DMN / Camunda Modeller: how to define a Parallel Multi Instance Result

Question

I want to include a decision table in my process.

As the input is a list of elements, I want to call it for each element in parallel.

When I look at the output it only includes one entry. So it seems that each execution overrides the previous one. Example: [{pricePerProcessInstance=150.0, pricePerTask=0.0}]

I suspect I do something wrong in the definition.

Here is the definition for it:

Answer 1

I believe that the Execution Listener (1) should solve your problem.

You could configure an end execution listener as depicted here

Please take a look at the example implementation of class defined in the listener section above.

public class MyService implements JavaDelegate {

  @Override
  public void execute(DelegateExecution delegateExecution) {
    List<String> resultList = (List<String>) delegateExecution.getVariable("resultList");

    if (resultList == null) {
      resultList = new ArrayList<>();
    }

    resultList.add((String) delegateExecution.getVariable("processPrices"));

    delegateExecution.setVariable("resultList", resultList);

  }

}

In every execution of the decision table the result variable processPrices will be added to the ArrayList resultList.

(1) https://docs.camunda.org/manual/latest/user-guide/process-engine/delegation-code/#execution-listener