将ServiceStack请求转发给其他服务处理程序

Question

我要求让一个服务处理请求,将其转换为其他请求,将该请求传递给内部服务,获取响应,然后将其转换回外部服务响应.有些代码可能会更好地解释它.这就是我所做的:

public class InviteUserService : Service, IPost<Invitee>
{
    public RegistrationService RegistrationService { get; set; }

    public object Post(Invitee invitee)
    {
        // Do other invitation related work that is part of my domain.

        var registration = invitee.TranslateTo<Registration>();
        registration.UserName = invitee.EmailAddress;
        registration.Email = invitee.EmailAddress;

        // It previously threw a null ref exception until I added this.
        RegistrationService.RequestContext = RequestContext;

        var response = RegistrationService.Post(registration);
        if (response is RegistrationResponse)
        {
            var inviteeResponse = response.TranslateTo<InviteeResponse>();
            return inviteeResponse;
        }
        // Else it is probably an error and just return it directly to be handled by SS.
        return response;
    }
}

正如上面代码中的注释所示,在我传递之前,RequestContext它失败并出现NullReferenceException.既然我已经做到了它确实有效,但是我想知道我是否正在进入关于ServiceStack如何工作的上游战斗？它会在赛道上引起更多问题吗？

如果两个服务都在我的控制之下,我只需将注册代码移动到一个单独的共享依赖项中.但是RegistrationService内置于ServiceStack中,除此之外似乎不能以任何其他方式调用.除非我错过了什么？

Answer 1

将请求委托给ServiceStack中的其他服务的方法是调用base.ResolveService<T>哪个只是从IOC解析服务并为您注入当前的RequestContext.这与您正在进行的操作基本类似,但由于这是执行此操作的官方API,因此如果需要执行任何其他操作,则会进行维护.

使用此API,您的服务将如下所示:

public class InviteUserService : Service, IPost<Invitee>
{
    public object Post(Invitee invitee)
    {
        // Do other invitation related work that is part of my domain.

        var registration = invitee.TranslateTo<Registration>();
        registration.UserName = invitee.EmailAddress;
        registration.Email = invitee.EmailAddress;

        // Resolve auto-wired RegistrationService from IOC
        using (var regService = base.ResolveService<RegistrationService>())
        {
            var response = regService.Post(registration);
            if (response is RegistrationResponse)
            {
                var inviteeResponse = response.TranslateTo<InviteeResponse>();
                return inviteeResponse;
            }
            return response;
        }    
    }
}