Projecting events in Laravel (Laravel Live)

Transcript

1. Projecting events in Laravel
2. About me Freek Van der Herten Partner & developer at Spatie @freekmurze https://murze.be https://ohdear.app
3. Spatie Since 2003 Websites, applications and webshops Team 9 awesome human beings Specialisation Laravel, front-end development
4. Open Source 
 Software
5. We create a lot of it ± 200 packages on Packagist ± 2,000,000 downloads a month ± 25,000,000 total downloads All Postcardware!
6. Highlights Popular laravel-backup laravel-medialibrary laravel-permission New laravel-query-builder laravel-blade-x
7. https://spatie.be/open-source
8. https://spatie.be/open-source/postcards
9. Let's talk about projecting events
10. Talk overview Theory Laravel Event Projector demo
11. Theory
12. Traditional application Write data in database An update means overwriting the old data The old data cannot be accessed anymore
13. APPLICATION DATABASE TABLE value X
14. APPLICATION DATABASE TABLE value X value Y
15. Using projectors The application will fire off events Events will get written in a dedicated store Events are passed to classes that can handle them
16. APP EVENTS Event Event 1
17. APP EVENTS Event Event 1 Event 2
18. APP EVENTS Event Event 1 Event 2 Event 3
19. APP CONSUMER EVENTS PROJECTION Event Event 1 Event 2 Event 3
20. APP CONSUMER CONSUMER 2 EVENTS PROJECTION Event Event 1 Event 2 Event 3 ANOTHER PROJECTION
21. APP CONSUMER CONSUMER 2 EVENTS PROJECTION Event Event 1 Event 2 Event 3 ANOTHER PROJECTION
22. APP CONSUMER CONSUMER 2 EVENTS PROJECTION Event Event 1 Event 2 Event 3 Event 4 ANOTHER PROJECTION
23. Projecting events Auditing requirements Extra reports needed There is some setup required
24. Laravel 
 Event Projector
25. Laravel Event Projector It's not full event sourcing, it focuses on projections Beautifully integrated into Laravel Easy to get started with
26. https://docs.spatie.be/laravel-event-projector
27. Demo
28. In closing
29. Summary Easy to use package to get started with projections Hooks into Laravel's native events Replay capabilities Writes are harder, reads are easier
30. Resources https://kickstarter.engineering/event-sourcing-made-simple-4a2625113224 https://dev.to/barryosull/event-sourcing-what-it-is-and-why-its-awesome https://www.youtube.com/watch?v=28jmTeN3VYc https://github.com/eventsauce
31. Thank you! https://speakerdeck.com/freekmurze/projecting-events-in-laravel https://spatie.be/open-source https://murze.be https://ohdear.app https://fullstackeurope.com