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Begin Event Sourcing with Lagom

Ola Petersson
October 23, 2017
Programming
2
170

Begin Event Sourcing with Lagom

Ola Petersson

October 23, 2017
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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?