Slides from my Euricom Spain 2013 talk on the ubiquitous language, with an example of refactoring from an anemic model to a more rich domain model.

1. Refactoring towards the
ubiquitous language
@JefClaes – jefclaes.be

2. What language?

3. When a customer
moves, we want to
send him an email.

4. UPDATE tbl_customer
SET street = …
WHERE id = …

6. It’s us, not them

7. We have forgotten how to talk
• Database
• Framework
• ORM
• Tools
• Code generation
• UI technology
• ...

15. = =

16. The ubiquitous language

17. Better understanding
of ‘the business’

18. Faster and less error-prone
communication

19. Less documentation!

20. Code can be understood
by everyone

21. Example
Our business has customers. A customer must
have a customer number, an address and an
email address. A customer can move to a new
address. When a customer moves, we want to
send them an email.

22. Can we tell this story in code?

23. Before

24. After

25. Before

26. Before

27. After

28. After

29. After

30. Work the language,
make the implicit explicit

32. Disclaimer
CRUD can be fine too.
Learn where the value is in your system.