trait ICampaign {

  private Logger logger = LoggerFactory.getLogger(getClass());

  void onRegister(User user) {
    logger.info("{} register" , user)
  }

  void onLogin(User user) {
    logger.info("{} login" , user)
  }

  void onLogout(User user) {
    logger.info("{} logout" , user)
  }
}




class Campaign2016 implements ICampaign{

  private Logger logger = LoggerFactory.getLogger(getClass());

  @Override
  void onRegister(User user) {
    logger.info("{} registered" , user)

    Bonus b = new Bonus(user: user , value: 0).save()

    Bonus b2= Bonus.findByUser(user)
    b2.value = b2.value + 10;
  }

// 沒比要實作的，就不用寫（用 trait default 的即可)
//  @Override
//  void onLogin(User user) {
//
//  }
//
//  @Override
//  void onLogout(User user) {
//
//  }
}



@Transactional
class CampaignService {

    private ICampaign ic = new Campaign2016();

    def onRegister(User user) {
        ic.onRegister(user);
    }

    def onLogin(User user) {
        ic.onLogin(user);
    }

    def onLogout(User user) {
        ic.onLogout(user);
    }

}





class TestController {

  def campaignService;

  @Transactional
  def register() {
    User user = new User(
      username : RandomStringUtils.randomAlphabetic(6) ,
      password : RandomStringUtils.randomAlphanumeric(8)
    ).save();

    campaignService.onRegister(user)
    render "register OK"
  }
}