Question

我有一个saga，如果从调用返回的状态成功，saga结束，则每隔30秒检查一次API调用的状态，如果没有传奇等待30秒并再次尝试。如果API调用在60分钟内没有返回成功的响应，那么传奇会超时并结束。

我在解除60分钟超时时遇到问题。我的代码是

public class MonitorSubmissionFeedSagaData: IContainSagaData
{
    public Guid Id { get; set; }

    public string Originator { get; set; }

    public string OriginalMessageId { get; set; }

    public bool TimeoutSet { get; set; }

    [Unique]
    public string JobId { get; set; }
}

public class MonitorSubmissionFeedSaga : Saga<MonitorSubmissionFeedSagaData>,
    IAmStartedByMessages<MonitorFeedSubmissonCommand>,
    IHandleMessages<StartCheckSubmissionCommand>,
    IHandleTimeouts<MonitorSubmissionFeedSagaTimeout>
{
    public const int SagaTimeoutInMinutes = 60;

    public IEmpathyBrokerClientApi PostFileService { get; set; }

    protected override void ConfigureHowToFindSaga(SagaPropertyMapper<MonitorSubmissionFeedSagaData> mapper)
    {
        mapper.ConfigureMapping<MonitorFeedSubmissonCommand>(x => x.JobId).ToSaga(saga => saga.JobId);

    }

    public void Handle(MonitorFeedSubmissonCommand message)
    {
        Data.JobId = message.JobId;

        CheckTimeout();

        Bus.Send(new StartCheckSubmissionCommand
        {
            JobId = Data.JobId
        });
    }

    public void Handle(StartCheckSubmissionCommand message)
    {
        Log.Info("Saga with JobId {0} received", Data.JobId);

        bool isCompleted = GetJobStatus(message.JobId);

        while (isCompleted)
        {
            Thread.Sleep(30000);
            isCompleted = GetJobStatus(message.JobId);
        }

        MarkAsComplete();
    }

    public void CheckTimeout()
    {
        RequestTimeout<MonitorSubmissionFeedSagaTimeout>(TimeSpan.FromMinutes(SagaTimeoutInMinutes));
    }

    public void Timeout(MonitorSubmissionFeedSagaTimeout state)
    {
        MarkAsComplete();
    }

    bool GetJobStatus(string jobId)
    {
        return false;
        var status = PostFileService.GetJobIdStatus(jobId);
        if (status.state == "FAILURE" || status.state == "DISCARDED")
        {
            return false;
        }
        return true;
    }

}

谁能看到我哪里出错了？

感谢

Answer 1

你的传奇应该闲着。你通过while循环让它保持活力。超时消息到达某个时刻，然后您应该检查应该发生什么。另一个结账或MarkAsComplete。

我在记事本中写了这个，所以它可能无法编译。但这是为了得到一个想法。

public class MonitorSubmissionFeedSagaData: IContainSagaData
{
public Guid Id { get; set; }
public string Originator { get; set; }
public string OriginalMessageId { get; set; }

[Unique]
public string JobId { get; set; }
public DateTime SagaStartTimeUtc { get; set; }
}

public class MonitorSubmissionFeedSaga : Saga<MonitorSubmissionFeedSagaData>,
    IAmStartedByMessages<MonitorFeedSubmissonCommand>,
    IHandleTimeouts<VerifyApiTimeOut>
{
public IEmpathyBrokerClientApi PostFileService { get; set; }

public void Handle(MonitorFeedSubmissonCommand message)
{
    Data.JobId = message.JobId;
    Data.SagaStartTimeUtc = DateTime.NowUtc;

    CreateTimeoutRequest();
}

public void CreateTimeoutRequest()
{
    RequestTimeout<VerifyApiTimeOut>(TimeSpan.FromSeconds(30));
}

public void Timeout(VerifyApiTimeOut state)
{
    if (!GetJobStatus(Data.JobId) && DateTime.NowUtc < Data.SagaStartTimeUtc.AddMinutes(60))
    {
      CreateTimeoutRequest();
    }

    MarkAsComplete();
}

bool GetJobStatus(string jobId)
{
    return false;
    var status = PostFileService.GetJobIdStatus(jobId);
    if (status.state == "FAILURE" || status.state == "DISCARDED")
    {
        return false;
    }
    return true;
}

}

另一个评论可能是佐贺本身不应该呼唤外部服务。最好不要甚至某些数据库。将此委托给另一项服务。每隔30秒，向另一个处理程序发送一条消息。此处理程序应调用WebService / WebAPI。当它可以确认一切正确时，回复原始的佐贺。当它不正确时，就让它成为现实。传奇将每隔30秒发送一次消息进行重试。

60分钟后，Saga应该停止发送消息和MarkAsComplete。

Nservicebus传奇超时

1 个答案: