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

Begin Event Sourcing with Lagom

Avatar for Ola Petersson Ola Petersson
October 23, 2017
Programming
2
190

Begin Event Sourcing with Lagom

Avatar for Ola Petersson

Ola Petersson

October 23, 2017
Tweet

More Decks by Ola Petersson

See All by Ola Petersson
NDC_Oslo__DevOps_in_Real_Life_-_A_How_To.pdf
Avatar for Ola Petersson olbpetersson
0
68
Co(ol)routines - Javaforum Q1
Avatar for Ola Petersson olbpetersson
0
130
Coolroutines - non-blocking Kotlin
Avatar for Ola Petersson olbpetersson
0
84
JWTB - Begin EventSourcing With Lagom
Avatar for Ola Petersson olbpetersson
0
110
Begin EventSourcing with Lagom - Javaforum Q4 2017
Avatar for Ola Petersson olbpetersson
0
79
JavaOne - Reactive Java EE
Avatar for Ola Petersson olbpetersson
0
150
JHipster - The best way to breed a new app
Avatar for Ola Petersson olbpetersson
0
820
Reactive Java EE
Avatar for Ola Petersson olbpetersson
0
350

Other Decks in Programming

See All in Programming
Claude Code on the Web を超える!? Codex Cloud の実践テク5選
Avatar for スナガク sunagaku
0
510
PHPライセンス変更の議論を通じて学ぶOSSライセンスの基礎
Avatar for Atsushi Matsuo matsuo_atsushi
0
140
Kotlinで実装するCPU/GPU 「協調的」パフォーマンス管理
Avatar for matuyuhi matuyuhi
0
380
予防に勝る防御なし（2025年版） - 堅牢なコードを導く様々な設計のヒント / Growing Reliable Code PHP Conference Fukuoka 2025
Avatar for Takuto Wada twada
PRO
36
11k
Web エンジニアが JavaScript で AI Agent を作る / JSConf JP 2025 sponsor session
Avatar for Masayuki Izumi izumin5210
3
1.1k
Amazon Bedrock Knowledge Bases Hands-on
Avatar for Kono konny0311
0
140
ボトムアップの生成AI活用を推進する社内AIエージェント開発
Avatar for aku11i aku11i
0
1.6k
オンデバイスAIとXcode
Avatar for リョウ ryodeveloper
0
470
Register is more than clipboard
Avatar for Satoru Kitaguchi satorunooshie
1
460
What's New in Web AI?
Avatar for Christian Liebel christianliebel
PRO
0
120
AIエージェントでのJava開発がはかどるMCPをAIを使って開発してみた / java mcp for jjug
Avatar for Naoki Kishida kishida
4
450
チーム開発の “地ならし"
Avatar for konifar konifar
6
3.9k

Featured

See All Featured
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
Avatar for Eileen M. Uchitelle eileencodes
26
3.2k
Six Lessons from altMBA
Avatar for Skipper Chong Warson skipperchong
29
4.1k
Bootstrapping a Software Product
Avatar for Garrett Dimon garrettdimon
PRO
307
110k
Fireside Chat
Avatar for paigeccino paigeccino
41
3.7k
JavaScript: Past, Present, and Future - NDC Porto 2020
Avatar for David Neal reverentgeek
52
5.7k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
Avatar for Chris Coyier chriscoyier
508
140k
Being A Developer After 40
Avatar for Adrian Kosmaczewski akosma
91
590k
Typedesign – Prime Four
Avatar for Hannes Fritz hannesfritz
42
2.9k
Sharpening the Axe: The Primacy of Toolmaking
Avatar for Bryan Cantrill bcantrill
46
2.6k
Making the Leap to Tech Lead
Avatar for Ryan Cromwell cromwellryan
135
9.6k
Designing for Performance
Avatar for Lara Hogan lara
610
69k
Become a Pro
Avatar for Speaker Deck speakerdeck
PRO
29
5.6k

Transcript

  1. EVENT SOURCING WITH LAGOM

  2. ME A few words about Ola Petersson @gotoOla [email protected] JUG

    Gothenburg (JavaForum Göteborg)

  3. ID.1 50

  4. ID.1 51

  5. ID.1 52

  6. None

  7. 50 + 1 + 1 = 52

  8. COMMANDS EVENTS aggregates

  9. COMMANDS EVENTS aggregates

  10. COMMANDS EVENTS aggregates

  11. CMD

  12. CMD EVENT

  13. CMD EVENT OLD

  14. CMD EVENT OLD NEW

  15. EVENT

  16. { food: [], drinks: [] } commands Events AGGREGATE

  17. { addBurger } { food: [], drinks: [] } commands

    Events AGGREGATE

  18. { addBurger } { food: [], drinks: [] } {

    burgerAdded } commands Events AGGREGATE

  19. { addBurger } { food: [burger], drinks: [] } {

    burgerAdded } commands Events AGGREGATE

  20. { addBurger } { food: [burger], drinks: [] } {

    addBeer } { burgerAdded } commands Events AGGREGATE

  21. { addBurger } { food: [burger], drinks: [] } {

    addBeer } { burgerAdded } { beerAdded } commands Events AGGREGATE

  22. { addBurger } { food: [burger], drinks: [beer] } {

    addBeer } { burgerAdded } { beerAdded } commands Events AGGREGATE

  23. { addBurger } { food: [burger], drinks: [beer] } {

    addSalad } { addBeer } { burgerAdded } { beerAdded } commands Events AGGREGATE

  24. { addBurger } { food: [burger], drinks: [beer] } {

    addSalad } { addBeer } { burgerAdded } { saladAdded } { beerAdded } commands Events AGGREGATE

  25. { addBurger } { food: [burger, salad ], drinks: [beer]

    } { addSalad } { addBeer } { burgerAdded } { saladAdded } { beerAdded } commands Events AGGREGATE

  26. { addBurger } { food: [burger, salad ], drinks: [beer,

    water] } { addSalad } { addBeer } { addWater } { burgerAdded } { saladAdded } { beerAdded } { waterAdded } commands Events AGGREGATE

  27. .

  28. None

  29. akka

  30. None

  31. CHANGE HISTORY AUDIT LOG SPEED TIME TRAVEL

  32. CHANGE HISTORY AUDIT LOG SPEED TIME TRAVEL

  33. CHANGE HISTORY AUDIT LOG SPEED TIME TRAVEL

  34. CHANGE HISTORY AUDIT LOG SPEED TIME TRAVEL

  35. event storming

  36. READ?

  37. CQRS WRITE READ

  38. EVENTUAL CONSISTENCY … a necessary evil

  39. MICROSERVICES

  40. QUESTIONS?