Node.js User Reminder Queues: Idempotent Retries for At-Least-Once Message Delivery

If a user receives the same reminder twice, assume the queue delivered the message twice. That is the useful diagnosis. Short answer: treat consumption as at-least-once, write a durable reminder send key before calling your email or SMS provider, and acknowledge the message only after that state is safe. This is the least complex design that... Weiterlesen: Node.js User Reminder Queues: Idempotent Retries for At-Least-Once Me…