	Transient	M.A.Mvc.Internal.IControllerPropertyActivator	M.A.Mvc.ViewFeatures.ViewDataDictionaryControllerPropertyActivator
Type	Transient	M.A.Mvc.Internal.MvcAttributeRouteHandler	-
Type	Transient	M.A.Mvc.IViewComponentHelper	M.A.Mvc.ViewComponents.DefaultViewComponentHelper
Type	Transient	M.A.Mvc.Razor.Compilation.IRazorCompilationService	M.A.Mvc.Razor.Internal.RazorCompilationService
Type	Transient	M.A.Mvc.Razor.IMvcRazorHost	M.A.Mvc.Razor.MvcRazorHost
Type	Transient	M.A.Mvc.Razor.IRazorPageFactoryProvider	M.A.Mvc.Razor.Internal.DefaultRazorPageFactoryProvider
Type	Transient	M.A.Mvc.Rendering.IHtmlHelper	M.A.Mvc.ViewFeatures.HtmlHelper
Type	Transient	M.A.Mvc.Rendering.IHtmlHelper`1[TModel]	M.A.Mvc.ViewFeatures.HtmlHelper`1[TModel]
Type	Transient	M.A.Mvc.TagHelpers.Cache.IDistributedCacheTagHelperFormatter	M.A.Mvc.TagHelpers.Cache.DistributedCacheTagHelperFormatter
Type	Transient	M.A.Mvc.TagHelpers.Cache.IDistributedCacheTagHelperStorage	M.A.Mvc.TagHelpers.Cache.DistributedCacheTagHelperStorage
Type	Transient	M.A.Mvc.ViewComponents.IViewComponentDescriptorProvider	M.A.Mvc.ViewComponents.DefaultViewComponentDescriptorProvider
Type	Transient	M.A.Routing.IInlineConstraintResolver	M.A.Routing.DefaultInlineConstraintResolver
Type	Transient	M.A.Routing.Tree.TreeRouteBuilder	-
Type	Transient	M.E.DependencyInjection.IServiceProviderFactory`1[M.E.DependencyInjection.IServiceCollection]	M.E.DependencyInjection.DefaultServiceProviderFactory
Type	Transient	M.E.Options.IConfigureOptions`1[M.A.Antiforgery.AntiforgeryOptions]	M.A.Antiforgery.Internal.AntiforgeryOptionsSetup
Type	Transient	M.E.Options.IConfigureOptions`1[M.A.Mvc.MvcOptions]	M.A.Mvc.DataAnnotations.Internal.MvcDataAnnotationsMvcOptionsSetup
Type	Transient	M.E.Options.IConfigureOptions`1[M.A.Mvc.MvcOptions]	M.A.Mvc.Formatters.Json.Internal.MvcJsonMvcOptionsSetup
Type	Transient	M.E.Options.IConfigureOptions`1[M.A.Mvc.MvcOptions]	M.A.Mvc.Internal.MvcCoreMvcOptionsSetup
Type	Transient	M.E.Options.IConfigureOptions`1[M.A.Mvc.MvcOptions]	M.A.Mvc.ViewFeatures.Internal.TempDataMvcOptionsSetup
Type	Transient	M.E.Options.IConfigureOptions`1[M.A.Mvc.MvcViewOptions]	M.A.Mvc.Razor.Internal.MvcRazorMvcViewOptionsSetup
Type	Transient	M.E.Options.IConfigureOptions`1[M.A.Mvc.MvcViewOptions]	M.A.Mvc.ViewFeatures.Internal.MvcViewOptionsSetup
Type	Transient	M.E.Options.IConfigureOptions`1[M.A.Mvc.Razor.RazorViewEngineOptions]	M.A.Mvc.Razor.Internal.DependencyContextRazorViewEngineOptionsSetup
Type	Transient	M.E.Options.IConfigureOptions`1[M.A.Mvc.Razor.RazorViewEngineOptions]	M.A.Mvc.RazorViewEngineOptionsSetup
Type	Transient	M.E.Options.IConfigureOptions`1[M.A.Routing.RouteOptions]	M.A.Mvc.Internal.MvcCoreRouteOptionsSetup
Type	Transient	M.E.Options.IConfigureOptions`1[M.A.Server.Kestrel.KestrelServerOptions]	M.A.Server.Kestrel.Internal.KestrelServerOptionsSetup

順序についてはソート済みで、名前空間は一部略記にしてあります。

名前空間の略記は、「M.A」が「Microsoft.AspNetCore」、「M.E」が「Microsoft.Extensions」、「S」が「System」の略になります。

一部、同一の情報が登録されているものがありますが、これはAddXxx()メソッド内などにおいて、それぞれの処理が必要とするコンポーネントの情報が個別に登録されているためです。

ASP.NET Coreでは同一の登録情報が複数件あった場合、そのうちの1件の情報を元にインスタンスの解決が行われることを想定しています。

標準のIServiceProvider(Microsoft.Extensions.DependencyInjection)では最後に登録された情報が使用されます。

うさコメ

色々なAddXxx()をした状態で登録されているものを確認してみると面白いかも(・ω・)