addTimerListener();
timerInstances = new ArrayList<Long>(timers.size());
TimerManager timerManager = ((ProcessInstance) getProcessInstance()).getWorkingMemory().getTimerManager();
for (Timer timer: timers.keySet()) {
TimerInstance timerInstance = createTimerInstance(timer);
timerManager.registerTimer(timerInstance, (ProcessInstance) getProcessInstance());
timerInstances.add(timerInstance.getId());
}
}
}