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

Product type Paperback

Published in Jan 2022

Publisher Packt

ISBN-13 9781801816489

Length 460 pages

Edition 1st Edition

Languages

Java

Tools

Quarkus

Concepts

Software Architecture

Author (1):

Davi Vieira

View More author details

Table of Contents (21) Chapters

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

Chapter 7: Building the Application Hexagon

Once we have a foundation provided by the Domain hexagon, we can build the remaining part of the system on top of this. It's time to think about how the system will coordinate the handling of different data and behaviors to fulfill the needs of different actors and we will explore this through a discussion of use case examples. To accomplish this, we need to create the Application hexagon on top of the foundation defined by the Domain hexagon.

To continue building the modular structure initiated in the previous chapter, where we configured the Domain hexagon as a Java module, we will continue to use the modular approach by defining the Application hexagon as the second Java module of our hexagonal system.

In order to provide a better view of the system's capabilities, one recommended approach is to use Cucumber, which is a well-known behavior-driven development technology that uses concepts such as features and scenarios to...