Question

我想知道是否有可用于AWS .NET SDK的SWF工作流程C＃示例代码？

AWS论坛帖子：https://forums.aws.amazon.com/thread.jspa?threadID=122216&tstart=0

Answer 1

作为熟悉SWF的一部分，我最终编写了一个我希望其他人也可以使用的常见案例库。它被称为SimpleWorkflowFramework.NET，可在https://github.com/sdebnath/SimpleWorkflowFramework.NET作为开源使用。它绝对可以使用很多帮助，所以如果你有兴趣，请直接进入！：）

Answer 2

我开发了一个开源.NET库 - Guflow来编写Amazon SWF。以下是编写视频转码的工作流程的方法：

[WorkflowDescription("1.0")]
public class TranscodeWorkflow : Workflow
{
  public TranscodeWorkflow()
  {
    //DownloadActivity is the startup activity and will be scheduled when workflow is started.
    ScheduleActivity<DownloadActivity>().OnFailure(Reschedule);

    //After DownloadActivity is completed TranscodeActivity activity will be scheduled.
    ScheduleActivity<TranscodeActivity>().AfterActivity<DownloadActivity>()
        .WithInput(a => new {InputFile = ParentResult(a).DownloadedFile, Format = "MP4"})

    ScheduleActivity<UploadToS3Activity>().AfterActivity<TranscodeActivity>()
        .WithInput(a => new {InputFile = ParentResult(a).TranscodedFile});

    ScheduleActivity<SendConfirmationActivity>().AfterActivity<UploadToS3Activity>();
  }
  private static dynamic ParentResult(IActivityItem a) => a.ParentActivity().Result();
}

在上面的示例中，为了清楚起见，我遗漏了任务路由。以下是创建活动的方法：

[ActivityDescription("1.0")]
public class DownloadActivity : Activity
{
  //It supports both sync/async method.
  [ActivityMethod]
  public async Task<Response> Execute(string input)
  {
      //simulate downloading of file
      await Task.Delay(10);
      return new Response() { DownloadedFile = "downloaded path", PollingQueue = PollingQueue.Download};
  }

  public class Response
  {
      public string DownloadedFile;
  }
}

为清楚起见，我省略了其他活动的例子。由documentation，tutorial和samples支持的Guflow。

亚马逊AWS简单工作流服务SWF C＃示例

2 个答案: