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 Designing Hexagonal Architecture with Java

You're reading from   Designing Hexagonal Architecture with Java Build maintainable and long-lasting applications with Java and Quarkus

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Product type Paperback
Published in Sep 2023
Publisher Packt
ISBN-13 9781837635115
Length 438 pages
Edition 2nd 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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Toc

Table of Contents (24) Chapters Close

Preface 1. Part 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. Part 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. Part 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. Part 4: Hexagonal Architecture and Beyond
19. Chapter 15: Comparing Hexagonal Architecture with Layered Architecture 20. Chapter 16: Using SOLID Principles with Hexagonal Architecture 21. Chapter 17: Good Design Practices for Your Hexagonal Application 22. Index 23. Other Books You May Enjoy

Defining use cases

The topology and inventory system allows users to manage network resources such as routers, switches, and networks. To enable this management, we created a domain model in the previous chapter that represents the relationship between those resources. What we have to do now is construct the system’s features in terms of the domain model. These features represent user intent when interacting with the system.

To make it possible to express use cases in both written and code form, we use Cucumber, a valuable tool to enable non-technical people to grasp the use cases that exist in the code.

By relying on Cucumber concepts such as features and scenarios, we can create use case descriptions that are easy to follow. The use case descriptions that are shaped using Cucumber can serve as references to develop use case interfaces.

Before creating the use case interfaces for the topology and inventory system, we first need to structure the use cases in feature...

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