order auto‑closure

Selected Java Interview Questions

Jul 18, 2022 · Backend Development

Implementing Automatic Order Closure in E‑commerce: Scheduled Tasks, RocketMQ Delay Queue, RabbitMQ DLQ, Time Wheel, and Redis Expiration Listener

The article examines five backend techniques for automatically closing unpaid e‑commerce orders—scheduled tasks, RocketMQ delayed messages, RabbitMQ dead‑letter queues, a time‑wheel algorithm, and Redis key‑expiration listeners—detailing their principles, advantages, drawbacks, and sample Java code implementations.