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

Revisiting the JVM

The Virtual Machine (VM) concept wasn't something new when Java arrived back in 1995. Before that time, many other languages used VMs, though they weren't so popular among developers. Java architects decided to use VMs because they wanted a mechanism to create platform independence to improve developer productivity.

Before elaborating on the VM concept, let's first check what we can run inside a VM for Java. In languages such as C or C++, we compile source code into a native code tailored for a specific operating system and CPU architecture. When programming in Java, we compile the source code into bytecode. The JVM understands the instructions contained in bytecode.

The VM idea comes from a concept where it is possible to run programs in an intermediate or virtual environment sitting atop the real machine. In such an arrangement, the program does not need to communicate directly with the underlying operating system—the program deals only...

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

Table of Contents (21) Chapters

Revisiting the JVM

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Table of Contents (21) Chapters

Revisiting the JVM

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