Recent Posts (software architecture)

String Boot Hexagonal Architecture Example

• By Ercan
• 25/10/2025

Architectural concepts like ports, adapters, domain, infrastructure frequently feel abstract when you first read about them. To move from theory to intuition I built a small, multi-module Spring Boot project: a calculator that performs addition, subtraction, multiplication and division, and logs every calculation to a database. The point of this project is not complex business logic — it’s to show how Hexagonal Architecture (aka Ports & Adapters) organizes code so the domain remains framework- and I/O-agnostic, while adapters provide concrete interfaces to the outside world (REST, SOAP,..