Child workflow method calling issue

Community Support
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1

Hi All,

My scenario is
I received a request and i create multiple child workflows from that request.
Now, I want to call @UpdateMethod on specific child workflow.
What is the best way to do this?

2

Direct workflow to workflow update has not yet been implemented. Use activities to call updates. If the update is long-running, use a signal to make a request and let the child send a reply signal when the request is processed.

3

Updates are not long running in this case also, can I get any example of calling updates through activities.

4

Hi @Vidit_Sharma

you have to use the WorkflwoClient,

Inject the workflow client into your activity when the worker registers it

worker.registerActivitiesImplementations(new GreetingActivitiesImpl(client));

and from your activity you can create the workflowStub and call update

    public String composeGreeting(String greeting, String name) {
      client.newUntypedWorkflowStub("").update(...)
...

Antonio

5

I would recommend using typed stub where possible:

client.newWorkflowStub(ChildWorkflow.class, "id").whateverUpdateMethod(...)