Domain-Driven Design has attracted quite a lot of attention in recent years. This course explains the concepts of DDD, and explores how it can help us model complex software systems.
We'll lift the lid on key concepts such as Bounded Contexts, Aggregates and Ubiquitous Language, and take a pragmatic look at how to apply these concepts to address real challenges. The course also covers the Command-Query Responsibility Segregation (CQRS) pattern, and describes how it fits in with DDD. The course primarily addresses architecture and design challenges. We also dip down into code where appropriate, to illustrate key points and to make things tangible. Code examples are presented in Java (other languages can be catered for, on demand).
What you`ll learn:
• Understanding DDD concepts and terminology
• Effective model-driven design
• Bounded contexts and ubiquitous language
• Applying DDD in practice
• CQRS
• Implementation examples
Course outline:
Program day 1)
Introduction to Domain-Driven Design:
• What is Domain-Driven Design (DDD):
• What challenges does DDD address:
• Essential patterns and practices of DDD
Problem Domains:
• Understanding the problem domain:
• Techniques and practices:
• Core domains:
• Defining clean boundaries
Effective Model-Driven Design:
• Domain models:
• Defining a Ubiquitous Language:
• Domain model implementation patterns:
• Bounded Contexts:
• Applying DDD in practice
Bounded Context Integration:
• Integrating Bounded Contexts:
• Integrating distributed Bounded Contexts:
• Messaging: REST / RPC
Program day 2)
Overview of DDD Patterns:
• Entities, value objects, and domain services:
• Aggregates, factories, and repos:
• Domain events:
• Event sourcing
Value Objects and Entities:
• When to use a value object:
• Persistence options:
• How to implement entities:
• Entity best practices
Domain Services and Domain Events:
• When and how to use domain services:
• Domain services vs. application services:
• Domain service patterns:
• Domain event actions:
• Implementation options
Aggregates:
• The importance of aggregates in DDD:
• Defining aggregate boundaries:
• Implementing aggregates:
• Persistence
Program day 3)
Factories and Repositories:
• The purpose of factories:
• The purpose of repositories:
• Patterns and anti-patterns
Introduction to CQRS:
• What is CQRS:
• Eventual consistency:
• Commands and command buses:
• Repositories:
• Events and event buses
Going Further with CQRS:
• Implementing a REST UI:
• Event-sourced aggregates:
• Sagas
Audience:
Prerequisites:
• Architects, system designers, and developers
Language: English
Instructor: Andy Olsen
Andy is a freelance consultant and instructor based in the UK, working mostly in the City of London and Oxford. Andy has been working with .NET since the Beta 1 days and has extensive experience in many facets of .NET development including WCF, WPF, WF, ASP.NET MVC Web development, and mobile applications. Andy has designed and written many Microsoft Official Curriculum courses in the last decade, and has been engaged as author and technical reviewer with Apress on some of their biggest selling books.