layout	pattern
title	Hexagonal Architecture
folder	hexagonal
permalink	/patterns/hexagonal/
categories	Architectural
tags	Java Difficulty-Expert

Also known as

• Ports and Adapters
• Clean Architecture
• Onion Architecture

Intent

Allow an application to equally be driven by users, programs, automated test or batch scripts, and to be developed and tested in isolation from its eventual run-time devices and databases.

Applicability

Use Hexagonal Architecture pattern when

• it is important that the application is fully testable
• you use Domain Driven Design methodology and/or Microservices architectural style

Real world examples

• Apache Isis

Credits

• Alistair Cockburn - Hexagonal Architecture