2

我正在尝试收听错误队列以处理失败的消息,但我似乎无法让 MassTransit 不对我希望它在配置中收听的消息设置绑定。配置如下,使用 MassTransit v3:

var hostAddress = new Uri("rabbitmq://localhost/");
var username = "guest";
var password = "guest";

_busControl = MassTransit.Bus.Factory.CreateUsingRabbitMq(configurator =>
{
  var host = configurator.Host(hostAddress, h =>
  {
    h.Username(username);
    h.Password(password);
  });

  configurator.ReceiveEndpoint(host, "myqueue_error",
  endpointConfigurator =>
  {
    endpointConfigurator.Handler<SomeMessage>(context =>
    {
      return Console.Out.WriteLineAsync("Woop");
    });
  });
});

在上面的示例中,它将为发布的任何内容设置绑定,SomeMessage并将它们定向到myqueue_error我只希望消息进入该队列,该队列已从失败的服务转发。有没有办法从队列中消费消息,但告诉 MassTransit 不要为它们绑定?

更新 - 潜在的解决方案

似乎我不需要设置 ReceiveEndpoint 但我可以重命名控制总线以接受我关心的消息,然后这将能够处理这些消息而无需为消息创建交换绑定。

下面是修改后的代码,不确定这是否是一种理想的方式,但它可以工作

var hostAddress = new Uri("rabbitmq://localhost/");
var username = "guest";
var password = "guest";

_busControl = MassTransit.Bus.Factory.CreateUsingRabbitMq(configurator =>
{
  configurator.Host(hostAddress, h =>
  {
    h.Username(username);
    h.Password(password);
  });

  // We need to make the queue look like the error queue
  configurator.BusQueueName = $"{_queue}_error";
  configurator.Durable = true;
  configurator.AutoDelete = false;
  configurator.SetQueueArgument("x-expires", null);
});

var connectHandle = _busControl.ConnectHandler<SomeMessage>(context => Console.Out.WriteLineAsync("Woop"));

_busHandle = _busControl.Start();

_busHandle.Ready.Wait();

// Wait

// Clean up

connectHandle.Disconnect();
_busHandle.Stop
4

1 回答 1

2

通过大量挖掘,我找到了一个更好的解决方案,我完全错过了文档。

似乎我们可以通过订阅消费者收听错误来收听消息这非常适合我一直在努力实现的目标,我们还可以保持错误队列的一致性。 http://docs.masstransit-project.com/en/mt3/usage/exceptions.html#handling-exceptions

所以我解决的最后一点配置如下:

    var hostAddress = new Uri("rabbitmq://localhost/");
    var username = "guest";
    var password = "guest";

    _busControl = MassTransit.Bus.Factory.CreateUsingRabbitMq(configurator =>
    {
      var host = configurator.Host(hostAddress, h =>
      {
        h.Username(username);
        h.Password(password);
      });

      configurator.ReceiveEndpoint(host, "error_listener",
      endpointConfigurator =>
      {
        endpointConfigurator.Handler<Fault<SomeMessage>>(context =>
        {
          return Console.Out.WriteLineAsync("Woop");
        });
      });
    });
于 2015-10-02T14:20:48.573 回答