Remix workshop

Dan introduces the Remix architecture, aimed at maximising reuse of components for apps that spin variations on a theme.

Many apps support multiple skins, but some need the ability to be remixed with entirely customised flows or combinations of features for different customers. It's difficult to do this well with a typical View Controller-centric architecture, but a combination of Coordinators and Clean architecture make this not just possible but pleasant and easy to test too.

Transcript

1. DAN CUTTING CUTTING.IO @DCUTTING
2. MARKETS, EXPERIMENTS, IPAD, TESTS ➜ ARCHITECTURE! MOTIVATION
3. DEMO
4. KISS YAGNI MVC
5. MVC PickGameView PickNumberView PlayGameView
6. CODE
8. MVC ▸ Flow logic everywhere ▸ Low cohesion MVC PickGameView PickNumberView PlayGameView
9. IDEATE THIS COORDINATORS
10. Coordinators GameCoordinator PickGameView PickNumberView PlayGameView
11. CODE
12. COORDINATORS ▸ Flow logic in one place (high cohesion) ▸ Flows have names ▸ (More) reusable views Coordinators GameCoordinator PickGameView PickNumberView PlayGameView
13. KIDS LIKE IPADS? CLEAN
14. SPELLD OUT PRIME 7 7 is prime
15. @daniel.cutting Robert C. Martin https://8thlight.com/blog/uncle-bob/2012/08/13/the-clean-architecture.html
16. Clean GameCoordinator PickGameView PickNumberView PlayGameView GameInteractor PlayGameFormatter
17. CODE
18. Tim-bezhashvyly https://commons.wikimedia.org/wiki/File:Robert_Cecil_Martin.png
19. Clean GameCoordinator GameInteractor PickGameView PickNumberView PlayGameFormatter PlayGameView
20. CODE
21. SPELLD OUT PRIME 7 7 is prime
22. DEMO
23. CLEAN Clean GameCoordinator GameInteractor PickGameView PickNumberView PlayGameFormatter PlayGameView ▸ Reusable business logic ▸ Reusable presentation logic ▸ Coordinators just
 keep flow logic ▸ New flow ➜
 new coordinator
25. UGH, REALLY? AUTOMATED TESTS
26. DEMO
27. AUTOMATED TESTS ▸ Decouple UIKit ▸ Test everything except thin UIKit layer ▸ Blazing fast ▸ Unit, flow & acceptance tests
 without a simulator!
28. JUST RE-MOTE IT FEATURES
29. Clean GameCoordinator GameInteractor PickGameView PickNumberView PlayGameFormatter PlayGameView
30. Feature Coordinator Interactors... Formatters... Views...
31. Feature Coordinator Features... Interactors... Formatters... Views...
32. App Feature Feature Feature Feature Feature Feature Feature
33. Features GameCoordinator PickFeature PickCoordinator PickInteractor PickGameView PickNumberView LocalPlayInteractor PlayGameFormatter PlayGameView
34. Features RemoteGameCoordinator PickFeature RemotePlayInteractor RemoteGameFormatter RemoteGameView
35. FEATURES Features GameCoordinator PickFeature PickCoordinator PickInteractor PickGameView PickNumberView LocalPlayInteractor PlayGameFormatter PlayGameView ▸ Reusable flows ▸ Coordinators have delegates just like views
36. REMIX OUR EXPERIENCES ▸ Separate flow, business, presentation logic
 ➜ loose coupling, high cohesion
 ➜ readable, maintainable, composable ▸ Easy, fast tests ▸ But: dependency injection! ▸ And: the more you share, the more you (have to) care
37. ARCHITECTURE CAN.. BE.. GRADUAL. BE OK WITH INCONSIST3NCY “
38. DAN CUTTING CUTTING.IO @DCUTTING GITHUB.COM/DCUTTING/REMIX LOGO BY STRANGEMANSTANDING