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向现有辅助服务项目添加ASPNET API

backgroundworker .net-core asp.net-core c#

mclayton · 技术社区 · 5 年前

我目前有一个dotnet5.0工作者服务项目,它托管一个后台服务,定期执行一个业务流程。我设法摸索着在一个房间里安排了一个主人 CreateHostBuilder 方法,并且作为docker容器中的可执行文件,这一切都运行良好。

ConfigureServices 方法绑定到在我指定的端口上的ASPNET razor项目中定义的类,但在多次尝试之后,我有点纠结于如何开始处理这个问题,更不用说让它实际工作了:-(。

我的工人.csproj

<Project Sdk="Microsoft.NET.Sdk.Worker">

  <PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="5.0.0" />
    <PackageReference Include="Microsoft.Extensions.Hosting" Version="5.0.0" />
    <PackageReference Include="Serilog.Extensions.Hosting" Version="4.0.0-dev-00051" />
    <PackageReference Include="Serilog.Formatting.Compact" Version="1.1.1-dev-00940" />
    <PackageReference Include="Serilog.Sinks.Console" Version="4.0.0-dev-00839" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\MyAppCode\MyAppCode.csproj" />
  </ItemGroup>

</Project>

和一个 程序.cs 看起来是这样的:

        public static void Main(string[] args)
        {

            Program.InitSerilog();
            Program.CreateHostBuilder(args).Build().Run();

        }

        public static void InitSerilog()
        {
            ... do stuff ...
        }

        public static IHostBuilder CreateHostBuilder(string[] args)
        {
            return new HostBuilder()
                // worker service config
                .ConfigureLogging((context, builder) =>
                {
                    builder.SetMinimumLevel(LogLevel.Trace);
                })
                .ConfigureServices(services =>
                {
                    services.AddHostedService<MyAppService>();
                    services.AddSingleton<AppSettings>(
                        serviceProvider => { return Program.CreateAppSettings(); }
                    );
                })
                .UseSerilog();
        }

        private static AppSettings CreateAppSettings()
        {
            ... bind to environment variables and return ...
        }

    }

    public sealed class MyAppService: BackgroundService
    {

        public MyAppService(ILogger<MyAppService> logger, AppSettings appSettings)
            : base()
        {
            ... do stuff ...
        }

        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {
            ... keep doing the main business process in a timed loop ...
        }

        #endregion
    }

我找到了很多示例,说明如何将辅助服务添加到现有的ASPNET项目,或者如何将ASPNET项目作为Windows服务宿主,但没有找到任何关于如何将ASPNET站点侦听器添加到现有辅助服务的示例。

喜欢我们要做的就是在一个新的c#项目中构建WebUI/api,并以某种方式将其插入现有的c#项目中程序.cs所以它在主后台服务运行时监听指定的端口,但也许我只是走错路了?

CreateHostBuilder 方法,所以请随时告诉我将其恢复为默认值,如果这是一个简单的答案:-)。

感谢您的帮助/指点。。。

0 回复 | 直到 5 年前

nunohpinheiro 5 年前

首先,我建议你改变主意 <Project Sdk="Microsoft.NET.Sdk.Worker"> 进入之内 <Project Sdk="Microsoft.NET.Sdk.Web">

CreateHostBuilder Startup 班级:

public static IHostBuilder CreateHostBuilder(string[] args)
{
    return new HostBuilder()
        .ConfigureLogging((context, builder) =>
        {
            builder.SetMinimumLevel(LogLevel.Trace);
        })
        .ConfigureWebHostDefaults(webBuilder =>
        {
            webBuilder.UseStartup<Startup>();
        })
        .UseSerilog();
}

在你的

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }
    
    public IConfiguration Configuration { get; }
    
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddHttpContextAccessor();
        services.AddAuthorization();

        // worker service config
        services.AddHostedService<MyAppService>();
        services.AddSingleton<AppSettings>(
            serviceProvider => { return Program.CreateAppSettings(); } // this method could be relocated too
        );

        // example for health checks
        services.AddHealthChecks();
    }

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        
        app.UseRouting();
        app.UseAuthorization();
        app.UseEndpoints(endpoints =>
        {
            // example for health checks
            endpoints.MapHealthChecks("/health", new HealthCheckOptions
            {
                Predicate = _ => true,
                ResponseWriter = UIResponseWriter.WriteHealthCheckUIResponse
            });
        });
    }
}