Mid-sized building blocks and hexagonal architecture
summary
Examines common Java design problems—overuse of public classes, ignored package-private scope, excessive inheritance and IoC registrations—and shows concrete ways to improve module boundaries using Domain-Driven Design, package-private visibility, sensible packaging, CQRS for microservices, and hexagonal (ports-and-adapters) architecture. Includes real-world project examples and practical guidance on applying these technologies and techniques in Java codebases.
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