Rare Earth Juejin Tech Community
Oct 6, 2025 · Backend Development
How Spring Task and Quartz Schedule Jobs: Inside the DelayedWorkQueue and Heap Algorithm
This article explains how Spring Task and Quartz achieve timed job execution by using a DelayedWorkQueue backed by a binary min‑heap, detailing the scheduling flow, task ordering, and core heap operations with illustrative code examples.
Backend DevelopmentDelayedWorkQueueJava concurrency
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