public function onPostAdd(OW_Event $e)
 {
     $params = $e->getParams();
     $activity = new QUESTIONS_BOL_Activity();
     $activity->questionId = (int) $params['questionId'];
     $activity->activityType = QUESTIONS_BOL_FeedService::ACTIVITY_POST;
     $activity->activityId = (int) $params['id'];
     $activity->userId = (int) $params['userId'];
     $activity->timeStamp = time();
     $activity->setData(array('text' => $params['text']));
     $this->service->saveActivity($activity);
 }