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

Exposing our service via an open host service

We have a requirement that our service must also expose an API. This is so other microservices or user interfaces may call us to get a recommendation. One method we could use to do this is to generate an API using OpenAPI or gRPC, as we discussed in Chapter 2. However, for completeness, we are going to write this one from scratch.

Let’s define a contract first. We are going to create an API that receives the following request:

/recommendation?location=$country?from=$date&to=$date&budget =$budget

It returns the following response:

{
    "hotelName": "hotel Name",
    "totalCost": {
    "cost": 300,
    "currency": "USD"
    }
}

Notice how the response we intend to return is different from the partnership system? This is completely normal. We own our domain...