java并发问题乐观锁悲观锁

Java并发问题——乐观锁与悲观锁以及乐观锁的一种实现方式-CAS

首先介绍一些乐观锁与悲观锁:悲观锁：总是假设最坏的情况，每次去拿数据的时候都认为别人会修改，所以每次在拿数据的时候都会上锁，这样别人想拿这个数据就会阻塞直到它拿到锁。传统的关系型数据库里边就用到了很多这种锁机制，比如行锁，...

Java并发问题-乐观锁与悲观锁以及乐观锁的一种实现方式-CAS

文章目录一、悲观锁二、乐观锁三、乐观锁 CAS 三大问题一、悲观锁假设有 2 22 个线程,线程 A 和线程 B;线程 A 访问共享资源,线程 B 等待,一旦线程 A 访问结束,线程 B 访问该共享资源;悲观锁:只要有线程来操作共享资源,就认为肯定有...

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