1.创建一个抽象类，方便责任规则传递。
抽象类中，抽象类作为自己的属性。并创建一个抽象方法；
eg：
public abstract class RuleHandler {
public RuleHandler successor;
public RuleHandler getSuccessor() {
return successor;
}
public void setSuccessor(RuleHandler successor) {
this.successor = successor;
}
public abstract ApiResponse handlerRequest(RuleDto rule);
}
2.实现抽象类方法。写自定义类自己的逻辑。
eg：
3.多个责任类实现抽象类方法，书写各自逻辑代码
4.责任链核心代码引用。
eg:
@Service
public class KruleService {
private static final Logger LOG = LoggerFactory.getLogger(KruleService.class);
@Autowired
private RuleMapper ruleMapper;
@Autowired
private CheckTotalPrize checkTotalPrize;
@Autowired
private CheckFristHitPrize checkFristHitPrize;
@Autowired
private CheckMaxHitTime checkMaxHitTime;
@Autowired
private CheckHitRule checkHitRule;
@Autowired
private WinnerInfoMapper winnerInfoMapper;
/**
* 抽奖规则校验
* @param userId
* @return
*/
public ApiResponse checkRule(Integer userId,Integer userFriendsId){
ApiResponse<Object> response = new ApiResponse<>();
// 获取有效的一个奖品规则
RuleDto rule = this.ruleMapper.getVaildRuleOne();
if(!Optional.ofNullable(rule).isPresent()){
response.setMsg(ErrorResultEnum.NO_PRIZE_RULE.getMsg());
response.setCode(ErrorResultEnum.NO_PRIZE_RULE.getCode());
return response;
}
rule.setUserFriendsId(userFriendsId);
rule.setUserId(userId);
// 查询中奖纪录
WinnerInfo winnerInfo = this.winnerInfoMapper.findWinnerInfoByFrindsId(userFriendsId);
LOG.info("查询中奖纪录:{}",winnerInfo);
if(Optional.ofNullable(winnerInfo).isPresent()){
String couponsCode = winnerInfo.getCouponsCode();
if(StringUtils.isEmpty(couponsCode)){
response.setMsg(ErrorResultEnum.NO_HIT_PRIZE.getMsg());
response.setCode(ErrorResultEnum.NO_HIT_PRIZE.getCode());
}else{
response.setMsg(ErrorResultEnum.HIT_PRIZE.getMsg().replace("XXXX",couponsCode));
response.setCode(ErrorResultEnum.HIT_PRIZE.getCode());
}
return response;
}
// 1.总奖品校验
checkTotalPrize.setSuccessor(checkFristHitPrize);
// 2.首次必中校验
checkFristHitPrize.setSuccessor(checkMaxHitTime);
// 3.每人最多中奖校验
checkMaxHitTime.setSuccessor(checkHitRule);
return checkTotalPrize.handlerRequest(rule);
}
}
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