How to Implement the Outbox Pattern in Go and PostgreSQL

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How to Implement the Outbox Pattern in Go and PostgreSQL
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In event-driven systems, two things need to happen when you process a request: you need to save data to your database, and you need to publish an event to a message broker so other services know something changed. These two operations look simple, but they hide a dangerous reliability problem. What if the database write succeeds but the message broker is temporarily unreachable. Or your service crashes between the two steps. You end up in an inconsistent state: your database has the new data, but the rest of the system never heard about it...

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