Webb10 apr. 2024 · 超卖这样的线程安全问题，解决方案有哪些1.悲观锁：添加同步锁，让线程串行执行优点：简单粗暴缺点：性能一般2.乐观锁：不加锁，在更新时判断是否有其他线程在修改优点：性能好存在成功率低的问题分布式锁：满足分布式系统或集群模式下多进程可见并且互斥的锁1.基于Redis的分布式锁实现 ... Webb1. 全局唯一id在秒杀后生成的订单，订单id的设计是值得考虑的。是采用数据库的自增？必然是不行的，首先若是一张订单表，其表的容量是有上限的，且订单的数据量巨大，若是采用多库多表进行存储，那么每个表自增id都是从1开始，会造成订单id的重复，且自增id规律性强，容易被猜测，具有安全 ...
Redis：分布式锁 - 简书
To lock your methods you need to first enable locking as described in the previous section. Spring BeanPostProcessor will handle all @Locked methods including their aliases. The type field describes which implementation of the lock to use. WebbDistributed lock ensures your method cannot be run in parallel from multiple JVMs (cluster of servers, microservices, … ). It uses a common store to keep track of used locks and your method needs to acquire one or more locks to run. the wall released
Class: SimpleRedisLock::SimpleLock — Documentation for …
WebbAchieve substantially distributed lock process is as follows: 1, by setting a lock set command. 2, it is determined whether the result is returned OK. 1) Nil, acquisition has … Webbpublic class SimpleRedisLock implements ILock { //锁的前缀 private static final String KEY_PREFIX = "lock:"; //具体业务名称，将前缀和业务名拼接之后当做Key private String name; //这里不需要@Autowired，因为该对象是我们使用构造函数手动new出来的 private StringRedisTemplate stringRedisTemplate; public SimpleRedisLock(String name, … Webbsimple_lock = SimpleRedisLock. create (Redis. new) # or just SimpleRedisLock.create Thread. new do simple_lock. lock (' task_384 ', 10) do sleep 0.100 # Run critical code … the wall reno menu