asmhatreandClaude Sonnet 5
55ee850a75
One three-round worker pipeline implemented with CountDownLatch (one latch per round), CyclicBarrier (reusable, with a barrier action), and Phaser (reusable, plus dynamic mid-run registration), alongside Semaphore solving the genuinely different problem of bounding concurrent access. Covers timeout behavior (CyclicBarrier permanently breaks on one timeout, Phaser doesn't) and virtual-thread compatibility, including the corrected finding that Object.wait() releases its monitor and never pinned, unlike Thread.sleep() inside synchronized. Co-Authored-By: Claude Sonnet 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01FhzLY5p6okFva3qsnsRyvM
java-core-examples
Runnable companion code for ankurm.com's Java-core / concurrency series. One Maven module per article; each module's own README has that article's version table, quickstart, and traps.
| Module | Post |
|---|---|
jmm |
The Java Memory Model Explained: volatile, happens-before, and Why Your Double-Checked Lock Failed |
locks |
synchronized vs ReentrantLock vs StampedLock: Benchmarks and a Decision Table |
atomics |
Java Atomics and VarHandle: CAS, LongAdder, and When Atomics Beat Locks |
vt-pinning |
Diagnosing Virtual Thread Pinning in Production: JFR Events, jcmd, and Real Fixes |
synchronizers |
CountDownLatch vs CyclicBarrier vs Phaser vs Semaphore in Java |
License
MIT - see LICENSE.