asmhatre/java-core-examples
1
0
Fork 0
Code Activity

synchronizers: CountDownLatch vs CyclicBarrier vs Phaser vs Semaphore

Browse Source 
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
This commit is contained in:
asmhatre
2026-09-30 06:43:52 +00:00
co-authored by Claude Sonnet 5
parent 0819993c51
commit 55ee850a75
20 changed files with 962 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
README.md
+1
View File
@@ -9,6 +9,7 @@ article; each module's own README has that article's version table, quickstart,
| [`locks`](locks/) | synchronized vs ReentrantLock vs StampedLock: Benchmarks and a Decision Table |
| [`atomics`](atomics/) | Java Atomics and VarHandle: CAS, LongAdder, and When Atomics Beat Locks |
| [`vt-pinning`](vt-pinning/) | Diagnosing Virtual Thread Pinning in Production: JFR Events, jcmd, and Real Fixes |
| [`synchronizers`](synchronizers/) | CountDownLatch vs CyclicBarrier vs Phaser vs Semaphore in Java |
## License