.setCurrentWorkflowSession(workflowSession);
// 计算超时
Duration duration = task.getDuration();
if (duration != null && calService != null) {
((TaskInstance) taskInstance).setExpiredTime(calService
.dateAfter(calService.getSysDate(), duration));
}
// 2、保存实例taskInstance
persistenceService.saveOrUpdateTaskInstance(taskInstance);