Understand hexagonal architecture (Ports and Adapters), why it makes applications easier to test and maintain, and how to implement it.
Hexagonal architecture ? also known as the Ports and Adapters pattern ? was conceived by Alistair Cockburn to solve a persistent problem: application logic that is tightly coupled to infrastructure concerns like databases, HTTP frameworks, and external APIs. When your business logic knows about SQL queries or HTTP status codes, it becomes hard to test, hard to swap out technology, and hard to reason about in isolation. Hexagonal architecture draws a clean boundary that fixes all three problems.The Core Idea: Ports and AdaptersThe application sits at the centre of a hexagon. Surrounding it are ...
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