如何处理并发情况下涉及多个表下数据的操作?
产品给的需求是: 做一个抽奖活动，用户每天的抽奖次数有限(根据其当天的消费行为获得)，用户如果中奖，那么就要修改用户今天抽了几次，修改用户资产(发放奖励)，增加一条log。
这里就涉及多个表需要防止并发，log表要防止并发insert, 用户表要防止并发update， 资产表要防止并发insert与update。
现在的问题是如何防止高并发时（包括恶意攻击）出现重复操作？
用队列处理只适合被抽奖的奖品有限的情况，但坑爹的产品还提出一种奖品数量没有限制的抽奖（抽奖发虚拟币）-_-#
回复内容：
产品给的需求是: 做一个抽奖活动，用户每天的抽奖次数有限(根据其当天的消费行为获得)，用户如果中奖，那么就要修改用户今天抽了几次，修改用户资产(发放奖励)，增加一条log。
这里就涉及多个表需要防止并发，log表要防止并发insert, 用户表要防止并发update， 资产表要防止并发insert与update。
现在的问题是如何防止高并发时（包括恶意攻击）出现重复操作？
用队列处理只适合被抽奖的奖品有限的情况，但坑爹的产品还提出一种奖品数量没有限制的抽奖（抽奖发虚拟币）-_-#
保证一致性和原子性就需要使用事务，我之前碰到这类问题的解决方案是写入队列，后台进程异步处理并使用事务来保证
redis inc数量，判断数量然后再插log
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