Domain-Driven Design with Golang: Use Golang to create simple, maintainable systems to solve complex business problems

Length: 204 pages
Edition: 1
Language: English
Publisher: Packt Publishing
Publication Date: 2022-12-16
ISBN-10: 1804613452
ISBN-13: 9781804613450
Sales Rank: #695863 (See Top 100 Books)

Understand the concept of Domain-driven design and build two DDD systems from scratch that can be showcased as part of your portfolio

Key Features

Explore Domain-driven design as a timeless concept and learn how to apply it with Go
Build a domain-driven monolithic application and a microservice from scratch
Leverage patterns to make systems scalable, resilient, and maintainable

Book Description

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.

What you will learn

Get to grips with domains and the evolution of Domain-driven design
Work with stakeholders to manage complex business needs
Gain a clear understanding of bounded context, services, and value objects
Get up and running with aggregates, factories, repositories, and services
Find out how to apply DDD to monolithic applications and microservices
Discover how to implement DDD patterns on distributed systems
Understand how Test-driven development and Behavior-driven development can work with DDD

Who this book is for

This book is for intermediate-level Go developers who are looking to ensure that they not only write maintainable code, but also deliver great business value. If you have a basic understanding of Go and are interested in learning about Domain-driven design, or you’ve explored Domain-driven design before but never in the context of Go, then this book will be helpful.

Cover
Title Page
Copyright and credits
Contributors
About the reviewers
Table of Contents
Preface
Part 1: Introduction to Domain-Driven Design
Chapter 1: A Brief History of Domain-Driven Design
	The world before DDD
		So, what are OOD patterns?
	Eric Evans and DDD
	Three pillars of DDD
	Adoption of DDD
	When should you use DDD?
	Summary
	Further reading
Chapter 2: Understanding Domains, Ubiquitous Language, and Bounded Contexts
	Technical requirements
	Setting the scene
	Domains and sub-domains
	Ubiquitous language
		Benefits of ubiquitous language
	Bounded contexts
		Open Host Service
		Published language
		Anti-corruption layer
	Summary
	Further reading
Chapter 3: Entities, Value Objects, and Aggregates
	Technical requirements
	Working with entities
		Generating good identifiers
		A warning when defining entities
		A note on object-relational mapping
	Working with value objects
		How should I decide whether to use an entity or value object?
	The aggregate pattern
		Discovering aggregates
		Designing aggregates
		Aggregates beyond a single bounded context
	Summary
	Further reading
Chapter 4: Exploring Factories, Repositories, and Services
	Technical requirements
	Introducing the factory pattern
		Entity factories
	Implementing the repository pattern in Golang
	Understanding services
		Domain services
		Application services
	Summary
Part 2: Real -World Domain-Driven Design with Golang
Chapter 5: Applying Domain-Driven Design to a Monolithic Application
	Technical requirements
	What do we mean when we say monolithic application?
	Setting the scene
	Getting started with our CoffeeCo system
		Implementing our product repository
		Adding an infrastructure service for payment handling
		Paying with CoffeeBux
		Adding store-specific discounts
		Extending our service
	Summary
	Further reading
Chapter 6: Building a Microservice Using DDD
	Technical requirements
	A friendly warning (again)
	What do we mean by microservices?
		What are the benefits of microservices?
		What are the downsides of microservices?
	Should my company adopt microservices?
	Setting the scene (again)
	Building a recommendation system
	Revisiting the anti-corruption layer
	Exposing our service via an open host service
	Summary
Chapter 7: DDD for Distributed Systems
	Technical requirements
	What is a distributed system?
		CAP theorem and databases
	Distributed system patterns
		CQRS
		EDA
	Dealing with failure
		Two-phase commit (2PC)
		The saga pattern
	What is a message bus?
		Kafka
		RabbitMQ
		NATS
	Summary
	Further reading
Chapter 8: TDD, BDD, and DDD
	Technical requirements
	TDD
		Adding a test
		Run the test we just wrote – it should fail (and we should expect it to)
		Write as little code as possible to pass the test
		Refactoring
	BDD
	Summary
Index
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