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Designing Hexagonal Architecture with Java

You're reading from   Designing Hexagonal Architecture with Java An architect's guide to building maintainable and change-tolerant applications with Java and Quarkus

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Product type Paperback
Published in Jan 2022
Publisher Packt
ISBN-13 9781801816489
Length 460 pages
Edition 1st Edition
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Author (1):
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Davi Vieira Davi Vieira
Author Profile Icon Davi Vieira
Davi Vieira
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Table of Contents (21) Chapters Close

Preface 1. Section 1: Architecture Fundamentals
2. Chapter 1: Why Hexagonal Architecture? FREE CHAPTER 3. Chapter 2: Wrapping Business Rules inside Domain Hexagon 4. Chapter 3: Handling Behavior with Ports and Use Cases 5. Chapter 4: Creating Adapters to Interact with the Outside World 6. Chapter 5: Exploring the Nature of Driving and Driven Operations 7. Section 2: Using Hexagons to Create a Solid Foundation
8. Chapter 6: Building the Domain Hexagon 9. Chapter 7: Building the Application Hexagon 10. Chapter 8: Building the Framework Hexagon 11. Chapter 9: Applying Dependency Inversion with Java Modules 12. Section 3: Becoming Cloud-Native
13. Chapter 10: Adding Quarkus to a Modularized Hexagonal Application 14. Chapter 11: Leveraging CDI Beans to Manage Ports and Use Cases 15. Chapter 12: Using RESTEasy Reactive to Implement Input Adapters 16. Chapter 13: Persisting Data with Output Adapters and Hibernate Reactive 17. Chapter 14: Setting Up Dockerfile and Kubernetes Objects for Cloud Deployment 18. Chapter 15: Good Design Practices for Your Hexagonal Application 19. Assessments 20. Other Books You May Enjoy

Bootstrapping the Application hexagon

The Application hexagon orchestrates internal requests through the Domain hexagon and external requests through the Framework hexagon. We construct the system's features based on the domain model provided by the Domain hexagon with ports and use cases. In the Application hexagon, we don't specify any constraint or business rule. Instead, our aim for the Application hexagon is to define and control the data flow in the hexagonal system.

To continue developing the topology and inventory system, we have to bootstrap the Application hexagon as a Maven and Java module. Let's start with the Maven configuration:

mvn archetype:generate \
  -DarchetypeGroupId=de.rieckpil.archetypes  \
  -DarchetypeArtifactId=testing-toolkit \
  -DarchetypeVersion=1.0.0 \
  -DgroupId=dev.davivieira \
  -DartifactId=application \
  -Dversion=1.0-SNAPSHOT \
  -Dpackage=dev...
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