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How to retrieve business key from task delegate

Question asked by yangyang.qian on Mar 22, 2011
Latest reply on Mar 25, 2011 by yangyang.qian
Our web app currently starts a process with a business key …

String processName = getProcessName();
String businessKey = getBusinessKey();
ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
RuntimeService runTimeService = processEngine.getRuntimeService();
ProcessInstance processInstance = runTimeService.startProcessInstanceByKey(processName, businessKey);
the process runs and then waits at the first user task to be externally signalled via a TaskListener attached to the User Task … so in my

public class GenericHumanTaskListener implements TaskListener {
     public void notify (DelegateTask delegateTask) { … }
function I am trying to retrieve the business key that the process started with through the delegateTask object … is there a way to do so?

I guess the alternative would be to start the process with a variables HashMap … but I was hoping the business key would be retrievable without having to restore to putting it in the variables map.