Question

为长篇致歉！

我正在尝试在aspnet core 2.1中为RabbitMQ构建消息侦听器。发布消息后，我立即在日志中收到此错误：

2018-09-29 12：35：35.459信息NServiceBus.RecoverabilityExecutor立即重试将由于异常而重试消息'ab43'： System.InvalidOperationException：无法解析类型：Event.Processor.Listener.CustomerReceivedHandler，服务名称：---> System.InvalidOperationException：未解决的依赖项[目标类型：Event.Processor.Listener.CustomerReceivedHandler]，[参数：DbProvider（事件。 Processor.Listener.IDbProvider）]，[请求的依赖项：ServiceType：Event.Processor.Listener.IDbProvider，ServiceName：] 在C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ ObjectBuilder \ LightInject \ LightInject.g.cs：line 3443中的LightInject.ServiceContainer.GetEmitMethodForDependency（Dependencydependent）在C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ ObjectBuilder \ LightInject \ LightInject.g.cs：line 3402中的LightInject.ServiceContainer.EmitConstructorDependency（IEmitter发射器，依赖项依赖）中在C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ Object \ Builder \ LightBuilder \ LightInject \ LightInject.g.cs：行3329处的LightInject.ServiceContainer.EmitConstructorDependencies（ConstructionInfo constructionInfo，IEmitter发射器，Action 1 decoratorTargetEmitter) in C:\BuildAgent\work\b549d46003942065\src\NServiceBus.Core\ObjectBuilder\LightInject\LightInject.g.cs:line 3368 at LightInject.ServiceContainer.EmitNewInstanceUsingImplementingType(IEmitter emitter, ConstructionInfo constructionInfo, Action 1 decoratorTargetEmitMethod）处在C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ ObjectBuilder \ LightInject \ LightInject.g.cs：line 3286中的LightInject.ServiceContainer.EmitNewInstance（ServiceRegistration serviceRegistration，IEmitter发射器）处在C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ ObjectBuilder \ LightInject \ LightInject.g.cs：line 3868中的LightInject.ServiceContainer.CreateDynamicMethodDelegate（Action 1 serviceEmitter) in C:\BuildAgent\work\b549d46003942065\src\NServiceBus.Core\ObjectBuilder\LightInject\LightInject.g.cs:line 3030 at LightInject.ServiceContainer.CreateInstanceDelegateIndex(Action 1发射方法）处在C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ ObjectBuilder \ LightInject \ LightInject.g.cs：line 3030中的LightInject.ServiceContainer.EmitLifetime（ServiceRegistration serviceRegistration，Action 1 emitMethod, IEmitter emitter) in C:\BuildAgent\work\b549d46003942065\src\NServiceBus.Core\ObjectBuilder\LightInject\LightInject.g.cs:line 3857 at LightInject.ServiceContainer.<>c__DisplayClass139_0.<CreateEmitMethodWrapper>b__0(IEmitter ms) in C:\BuildAgent\work\b549d46003942065\src\NServiceBus.Core\ObjectBuilder\LightInject\LightInject.g.cs:line 3109 at LightInject.ServiceContainer.CreateDynamicMethodDelegate(Action 1 serviceEmitter）处在C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ ObjectBuilder \ LightInject \ LightInject.g.cs：line 3915中的LightInject.ServiceContainer.CreateDelegate（Type serviceType，String serviceName，Boolean throwError）中 ---内部异常堆栈跟踪的结尾--- 在C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ ObjectBuilder \ LightInject \ LightInject.g.cs：line 3920中的LightInject.ServiceContainer.CreateDelegate（Type serviceType，String serviceName，Boolean throwError）中在C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ ObjectBuilder \ LightInject \ LightInject.g.cs：line 3878中的LightInject.ServiceContainer.CreateDefaultDelegate（Type serviceType，Boolean throwError）中在C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ ObjectBuilder \ LightInject \ LightInject.g.cs：line 2740中的LightInject.ServiceContainer.GetInstance（Type serviceType）在C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ Pipeline \ Incoming \ LoadHandlersConnector.cs：line 45的LightInject.Scope.WithThisScope [T]（Func 1 function) in C:\BuildAgent\work\b549d46003942065\src\NServiceBus.Core\ObjectBuilder\LightInject\LightInject.g.cs:line 6220 at NServiceBus.LoadHandlersConnector.Invoke(IIncomingLogicalMessageContext context, Func 2阶段）处在C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ Pipeline \ Incoming \ DeserializeLogicalMessagesConnector中的NServiceBus.MutateIncomingMessageBehavior.InvokeIncomingMessageMutators（IIncomingLogicalMessageContext context，Func 2 next) in C:\BuildAgent\work\b549d46003942065\src\NServiceBus.Core\MessageMutators\MutateInstanceMessage\MutateIncomingMessageBehavior.cs:line 60 at NServiceBus.DeserializeLogicalMessagesConnector.Invoke(IIncomingPhysicalMessageContext context, Func 2 stage）中。在NServiceBus.UnitOfWorkBehavior.InvokeUnitsOfWork（IIncomingPhysicalMessageContext上下文，Func 2 next) in C:\BuildAgent\work\b549d46003942065\src\NServiceBus.Core\UnitOfWork\UnitOfWorkBehavior.cs:line 40 at NServiceBus.UnitOfWorkBehavior.InvokeUnitsOfWork(IIncomingPhysicalMessageContext context, Func 2下）中的C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ UnitOfWork \ UnitOfWorkBehavior.cs：line 62 在NServiceBus.MutateIncomingTransportMessageBehavior.InvokeIncomingTransportMessagesMutators（IIncomingPhysicalMessageContext上下文，Func 2 next) in C:\BuildAgent\work\b549d46003942065\src\NServiceBus.Core\MessageMutators\MutateTransportMessage\MutateIncomingTransportMessageBehavior.cs:line 59 at NServiceBus.ProcessingStatisticsBehavior.Invoke(IIncomingPhysicalMessageContext context, Func 2下）中的C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ Performance \ Statistics \ ProcessingStatisticsBline 在C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ Pipeline \ Incoming \ TransportReceiveToPhysicalMessageProcessingConnector.cs：line 39处的NServiceBus.TransportReceiveToPhysicalMessageProcessingConnector.Invoke（ITransportReceiveContext上下文，Func`2下一个）处在C：\ BuildAgent \ work \ b549d46003942065 \ src \ NServiceBus.Core \ Pipeline \ MainPipelineExecutor.cs：line 34的NServiceBus.MainPipelineExecutor.Invoke（MessageContext messageContext）处在C：\ BuildAgent \ work \ 15dcdbe5f88af6ed \ src \ NServiceBus.Transport.RabbitMQ \ Receiving \ MessagePump.cs：line 249

中的NServiceBus.Transport.RabbitMQ.MessagePump.Process（BasicDeliverEventArgs message）

csproj：

<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>netcoreapp2.1</TargetFramework>
    <AssemblyName>Event.Processor</AssemblyName>
    <RootNamespace>Event.Processor</RootNamespace>
  </PropertyGroup>
  <ItemGroup>
    <Folder Include="wwwroot\" />
  </ItemGroup>
  <ItemGroup>
    <PackageReference Include="Customer.Models" Version="1.0.21875" />
    <PackageReference Include="lightinject" Version="5.2.0" />
    <PackageReference Include="LightInject.Microsoft.DependencyInjection" Version="2.0.8" />
    <PackageReference Include="Microsoft.AspNetCore.App" />
    <PackageReference Include="nservicebus" Version="7.1.4" />
    <PackageReference Include="NServiceBus.RabbitMQ" Version="5.0.1" />
    <PackageReference Include="odp.netcore" Version="2.0.12" />
    <PackageReference Include="serilog" Version="2.7.1" />
    <PackageReference Include="Serilog.aspnetcore" Version="2.1.1" />
    <PackageReference Include="serilog.settings.configuration" Version="2.6.1" />
    <PackageReference Include="serilog.sinks.console" Version="3.1.1" />
    <PackageReference Include="serilog.sinks.file" Version="4.0.0" />
  </ItemGroup>
  <ItemGroup>
    <Content Update="appsettings.json">
      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
    </Content>
  </ItemGroup>
</Project>

Startup.cs

public class Startup
    {

        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseMvc();

            app.Run(async context =>
            {
                await context.Response.WriteAsync("Hello Processor");
            });
        }

        public IServiceProvider ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();

            ServiceContainer container = new ServiceContainer(new ContainerOptions
                {
                    EnablePropertyInjection = false
                });

            //The below didn't work either!
            //services.AddSingleton<IDbProvider, DbProvider>();
            //services.AddSingleton<IConfigSettings, ConfigSettings>();
            //services.AddSingleton<IEncryptor, Encryptor>();

            container.Register<IDbProvider, DbProvider>();
            container.Register<IConfigSettings, ConfigSettings>();
            container.Register<IEncryptor, Encryptor>();

            return container.CreateServiceProvider(services);
        }
    }

Program.cs

public class Program
    {
        public static void Main(string[] args)

            try
            {
                var endpointConfiguration = new EndpointConfiguration("MSG_QUEUE");
                var transport = endpointConfiguration.UseTransport<RabbitMQTransport>();
                transport.UseConventionalRoutingTopology();
                transport.ConnectionString("ConxnString");
                endpointConfiguration.EnableInstallers();
                endpointConfiguration.SendFailedMessagesTo("error");
                endpointConfiguration.AutoSubscribe();
                endpointConfiguration.UsePersistence<InMemoryPersistence>();
                endpointConfiguration.UseSerialization<XmlSerializer>();

                Endpoint.Start(endpointConfiguration).GetAwaiter().GetResult();
                //IEndpointInstance endpointInstance = Endpoint.Start(endpointConfiguration).GetAwaiter().GetResult();
                //endpointInstance.Stop().ConfigureAwait(false);

                //Log.Information("Starting web host");
                CreateWebHostBuilder(args).Build().Run();
            }
            catch (Exception ex)
            {
                //Log.Fatal(ex, "Host terminated unexpectedly");
            }
            finally
            {
                //Log.CloseAndFlush();
            }
        }

        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>();
    }

MessageHandler.cs

public class CustomerReceivedHandler : IHandleMessages<PubSubObject>
    {
        private readonly IDbProvider _DbProvider;
        private static readonly ILog Log = LogManager.GetLogger<CustomerReceivedHandler>();

        public CustomerReceivedHandler(IDbProvider DbProvider)
        {
            _DbProvider = DbProvider;
            // If I don't inject and initialize as below, it works fine
            //_DbProvider = new DbProvider(new ConfigSettings(new Encryptor());
        }

        public Task Handle(PubSubObject message, IMessageHandlerContext context)
        {
            Log.Info($"Received message with id {context.MessageId}");
    }
}

Answer 1

显然我应该使用以下代码：

endpointConfiguration.UseContainer<ServicesBuilder>(
                customizations: customizations =>
                {
                    customizations.ExistingServices(services);
                });

我关注了https://docs.particular.net/samples/dependency-injection/aspnetcore/

带lightinject的aspnet核心中未解决的DI

1 个答案: