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Enterprise Integration Patterns: Mastering the Idempotent Receiver

"In distributed systems, the guarantee of "exactly-once" delivery is often a theoretical ideal rather than a practical reality. Network failures, timeouts, and infrastructure restarts frequently lead to messages being delivered multiple times. The Idempotent Receiver pattern is the critical architectural solution to this problem, ensuring that a system can process the same message multiple times without changing the result beyond the initial application. When a message is consumed, the receiver must determine if it has already processed that specific message. If it has, it should discard the duplicate; if not, it proceeds with the business log..."

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