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'd say you're already pretty far to having a solution. Make a LockManager who lazily and reference-counted-ly manages those locks for you. Then use it in doWork:

public void doWork(long id) {
    LockObject lock = lockManager.GetMonitor(id);
    try {
        synchronized(lock) {
            // ...
        }
    } finally {
        lock.Release();
    }
}