Learn how to design and implement automatic order expiration in e‑commerce systems using three approaches—simple scheduled table scans, delayed message queues, and a Redis time‑wheel—detailing their trade‑offs, code examples, indexing tips, distributed locking, and failure‑handling strategies.
This article explains various approaches to delayed task handling—such as database polling, JDK DelayQueue, Redis expiration listeners, Redisson delay queues, RocketMQ delayed messages, and RabbitMQ dead‑letter queues—evaluating their advantages, drawbacks, and best‑practice recommendations for reliable order‑expiration workflows.
This article examines common payment system anomalies such as duplicate charges and order expiration, explains how asynchronous and synchronous payment flows contribute to these issues, and provides both pre‑payment and post‑payment strategies—including UI improvements, return URLs, status checks, and automated refunds—to prevent and resolve them.
