ExecutorService（特别是ThreadPoolExecutor）线程安全吗？ [英] Is ExecutorService (specifically ThreadPoolExecutor) thread safe?

问题描述

ExecutorService 是否保证线程安全？

Does the ExecutorService guarantee thread safety ?

我将从不同的线程向同一个ThreadPoolExecutor提交作业，在交互/提交任务之前是否必须同步对执行程序的访问？

I'll be submitting jobs from different threads to the same ThreadPoolExecutor, do I have to synchronize access to the executor before interacting/submitting tasks?

推荐答案

这是真的，有问题的JDK类似乎没有明确保证线程安全的任务提交。但是，实际上，库中的所有ExecutorService实现都是以这种方式确实是线程安全的。我认为依靠这个是合理的。由于实现这些功能的所有代码都放在公共领域，因此绝对没有动机让任何人以不同的方式完全重写它。

It's true, the JDK classes in question don't seem to make an explicit guarantee of thread-safe task submission. However, in practice, all ExecutorService implementations in the library are indeed thread-safe in this way. I think it's reasonable to depend on this. Since all the code implementing these features was placed in the public domain, there's absolutely no motivation for anyone to completely rewrite it a different way.

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