Overview
Want to master Domain-Driven Design through practical examples? This by-example guide teaches DDD through annotated code and diagram examples organized by complexity level.
What Is DDD By-Example Learning?
DDD by-example learning is a pattern-first approach where you learn through practical implementations of DDD concepts rather than narrative explanations. Each example shows:
- Domain modeling - How to model complex business domains
- Tactical patterns - Entities, value objects, aggregates, repositories, services
- Strategic patterns - Bounded contexts, context mapping, domain events
- Working code - Runnable examples showing DDD in practice
This approach is ideal for developers and architects who want to apply DDD principles to real-world software systems.
Learning Path
The DDD by-example tutorial guides you through examples organized into three progressive levels, from basic building blocks to complex strategic patterns.
Coverage Philosophy
This by-example guide provides practical coverage of DDD through annotated examples. The focus is on applying DDD patterns, not just understanding theory.
What’s Covered
- Building blocks - Entities, value objects, aggregates, domain events
- Tactical patterns - Repositories, factories, services, domain events
- Strategic patterns - Bounded contexts, context maps, anti-corruption layers
- Domain modeling - Ubiquitous language, aggregates design, event storming
- Integration patterns - Shared kernel, customer-supplier, conformist
What’s NOT Covered
- Deep DDD philosophy (see by-concept tutorials for conceptual understanding)
- Framework-specific implementations (examples use language-agnostic patterns)
- Event sourcing and CQRS advanced patterns (separate tutorials)
Prerequisites
- Object-oriented programming experience
- Understanding of software design patterns
- Experience with business domain modeling
Structure of Each Example
Every example follows a consistent format:
- Brief Explanation: What DDD concept the example demonstrates
- Domain Context: Business scenario being modeled
- Code/Diagram: Implementation showing the pattern
- Design Decisions: Why this approach was chosen
- Key Takeaway: The core DDD principle to retain
This structure provides context, implementation, and understanding all in one place.