Domain-Driven Design in PHP
Domain-Driven Design in PHP
Discover DDD, Architectural Styles, Tactical Design Implementations, and Bounded Context Integration with PHP 7.4 examples
About the Book
In 2014, after two years of reading about and working with Domain-Driven Design, Carlos and Christian, friends and workmates, traveled to Berlin to participate in Vaughn Vernon's Implementing Domain-Driven Design Workshop. The training was fantastic, and all the concepts that were swirling around in their minds prior to the trip suddenly became very real. However, they were almost no PHP developers in a room full of Java and .NET developers.
Around the same time, Keyvan co-founded Funddy, a crowdfunding platform for the masses built on top of the concepts and building blocks of Domain-Driven Design. Domain-Driven Design proved itself effective in the exploratory process and modeling of building an early-stage startup like Funddy. It also helped handle the complexity of the company, with its constantly changing environment and requirements. And after connecting with Carlos and Christian and discussing the book, Keyvan proudly signed on as the third writer.
Domain-Driven Design has arrived to the PHP community with lots of talk but no real code detailing how to implement Tactical DDD patterns or how to integrate Bounded Contexts with REST and/or messaging strategies. Without being in a Training session and no PHP real examples, learning DDD can be challenging.
Together, we've written the book we wanted to have when we started with Domain-Driven Design. It's full of examples, production-ready code, shortcuts, and our recommendations based on our experiences of what worked and what didn't for our respective teams. We arrived at Domain-Driven Design via its building blocks — Tactical Patterns — which is why this book is mainly about them. Reading it will help you learn them, write them, and implement them. You'll also discover how to integrate Bounded Contexts using synchronous and asynchronous approaches, which will open your world to strategic design — though the latter is a road you'll have to discover on your own.
About the Authors
About the Contributors
Addicted to software development, who loves to share the knowledge he learns with others. Enjoys exploring many areas of the field, ranging from algorithms to software architectural design. Co-hosts a weekly development podcast found at ThreeDevsandAMaybe.com. Has worked in an agency setting, freelance and now at MyBuilder.
Reader Testimonials
Raúl Araya (@nubeiro)
Lead Developer at NordPay Financial
Last part of the book should be called “developer p0rn”. I really enjoyed the contents. Looking forward to see it actually finished.
Axxon (@PhronimaAxxon)
Coder and Musician
Thanks for that practical guide about EventStore in PHP. Just need to play with it now!
Paulo Victor (@Pv_Fusion)
Open Source Developer
Currency and Money its great practical example on @dddbook #DDDinPHP
Ignacio Sánchez (@isholgueras)
Front-end and Drupal Developer
I bought it yesterday, awesome book. Highly recommended! Thanks guys!
Tim Glabisch (@timglabisch)
Developer at SensioLabs Deutschland
I bought it yesterday and read all the night. Awesome #book, every #php dev should read!
Fernando Arconada (@farconadaT3)
Author of “Testing for Symfony 2 Applications”
It's an awesome book
Table of Contents
- Foreword by Matthias Noback
-
Preface
- Who Should Read This Book
- DDD and PHP Community
- Summary of Chapters
- Code and Examples
- Acknowledgements
-
About the Authors
- Carlos Buenosvinos
- Christian Soronellas
- Keyvan Akbary
-
Getting Started with Domain-Driven Design
- Why Domain-Driven Design Matters
- The Three Pillars of Domain-Driven Design
- Considering Domain-Driven Design
- The Tricky Parts
- Strategical Overview
- Related Movements: Microservices and Self-Contained Systems
- Wrap-Up
-
Architectural Styles
- Spaghetti Architecture
- Layered Architecture
- Hexagonal Architecture: Inverting Dependencies
- Command Query Responsibility Segregation (CQRS)
- Event Sourcing
- Wrap-Up
-
Value Objects
- Definition
- Value Object vs. Entity
- Currency and Money Example
- Characteristics
- Basic Types
- Testing Value Objects
- Persisting Value Objects
- Security
- Wrap-Up
-
Entities
- Introduction
- Objects vs. Primitive Types
- Identity Operation
- Persisting Entities
- Testing Entities
- Validation
- Entities and Domain Events
- Wrap-Up
-
Services
- Application Services
- Domain Services
- Domain Services and Infrastructure Services
- Testing Domain Services
- Anemic Domain Models vs. Rich Domain Models
- Wrap-Up
-
Domain Events
- Introduction
- Definition
- Characteristics
- Modeling Events
- Doctrine Events
- Persisting Domain Events
- Publishing Events from the Domain Model
- Spreading the News to Remote Bounded Contexts
- Wrap-Up
-
Modules
- General Overview
- Leverage Modules in PHP
- Bounded Contexts and Applications
- Structuring Code in Modules
- Wrap-Up
-
Aggregates
- Introduction
- Key Concepts
- What Is an Aggregate?
- Why Aggregates?
- A Bit of History
- Anatomy of an Aggregate
- Aggregate Design Rules
- Sample Application Service: User and Wishes
- Transactions
- Wrap Up
-
Factories
- Factory Method on Aggregate Root
- Factory on Service
- Testing Factories
- Wrap-Up
-
Repositories
- Definition
- Repositories Are Not DAOs
- Collection-Oriented Repositories
- Persistence-Oriented Repository
- Extra Behavior
- Querying Repositories
- Managing Transactions
- Testing Repositories
- Testing Your Services with In-Memory Implementations
- Wrap-Up
-
Application
- Requests
- Anatomy of an Application Service
- Testing Application Services
- Transactions
- Security
- Domain Events
- Command Handlers
- Wrap-Up
-
Integrating Bounded Contexts
- Integration Through the Data Store
- Integration Relationships
- Implementing Bounded Context Integrations
- Wrap-Up
-
Appendix: Hexagonal Architecture with PHP
- Introduction
- First Approach
- Repositories and the Persistence Edge
- Decoupling Business and Persistence
- Migrating our Persistence to Redis
- Decouple Business and Web Framework
- Rating an idea using the API
- Console app rating
- Testing Rating an Idea UseCase
- Testing Infrastructure
- Arggg, So Many Dependencies!
- Domain Services and Notification Hexagon Edge
- Let’s Recap
- Hexagonal Architecture
- Key Points
- What’s Next?
- The End
- Bibliography
The Leanpub 60-day 100% Happiness Guarantee
Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.
See full terms
Do Well. Do Good.
Authors have earned$11,817,855writing, publishing and selling on Leanpub, earning 80% royalties while saving up to 25 million pounds of CO2 and up to 46,000 trees.
Learn more about writing on Leanpub
Free Updates. DRM Free.
If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).
Most Leanpub books are available in PDF (for computers) and EPUB (for phones, tablets and Kindle). The formats that a book includes are shown at the top right corner of this page.
Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.
Learn more about Leanpub's ebook formats and where to read them
Top Books
- #1
Stratospheric
Tom Hombergs, Björn Wilmsmann, and Philip RiecksFrom Zero to Production with Spring Boot and AWS. All you need to know to get a Spring Boot application into production with AWS. No previous AWS knowledge required.
Go to stratospheric.dev for a tour of the contents.
- #2
C++20 - The Complete Guide
Nicolai M. JosuttisAll new language and library features of C++20 (for those who know previous C++ versions).
The book presents all new language and library features of C++20. Learn how this impacts day-to-day programming, to benefit in practice, to combine new features, and to avoid all new traps.
Buy early, pay less, free updates.
Other books:
- #3
OpenIntro Statistics
David Diez, Christopher Barr, Mine Cetinkaya-Rundel, and OpenIntroA complete foundation for Statistics, also serving as a foundation for Data Science.
Leanpub revenue supports OpenIntro (US-based nonprofit) so we can provide free desk copies to teachers interested in using OpenIntro Statistics in the classroom and expand the project to support free textbooks in other subjects.
More resources: openintro.org.
- #4
node-opcua by example
Etienne RossignonGet the best out of node-opcua through a set of documented examples by the author himself that will allow you to create stunning OPCUA Servers or Clients.
- #5
Advanced Web Application Architecture
Matthias NobackThe missing manual for making your web applications future-proof
- #6
Jetpack Compose internals
Jorge CastilloJetpack Compose is the future of Android UI. Master how it works internally and become a more efficient developer with it. You'll also find it valuable if you are not an Android dev. This book provides all the details to understand how the Compose compiler & runtime work, and how to create a client library using them.
- #7
Ansible for DevOps
Jeff GeerlingAnsible is a simple, but powerful, server and configuration management tool. Learn to use Ansible effectively, whether you manage one server—or thousands.
- #8
R Programming for Data Science
Roger D. PengThis book brings the fundamentals of R programming to you, using the same material developed as part of the industry-leading Johns Hopkins Data Science Specialization. The skills taught in this book will lay the foundation for you to begin your journey learning data science. Printed copies of this book are available through Lulu.
- #9
Thinking with Types
Sandy MaguireThis book aims to be the comprehensive manual for type-level programming. It's about getting you from here to there---from a competent Haskell programmer to one who convinces the compiler to do their work for them.
- #10
Maîtriser Apache JMeter
Philippe Mouawad, Bruno Demion (Milamber), and Antonio Gomes RodriguesToute la puissance d'Apache JMeter expliquée par ses commiteurs et utilisateurs experts. De l'intégration continue en passant par le Cloud, vous découvrirez comment intégrer JMeter à vos processus "Agile" et Devops.
If you're looking for the newer english version of this book, go to Master JMeter : From load testing to DevOps
Top Bundles
- #1
CCIE Service Provider Ultimate Study Bundle
2 Books
Piotr Jablonski, Lukasz Bromirski, and Nick Russo have joined forces to deliver the only CCIE Service Provider training resource you'll ever need. This bundle contains a detailed and challenging collection of workbook labs, plus an extensively detailed technical reference guide. All of us have earned the CCIE Service Provider certification... - #3
Software Architecture
2 Books
"Software Architecture for Developers" is a practical and pragmatic guide to modern, lightweight software architecture, specifically aimed at developers. You'll learn:The essence of software architecture.Why the software architecture role should include coding, coaching and collaboration.The things that you really need to think about before... - #4
Pattern-Oriented Memory Forensics and Malware Detection
2 Books
This training bundle for security engineers and researchers, malware and memory forensics analysts includes two accelerated training courses for Windows memory dump analysis using WinDbg. It is also useful for technical support and escalation engineers who analyze memory dumps from complex software environments and need to check for possible... - #5
Practical FP in Scala + Functional event-driven architecture
2 Books
Practical FP in Scala (A hands-on approach) & Functional event-driven architecture, aka FEDA, (Powered by Scala 3), together as a bundle! The content of PFP in Scala is a requirement to understand FEDA so why not take advantage of this bundle!? - #10
Cloud Architect: Transform Technology and Organization
2 Books
Architects don't just recite product names and features. They understand the options, decisions, and trade-offs behind them. They earn credibility and maintain authenticity by connecting the penthouse with the engine room. Get two essential books that redefine the role of the software and IT architect at one low price:37 Things One Architect...
