重复借款问题
解决方案:redis锁
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生产核心代码
String creatOrderKey = "Loan:" + loanCreateReqDto.getUserId(); //锁用户id
Long currentTime = System.currentTimeMillis();
//userId放入redis false key之前已经存在会返回false,不存在 加锁成功true(获取到锁)
boolean lock = redisTemplate.opsForValue().setIfAbsent(creatOrderKey, currentTime);
try {
if (lock) {//加锁成功
//校验各种信息,逻辑处理,生成借款订单
logger.info("借款:结果:resultDto:{}",JSON.toJSONString(resultDto));
} else {//加锁失败
logger.info("任务已在进行中,,稍后再试");
}
} catch (Exception e) {
logger.info("借款异常 ", e);
} finally {
if (lock) {
redisTemplate.delete(creatOrderKey);
logger.info("任务结束,释放锁!");
} else {
logger.info("(当前线程)没有获取到锁,无需释放锁!");
Long createTime = (Long) redisTemplate.opsForValue().get(creatOrderKey);