The Hexagonal (Component-Based / Ports & Adapters) Architectural Pattern
A Real-Life Scenario & Problem
Scenario: You have a medium-to-large application with complex domain logic—maybe an e-commerce site or a booking system. You want to test your domain code thoroughly, without pulling in external dependencies like a real database or specific frameworks. But currently, domain objects directly reference the DB or an external API, making pure domain tests tricky. You also suspect you’ll want to swap from one…
Howdy 👋
This is an online wiki about the main topics over the last 40 years of software design, architecture & testing. It was created by Khalil Stemmler.
This wiki's mission is to help eliminate the unknown unknowns, helping you get up to speed on the best practices and principles to write testable, flexible, and maintainable code.
I created this wiki while I was connecting the dots on my own path. You can read more about that learning journey in the introduction
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