Registering Autofac & AutoMapper Circularly

Autofac.AutoMapper.Program.cs

public static void Main(string[] args)
{
    var components = RegisterComponents();

    Run(components);
}

private static IContainer RegisterComponents()
{
    var builder = new ContainerBuilder();

    builder.RegisterType<PreMapperComponent>().As<IPreMapperComponent>();

    builder.Register(ConfigureMapper).SingleInstance();

    builder.RegisterType<PostMapperComponent>().As<IPostMapperComponent>();

    return builder.Build();
}

private static void Run(IContainer container)
{
    var mapper = container.Resolve<IMapper>();

    var source = new EntityType(123, "Test-text", "Test-description");

    var dto = mapper.Map<DtoType>(source);

    dto.RunComponents();
}

private static IMapper ConfigureMapper(IComponentContext context)
{
    var configuration = new MapperConfiguration(config =>
    {
        var ctx = context.Resolve<IComponentContext>();

        config.CreateMap<EntityType, DtoType>()
            .ConstructUsing(_ =>
                new DtoType(ctx.Resolve<IPreMapperComponent>(), ctx.Resolve<IPostMapperComponent>()));
    });

    return configuration.CreateMapper();
}

Components.cs

public interface IPreMapperComponent
{
    void Run();
}

public class PreMapperComponent : IPreMapperComponent
{
    public void Run()
    {
        Console.WriteLine("PreMapperComponent.Run executed.");
    }
}

public interface IPostMapperComponent
{
    void Run();
}

public class PostMapperComponent : IPostMapperComponent
{
    public void Run()
    {
        Console.WriteLine("PostMapperComponent.Run executed.");
    }
}

Types.cs

public class DtoType
{
    private readonly IPostMapperComponent _postComponent;
    private readonly IPreMapperComponent _preComponent;

    public DtoType(IPreMapperComponent preComponent, IPostMapperComponent postComponent)
    {
        _preComponent = preComponent;
        _postComponent = postComponent;
    }

    public int Id { get; set; }

    public string Text { get; set; }

    public void RunComponents()
    {
        _preComponent.Run();
        _postComponent.Run();
    }
}

public class EntityType
{
    public EntityType(int id, string text, string description)
    {
        Id = id;
        Text = text;
        Description = description;
    }

    public int Id { get; set; }

    public string Description { get; set; }

    public string Text { get; set; }
}