slangwald / book

A Book about Pythonic Application Architecture Patterns for Managing Complexity. Cosmos is the Opposite of Chaos you see. O'R. wouldn't actually let us call it "Cosmic Python" tho.

Book repo

Book	Code

Table of Contents

O'Reilly have generously said that we will be able to publish this book under a CC license, In the meantime, pull requests, typofixes, and more substantial feedback + suggestions are enthusiastically solicited.

Chapter
Preface
Introduction: Why do our designs go wrong?
Part 1 Intro
Chapter 1: Domain Model
Chapter 2: Repository
Chapter 3: Interlude: Abstractions
Chapter 4: Service Layer (and Flask API)
Chapter 5: TDD in High Gear and Low Gear
Chapter 6: Unit of Work
Chapter 7: Aggregates
Part 2 Intro
Chapter 8: Domain Events and a Simple Message Bus
Chapter 9: Going to Town on the MessageBus
Chapter 10: Commands
Chapter 11: External Events for Integration
Chapter 12: CQRS
Chapter 13: Dependency Injection
Epilogue: How do I get there from here?
Appendix A: Recap table
Appendix B: Project Structure
Appendix C: A major infrastructure change, made easy
Appendix D: Django
Appendix F: Validation

Below is just instructions for me and bob really.

Dependencies:

• asciidoctor
• Pygments (for syntax higlighting)
• asciidoctor-diagram (to render images from the text sources in ./images)

gem install asciidoctor
python2 -m pip install --user pygments
gem install pygments.rb
gem install asciidoctor-diagram

Commands

make html  # builds local .html versions of each chapter
make test  # does a sanity-check of the code listings