How to track RequestCancelExternalWorkflow cancel complition within workflow?

Community Support
1

I would like to use workflow.RequestCancelExternalWorkflow to cancel long running workflow as part of my deletion business logic. I understand from documentation and sampling locally that this is an async operation and it returns
Future, meaning I have no way to know if the given workflow was actually cancelled yet, just scheduled to be cancelled.

Question: What would be an appropriate way to poll for completed cancellation of a given external workflow within yet another workflow? GetWorkflowHistory ?

If so why does client sdk says:

// Package client is used by external programs to communicate with Temporal service.
// NOTE: DO NOT USE THIS API INSIDE OF ANY WORKFLOW CODE!!!

And what would be an alternative?

2

Hello,
we are looking into adding support for waiting for an external workflow within a workflow. It is tracked in this issue.

For waiting for workflow completion, you should be able to use
WorkflowRun instance which you can get from GetWorkflow.

The alternative would be I think to do the poll and wait inside a Child Workflow or Activity.