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git整合redisson

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jieyuu 2024-08-06 01:02:13 +08:00
parent 55024f78c0
commit aec4b87b2a
1 changed files with 37 additions and 43 deletions
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xdclass-coupon-service/src/main/java/net/jieyuu/service/impl/CouponServiceImpl.java
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@ -20,6 +20,8 @@ import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import net.jieyuu.utils.CommonUtil; import net.jieyuu.utils.CommonUtil;
import net.jieyuu.utils.JsonData; import net.jieyuu.utils.JsonData;
import net.jieyuu.vo.CouponVO; import net.jieyuu.vo.CouponVO;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.BeanUtils; import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate; import org.springframework.data.redis.core.StringRedisTemplate;
@ -55,6 +57,9 @@ public class CouponServiceImpl implements CouponService {
@Autowired @Autowired
private StringRedisTemplate redisTemplate; private StringRedisTemplate redisTemplate;
@Autowired
private RedissonClient redissonClient;
@Override @Override
public Map<String, Object> pageCouponActivity(int page, int size) { public Map<String, Object> pageCouponActivity(int page, int size) {
Page<CouponDO> pageInfo = new Page<>(page, size); Page<CouponDO> pageInfo = new Page<>(page, size);
@ -88,13 +93,12 @@ public class CouponServiceImpl implements CouponService {
public JsonData addCoupon(long couponId, CouponCategoryEnum category) { public JsonData addCoupon(long couponId, CouponCategoryEnum category) {
LoginUser loginUser = LoginInterceptor.threadLocal.get(); LoginUser loginUser = LoginInterceptor.threadLocal.get();
String uuid = CommonUtil.generateUUID();
String lockKey = "lock:coupon:" + couponId; String lockKey = "lock:coupon:" + couponId;
//避免锁被误删 RLock rlock = redissonClient.getLock(lockKey);
Boolean lockFlag = redisTemplate.opsForValue().setIfAbsent(lockKey, uuid, Duration.ofMinutes(10)); // 多个线程进入 会等待锁
rlock.lock();
log.info("领券接口加锁成功:{}", Thread.currentThread().getId());
if (lockFlag) {
log.info("加锁成功:{}", couponId);
try { try {
// 执行业务逻辑 // 执行业务逻辑
CouponDO couponDO = couponMapper.selectOne(new QueryWrapper<CouponDO>() CouponDO couponDO = couponMapper.selectOne(new QueryWrapper<CouponDO>()
@ -113,7 +117,7 @@ public class CouponServiceImpl implements CouponService {
couponRecordDO.setUserId(loginUser.getId()); couponRecordDO.setUserId(loginUser.getId());
couponRecordDO.setId(null); couponRecordDO.setId(null);
//扣减库存 todo //扣减库存
int rows = couponMapper.reduceStock(couponId); int rows = couponMapper.reduceStock(couponId);
if (rows == 1) { if (rows == 1) {
//扣减库存成功才保存记录 //扣减库存成功才保存记录
@ -124,18 +128,8 @@ public class CouponServiceImpl implements CouponService {
} }
} finally { } finally {
// 释放锁 // 释放锁
// 使用lua脚本保证 查询和删除的原子性 rlock.unlock();
String script = "if redis.call('get', KEYS[1]) == ARGV[1] then return redis.call('del', KEYS[1]) else return 0 end"; log.info("解锁成功");
Integer result = redisTemplate.execute(new DefaultRedisScript<>(script, Integer.class), Arrays.asList(lockKey), uuid);
log.info("解锁{}", result);
}
} else {//加锁失败
try {
TimeUnit.SECONDS.sleep(1);
} catch (InterruptedException e) {
log.error("自旋失败");
}
addCoupon(couponId, category);
} }
return JsonData.buildSuccess(); return JsonData.buildSuccess();
} }