重复借款问题
解决方案:redis锁
Talk is cheap,Show me the code 别BB,给我直接展示代码
生成核心代码
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，已加锁 true 不存在 放入成功 加锁成功
boolean lock = redisTemplate.opsForValue().setIfAbsent(creatOrderKey, currentTime);
try {
if (lock) {//加锁成功
//校验各种信息，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);
Long nowTime = System.currentTimeMillis();
Long time = (nowTime - createTime) / 1000;
if (time > 30l) {
logger.info("超过30秒，释放锁！");
redisTemplate.delete(creatOrderKey);
}
}
}
还款重复划扣
锁单,代码逻辑同上
String orderno = repayVo.getOrderNo();
String key = "repay:" + orderno;
Long currentTime = System.currentTimeMillis();
boolean lock = redisTemplate.opsForValue().setIfAbsent(key, currentTime);
try {
if (lock) {
logger.info("还款逻辑处理 );
return xx;
}else{
logger.info("还款业务进行中");
return xx;
}
}catch (Exception e){
logger.error("还款：系统异常",e);
return xx;
}finally {
if (lock) {
redisTemplate.delete(key);
logger.info("还款：任务结束，释放锁!");
} else {
logger.info("还款：没有获取到锁，无需释放锁!");
Long createTime = (Long) redisTemplate.opsForValue().get(key);
Long nowTime = System.currentTimeMillis();
Long time = (nowTime - createTime) / 1000;
if (time > 20l) {
redisTemplate.delete(key);
logger.info("还款：超过20秒，释放锁！");
}
}
}