Book Image

Domain-Driven Design with Golang

By : Matthew Boyle
4 (2)
Book Image

Domain-Driven Design with Golang

4 (2)
By: Matthew Boyle

Overview of this book

Domain-driven design (DDD) is one of the most sought-after skills in the industry. This book provides you with step-by-step explanations of essential concepts and practical examples that will see you introducing DDD in your Go projects in no time. Domain-Driven Design with Golang starts by helping you gain a basic understanding of DDD, and then covers all the important patterns, such as bounded context, ubiquitous language, and aggregates. The latter half of the book deals with the real-world implementation of DDD patterns and teaches you how to build two systems while applying DDD principles, which will be a valuable addition to your portfolio. Finally, you’ll find out how to build a microservice, along with learning how DDD-based microservices can be part of a greater distributed system. Although the focus of this book is Golang, by the end of this book you’ll be able to confidently use DDD patterns outside of Go and apply them to other languages and even distributed systems.
Table of Contents (13 chapters)
Part 1: Introduction to Domain-Driven Design
Part 2: Real -World Domain-Driven Design with Golang


TDD stands for test-driven development. It is a process in which you write tests for business requirements before your software is fully developed. As you write code, you repeatedly update your test cases until you are satisfied the code satisfies the business requirements. The goal is to write “just enough” code to pass the tests and no more. A diagram representing this process is shown here:

Figure 8.1 – TDD flow chart

Let’s look at each of the steps in isolation. If we were developing a new feature for our application, we would do the following:

  1. Add a test: Before we write any code, we write the test case. You might write this in the form of a user story such as “As an API user, I want to be able to see a user’s balance across all their accounts when I call the /balances endpoint so that I can display it on the home screen,” or by using the Given-When-Then method: “Given I am an API user...