Decouple producers and consumers with async messaging — RabbitMQ, Kafka, SQS patterns for reliable distributed systems.
Five passes over the same idea, each from a different angle. Do them in order, or jump to whichever you need.
Message queues enable asynchronous communication between services. Point-to-point (work queues) vs pub/sub (fan-out) patterns serve different needs. Key concepts: at-least-once vs exactly-once delivery, ordering guarantees, dead-letter queues, backpressure, and idempotent consumers.
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