Event Sourcing In Laravel

Transcript

1. Event Sourcing 
 in Laravel

2. About me Freek Van der Herten @freekmurze spatie.be freek.dev ohdear.app

   f l areapp.io

3. Open Source 
 Software

4. spatie.be/open-source

5. spatie.be/videos

6. Let's talk about event sourcing

7. Talk overview Theory Projectors demo Aggregates demo

8. Traditional application Write data in database An update means overwriting

   the old data The old data cannot be accessed anymore

9. APPLICATION DATABASE TABLE value X

10. APPLICATION DATABASE TABLE value X value Y

11. Event Sourced Application The application will f i re o

    f f events Events will get written in a dedicated store Events are passed to consumers that create projections Aggregate, Aggregate Root...

12. APP EVENTS Event Event 1

13. APP EVENTS Event Event 1 Event 2

14. APP EVENTS Event Event 1 Event 2 Event 3

15. APP CONSUMER EVENTS PROJECTION Event Event 1 Event 2 Event

    3

16. APP CONSUMER CONSUMER 2 EVENTS PROJECTION Event Event 1 Event

    2 Event 3 ANOTHER PROJECTION

17. APP CONSUMER CONSUMER 2 EVENTS PROJECTION Event Event 1 Event

    2 Event 3 ANOTHER PROJECTION

18. APP CONSUMER CONSUMER 2 EVENTS PROJECTION Event Event 1 Event

    2 Event 3 Event 4 ANOTHER PROJECTION

19. Event Sourced Application Auditing requirements Extra reports needed Recording the

    unhappy path There is some setup required

20. Laravel 
 Event Sourcing

21. Laravel Event Sourcing Package made by Spatie Aggregates, Projectors &

    Reactors Beautifully integrated into Laravel Easy to get started with

22. Demo

23. Aggregates

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30. Demo

31. Wrapping up

32. spatie.be/docs/laravel-event-sourcing

33. Packages spatie.be/docs/laravel-event-sourcing eventsauce.io

34. Event sourcing makes the easy things harder… …and the harder

    things easier — Frank De Jonge

35. Course eventsourcery.com

36. Larabank github.com/spatie/larabank-traditional github.com/spatie/larabank-event-projector github.com/spatie/larabank-event-projector-aggregates

37. One more thing

38. spatie.be/event-sourcing The basics of event sourcing Best practices Laravel speci

    f i c examples Event sourced cart ETA July 2021

39. Thank you! spatie.be/docs/laravel-event-sourcing spatie.be/products (only this week 25 % discount

    on everything) ohdear.app