MediatR INotification Handler执行顺序

MediatR  INotification  Handler执行不保证顺序！！！

所以给一个 Notification 注册多个Handler 用法是错误的，

正确的用法是在 Handler 中注册下一个需要调用的 Handler

注册：

源码调试：

    public class NewUserM : INotification
    {
        public string Username { get; set; }
        public string Password { get; set; }
    }


    public class EmailHandler: INotificationHandler<NewUserM>
    {
        private static NLog.Logger log = NLog.LogManager.GetCurrentClassLogger();

        public Task Handle(NewUserM notification, CancellationToken cancellationToken)
        {
            Thread.Sleep(3000);
            log.Info("EmailHandler OK");

            return Task.FromResult(true);
        }
    }

    public class NewUserMHandler : INotificationHandler<NewUserM>
    {
        private static NLog.Logger log = NLog.LogManager.GetCurrentClassLogger();

        public Task Handle(NewUserM notification, CancellationToken cancellationToken)
        {
            log.Info("NewUserMHandler OK");

            return Task.FromResult(true);
        }
    }

//Controller

/// <summary>
/// 模拟多处理器
/// </summary>
/// <param name="user"></param>
/// <returns></returns>
public ActionResult Register2(NewUserM user)
{
_mediator.Publish(user);

return RedirectToAction("Login");
}

//startup

var types = new[] {
typeof(NewUserHandler),

typeof(LogHandler),
typeof(NewUserMHandler),
typeof(EmailHandler),
};
services.AddMediatR(types);

　　

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