Book Image

Domain-Driven Design with Golang

By : Matthew Boyle
5 (1)
Book Image

Domain-Driven Design with Golang

5 (1)
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)
1
Part 1: Introduction to Domain-Driven Design
6
Part 2: Real -World Domain-Driven Design with Golang

Revisiting the anti-corruption layer

We looked at the anti-corruption layer (also known as the adapter pattern) in Chapter 2. As a reminder, the adaptor pattern is useful for decoupling two different bounded contexts from each other, which helps separate concerns and ensure our systems can evolve independently and safely.

Let’s add an adaptor layer that satisfies the AvailabilityGetter interface.

Firstly, let’s make a new file called adapter.go:

Figure 6.4 – Creation of adapter.go

Firstly, let’s define a client struct and a New function:

type PartnershipAdaptor struct {
   client *http.Client
   url    string
}
func NewPartnerShipAdaptor(client *http.Client, url string) (*Client, error) {
   if client == nil {
      return nil, errors.New("client cannot be nil")
   }
   if url == &quot...