Ruby loves DDD

•

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The Rubyday 2013 presentation about Domain Driven Design implementation in Ruby. Source code is available here https://github.com/emadb/ruby_loves_ddd

Tecnologia

Customer Customer
Id
Name
ShippingAddress
Id
Name
ShipOrder(...)
VatCode
BillingAddress

‣Fully OOP (...for real)
‣Expressiveness
‣Metaprogramming
‣DSL with ease
‣Gems...tons of gems
‣Great community

UI
DOMAIN MODEL/BUSINESS LAYER
DATA LAYER/ORM
DATABASE
APPLICATION LAYER

UI
COMMANDS/HANDLERS
DATA LAYER
DATABASE
DOMAIN MODEL

UI
COMMANDS/HANDLERS
DATA LAYER
WRITE DB
DOMAIN MODEL
READ DB
HANDLER

ADD ITEM
ADD ITEM
REMOVE ITEM
APPLY COUPON

ADD ITEM
ADD ITEM
REMOVE ITEM
APPLY COUPON
SET SHIPPING ADDRESS

ADD ITEM
ADD ITEM
REMOVE ITEM
APPLY COUPON
SET SHIPPING ADDRESS
COMPLETE ORDER

‣ Don’t store the state but the
deltas
‣ The state can be rebuilt from
events
‣ Simple storing structures
‣ Snapshot could be helpful
EVENTSOURCING

SOURCECODE
https://github.com/emadb/ruby_loves_ddd

SPECIAL THANKS TO @BITTSTATIC @SANDROPAGANOTTI @AMELCHIORI

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Ruby loves DDD

1. RUBY♥DDD @EMADB was DDD IN RUBY

4. HI,I’M EMANUELE @EMADB

5. DDDIS ABOUT...

6. ANALYSIS

7. DESIGN

8. PATTERNS

10. UBIQUITOUS LANGUAGE

11.

12. BOUNDED CONTEXT

13. Customer Customer Id Name ShippingAddress Id Name ShipOrder(...) VatCode BillingAddress

14.

15. ENTITYAND VALUE OBJECT

16. Customer Address

17. AGGREGATE

18.

19.

20. REPOSITORYAND SERVICE

21.

22. DOMAIN EVENT

23. RUBY

24. ‣Fully OOP (...for real) ‣Expressiveness ‣Metaprogramming ‣DSL with ease ‣Gems...tons of gems ‣Great community

25. CODE

26. WE CAN DO MORE

27. UI DOMAIN MODEL/BUSINESS LAYER DATA LAYER/ORM DATABASE APPLICATION LAYER

28. READ vs WRITE

29. STOP THINKINGIN CRUD

30. CQRS

31. UI COMMANDS/HANDLERS DATA LAYER DATABASE DOMAIN MODEL

32. UI COMMANDS/HANDLERS DATA LAYER WRITE DB DOMAIN MODEL READ DB HANDLER

33. EVENT SOURCING

34. STATE vs TRANSITIONS

35. ADD ITEM

36. ADD ITEM ADD ITEM

37. ADD ITEM ADD ITEM REMOVE ITEM

38. ADD ITEM ADD ITEM REMOVE ITEM APPLY COUPON

39. ADD ITEM ADD ITEM REMOVE ITEM APPLY COUPON SET SHIPPING ADDRESS

40. ADD ITEM ADD ITEM REMOVE ITEM APPLY COUPON SET SHIPPING ADDRESS COMPLETE ORDER

41. ‣ Don’t store the state but the deltas ‣ The state can be rebuilt from events ‣ Simple storing structures ‣ Snapshot could be helpful EVENTSOURCING

42. THISRESOLVE THEEPIC CUSTOMER REQUEST

43. IWANTIT FOR YESTERDAY

44.

45. CODE

46. REFERENCES

47.

48.

49. SOURCECODE https://github.com/emadb/ruby_loves_ddd

50. SPECIAL THANKS TO @BITTSTATIC @SANDROPAGANOTTI @AMELCHIORI