Practical Domain-Driven Design in Go
Practical Domain-Driven Design in Go
About the Book
Learn how to build Go applications that honor your core logic and stay easy to understand and maintain. Practical Domain-Driven Design in Go uses a online store as an example to on how to structure your code around clear domain models and rules.
This book explains how to:
- Create a isolated domain layer that captures your core business logic
- Build an infrastructure layer that supports domain with HTTP, async messaging and databases
- Use practical testing strategies to keep you productive
- Handle everyday challenges like transactions, filters, and validations in a simple way
Because the book is a work in progress, your feedback will help shape its final form. Chapters and paragraphs are constantly rewritten. Table of content changes. There still might be TODO lines inside pages of the book. Send feedback to book at benetis.me
About the Author
Table of Contents
- 1 Before you begin
- 1.1 Source code
- 1.2 Domain-Driven design by Eric Evans
- 1.3 Differences from usual DDD
- 1.4 Legend
- 2 About this book
- 2.1 Intended Audience
- 2.2 Prerequisites
- 2.3 What You Will Learn
- 2.4 Purpose and Approach
- 3 Introduction to Domain-Driven Design
- 3.1 What is Domain-Driven Design?
- 3.2 Key Aspects
- 3.3 When to DDD?
- 3.3.1 Benefits
- 3.3.2 Challenges in securing organizational buy-in
- 4 Introduction to case study
- 4.1 Business requirements
- 4.1.1 Na\"ive approach
- 4.1.2 First iteration
- 4.1 Business requirements
- 5 Layers: Business Domain Layer
- 5.1 Domain models
- 5.1.1 Product examples
- 5.1.2 Clarify meaning of ''model'' in codebase
- 5.1.3 Models in Online Store 1.0
- 5.2 Domain services
- 5.2.1 Implementation example
- 5.1 Domain models
- 6 (empty) Aggregates, Entities, Value Objects
- 7 Invariants
- 7.1 Introduction
- 7.3 Add products to cart example
- 7.4 Type System
- 8 Entity IDs
- 8.1 Human-Readable UUIDs
- 8.2 TypeID
- 8.3 Performance considerations
- 9 Layers: Infrastructure layer
- 9.1 Communications: HTTP
- 9.1.1 Code generation
- 9.1.2 Handler implementation
- 9.1.3 Transforming domain layer structures to infrastructure layer
- 9.2 Repositories
- 9.2.1 Inferfaces
- 9.2.2 Mapping aggregates to tables
- 9.2.3 Transactions
- 9.3 External and internal clients
- 9.1 Communications: HTTP
- 10 Layers: Application and Shared layers
- 10.1 Application layer
- 10.2 Shared layer
- 10.3 Summary
- 11 (work-in-progress) Testing: Overview and Examples
- 11.1 Testing with actual implementations
- 11.2 Testing library: goconvey
- 11.3 Domain tests: testing inventory service
- 11.5 Tooling: Taming complexity due bi-directional layer dependencies in tests
- 12 (work-in-progress) Between layers: Errors, Filters, Validations
- 12.1 Error handling
- 12.2 Filtering
- 12.3 Ordering
- 12.4 Validations
- 12.4.1 Input validation
- 12.4.2 Model validation
- 13 (empty) Bounded Contexts and Context Mapping
- 14 (empty) Domain Events and Services
- 15 Durable execution
- 15.1 Motivation and overview
- 15.2 Temporal in Go
- 15.3 Payments integration workflow
- 15.4 (work-in-progress) Integrating into DDD codebase
- 16 (empty) Bonus chapters
- 16.1 Interactors
- 16.2 In-Memory repositories for testing
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