Clean Applications with Hexagonal Architecture: Building maintainable microservices and modular monoliths

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Modern architectural styles like "hexagonal," "clean," and "onion" all share a straightforward principle: business logic should sit at the center of your software, free of frameworks, databases, user interfaces, and external services. The tricky bit comes when you start putting these ideas into practice when you're refactoring a legacy enterprise mudball, implementing microservices, or building a "modulith" in Spring. This book...