Designing Hexagonal Architecture with Java: An architect's guide to building maintainable and change-tolerant applications with Java and Quarkus

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Designing Hexagonal Architecture with Java: An architect's guide to building maintainable and change-tolerant applications with Java and Quarkus

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內容描述

A practical guide for software architects and Java developers to build cloud-native hexagonal applications using Java and Quarkus to create systems that are easier to refactor, scale, and maintain
Key Features

Learn techniques to decouple business and technology code in an application
Apply hexagonal architecture principles to produce more organized, coherent, and maintainable software
Minimize technical debts and tackle complexities derived from multiple teams dealing with the same code base

Book Description
Hexagonal architecture enhances developers' productivity by decoupling business code from technology code, making the software more change-tolerant, and allowing it to evolve and incorporate new technologies without the need for significant refactoring. By adhering to hexagonal principles, you can structure your software in a way that reduces the effort required to understand and maintain the code.
This book starts with an in-depth analysis of hexagonal architecture's building blocks, such as entities, use cases, ports, and adapters. You'll learn how to assemble business code in the Domain hexagon, create features by using ports and use cases in the Application hexagon, and make your software compatible with different technologies by employing adapters in the Framework hexagon. Moving on, you'll get your hands dirty developing a system based on a real-world scenario applying all the hexagonal architecture's building blocks. By creating a hexagonal system, you'll also understand how you can use Java modules to reinforce dependency inversion and ensure the isolation of each hexagon in the architecture. Finally, you'll get to grips with using Quarkus to turn your hexagonal application into a cloud-native system.
By the end of this hexagonal architecture book, you'll be able to bring order and sanity to the development of complex and long-lasting applications.
What you will learn

Find out how to assemble business rules algorithms using the specification design pattern
Combine domain-driven design techniques with hexagonal principles to create powerful domain models
Employ adapters to make the system support different protocols such as REST, gRPC, and WebSocket
Create a module and package structure based on hexagonal principles
Use Java modules to enforce dependency inversion and ensure isolation between software components
Implement Quarkus DI to manage the life cycle of input and output ports

Who this book is for
This book is for software architects and Java developers who want to improve code maintainability and enhance productivity with an architecture that allows changes in technology without compromising business logic, which is precisely what hexagonal architecture does. Intermediate knowledge of the Java programming language and familiarity with Jakarta EE will help you to get the most out of this book.

目錄大綱

Table of Contents

Why Hexagonal Architecture?
Wrapping Business Rules inside Domain Hexagon
Handling Behavior with Ports and Use Cases
Creating Adapters to Interact with the Outside World
Exploring the Nature of Driving and Driven Operations
Building the Domain Hexagon
Building the Application Hexagon
Building the Framework Hexagon
Applying Dependency Inversion with Java Modules
Adding Quarkus to a Modularized Hexagonal Application
Leveraging CDI Beans to Manage Ports and Use Cases
Using RESTEasy Reactive to Implement Input Adapters
Persisting Data with Output Adapters and Hibernate Reactive
Setting Up Dockerfile and Kubernetes Objects for Cloud Deployment
Good Design Practices for Your Hexagonal Application

作者介紹

Davi Vieira is a software craftsman with a vested interest in the challenges faced by large enterprises in software design, development, and architecture. He has more than 10 years of experience constructing and maintaining complex, long-lasting, and mission-critical systems using object-oriented languages. He values the good lessons and the software development tradition left by others who came before him. Inspired by this software tradition, he develops and evolves his ideas.