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RabbitMQ cheat sheet & developer notes

RabbitMQ cheat sheet and 2 curated developer notes — core concepts, patterns, and interview prep. Maintained by the DevRecall team.

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01 · RabbitMQ

Producers, Exchanges, Queues & Routing

Producers, Exchanges, Queues & Routing. The Core Model. An open-source message broker implementing AMQP. A producer publishes messages; a consumer receives/processes them; they never talk directly — RabbitMQ decouples th…

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02 · RabbitMQ

Reliability: Acks, Durability, Prefetch & Dead Letters

Reliability: Acks, Durability, Prefetch & Dead Letters. Acknowledgment. A consumer explicitly acks a message once processed; RabbitMQ only removes it then. If a consumer crashes before acking, the message gets redelivere…

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Concepts to know for RabbitMQ

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Message Queues and At-Least-Once DeliveryWhy a broker can promise at-least-once but never exactly-once, queue versus log, and how idempotent consumers and the outbox make delivery effectively once.Intermediate·14 minThe Transactional Outbox PatternWhy saving to the database and publishing an event can never be atomic, how an outbox table plus a relay fixes it, and what ordering and duplicates still cost.Intermediate·13 min

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