Answers to: Can we monitor ivy process programmatically?

Comment by trungdv on Reguel Wermelinger's answer

trungdv — Mon, 26 Dec 2016 07:59:00 -0500

Hi @Reguel Werme... ♦♦ i guess this code just be able to monitor on the process which is in same project with the listener, right?

If i have project B depend on project A, then from B i register listener and try to call subprocess of A, then listener will not work. Do i miss something?

Comment by Reguel Wermelinger on Reguel Wermelinger's answer

Reguel Wermelinger — Mon, 12 Dec 2016 12:56:37 -0500

didn't test it but I think you could implement the clear() method. As far as I remember it is called at least whenever an engine stopps:

LoggingListener{
  ...

  public void historyCleared()
  {
    engine.getHistory().removeElementHistoryListener(this);
  }
}

Comment by trungdv on Reguel Wermelinger's answer

trungdv — Mon, 12 Dec 2016 12:52:29 -0500

Hi ivy team How can we prevent initialization many times? everytime i start process, it init one LoggingListener and i don't know how to avoid this. I've tried with removeElementHistoryListener() but i can't remove exactly listener that i've created before. Thanks

Comment by Reguel Wermelinger on Reguel Wermelinger's answer

Reguel Wermelinger — Wed, 07 Dec 2016 08:42:01 -0500

Yes you can navigate to the concrete process element model like this:

IProcessManager processManager = DiCore.getGlobalInjector().getInstance(IProcessManager.class);
IProcessModelVersion pmv = executionHistory.getElementRequestHistory().getElementHistory().getPmv();
IProjectProcessManager projectProcessManager = processManager.getProjectDataModelFor(pmv);
BaseElement element = projectProcessManager.search().pid(pid).findOneDeep();
logger.info(element.getName()+" /desc="+element.getDescription());

Comment by trungdv on Reguel Wermelinger's answer

trungdv — Wed, 07 Dec 2016 07:52:38 -0500

yes, it worked. so can i get the name/description of PID?

Answer by Reguel Wermelinger

Reguel Wermelinger — Tue, 06 Dec 2016 12:51:03 -0500

Should be an easy task with process engine of 6.0 and upwards. Be aware that the shown example uses non-public API and that it can change without any notice.

The following code show a custom engine execution listener that logs the data and process element PID of every element that is executed:

public class ExecListener {

    public static void install()
    {
        IBpmEngine engine = DiCore.getGlobalInjector().getInstance(IBpmEngine.class);
        engine.getHistory().addElementHistoryListener(new LoggingListener(Ivy.log()));
    }

    private static class LoggingListener implements IElementHistoryListener
    {
        private final Logger logger;

        public LoggingListener(Logger logger) {
            this.logger = logger;
        }

        @Override
        public void elementExecutionHistoryAdded(IElementExecutionHistory executionHistory) {
            PID pid = executionHistory.getElementRequestHistory().getElementHistory().getProcessElementId();
            logger.info("executing element pid: "+pid);

            Object in = executionHistory.getData().getAttributeValue("in");
            if (in instanceof Data)
            {
                Data data = (Data)in;
                logger.info(data);
            }
        }
    }
}

I've created a simple demo project here: https://answers.axonivy.com/upfiles/engineExecutionListener_641.iar