samdeepthink

Oct 12, 2026 · Backend Development

Java CyclicBarrier Deep Dive: Batch Synchronization Patterns & Design Improvements

This article explains Java's CyclicBarrier through two practical examples: coordinating concurrent API stress tests and batch-importing one million Excel rows, then reveals a design flaw where the main thread participates in the barrier and shows how to separate concerns using CountDownLatch for cleaner batch processing.