Awesome Open Source
Awesome Open Source

E-Lesson (functional DDD showcase)

Build Status

Table of Contents

  1. Overview
  2. Event storming
  3. Contribute
  4. References


Used practices:
  • Domain-driven design
  • Pure functional programming
  • Behaviour-driven testing (BDD)
  • Event storming
  • Clean hexagonal architecture
Tech stack:
  • Kotlin with Spring Boot in production
  • Cucumber with Gherkin and ArchUnit in testing
The process:
  1. Big Picture event storming
  2. Design Level event storming
  3. Define ubiquitous language in code (types + workflows)
  4. Story definition in behaviour-driven way (specs)
  5. Implement domain logic to fulfill test specs
  6. GOTO step 3/4

Event storming

alt text

alt text


Please, feel free to contribute by creating a Pull Request from your own fork repository.

You may either:

  • choose an existing Issue to be implemented and assign yourself to it
  • create your own Issue concerning any enhancements or not yet implemented features
  • just submit a Pull Request if changes contain just refactoring of the existing code


  1. Domain Modeling Made Functional, Scott Wlaschin
  2. Implementing Domain-Driven Design, Vaughn Vernon
  3. Ports and Adapters Pattern (Hexagonal Architecture), Juan Manuel Garrido de Paz

Get A Weekly Email With Trending Projects For These Topics
No Spam. Unsubscribe easily at any time.
Kotlin (59,355
Functional Programming (3,049
Clean Architecture (1,755
Ddd (1,091
Cucumber (722
Bdd (682
Domain Driven Design (543
Hexagonal Architecture (266
Related Projects