https://kevinwang930.github.io/tags/blocking-queue/Recent content in Blocking-Queue on Kevin wang's blogHugoen-USSun, 05 Jul 2026 00:00:00 +0800https://kevinwang930.github.io/post/java/concurrency/blocking-queue/Sun, 05 Jul 2026 00:00:00 +0800https://kevinwang930.github.io/post/java/concurrency/blocking-queue/<p><code>java.util.concurrent.BlockingQueue</code> extends <code>Queue</code> with <strong>blocking insertion and retrieval</strong>: a producer invoking <code>put</code> suspends when capacity is exhausted; a consumer invoking <code>take</code> suspends when no element is available. All JDK implementations are thread-safe and intended for producer–consumer pipelines; their primary deployment is as the <code>workQueue</code> of <code>ThreadPoolExecutor</code>.</p> <p>This article examines the OpenJDK implementations: the dual-condition bounded-buffer pattern, the two-lock design of <code>LinkedBlockingQueue</code>, the heap-backed <code>PriorityBlockingQueue</code>, the zero-capacity rendezvous semantics of <code>SynchronousQueue</code>, and the timed waiting protocol of <code>DelayQueue</code>.</p>