AwardPool awardPool = awardPoolDao.getAwardPool(poolId);//sql查询，将数据映射到AwardPool对象for (Award award : awardPool.getAwards()) { //寻找到符合award.getProbability()概率的award}
import com.company.team.bussiness.lottery.*;//抽奖上下文import com.company.team.bussiness.riskcontrol.*;//风控上下文import com.company.team.bussiness.counter.*;//计数上下文import com.company.team.bussiness.condition.*;//活动准入上下文import com.company.team.bussiness.stock.*;//库存上下文
import com.company.team.bussiness.lottery.domain.valobj.*;//领域对象-值对象import com.company.team.bussiness.lottery.domain.entity.*;//领域对象-实体import com.company.team.bussiness.lottery.domain.aggregate.*;//领域对象-聚合根import com.company.team.bussiness.lottery.service.*;//领域服务import com.company.team.bussiness.lottery.repo.*;//领域资源库import com.company.team.bussiness.lottery.facade.*;//领域防腐层
package com.company.team.bussiness.lottery.domain.aggregate;import ...;public class DrawLottery { private int lotteryId; //抽奖id private List<AwardPool> awardPools; //奖池列表 //getter & setter public void setLotteryId(int lotteryId) { if(id<=0){ throw new IllegalArgumentException("非法的抽奖id"); } this.lotteryId = lotteryId; } //根据抽奖入参context选择奖池 public AwardPool chooseAwardPool(DrawLotteryContext context) { if(context.getMtCityInfo()!=null) { return chooseAwardPoolByCityInfo(awardPools, context.getMtCityInfo()); } else { return chooseAwardPoolByScore(awardPools, context.getGameScore()); } } //根据抽奖所在城市选择奖池 private AwardPool chooseAwardPoolByCityInfo(List<AwardPool> awardPools, MtCifyInfo cityInfo) { for(AwardPool awardPool: awardPools) { if(awardPool.matchedCity(cityInfo.getCityId())) { return awardPool; } } return null; } //根据抽奖活动得分选择奖池 private AwardPool chooseAwardPoolByScore(List<AwardPool> awardPools, int gameScore) {...} }
package com.company.team.bussiness.lottery.domain.valobj; import ...; public class AwardPool { private String cityIds;//奖池支持的城市 private String scores;//奖池支持的得分 private int userGroupType;//奖池匹配的用户类型 private List<Awrad> awards;//奖池中包含的奖品 //当前奖池是否与城市匹配 public boolean matchedCity(int cityId) {...} //当前奖池是否与用户得分匹配 public boolean matchedScore(int score) {...} //根据概率选择奖池 public Award randomGetAward() { int sumOfProbablity = 0; for(Award award: awards) { sumOfProbability += award.getAwardProbablity(); } int randomNumber = ThreadLocalRandom.current().nextInt(sumOfProbablity); range = 0; for(Award award: awards) { range += award.getProbablity(); if(randomNumber<range) { return award; } } return null; } }
//数据库资源import com.company.team.bussiness.lottery.repo.dao.AwardPoolDao;//数据库访问对象-奖池import com.company.team.bussiness.lottery.repo.dao.AwardDao;//数据库访问对象-奖品import com.company.team.bussiness.lottery.repo.dao.po.AwardPO;//数据库持久化对象-奖品import com.company.team.bussiness.lottery.repo.dao.po.AwardPoolPO;//数据库持久化对象-奖池import com.company.team.bussiness.lottery.repo.cache.DrawLotteryCacheAccessObj;//分布式缓存访问对象-抽奖缓存访问import com.company.team.bussiness.lottery.repo.repository.DrawLotteryRepository;//资源库访问对象-抽奖资源库
package com.company.team.bussiness.lottery.repo;import ...;@Repositorypublic class DrawLotteryRepository { @Autowired private AwardDao awardDao; @Autowired private AwardPoolDao awardPoolDao; @AutoWired private DrawLotteryCacheAccessObj drawLotteryCacheAccessObj; public DrawLottery getDrawLotteryById(int lotteryId) { DrawLottery drawLottery = drawLotteryCacheAccessObj.get(lotteryId); if(drawLottery!=null){ return drawLottery; } drawLottery = getDrawLotteyFromDB(lotteryId); drawLotteryCacheAccessObj.add(lotteryId, drawLottery); return drawLottery; } private DrawLottery getDrawLotteryFromDB(int lotteryId) {...} }
package com.company.team.bussiness.lottery.facade;import ...;@Componentpublic class UserCityInfoFacade { @Autowired private LbsService lbsService;//外部用户城市信息RPC服务 public MtCityInfo getMtCityInfo(LotteryContext context) { LbsReq lbsReq = new LbsReq(); lbsReq.setLat(context.getLat()); lbsReq.setLng(context.getLng()); LbsResponse resp = lbsService.getLbsCityInfo(lbsReq); return buildMtCifyInfo(resp); } private MtCityInfo buildMtCityInfo(LbsResponse resp) {...} }
package com.company.team.bussiness.lottery.service.implimport ...;@Servicepublic class LotteryServiceImpl implements LotteryService { @Autowired private DrawLotteryRepository drawLotteryRepo; @Autowired private UserCityInfoFacade UserCityInfoFacade; @Autowired private AwardSendService awardSendService; @Autowired private AwardCounterFacade awardCounterFacade; @Override public IssueResponse issueLottery(LotteryContext lotteryContext) { DrawLottery drawLottery = drawLotteryRepo.getDrawLotteryById(lotteryContext.getLotteryId());//获取抽奖配置聚合根 awardCounterFacade.incrTryCount(lotteryContext);//增加抽奖计数信息 AwardPool awardPool = lotteryConfig.chooseAwardPool(bulidDrawLotteryContext(drawLottery, lotteryContext));//选中奖池 Award award = awardPool.randomChooseAward();//选中奖品 return buildIssueResponse(awardSendService.sendAward(award, lotteryContext));//发出奖品实体 } private IssueResponse buildIssueResponse(AwardSendResponse awardSendResponse) {...} }
package ...;import ...;@Servicepublic class LotteryApplicationService { @Autowired private LotteryRiskService riskService; @Autowired private LotteryConditionService conditionService; @Autowired private LotteryService lotteryService; //用户参与抽奖活动 public Response<PrizeInfo, ErrorData> participateLottery(LotteryContext lotteryContext) { //校验用户登录信息 validateLoginInfo(lotteryContext); //校验风控 RiskAccessToken riskToken = riskService.accquire(buildRiskReq(lotteryContext)); ... //活动准入检查 LotteryConditionResult conditionResult = conditionService.checkLotteryCondition(otteryContext.getLotteryId(),lotteryContext.getUserId()); ... //抽奖并返回结果 IssueResponse issueResponse = lotteryService.issurLottery(lotteryContext); if(issueResponse!=null && issueResponse.getCode()==IssueResponse.OK) { return buildSuccessResponse(issueResponse.getPrizeInfo()); } else { return buildErrorResponse(ResponseCode.ISSUE_LOTTERY_FAIL, ResponseMsg.ISSUE_LOTTERY_FAIL) } } private void validateLoginInfo(LotteryContext lotteryContext){...} private Response<PrizeInfo, ErrorData> buildErrorResponse (int code, String msg){...} private Response<PrizeInfo, ErrorData> buildSuccessResponse (PrizeInfo prizeInfo){...} }
