Book Image

Domain-Driven Design in PHP

By : Keyvan Akbary, Carlos Buenosvinos, Christian Soronellas
Book Image

Domain-Driven Design in PHP

By: Keyvan Akbary, Carlos Buenosvinos, Christian Soronellas

Overview of this book

Domain-Driven Design (DDD) has arrived in the PHP community, but for all the talk, there is very little real code. Without being in a training session and with no PHP real examples, learning DDD can be challenging. This book changes all that. It details how to implement tactical DDD patterns and gives full examples of topics such as integrating Bounded Contexts with REST, and DDD messaging strategies. In this book, the authors show you, with tons of details and examples, how to properly design Entities, Value Objects, Services, Domain Events, Aggregates, Factories, Repositories, Services, and Application Services with PHP. They show how to apply Hexagonal Architecture within your application whether you use an open source framework or your own.
Table of Contents (24 chapters)
Title Page
Credits
Foreword
About the Authors
Acknowledgments
www.PacktPub.com
Customer Feedback
Dedication
Preface
14
Bibliography
15
The End

Key Concepts


Persistence engines — and databases in particular — have some features for fighting data inconsistencies: ACID, constraints, referential integrity, locking, concurrency controls, and transactions. Let's review these concepts before working with Aggregates.

Most of these concepts are on the Internet and available to the public. We want to thank the people at Oracle, PostgreSQL, and Doctrine for doing amazing work with their documentation. They have carefully defined and explained these important terms, and rather than reinvent the wheel, we've compiled some of these official explanations to share with you.

ACID

As discussed in a previous section, ACID stands for atomicity, consistency, isolation, and durability. According to the MySQL Glossary:

These properties are all desirable in a database system, and are all closely tied to the notion of a transaction. For example, the transactional features of MySQL InnoDB engine adhere to the ACID principles.

Transactions are atomic units of...