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Domain-Driven Design Basics

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DDD Basics session with the Domain-Driven Design Belgium community. We only covered Strategic DDD, and split up the work amongst the five founders of the group: …

DDD Basics session with the Domain-Driven Design Belgium community. We only covered Strategic DDD, and split up the work amongst the five founders of the group:

@yreynhout (Defining Domain-Driven Design)

@JefClaes (Ubiquitous Language)

@ONE75 (Context Mapping)

@ToJans (Selling Domain-Driven Design to the business)

@mathiasverraes (Bounded Contexts and Modelling).

More at http://verraes.net/ or http://twitter.com/mathiasverraes

Published in: Technology, Business

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  • 1. DDD Basics February 11, 2014 - Olen, Belgium wifi: ITR-Events / domaindriven
  • 2. Kindly hosted by
  • 3. Community Talks Call for Proposals domaindriven.be/cfp
  • 4. Defining DDD (Yves) Ubiquitous Language (Jef) Bounded Contexts (Mathias) Context Mapping (Stijn) Modelling (Mathias) Starting/Selling DDD (Tom) Q&A / Lean Coffee
  • 5. Bounded Contexts
  • 6. Large complex systems: increased cognitive load
  • 7. Large complex systems: divergence in mental model
  • 8. Large complex systems: subtle nuances in meaning
  • 9. Avoid a big unified centralised model.
  • 10. Split into Bounded Contexts
  • 11. Benefits: clarity model integrity freedom to evolve separately
  • 12. Inspired by departments teams life cycles business processes …
  • 13. Make Bounded Context explicit pure independent consistent within its boundary
  • 14. Modelling
  • 15. Structural modelling Ontological
  • 16. Structural modelling inspired by persistence concerns
  • 17. Relational Normalised CRUD Anaemic
  • 18. Ask your Domain Expert about State Changes!
  • 19. Why does it change? When does it change? How often? Who causes it? By which rules? What consequences?
  • 20. ! ! The moving parts are more interesting than the stable parts
  • 21. ! ! A Domain Model is about:
  • 22. state + structure behaviour + change temporal roles + actors business rules + invariants causality + correlation interaction processes workflows + transitions intention + consequence failure …
  • 23. Modelling: Make the implicit explicit
  • 24. example ! Intentions: Command Objects Consequences: Domain Events
  • 25. @mathiasverraes http://verraes.net

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