package com.ruoyi.goods.service.impl;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.ruoyi.common.core.constant.CacheConstants;
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import com.ruoyi.common.core.enums.ListingStatusEnum;
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import com.ruoyi.common.core.enums.StartStatusEnum;
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import com.ruoyi.common.core.exception.ServiceException;
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import com.ruoyi.common.core.utils.StringUtils;
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import com.ruoyi.common.core.utils.page.BeanUtils;
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import com.ruoyi.common.core.utils.page.PageDTO;
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import com.ruoyi.common.redis.service.RedisService;
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import com.ruoyi.goods.controller.management.dto.GoodsSeckillDTO;
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import com.ruoyi.goods.controller.management.dto.GoodsSeckillQuery;
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import com.ruoyi.goods.controller.management.dto.GoodsSeckillUpd;
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import com.ruoyi.goods.controller.management.vo.GoodsSeckillVO;
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import com.ruoyi.goods.mapper.GoodsSeckillMapper;
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import com.ruoyi.goods.service.IGoodsSeckillService;
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import com.ruoyi.goods.service.IGoodsSkuService;
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import com.ruoyi.goods.service.async.AsyncMethodService;
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import com.ruoyi.system.api.constants.DelayTaskEnum;
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import com.ruoyi.system.api.constants.NotificationTypeConstant;
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import com.ruoyi.system.api.domain.GoodsSeckill;
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import com.ruoyi.system.api.domain.GoodsSku;
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import com.ruoyi.system.api.domain.dto.ListStatusDTO;
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import com.ruoyi.system.api.feignClient.OrderClient;
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import com.ruoyi.system.api.feignClient.SysUserClient;
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import java.time.LocalDateTime;
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import java.util.List;
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import java.util.Map;
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import java.util.Optional;
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import java.util.concurrent.ConcurrentHashMap;
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import lombok.RequiredArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import util.WebSocketUsers;
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/**
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* <p>
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* 商品秒杀表 服务实现类
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* </p>
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*
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* @author mitao
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* @since 2024-05-16
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*/
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@Slf4j
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@Service
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@RequiredArgsConstructor
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public class GoodsSeckillServiceImpl extends ServiceImpl<GoodsSeckillMapper, GoodsSeckill> implements IGoodsSeckillService {
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private final IGoodsSkuService goodsSkuService;
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private final OrderClient orderClient;
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private final RedisService redisService;
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private final SysUserClient sysUserClient;
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private final AsyncMethodService asyncMethodService;
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// 创建一个静态共享的ObjectMapper实例以重用
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private static final ObjectMapper objectMapper = new ObjectMapper();
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@Override
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@Transactional(rollbackFor = Exception.class)
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public void addGoodsSeckill(GoodsSeckillDTO dto) {
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List<GoodsSeckill> goodsSeckills = BeanUtils.copyList(dto.getGoodsSkuList(),
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GoodsSeckill.class);
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for (GoodsSeckill goodsSeckill : goodsSeckills) {
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goodsSeckill.setShareTitle(dto.getShareTitle());
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goodsSeckill.setSharePic(dto.getSharePic());
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goodsSeckill.setStartTime(dto.getStartTime());
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goodsSeckill.setEndTime(dto.getEndTime());
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goodsSeckill.setStartStatus(StartStatusEnum.NOT_STARTED);
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}
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this.saveBatch(goodsSeckills);
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for (GoodsSeckill goodsSeckill : goodsSeckills) {
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GoodsSku goodsSku = goodsSkuService.getById(goodsSeckill.getGoodsSkuId());
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if (StringUtils.isNull(goodsSku)) {
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throw new ServiceException("商品不存在");
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}
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Integer seckillStock = goodsSeckill.getSeckillStock();
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goodsSkuService.lambdaUpdate()
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.set(GoodsSku::getStock, goodsSku.getStock() - seckillStock)
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.ge(GoodsSku::getStock, seckillStock)
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.eq(GoodsSku::getId, goodsSku.getId());
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asyncMethodService.seckillScheduleTask(goodsSeckill);
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}
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}
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/**
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* 获取秒杀商品列表的分页数据
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*
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* @param query 秒杀商品查询对象
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* @return PageDTO<GoodsSeckillVO>
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*/
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@Override
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public PageDTO<GoodsSeckillVO> getGoodsSeckillPage(GoodsSeckillQuery query) {
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return PageDTO.of(baseMapper.getGoodsSeckillPage(query.getGoodsSkuName(),
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new Page<>(query.getPageCurr(), query.getPageSize())
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));
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}
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/**
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* 修改秒杀商品
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*
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* @param upd 商品秒杀数据传输对象
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*/
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@Override
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@Transactional(rollbackFor = Exception.class)
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public void updGoodsSeckill(GoodsSeckillUpd upd) {
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//查询秒杀商品
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GoodsSeckill goodsSeckill = this.getById(upd.getId());
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if (StringUtils.isNull(goodsSeckill)) {
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throw new ServiceException("秒杀商品不存在");
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}
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if (goodsSeckill.getStartStatus().equals(StartStatusEnum.STARTED)) {
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throw new ServiceException("秒杀商品已开始秒杀，不能修改");
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}
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GoodsSeckill goodsSeckillUpd = BeanUtils.copyBean(upd, GoodsSeckill.class);
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this.updateById(goodsSeckillUpd);
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asyncMethodService.seckillScheduleTask(goodsSeckill);
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}
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/**
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* 上架/下架 秒杀商品
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*
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* @param dto 商品上下架状态对象
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*/
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@Override
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public void updStatus(ListStatusDTO dto) {
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GoodsSeckill goodsSeckill = this.getById(dto.getId());
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if (StringUtils.isNull(goodsSeckill)) {
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throw new ServiceException("秒杀商品不存在");
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}
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this.lambdaUpdate()
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.eq(GoodsSeckill::getId, dto.getId())
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.set(GoodsSeckill::getListingStatus, dto.getListingStatus())
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.update();
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if (dto.getListingStatus().equals(ListingStatusEnum.REMOVED_FROM_THE_SHELF)) {
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//移除该秒杀商品的延时任务
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redisService.deleteObject(
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DelayTaskEnum.SECKILL_START_TASK.getCode() + "-" + goodsSeckill.getId());
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redisService.deleteObject(
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DelayTaskEnum.SECKILL_END_TASK.getCode() + "-" + goodsSeckill.getId());
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}
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}
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/**
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* 查看详情
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*
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* @param id 秒杀商品id
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* @return GoodsSeckillVO 商品秒杀视图对象
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*/
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@Override
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public GoodsSeckillVO getDetail(Long id) {
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GoodsSeckill goodsSeckill = this.getById(id);
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if (StringUtils.isNull(goodsSeckill)) {
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throw new ServiceException("秒杀商品不存在");
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}
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GoodsSeckillVO vo = BeanUtils.copyBean(goodsSeckill, GoodsSeckillVO.class);
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GoodsSku goods = goodsSkuService.getById(goodsSeckill.getGoodsSkuId());
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Optional.of(goods).ifPresent(goodsSku -> vo.setGoodsSkuName(goodsSku.getSkuName()));
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Integer num = orderClient.getSeckillMembers(goodsSeckill.getGoodsSkuId()).getData();
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vo.setNumberOfPurchasedMembers(num);
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return vo;
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}
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/**
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* 开始秒杀
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*
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* @param seckillId 秒杀id
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*/
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@Override
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public void startSeckill(Long seckillId) throws JsonProcessingException {
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log.info(">>>>>>>>>>>>>>>>>>>>{}秒杀开始<<<<<<<<<<<<<<<<<<<<", seckillId);
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GoodsSeckill goodsSeckill = this.getById(seckillId);
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//秒杀商品不能为空且状态为未开始
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if (StringUtils.isNotNull(goodsSeckill)
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&& goodsSeckill.getStartStatus().equals(StartStatusEnum.NOT_STARTED)) {
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//开始秒杀
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this.lambdaUpdate().set(GoodsSeckill::getStartStatus, StartStatusEnum.STARTED)
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.eq(GoodsSeckill::getId, seckillId).update();
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// 将秒杀商品放入缓存
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redisService.setCacheObject(
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CacheConstants.SECKILL_GOODS + goodsSeckill.getId(),
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goodsSeckill.getSeckillStock());
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}
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//推送秒杀开始消息
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Map<String, Object> map = new ConcurrentHashMap<>();
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map.put("notification_type", NotificationTypeConstant.SECKILL);
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map.put("notification_time", LocalDateTime.now());
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map.put("message_type", "start");
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String msg = objectMapper.writeValueAsString(map);
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WebSocketUsers.sendMessageToUsersByText(msg);
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log.info("===================>发送websocket通知，消息体{}", msg);
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}
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/**
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* 结束秒杀
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*
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* @param seckillId 秒杀id
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*/
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@Override
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public void endSeckill(Long seckillId) throws JsonProcessingException {
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log.info(">>>>>>>>>>>>>>>>>>>>{}秒杀结束<<<<<<<<<<<<<<<<<<<<", seckillId);
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GoodsSeckill goodsSeckill = this.getById(seckillId);
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if (StringUtils.isNotNull(goodsSeckill)
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&& goodsSeckill.getStartStatus().equals(StartStatusEnum.STARTED)) {
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//结束秒杀
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this.lambdaUpdate().set(GoodsSeckill::getStartStatus, StartStatusEnum.ENDED)
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.eq(GoodsSeckill::getId, seckillId).update();
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// 将秒杀商品从缓存中移除
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redisService.deleteObject(CacheConstants.SECKILL_GOODS + goodsSeckill.getId());
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}
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Map<String, Object> map = new ConcurrentHashMap<>();
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map.put("notification_type", NotificationTypeConstant.SECKILL);
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map.put("notification_time", LocalDateTime.now());
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map.put("message_type", "end");
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String msg = objectMapper.writeValueAsString(map);
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WebSocketUsers.sendMessageToUsersByText(msg);
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log.info("===================>发送websocket通知，消息体{}", msg);
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}
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}
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