Rebus 4.0 - 如何指定处理程序的顺序，尝试使用 "SpecifyOrderOfHandlers" 方法但给出编译时错误

Question

你好 Rebus 粉丝，我们多年来一直在使用 Rebus 0.84 aka 1.0，现在 转向 4.0 版本 & 它似乎在实现和性能方面有了很大改进，但是执行处理程序命令时遇到一些问题。

之前版本的例子，我们曾经做过

public class RebusInstaller : IWindsorInstaller
{
    public void Install(IWindsorContainer container, IConfigurationStore store)
    {
        Configure.With(new WindsorContainerAdapter(container))
      .Logging(l => l.Log4Net())
      .Transport(t => t.UseMsmqAndGetInputQueueNameFromAppConfig())
      .SpecifyOrderOfHandlers(t => t.First<AuthenticationHandler>())
      .Serialization(x => x.UseJsonSerializer())
      .MessageOwnership(m => m.FromRebusConfigurationSection())
      .Sagas(m => m.StoreInNDb())
      .Subscriptions(m => m.StoreInNDb())
      .Timeouts(m => m.StoreInMemory())
      .Events(e =>
      {
          e.MessageSent += (advancedbus, destination, message) =>
          {
              var timeToBeReceived = ConfigurationManager.AppSettings["TimeToBeReceived"];
              if (string.IsNullOrEmpty(timeToBeReceived))
                  timeToBeReceived = "00:00:30";
              if (timeToBeReceived != "-1")
              {
                  advancedbus.AttachHeader(message, Headers.TimeToBeReceived, timeToBeReceived);
                  advancedbus.AttachHeader(message, Headers.Express, "rebus-express");
              }
          };
      })
      .CreateBus()
      .Start();
    }
}

现在，如果我用 rebus 4.0 实现相同的功能，那么不知何故，在尝试 "SpecifyOrderOfHandlers" 时它会给出编译时错误，它不接受任何参数，那么我们如何实现处理程序的排序，下面是使用 rebus 4.0

实现

using Rebus.Config;
using Rebus.Persistence.InMem;
using Rebus.Handlers;
using Rebus.Messages;

public void Install(IWindsorContainer container, IConfigurationStore store)
    {
        Configure.With(new CastleWindsorContainerAdapter(container))
          .Options(o =>
          {
              o.SpecifyOrderOfHandlers(o => o.First<AuthenticationHandler>());
          })
          .Logging(l => l.Log4Net())
          .Transport(t => t.UseMsmq(ConfigurationManager.AppSettings["InputQueue"]))
          .Routing(r => r.TypeBasedRoutingFromAppConfig())
          .Sagas(m => m.StoreInNDb())
          .Subscriptions(m => m.StoreInNDb())
          .Timeouts(m => m.StoreInMemory())
          .Events(e =>
          {
              e.BeforeMessageSent += (bus, headers, message, context) =>
              {
                  var timeToBeReceived = ConfigurationManager.AppSettings["TimeToBeReceived"];
                  if (string.IsNullOrEmpty(timeToBeReceived))
                      timeToBeReceived = "00:00:30";
                  if (timeToBeReceived != "-1")
                  {
                      headers.Add(Headers.TimeToBeReceived, timeToBeReceived);
                      headers.Add(Headers.Express, "rebus-express");
                  }
              };
          })
          .Start();
    }

请建议如何使用 rebus 4.0 实现处理程序排序，并让我知道上述实现 rebus 4.0 的方法是否正确或需要改进。

Answer 1

您只是让 SpecifyOrderOfHandlers 的调用有点太复杂了 – 这应该可以解决问题：

Configure.With(activator)
    (...)
    .Options(o =>
    {
        o.SpecifyOrderOfHandlers()
            .First<AuthenticationHandler>();
    })
    .(...)
    .Start();

如果不是很明显，那可能是因为 SpecifyOrderOfHandlers 在另一个命名空间中，所以如果您添加

using Rebus.Handlers.Reordering;

在文件顶部的某个地方，我敢打赌 IntelliSense 会引导你 :)

Rebus 4.0 - 如何指定处理程序的顺序，尝试使用 "SpecifyOrderOfHandlers" 方法但给出编译时错误

Rebus 4.0 - How to specify order of handlers , tried with "SpecifyOrderOfHandlers" method but gives compile time error

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