Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Technically DDD

Avatar for pelshoff pelshoff
July 06, 2017
Programming
1
150

Technically DDD

Avatar for pelshoff

pelshoff

July 06, 2017
Tweet

More Decks by pelshoff

See All by pelshoff
Push your side effects to the edge
Avatar for pelshoff pelshoff
0
110
Testing Absolute Units
Avatar for pelshoff pelshoff
0
94
Confidently Insured
Avatar for pelshoff pelshoff
0
200
Final Class Aggregate
Avatar for pelshoff pelshoff
0
260
Technically DDD v10
Avatar for pelshoff pelshoff
0
160
From Conversation to Software v3
Avatar for pelshoff pelshoff
0
130
TDD, DDD & Teamwork v2
Avatar for pelshoff pelshoff
0
210
Technically DDD C# v10
Avatar for pelshoff pelshoff
1
270
A Practical Introduction to Domain Driven Design
Avatar for pelshoff pelshoff
4
300

Other Decks in Programming

See All in Programming
なるべく楽してバックエンドに型をつけたい！(楽とは言ってない)
Avatar for HIBIKI CUBE hibiki_cube
0
140
AI時代のキャリアプラン「技術の引力」からの脱出と「問い」へのいざない / tech-gravity
Avatar for MinoDriven minodriven
21
7.1k
Package Management Learnings from Homebrew
Avatar for Mike McQuaid mikemcquaid
0
210
16年目のピクシブ百科事典を支える最新の技術基盤 / The Modern Tech Stack Powering Pixiv Encyclopedia in its 16th Year
Avatar for ahu ahuglajbclajep
5
1k
OSSとなったswift-buildで Xcodeのビルドを差し替えられるため 自分でXcodeを直せる時代になっている ダイアモンド問題編
Avatar for yimajo yimajo
3
610
インターン生でもAuth0で 認証基盤刷新が出来るのか
Avatar for takumi taku271
0
190
AIによる開発の民主化を支える コンテキスト管理のこれまでとこれから
Avatar for Mulyu mulyu
3
190
フルサイクルエンジニアリングをAI Agentで全自動化したい 〜構想と現在地〜
Avatar for Kaito Minatoya kamina_zzz
0
400
AIエージェントのキホンから学ぶ「エージェンティックコーディング」実践入門
Avatar for Masahiro Nishimi masahiro_nishimi
5
410
MDN Web Docs に日本語翻訳でコントリビュート
Avatar for uutan1108 ohmori_yusuke
0
650
CSC307 Lecture 02
Avatar for Javier Gonzalez-Sanchez javiergs
PRO
1
780
「ブロックテーマでは再現できない」は本当か？
Avatar for Takashi Kitajima inc2734
0
940

Featured

See All Featured
RailsConf 2023
Avatar for Aaron Patterson tenderlove
30
1.3k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
Avatar for Eileen M. Uchitelle eileencodes
38
2.7k
Building a Scalable Design System with Sketch
Avatar for Laura Van Doore lauravandoore
463
34k
Product Roadmaps are Hard
Avatar for C. Todd Lombardo iamctodd
PRO
55
12k
Making Projects Easy
Avatar for Brett Harned brettharned
120
6.6k
Tell your own story through comics
Avatar for letsgokoyo letsgokoyo
1
810
From π to Pie charts
Avatar for Rasagy Sharma rasagy
0
120
New Earth Scene 8
Avatar for Sydney Stone popppiees
1
1.5k
Fashionably flexible responsive web design (full day workshop)
Avatar for Andy Clarke malarkey
408
66k
Navigating Algorithm Shifts & AI Overviews - #SMXNext
Avatar for Aleyda Solis aleyda
0
1.1k
StorybookのUI Testing Handbookを読んだ
Avatar for Shingo Yamazaki zakiyama
31
6.6k
Ten Tips & Tricks for a 🌱 transition
Avatar for Manu Carrasco Molina stuffmc
0
65

Transcript

  1. None

  2. Technically DDD DDDDeventer, 2017-07-06 19:45:00.000000

  3. Pim Elshoff developer.procurios.com @pelshoff

  4. None
  5. None

  6. Questions?

  7. None

  8. Context

  9. Value objects

  10. None
  11. None

  12. Value objects • Express a value • Business rules here

    • Immutable • Easy to unit test

  13. Entities

  14. None

  15. Entities • Have identity • More than the sum of

    their attributes • Evolve over time • If there really really really is no VO possible, then business rules here • Slightly harder to test

  16. Services

  17. None

  18. Services • No identity or attributes (Not a “thing”) •

    Cross-concern operations • Business rules that need more data than any single entity knows • Harder to test

  19. Aggregates

  20. None

  21. Aggregates • Collection of objects • Interaction through root •

    If there really really really is no VO possible, then business rules here • Harder to test

  22. Repositories

  23. Repositories • Collection of all objects of a type

  24. final class Address

  25. final class BicycleService

  26. final class StreetAddress

  27. final class Investment

  28. None
  29. None

  30. Meetings cannot end before they start

  31. None
  32. None
  33. None
  34. None
  35. None

  36. Program slots cannot occur in the same room at the

    same time
  37. None
  38. None
  39. None
  40. None
  41. None
  42. None
  43. None
  44. None

  45. Program slots must occur within the duration of the meeting

  46. None

  47. Pim Elshoff developer.procurios.com @pelshoff