Я расскажу о том, что такое feature flags, как они нам в Badoo помогают разрабатывать большие фичи итерационно, силами нескольких разработчиков, и не переживать из-за кода, уходящего в релизы.   И вы узнаете о том, как система таргетированной раскладки фич переросла в систему a/b-тестирования и как все это выглядит со стороны iOS-клиента

1. Feature development:
from feature flags to A/B
testing
Kateryna Trofimenko · Lead iOS developer
1

2. 2
releas
14
iOS
49
countrie
About
2

3. 10
QA
14
iOS
release
About
3

4. 10
QA
2
releas
14
iOS
2
release
About
4

5. 10
QA
2
releas
47
languag
14
iOS
49
countrie
2
release
327M
users
About
5

6. 10
QA
2
releas
5+
applicatio
47
languag
14
iOS
49
countrie
2
release
327M
users
About
6

7. 7

8. Feature service
8

9. 9
Feature Service
Feature Object
Feature Object
Feature Object

10. 10
Feature Service
Major feature
Remote dev feature
Feature Object
Feature Object
Feature Object

11. 11
Feature Service
Major feature
Remote dev feature
Dev feature
Feature Object
Feature Object
Feature Object

12. Feature object
class BPFFeature : NSObject, NSCoding {
let key: String
var title: String?
var group: String?
let isOnByDefault: Bool
func isOn() -> Bool { ... }
func toggle() { ... }
}
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13. Feature service in debug
13

14. Feature service
Server
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15. Feature service
Server
15

16. Feature service
Server
16

17. Feature service
Server
✦ Platform type
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18. Feature service
Server
✦ Platform type
✦ Product type …
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19. Feature service
Server
✦ Platform type
✦ Product type …
✦ Product requirements
19

20. Feature service
Server
✦ Platform type
✦ Product type …
✦ Product requirements
✦ Client version
20

21. Protocol evolution
Change of the data format for existing feature
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22. 22

23. 23

24. Minor feature
✦ Informs server that client supports certain data format
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25. Minor feature
✦ Informs server that client supports certain data format
✦ Removes client version dependency on the server
✦ Easy to QA old and new version of the client
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26. Chat redesign
26

27. Chatto
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https://github.com/badoo/Chatto

28. 28
Git flow
dev
feature_1
release_1
integration_1
feature_2
master
integration_2
Release branch
Pending release
On Live
In Progress
In Review
In QA
In dev
In integration
In master
autodeveloper qa time
2-3 days
1 week

29. Dev Feature
… and chat redesign
29

30. Dev feature
final class ChattoFeature: NSObject, BPFFeatureSource {
class func feature() -> BPFFeature {
let feature = BPFFeature(title: "Chat V2",
group: "Chat",
key: self.featureKey())
feature.isOnByDefault = false
return feature
}
class func featureKey() -> String {
return "com.badoo.chat.chatto"
}
class var enabled: Bool {
return BPFGlobals.shared().features().isFeatureEnabled(featureKey:
self.featureKey())
}
}
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31. Dev feature
- (void)configureFeatures {
id<BPFFeaturesService> featureService = [self features];
[featureService loadFeatures:[self classBasedFeatures] withRuntimeSearch:NO];
}
- (NSArray *)classBasedFeatures {
NSArray *classes = @[ ...., [ChattoFeature class],....];
NSMutableArray *classBasedFeatures = [NSMutableArray array];
for (Class class in classes) {
NSAssert([class conformsToProtocol:@protocol(BPFFeatureSource)], @"Class %@
should conform to BPFFeatureSource protocol", NSStringFromClass(class));
BPFFeature *feature = [(id<BPFFeatureSource>)class feature];
[classBasedFeatures addObject:feature];
}
return [classBasedFeatures copy];
}
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32. 32

33. Remote dev feature
… and gradual release
33

34. Remote dev feature
34

35. Remote dev feature
35

36. Remote dev feature
36

37. A/B testing
Topic Description
37

38. A/B testing
38

39. A/B testing
39

40. A/B testing
40

41. Overview
41

42. ✦ Major feature
Overview
42

43. ✦ Major feature
✦ Minor feature
Overview
43

44. ✦ Major feature
✦ Minor feature
✦ Development feature
Overview
44

45. ✦ Major feature
✦ Minor feature
✦ Development feature
✦ Remote Development feature
Overview
45

46. ✦ Major feature
✦ Minor feature
✦ Development feature
✦ Remote Development feature
✦ A/B testing
Overview
46

47. kateryna.trofimenko@corp.badoo.com
https://www.linkedin.com/in/ekaterina-trofimenko-b7515128
Thank you!
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