Faking Real Time: Optimistic Updates & Eventual Consistency (Decompress 2015)

A talk I gave at Decompress 2015 about making CSSConf Racer, a real time, multiplayer racing game: http://cssconfracer.com

CSSConf Racer was built with Flux, Firebase, React & react-router.

Transcript

1. Faking Real Time
   Optimistic Updates & Eventual Consistency
   

   View Slide

2. View Slide

3. View Slide

4. View Slide

5. View Slide

6. View Slide

7. View Slide

8. View Slide

9. View Slide

10. cssconfracer.com
    

    View Slide

11. cssconfracer.com
    

    View Slide

12. View Slide

13. View Slide

14. View Slide

15. setUsername(“jim”)
    

    View Slide

16. {
    type: SET_USERNAME,
    username: “jim”
    }
    

    View Slide

17. UserStore: CHANGE event triggered
    

    View Slide

18. View Slide

19. View Slide

20. Real time on the internet is hard.
    

    View Slide

21. View Slide

22. View Slide

23. View Slide

24. You don’t always need confirmation
    before updating the UI
    

    View Slide

25. View Slide

26. View Slide

27. View Slide

28. View Slide

29. Eventual Consistency
    

    View Slide

30. View Slide

31. CQRS
    Command Query Responsibility Segregation
    

    View Slide

32. View Slide

33. View Slide

34. View Slide

35. View Slide

36. View Slide

37. How to fake real time
    Hide network effects from the user
    Optimistically update the UI
    Embrace eventual consistency
    

    View Slide

38. The First Annual Decompress Grand Prix
    Go to cssconfracer.com now
    

    View Slide

39. Thanks!
    @bensmithett
    https://github.com/bensmithett/cssconfracer
    Screen by iconoci http://thenounproject.com/term/screen/82256/
    Database by Stefan Parnarov http://thenounproject.com/term/database/29365/
    Phone by Joris Hoogendoorn http://thenounproject.com/term/phone/42970/
    Cloud by Jan-Christoph Borchardt http://thenounproject.com/term/cloud/932/
    CQRS by Martin Fowler http://martinfowler.com/bliki/CQRS.html
    http://cssconfracer.com
    

    View Slide