Hexagonal Architecture By Example

A practical guide to creating maintainable applicatiions

What you'll learn

How to correctly define hexagonal architecture

How to apply hexagonal architecture in practice

How to make informed compromises when implementing hexagonal architecture

What are pros and cons of hexagonal architecture

Requirements

You must know how to program in Java. It would be great if you're at least somewhat familiar with Spring.

Description

In this course, you will learn how to design and develop Java Spring Boot applications using the principles of Hexagonal Architecture (also known as Ports and Adapters). This architectural style is gaining popularity due to its ability to create flexible, maintainable, and easily testable applications that are decoupled from their external dependencies. Whether you’re new to this concept or looking to deepen your understanding, this course will guide you step-by-step through its application in real-world projects.We’ll start by explaining the core ideas behind Hexagonal Architecture and why it is so powerful. You’ll learn how to separate the domain logic from infrastructure concerns, making your code more modular and easier to maintain. Through clear examples, we’ll show how Hexagonal Architecture enables applications to remain independent of frameworks, databases, or external services, allowing for greater adaptability and testability.Using a hands-on approach, I’ll walk you through building a Java Spring Boot application from the ground up, implementing Hexagonal Architecture principles in every layer. You’ll learn how to define and manage Ports (interfaces) and Adapters (implementations), as well as how to effectively structure your application to allow for easy integration of external services like databases, APIs, or message brokers.This course is ideal for Java developers who want to enhance their software design skills and create clean, maintainable applications using modern architectural techniques.

Overview

Section 1: Introduction

Lecture 1 What is Hexagonal Architecture

Section 2: Practical example

Lecture 2 Package structure

Lecture 3 Business logic implementation

Lecture 4 Infrastructure

Lecture 5 Assembling it together

Lecture 6 New use case. Let's add some code!

Lecture 7 Verifying new use case

Lecture 8 Refactoring

Section 3: Summary

Lecture 9 Summary

Java developers, though anyone programming in a statically-typed language can benefit from this knowledge.