Question

我对这种概念是陌生的，因此我对此颇为执着（解释一下我的目标是什么）。

我在rest网络api中有以下代码：

UnitOfWorkProvider.cs

    public class UnitOfWorkProvider : IUnitOfWorkProvider
{
    private readonly Func<AppDbContext> getDbContext;

    public UnitOfWorkProvider(Func<AppDbContext> getDbContext)
    {
        this.getDbContext = getDbContext;
    }

    public IUnitOfWork Get()
    {
        return new AppUnitOfWork(this.getDbContext());
    }
}

SimpleInjectorConfiguration.cs

        internal static void Configure(this Container container, IConfigurationRoot configuration, IApplicationBuilder app, ILoggerFactory loggerFactory, IHttpContextAccessor httpContextAccessor, IMemoryCache memoryCache)
    {
        InitializeInjectorContainer(container, configuration, app, loggerFactory, httpContextAccessor, memoryCache);
    }

    private static void InitializeInjectorContainer(Container container, IConfigurationRoot configuration, IApplicationBuilder app, ILoggerFactory loggerFactory, IHttpContextAccessor httpContextAccessor, IMemoryCache memoryCache)
    {
        container.Register<IUnitOfWorkProvider>(() => new UnitOfWorkProvider(() => new AppDbContext(configuration.GetConnectionString("AppDbContext"))), Lifestyle.Scoped);

        ...
    }

在Startup.cs上调用的

        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, IHttpContextAccessor httpContextAccessor, IMemoryCache memoryCache)
    {
        // Configure and register Simple Injector
        simpleInjectorContainer.Configure(configuration, app, loggerFactory, httpContextAccessor, memoryCache);
        ...
    }

我的目的是在SimpleInjectorConfiguration.cs中注册这样的IUnitOfWorkProvider：

container.Register<IUnitOfWorkProvider>();

并稍后在JWT OnTokenValidated事件上实例化它，当我从请求中的声明中获取数据库名称时：

            services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
            .AddJwtBearer(options =>
            {
                options.Events = new JwtBearerEvents()
                {
                    OnTokenValidated = context =>
                    {
                        // get database name from claims in request

                        // something like this to set the context. this doesnt work.
                        container.GetInstance<IUnitOfWorkProvider>(() => new UnitOfWorkProvider(() => new AppDbContext(SetConnectionString(dbNameFromClaim))), Lifestyle.Scoped);
                        return Task.CompletedTask;
                    }
                };
            });

非常感谢谁可以帮助我！：）

JWT和简单注射器。设置连接字符串OnTokenValidated

0 个答案: