Java: Synchronizing on primitives?

Question

In our system, we have a method that will do some work when it\'s called with a certain ID:

public void doWork(long id) { /* ... */ }

Now, this

Answer 1

I invented a thing like that for myself some time ago. I call it an equivalence-class lock, meaning, it locks on all of the things that are equal to the given thing. You can get it from my github, and use it subject to the Apache 2 license, if you like, or just read it and forget it!