.net 8.0 批量注册服务-封装底层实现

1. 现在有多个服务需要注册到IOC中，传统注册的做法就是有N个服务（不同的注册类型），就得注册N次。

builder.Services.AddScoped<IRabbitMqConnectionFactory, RabbitMqConnectionFactory>();
builder.Services.AddScoped<IOrderService, OrderService>();

2. 创建一个类库MK.Registry.DI

   项目结构

1

• 分别定义三个注册类型的接口，IScoped，ISingleton，ITransient.
• 核心=》批量注入服务的扩展类

  public static void BatchRegisterService(this IServiceCollection services)
  {
      var path = AppDomain.CurrentDomain.RelativeSearchPath ?? AppDomain.CurrentDomain.BaseDirectory;
      var assemblys = System.IO.Directory.GetFiles(path, "*.dll").Select(Assembly.LoadFrom).ToArray();
      List<Type> typeList = new List<Type>();
      foreach (var assembly in assemblys)
      {
          var types = assembly.GetTypes();
          var list = types.Where(u => u.IsClass && !u.IsAbstract && !u.IsGenericType
          && (typeof(ITransient).IsAssignableFrom(u)
          || typeof(IScoped).IsAssignableFrom(u)
          || typeof(ISingleton).IsAssignableFrom(u))).ToList();
          foreach (var type in list)
          {
              var interfaceList = type.GetInterfaces();
              if (interfaceList.Any())
              {
                  var inter = interfaceList.First();
                  if (typeof(ITransient).IsAssignableFrom(type))
                      services.AddTransient(inter, type);
                  else if (typeof(IScoped).IsAssignableFrom(type))
                      services.AddScoped(inter, type);
                  else
                      services.AddSingleton(inter, type);
              }
          }
      }
  }

3.  在应用项目中引入类库using MK.Registry.DI; 以IScoped为例；

•       实现类中继承IScoped

   public class RabbitMqConnectionFactory:IRabbitMqConnectionFactory, IScoped
   public class OrderService : IOrderService, IScoped

• 批量注册继承IScoped的服务

  builder.Services.BatchRegisterService();
  
  ​