Achieving maintainability with hexagonal architecture
summary
Claim: hexagonal architecture makes Go apps maintainable, testable and easy to change. It uses dependency injection and interfaces so the domain defines ports and outer layers supply adapters (HTTP, database). Typical designs expose 3–5 ports. Concrete outcomes: unit-heavy domain tests, a few end-to-end UI tests, easy swapping of MySQL for NoSQL, and a code layout that keeps business logic isolated and cheaply verifiable.
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