How can i get a signal from a ChildWorkflow in the ParentWorkflow(Java)

I have a variable A in the ChildWorkflow . Now I want to pass it to the parent ParentWorkflow. How do I do it?

Hello @lyq

You can signal the parent workflow

    Optional<String> parentWorkflowId = Workflow.getInfo().getParentWorkflowId();
    if (parentWorkflowId.isPresent()) {
      String parentId = parentWorkflowId.get();
      Child parent =
          Workflow.newExternalWorkflowStub(Parent.class, parentId);

or return the value in the child workflow and wait in the parent for the child workflow to complete

Let me know if it helps