Basic question on signal using java code for existing workflowId

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1

I am starting a workflow and have a workflowId constant for a Id, and i have put one of the activity on hold time and how do we send signal on workflowid from different App based on event , so we can stop the activity which is in Hold, i am looking java example

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2

Temporal doesn’t have a concept of “on-hold activity”. What do you mean by this?

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3

if a work flow with work flow Id going on with two activities

  1. with thread.sleep(1msec) → activity 1
  2. with thread.sleep(20000msec) → activity 2 → can we send a signal to that work flow to stop or mark it success? or do something on that activity 2 ,
  3. signal mean in temporal space signal to existing work flow id only righ
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4 
@WorkflowInterface
public interface HelloWorkflowWorkflow extends Retryable {

    @WorkflowMethod
    String enrichCalls(String name);
    @SignalMethod (name = "ExecutionWorkflow-v1")
    void resolveHold();
}

Activity impl

public class CreateOrderImpl implements CreateOrder {

    @Override
    public String createOrder(String name) {
        return "OrderCreated";
    }

    @Override
    public String holdOrderWithRemorse(String name) {
        try {
            Thread.sleep(60000);

        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "Released";
    }
}

worker imple

       @Override
    public String enrichCalls(String name){
        System.out.println("HelloWorkflowWorkflowImpl.greetSomeone");
        System.out.println();
        String merch =activities.createOrder(name);
     //   System.out.println("Id dddd"+ merch);
        String storeview =activities.holdOrderWithRemorse(name);
       // System.out.println("storeview ddd"+ storeview);
            return storeview;
    }

    @Override
    public void resolveHold() {
    System.out.println("resolvehold");
    }

and

two app codes that trigger worker

			HelloWorkflowWorkflow workflow = client.newWorkflowStub(HelloWorkflowWorkflow.class, options);

second app code
to send signal

			WorkflowStub workflow = client.newUntypedWorkflowStub("HelloWorkflowWorkflow");
				workflow.signal("ExecutionWorkflow-v1", null);


				String greeting = workflow.enrichCalls("World2");
5

I don’t understand why you would sleep in an activity instead of using Workflow.await or Workflow.sleep.

See samples-java/core/src/main/java/io/temporal/samples/countinterceptor/workflow/MyWorkflowImpl.java at 3e55d09936969674bc89e3b3b454caa4dd6fbd59 · temporalio/samples-java · GitHub