How to know child workflow status(Workflow Events)

Community Support
1

Hello,

When using await startChild, how can I subscribe to or monitor the events of the child workflow?

Additionally, how can I achieve the same for the root workflow from an external module for listening or subscribing?

2

The child workflow can send signals to the parent or any of its ancestors. What is the use case for "events monitoring’? If it is just for external visibility I would recommend querying the child directly.

3

For signals,
If I understand correctly, I’m gonna use setHandler for parent and for child I will define await childHandle.signal('anySignal');

My other purpose is, how can I reactively get workflow events.

Listen if new workflow started, closed etc.
Listen for that workflow events

I use setInterval for now

listResponse = await connection.workflowService.listWorkflowExecutions({
      namespace: 'default',
      query: `WorkflowId = "${workflowId}" and ExecutionStatus = "Running"`,
 });
4

The child would define parentHandle.signal(...).

What is the purpose of getting child workflow events by the parent.

I don’t think you want to use listWorklfowExecution as part of your workflow logic. It is eventually consistent and cannot scale out the way workflows do.

5

Ofcource, What should I use instead?

6

It is hard to give recommendations without understanding your specific use case and its requirements.