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@@ -0,0 +1,53 @@
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+package com.sw.service.impl;
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+
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+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
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+import com.sw.domain.TMask;
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+import com.sw.service.SnatchMaskService;
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+import com.sw.service.TMaskService;
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+import com.sw.service.TOrderService;
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+import org.springframework.beans.factory.annotation.Autowired;
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+import org.springframework.data.redis.core.RedisTemplate;
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+import org.springframework.stereotype.Service;
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+import org.springframework.transaction.annotation.Transactional;
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+
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+import javax.annotation.Resource;
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+
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+/**
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+ * @Description TODO
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+ * @Author DingLan
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+ * @Date 2022/2/18 13:22
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+ **/
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+@Service
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+public class SnatchMaskServiceImpl implements SnatchMaskService {
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+ @Autowired
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+ private TMaskService maskService;
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+
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+ @Autowired
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+ private TOrderService orderService;
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+
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+ @Resource
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+ private RedisTemplate redisTemplate;
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+
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+ @Override
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+ @Transactional
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+ public String doSnatch(Integer uid) {
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+ Integer maskId = 1;
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+ //1.get the amount of remaining masks
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+ TMask mask = maskService.getById(maskId);
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+ if(mask.getMaskStock() > 0){
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+ //3.create order
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+ int res = orderService.creatOrder(uid, maskId);
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+ //4.decrease the stock of mask
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+ Boolean flag = maskService.decrease(maskId, mask.getMaskStock() - 5);
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+ if(res > 0 && flag){
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+
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+ //3. add to successUserUids
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+ redisTemplate.opsForSet().add("successUserUids", uid);
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+ return "恭喜你 抢购成功";
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+ }else{
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+ return "抢购失败 稍后重试";
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+ }
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+ }
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+ return "抢购失败 稍后重试";
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+ }
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+}
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