DDD on JAVAPRO International

From Spaghetti to Hexagons: A Practical Guide to Clean Java Architecture

Wed, 27 May 2026 07:00:01 +0000

A Culinary Warning and the Dark Side of Code

Welcome, fellow architect and beloved developer, to our hexagonal city-state—a realm where pragmatism reigns supreme and flexibility is our greatest strength. This guide is not an ivory tower doctrine filled with theoretical perfection, but rather a versatile toolbox tempered in the forge of real-world challenges and countless production battlefields.

Before we can erect the citadel of clean architecture, we must first acknowledge the reality of our industry. We must navigate the “Dark Side of Code”. The software world is rife with culinary disasters that would make a chef weep. We are all too familiar with Spaghetti Code^(1), a tangled mess where program flow twists and turns like pasta, making maintenance a nightmare where references and dependencies jump all over the place. But the menu of disaster is extensive.

AI without spaghetti: Clean architecture in the age of AI

Tue, 17 Mar 2026 07:00:01 +0000

When “Just ship it” turns into lasagna code

We start with a familiar scene: a small experiment that grows faster than its architecture can handle. This is exactly the kind of situation where clean architecture becomes essential. Like layering pasta without checking the recipe, we kept adding features until the structure began to wobble.

At first everything seems perfectly reasonable. A quick integration with an API, a prompt that produces surprisingly good results. Suddenly the prototype starts solving real problems. The codebase grows organically: a helper class here, a service there. Maybe a controller that does just a little bit more than it probably should.

Apache Causeway - GOING FURTHER

Thu, 01 Jan 2026 07:00:01 +0000

In this article we’ll continue our exploration of the Apache Causeway, a Spring Boot framework for domain-driven apps following the naked objects pattern. Our focus this time is the framework’s support for validation, on testing, and we’ll also look at some additional UI hints.

Apache Causeway - An Introduction

Tue, 30 Sep 2025 07:00:01 +0000

In this article we explore key concepts of the Apache Causeway framework, learning how it surfaces domain logic directly in the UI, with minimal boilerplate. You’ll gain a practical understanding of how Causeway supports rapid prototyping and domain-driven development.