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Publish-Subscribe Pattern

Learn how RabbitMQ's fanout exchange implements publish-subscribe messaging, decoupling producers from any number of independent subscribers.

Redis Pub/Sub

Learn how Redis's publish/subscribe messaging model works, its fire-and-forget delivery guarantees, and when to reach for Streams instead.

Publishers and @MainActor

Learn how to safely deliver Combine publisher values to the main thread using @MainActor and .receive(on:), and how actor isolation interacts with reactive pip…