Get process parameters form afterProcessStarted API of ProcessEventListener

Question

I have a code, where I am inserting some parameters within the process(Jbpm) and then starting the process and also I am adding an EventListener(which extends DefaultProcessEventListener) to the knowledge session

KnowledgeBase kbase = readKnowledgeBase();
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession(); 

Map<String, Object> input = new HashMap<String, Object>();
input.put("payload", payloadObject);
input.put("caseNo", caseNoString);

EventListner listner = new EventListner();
ksession.addEventListener(listner);
ksession.startProcess(strategyName,input);

Now I want the input map within the Listner class

public class EventListner extends DefaultProcessEventListener{

@Override
public void afterProcessStarted(ProcessStartedEvent startEvent) {
    //NEEDED HERE
}

@Override
public void afterProcessCompleted(ProcessCompletedEvent arg0) {
    //NEEDED HERE
}

How...??? Need help

Mike Mike · Accepted Answer · 2015-02-23T15:46:31

I just happened to be working on this same problem. Here is my code that I got working

public void afterNodeLeft(ProcessNodeLeftEvent event) {
    RuleFlowProcessInstance rfpi = (RuleFlowProcessInstance)event.getProcessInstance();
    RuleFlowProcess rfp = rfpi.getRuleFlowProcess();
    VariableScope scope = rfp.getVariableScope();
    for(Variable var : scope.getVariables()) {
        Object obj = rfpi.getVariable(var.getName());
        String value = null;
        if (obj != null) {
            value = obj.toString();
        }
        System.out.printf("\tVariable name: %s, Value: %s%n",var.getName(),value);
    }
}

I found that if you try to access the variables directly through process the result is always null. Accessing process variables through the ProcessInstance appears to work.

Get process parameters form afterProcessStarted API of ProcessEventListener

1 Answers