Advanced Locking Mechanisms

Advanced Java locks exist for the cases where synchronized is correct but not expressive enough. They provide stronger control over lock acquisition, interruption, read/write separation, and optimistic access patterns.

That extra control comes with extra responsibility. These tools are valuable when contention patterns are well understood, but they can make code harder to review if they are introduced casually.

The child pages focus on the main options and when each one is justified: ReentrantLock, ReentrantReadWriteLock, StampedLock, and optimistic techniques.

In this section

• ReentrantLock in Java
  Use `ReentrantLock` in Java when interruption, timed acquisition, fairness, or explicit lock management matter more than `synchronized` simplicity.
• ReentrantReadWriteLock in Java
  Use `ReentrantReadWriteLock` in Java when read-heavy contention patterns justify separate read and write access paths.
• StampedLock in Java
  Use `StampedLock` in Java for optimistic reads and specialized contention patterns when simpler locking is too coarse.
• Optimistic Locking Techniques in Java Concurrency
  Use optimistic locking techniques in Java when read-mostly access patterns justify retries and validation over heavier lock contention.