You're reading from Domain-Driven Refactoring A hands-on DDD guide to transforming monoliths into modular systems and microservices

Product type Paperback

Published in May 2025

Publisher Packt

ISBN-13 9781835889107

Length 324 pages

Edition 1st Edition

Concepts

Application Development

Authors (2):

Alessandro Colla

Alberto Acerbis

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Table of Contents (18) Chapters

Preface

1. Part 1: Why Use Domain-Driven Design to Tackle Complexity?

2. Evolution of Domain-Driven Design FREE CHAPTER

3. Understanding Complexity: Problem and Solution Space

4. Strategic Patterns

5. Tactical Patterns

6. Part 2: Refactoring Legacy Systems

7. Introducing Refactoring Principles

8. Transitioning from Chaos

9. Integrating Events with CQRS

10. Refactoring the Database

11. DDD Patterns for Continuous Integration and Continuous Refactoring

12. Part 3: Moving from Monolith to Microservices

13. When and Why You Should Transition to a Microservices Architecture

14. Dealing with Events and Their Evolution

15. Orchestrating Complexity: Advanced Approaches to Business Processes

16. Other Books You May Enjoy

17. Index

Continuous refactoring within a DDD context

The nature of DDD makes continuous refactoring particularly important because domains are dynamic. Business needs change, markets shift, and organizational strategies evolve. In a static code base, these changes can lead to misalignment between the system’s implementation and the real-world processes it aims to model. Left unchecked, this drift introduces inefficiencies, impairs communication, and hampers agility. Continuous refactoring addresses this by embracing change as a natural part of software development.

At its heart, continuous refactoring in a DDD context is about weaving domain refinement into the fabric of day-to-day development. This means refactoring is not reserved for isolated cleanup phases; it happens every time a new feature is introduced, a bug is fixed, or a domain concept is clarified. For example, when a domain expert provides a new insight into how a business rule operates, the development team should...