suspend workflow when artifact not exist

[zychina]

user case:

1. step1 submit a job to 3rd party system via http
2. 3rd party system process data and generate result file. It will take hours.
3. step1 run loop to pull result file until 3rd party system generate the result file.
4. step1 done
5. follow steps running to process result file.

The problem is step1 pod will running for hours, but actual work is done by 3rd party system, most of work in step1 is waiting. It means resource waste.

I know argo event can help on this problem, but it means a lot of work, 3rd system report event, existing workflows re-write.

Is there any simple way to resolve the problem ? Thank you.

A idea is my mind is extending suspend template, in suspend, checking artifact existing or not.

• name: check-artifact
  suspend:
  duration: "2h"
  dependencies:
  artifacts:
  - name: message
  from: "{{steps.generate-artifact.outputs.artifacts.hello-art}}"