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The Example

About the Book

In 2009 I have had the pleasure of spending a 2 day course and many geek beers with Greg Young talking about Domain-Driven Design specifically focussed on Command Query Responsibility Segregation (CQRS).

The example project I created based on these discussions was very well received by the community and regarded a good reference project to explain and learn the patterns that make up CQRS. I decided to add the different blog posts I wrote about the example into a single book so it is easy to find and read.

You can find some reviews on Amazon and of course the Kindle version and a paperback version. The source code that the book walks you through is written in C# and can be found on Github.

About the Author

Mark Nijhof
Mark Nijhof

Mark has worked in the software industry since 2000 during this time he has had many different roles, from Developer, Customer Support, Team Lead till Agile Coach. He currently works as a programmer working with erlang and javascript.

Table of Contents

  • Miscellaneous
    • About
    • The cover
  • CQRS à la Greg Young
    • Queries (reporting)
    • Commands (executing behavior on the domain)
    • Command Handler
    • Internal Events (capturing intent)
    • Domain Behavior
    • Domain Event
    • Internal Domain Event Handler
    • The Domain Repository
    • Domain Repository Contract
    • Data Mining
    • External Events (publishing, letting others know)
    • Eventual Consistency
    • Specifications
    • Some other benefits
    • Finally
  • Domain Events
    • Using domain events for state change
    • Getting the state changes
    • Loading historical domain events
    • The base class
    • Aggregate entities
    • Finally
  • Domain State
  • Event Sourcing
  • Event Versioning
  • Scalability
  • Specifications
    • Black box
    • The BaseTestFixture
    • The BaseTestFixture<TSubjectUnderTest>
    • The PresenterTestFixture<TPresenter>
    • CQRS and Event Sourcing
    • Where is Should?
    • Finally
  • Using conventions with Passive View
    • Passive View
    • The View
    • The Presenter
    • The Magic
    • Reflection
    • The Specifications
  • The Ubiquitous Language is not Ubiquitous
  • Convention over Configuration
    • Configure your Conventions
    • Not just for framework code
  • Trying to make it re-usable
    • Convention over Configuration
    • Why have everything protected?
    • Reflect only once
    • Conventional limits
    • Current state
    • Finally
  • Links
    • Examples

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