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Designing Hexagonal Architecture with Java

You're reading from  Designing Hexagonal Architecture with Java

Product type Book
Published in Jan 2022
Publisher Packt
ISBN-13 9781801816489
Pages 460 pages
Edition 1st Edition
Languages
Author (1):
Davi Vieira Davi Vieira
Profile icon Davi Vieira
Toc

Table of Contents (21) Chapters close

Preface 1. Section 1: Architecture Fundamentals
2. Chapter 1: Why Hexagonal Architecture? 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

Dealing with multiple adapter categories

In the context of the hexagonal architecture, adapters help us to increase the hexagonal system's compatibility with different protocols and technology. In the Framework hexagon, we finally decide how the system will expose its features through input adapters and how it will communicate with external systems through output adapters.

In a similar way to what happens in the Application and Domain hexagons, the Framework hexagon is encapsulated in its own Java module. This module approach helps us enforce the boundaries between each system hexagon. From the Framework hexagon's perspective, it's good to group all input and output adapters within the same module. Although modularization can help us delimit boundaries, it is not enough to prevent the maintainability challenges we may face when dealing with multiple adapter categories.

What I mean by adapter category is a classification to group adapters that enable the integration...

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