Introduction to Domain Driven Design

Transcript

1. INTRODUCTION TO DESIGN- I (PREQUEL TO D3) KARTHIKKANNAN
2. “All software development is essentially a Modelling Exercise, knowingly or unknowingly.”
3. Our Perception
5. 1 2 3
7. Our Perception is pretty good after all
9. Solar System - I
10. Solar System - II
11. Solar System - III
12. What happened with each model?
13. Model <-> Reasoning
14. Why should we bother?
15. Let’s do some business
16. Cab Booking Model - I
17. Cab Booking Model - II Pooling Pooling
18. Cab Booking Model - III Adv Booking
19. Simple Hotel Booking - I
20. Simple Hotel Booking II Guest Level
21. RatePlan - I
22. RatePlan - II Meals, cabs…
23. Business is inherently Complicated & Unpredictable
24. Business business (n.) Old English bisignes (Northumbrian) "care, anxiety, occupation," from bisig "careful, anxious, busy, occupied, diligent" (see busy (adj.)) + -ness. Middle English sense of "state of being much occupied or engaged" (mid-14c.) is obsolete, replaced by busyness.
27. “All software development is essentially a Modelling Exercise, knowingly or unknowingly.”
28. Requirements Gathering
29. Elicit/Engineer the requirements
30. Better Requirements => Better Model Better Model => Better Requirements
31. Elements of a Model Representation Language
33. atom (n.) late 15c., as a hypothetical indivisible extremely minute body, the building block of the universe, from Latin atomus (especially in Lucretius) "indivisible particle," from Greek atomos "uncut, unhewn; indivisible," from a- "not" (see a- (3)) + tomos "a cutting," from temnein "to cut" (from PIE root *tem- "to cut").
35. Models - Generic Names Types (Verbs) Collaboration
36. Models - Object Models Classes Responsibilities Collaborators
37. Models - Relational Models Entities Responsibilities Relationships
38. Models - Domain Models Entities Responsibilities Relationships
39. Models - Domain Models Entities Aggregates Factories Repositories Domain Services Bounded Contexts
40. Next Steps
41. Next Steps
42. Questions
43. Thank you