Creating a loop in CDK Step Functions: A step-by-step guide

I am currently in the process of migrating a Step function that was initially created using the AWS interface. However, I have run into an issue while trying to replicate a specific behavior:

Depending on a certain condition, I need task 2 to either execute task 3 and return to task 1 or terminate the step function altogether. The problem lies with the red path shown in the image https://i.sstatic.net/A1vJv.png Here is the snippet of code I am working with at the moment:

sfn.Chain.start(OtherTaskWeDoNotCare)
  .next(task1)
  .next(
    new sfn.Choice(this, "task2").when(
      sfn.Condition.booleanEquals("$.isFinished", false),
      task3.next(task1) // This part is causing issues
    )
  );

I would appreciate any assistance from someone who may be able to help me resolve this issue! Thank you in advance! 🙂

typescriptamazon-web-servicesaws-cdkaws-step-functions

Answer â„–1

After some trial and error, I have finally cracked the code! 😅 Check out the solution below:

sfn.Chain.start(AnotherTaskNotRelevant)
  .next(task1)
  .next(
    new sfn.Choice(this, "task2")
    .when(
      sfn.Condition.booleanEquals("$.isFinished", false),
      task3.next(task1)
    )
    .otherwise(new sfn.Succeed(this, "Done"))
  );

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