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当您通过阿里云SDK调用OpenAPI进行资源操作时，必须正确配置凭证信息。阿里云的Credentials工具提供了一套强大的功能，使您能够轻松地获取和管理这些访问凭证。无论是利用默认凭证，AccessKey（AK），还是安全令牌服务（STS）令牌等，Credentials工具都能为您提供相应支持。...

[帮助文档] 视频播放的安全令牌怎么获取

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【Java并发编程六】Java线程安全与同步方案（下）

锁的优化措施锁的状态变化分为两种，锁的消除、锁的粗化、内存级别的锁升级以及分段锁的实现。锁消除锁消除是指虚拟机即时编译器在运行时，对一些代码上要求同步，但是被检测到不可能存在共享数据竞争的锁进行消除。锁消除的主要判定依据来源于逃逸分析的数据支持，如果判断在一段代码中，堆上的所有数据都不会逃逸出去从而...

【Java并发编程六】Java线程安全与同步方案（中）

悲观锁的实现方式悲观锁的实现方式也就是加锁，加锁既可以在代码层面（比如Java中的synchronized关键字），也可以在数据库层面（比如MySQL中的排他锁）乐观锁的问题CAS虽然很高效，但是它也存在三大问题，这里简单说一下：ABA问题。CAS需要在操作值的时候检查内...

【Java并发编程六】Java线程安全与同步方案（上）

我们知道面向对象的编程思想是站在现实世界的角度去抽象和解决问题，它把数据和行为都看做是对象的一部分。当多个线程访问一个对象时如果不考虑这些线程在执行时环境下的调度和交替执行，也不需要进行额外的同步，或者在调用方进行任何其他的协调操作，调用这个对象的行为都可以获得正确的结果，那么这个对象就是线程安全的...

[帮助文档] 如何使用安全访问服务Python及Java示例代码

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‍博主介绍：大家好，我是芝士味的椒盐，一名在校大学生，热爱分享知识，很高兴在这里认识大家擅长领域：Java、大数据、运维、电子如果本文章各位小伙伴们有帮助的话，关注+点赞+评论+收藏，相应的有空了我也会回访，互助！！！另本人水平有限，旨在创作简单易懂的文章，在文章描述时如有错，恳请各位大佬指正，在此...

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