Cocoaheads Meetup / Kateryna Trofimenko / Feature development

Feature development: from feature flags to A/B

testing

Kateryna Trofimenko · Lead iOS developer1

2releas

14iOS

49countrie

About

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10QA

14iOS

release

About

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10QA

2releas

14iOS

2release

About

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10QA

2releas 47

languag

14iOS

49countrie

2release

327Musers

About

5

10QA

2releas

5+applicatio

47languag

14iOS

49countrie

2release

327Musers

About

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Feature service

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Feature Service

Feature Object

Feature Object

Feature Object

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Feature Service

Major feature

Remote dev feature

Feature Object

Feature Object

Feature Object

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Feature Service

Major feature

Remote dev feature

Dev feature

Feature Object

Feature Object

Feature Object

Feature objectclass BPFFeature : NSObject, NSCoding {

let key: String

var title: String?

var group: String?

let isOnByDefault: Bool

func isOn() -> Bool { ... }

func toggle() { ... }

}

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Feature service in debug

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Feature service

Server

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Feature service

Server

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Feature service

Server

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Feature service

Server

✦ Platform type

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Feature service

Server

✦ Platform type

✦ Product type …

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Feature service

Server

✦ Platform type

✦ Product type …

✦ Product requirements

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Feature service

Server

✦ Platform type

✦ Product type …

✦ Product requirements

✦ Client version

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Protocol evolution Change of the data format for existing feature

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Minor feature

✦ Informs server that client supports certain data format

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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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Chat redesign

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Chatto

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https://github.com/badoo/Chatto

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Git flow

dev

feature_1

release_1

integration_1

feature_2

masterintegration_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

Dev Feature… and chat redesign

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Dev featurefinal 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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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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Remote dev feature… and gradual release

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Remote dev feature

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Remote dev feature

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Remote dev feature

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A/B testingTopic Description

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A/B testing

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A/B testing

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A/B testing

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Overview

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✦ Major feature

Overview

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✦ Major feature

✦ Minor feature

Overview

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✦ Major feature

✦ Minor feature

✦ Development feature

Overview

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✦ Major feature

✦ Minor feature

✦ Development feature

✦ Remote Development feature

Overview

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✦ Major feature

✦ Minor feature

✦ Development feature

✦ Remote Development feature

✦ A/B testing

Overview

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[email protected]

https://www.linkedin.com/in/ekaterina-trofimenko-b7515128

Thank you!

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