Android Engineering for Scale

Droidcon London 2014 & Droidcon NYC 2015

Transcript

2. Android Engineering for Scale Jamie McDonald
3. What is scale? In the context of mobile development title, date, 01 of 10
4. Subtitle 4M Android downloads / month 175M monthly listeners title, date, 01 of 10
5. title, date, 01 of 10
6. title, date, 01 of 10 Codebase
7. Ball of Mud title, date, 01 of 10
8. Layered Architecture title, date, 01 of 10
9. Featurised Architecture title, date, 01 of 10
10. Layers
11. Feature Packages
12. Feature Packages STREAM StreamAdapter StreamFragment StreamModule StreamOperations StreamStorage StreamItemPresenter
13. Lava Layers title, date, 01 of 10 “Successive, well intentioned, changes to architecture throughout the lifetime of an project can lead to a fragmented and hard-to- maintain code base” The Lava Layer Anti-pattern
14. SPOCCER Screen Presenter Operations Controller Command EntityState Repository
15. Subtitle Reactive Programming title, date, 01 of 10 Rx
16. Branches title, date, 01 of 10 <<new component>> branch <<old component>> master <<old component>> origin/master
17. master Branch by Abstraction title, date, 01 of 10 abstraction layer <<new component>> <<old component>> Martin Fowler: Branch by Abstraction
18. master Branch by Abstraction title, date, 01 of 10 abstraction layer <<new component>> Martin Fowler: Branch by Abstraction
19. master Branch by Abstraction title, date, 01 of 10 <<new component>> Martin Fowler: Branch by Abstraction
20. master Trunk-based Development title, date, 01 of 10 feature-B .isEnabled() .isEnabled() feature-A .isEnabled() feature-C Trunk-based Development
21. if (flags.isEnabled(Feature.BRAND_NEW_FEATURE)) { return newThing; } else { return oldThing; } title, date, 01 of 10 Feature Flags
22. Modules title, date, 01 of 10 MAIN REPO SINGLE REPO ANDROID-KIT PROPELLER LIGHTCYCLE SKIPPY PLAYER
23. Users title, date, 01 of 10
24. Subtitle End-to-End Development title, date, 01 of 10
25. Android iOS SoundCloud API
26. API Mobile Mobile API Android iOS
27. Subtitle title, date, 01 of 10 { "id":612849, "kind":"user", "permalink":"bazan", "username":"David Bazan", "uri":"https://api.soundcloud.com/users/612849", "permalink_url":"http://soundcloud.com/bazan", "avatar_url":"https://i1.sndcdn.com/avatars-000030728315- oe5uld-large.jpg?e76cf77", "country":"United States", "first_name":"David", "last_name":"Bazan", "full_name":"David Bazan", "description":"Known for his work fronting the enigmatic rock band Pedro the Lion, David Bazan\u2019s emotionally charged narratives, eye for telling detail, and mournful voice have more in common with J.D. Salinger\u2019s \u201cNine Stories\u201d or Flannery O\u2019Connor\u2019s \u201cWise Blood\u201d than with the usual lyrical slant of popular music. Bazan is a gifted storyteller, weaving parables of spiritual conflict, suburban ennui, and personal surrender into magnetic, well-crafted songs.\r\n\r\nHis debut solo full-length album, Curse Your Branches (out now on Barsuk), is a masterwork by a modern American poet at the height of his powers. Paste Magazine called him one of the \u201c100 Best Living Songwriters\u201d. This record is the deepest and most explicit exploration of his struggles with faith and a meditation on all things passed between the generations.", "city":"Seattle", [...] } { "collection":[ "hip hop", "chill", "electronic", "deep house", "party", "love", "rap", "happy", "study", "techno", "indie rock", "dubstep", "r&b", "relax", "country", "pop", "edm", "reggae", "house", "workout", "soundtrack", "reggaeton", "piano", "dance", "remix", "alternative", "summer", "instrumental", "rock", "morning", "funk", "classical", [...] } SoundCloud API Mobile API
28. Staying Connected
29. Team title, date, 01 of 10
30. Mobile Team Other Engineering Android iOS Platform Teams
31. Feature Teams Core Engineering Android iOS
32. Core Engineering Android iOS Feature Teams
33. title, date, 01 of 10
34. title, date, 01 of 10
35. Enabling Involvement
36. Subtitle Collective Values title, date, 01 of 10
37. title, date, 01 of 10 Pairing & Pull Requests
38. title, date, 01 of 10 ACCEPTANCE TEST UNIT TEST CODE
39. Subtitle title, date, 01 of 10 @Inject @LightCycle ActionBarUtil actionBarUtil; @Inject @LightCycle PlayerController playerController; public MainActivity() { [...] } Unit Testing
40. title, date, 01 of 10 Acceptance Testing
41. Release Train title, date, 01 of 10 BETA 257 258 259 258-beta 259-beta RELEASE
42. title, date, 01 of 10 UNIT TESTS BUILD PROMOTE ACCEPTANCE TESTS Continuous Integration
43. title, date, 01 of 10 Featurised, layered architecture Shared practices: reactive programming Feature teams & end-to-end development Shared values: testing Trunk-based development Summary
44. soundcloud.com/jobs Thank you, NYC!