Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
레거시 프로젝트에서 의존성 주입하기
Search
Suyeol Jeon
December 05, 2019
Programming
2.6k
1
Share
레거시 프로젝트에서 의존성 주입하기
왜 개념만 알려주고 적용 방법은 아무도 알려주지 않는가
Suyeol Jeon
December 05, 2019
More Decks by Suyeol Jeon
See All by Suyeol Jeon
성장하는 iOS 개발자 되기
devxoul
2
250
Let's TDD
devxoul
0
100
Hello, ReactorKit 👋
devxoul
0
110
Build Funnels with Google BigQuery
devxoul
0
56
RxSwift 시작하기
devxoul
1
370
ReactorKit으로 단방향 반응형 앱 만들기
devxoul
0
180
Swift - 혼자 공부하면 분명히 안할테니까 같이 공부하기
devxoul
10
3.3k
좋은 디자이너, 나쁜 프로젝트매니저, 이상한 개발자
devxoul
0
130
Other Decks in Programming
See All in Programming
Agent Skills を社内で育てる仕組み作り
jackchuka
1
2.4k
開発とはなにか、Essenceカーネルで見えるもの
ukin0k0
0
210
AI 時代のソフトウェア設計の学び方
masuda220
PRO
9
1.8k
ふつうのFeature Flag実践入門
irof
1
190
AI駆動開発で崩れていくコードベースを立て直す
kyoko_nr_nr
1
360
自動レビューエンジンの実装と運用 ~レビューのない世界へ~
kurukuru1999
2
250
UaaL×Androidアプリのメモリ計測 — Memory Profilerの先へ
rio432
0
170
1人1案件のプロダクトエンジニア時代に、"プロセス監督"としてチャレンジしたこと
non0113
0
310
Inside Stream API
skrb
1
100
GitHub Copilot CLIのいいところ
htkym
2
1k
Swiftのレキシカルスコープ管理
kntkymt
0
190
要はバランスからの卒業 #yumemi_grow
kajitack
0
190
Featured
See All Featured
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
mongodb
49
9.9k
Public Speaking Without Barfing On Your Shoes - THAT 2023
reverentgeek
1
400
Scaling GitHub
holman
464
140k
16th Malabo Montpellier Forum Presentation
akademiya2063
PRO
0
130
SEOcharity - Dark patterns in SEO and UX: How to avoid them and build a more ethical web
sarafernandez
0
190
JAMstack: Web Apps at Ludicrous Speed - All Things Open 2022
reverentgeek
1
450
Product Roadmaps are Hard
iamctodd
PRO
55
12k
Amusing Abliteration
ianozsvald
1
180
Put a Button on it: Removing Barriers to Going Fast.
kastner
60
4.3k
Producing Creativity
orderedlist
PRO
348
40k
ラッコキーワード サービス紹介資料
rakko
1
3.4M
Mozcon NYC 2025: Stop Losing SEO Traffic
samtorres
0
240
Transcript
ۨѢद ۽ંীࢲ ઓࢿ ੑೞӝ ࣻৌ
ۨѢद ۽ંীࢲ ઓࢿ ੑೞӝ ࣻৌ ࠗઁ: ৵ ѐ֛݅ ঌ۰Ҋ ਊ
ߑߨ ইޖب ঌ۰ ঋחо
పझח য۵
పझח য۵ పझೞӝ જѱ ৈ ঋ
పझח য۵ పझೞӝ જѱ ৈ ঋ Coupling ъೞ
func fetchUser() -> Single<User> { }
func fetchUser() -> Single<User> { return Networking.shared.get("/user/1") }
✅ పझ ాҗ func fetchUser() -> Single<User> { return Networking.shared.get("/user/1")
}
✅ పझ ాҗ ⛔ పझ पಁ func fetchUser() -> Single<User>
{ return Networking.shared.get("/user/1") }
func fetchUser() -> Single<User> { return Networking.shared.get("/user/1") } ✅ పझ
ాҗ ⛔ పझ पಁ
func fetchUser() -> Single<User> { return Networking.shared.get("/user/1") } ✅ పझ
ాҗ ⛔ పझ पಁ
func fetchUser() -> Single<User> { return Networking.shared.get("/user/1") } ъೠ ઓ
func fetchUser() -> Single<User> { return Networking.shared.get("/user/1") } ъೠ ઓ
ডೠ ઓ
func fetchUser() -> Single<User> { return Networking.shared.get("/user/1") } ъೠ ઓ
ডೠ ઓ Networking Production
func fetchUser() -> Single<User> { return Networking.shared.get("/user/1") } ъೠ ઓ
ডೠ ઓ Networking NetworkingStub Production Testing
func fetchUser() -> Single<User> { return self.networking.get("/user/1") } ъೠ ઓ
ডೠ ઓ Networking NetworkingStub Production Testing
func fetchUser() -> Single<User> { return self.networking.get("/user/1") } UserService(networking: Networking())
func fetchUser() -> Single<User> { return self.networking.get("/user/1") } UserService(networking: Networking())
UserService(networking: NetworkingStub())
UserService(networking: Networking()) UserService(networking: NetworkingStub())
UserService(networking: Networking()) UserService(networking: NetworkingStub()) ب ফ֎ܳ য٣ࢲ ࢤࢿ೧ਃ?
Composition Root
Composition Root ઓࢿ Ӓېо ٜ݅যח Ҕ
Composition Root ઓࢿ Ӓېо ٜ݅যח Ҕ ۽Ӓ۔ ੑ
Composition Root ઓࢿ Ӓېо ٜ݅যח Ҕ ۽Ӓ۔ ੑ (=AppDelegate)
User Repo List Repo Detail
User Repo List Repo Detail
User Repo List Repo Detail UserService RepoService
User Repo List Repo Detail UserService RepoService Networking Networking
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module Composition
Root ীࢲ ࢤࢿ
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module AppDependency
struct AppDependency { let window: UIWindow } CompositionRoot
struct AppDependency { let window: UIWindow } extension AppDependency {
} CompositionRoot
struct AppDependency { let window: UIWindow } extension AppDependency {
static func resolve() -> AppDependency { } } CompositionRoot
struct AppDependency { let window: UIWindow } extension AppDependency {
static func resolve() -> AppDependency { return AppDependency( ) } } CompositionRoot
struct AppDependency { let window: UIWindow } extension AppDependency {
static func resolve() -> AppDependency { return AppDependency( window: ... ) } } CompositionRoot
struct AppDependency { let window: UIWindow } extension AppDependency {
} CompositionRoot static func resolve() -> AppDependency { return AppDependency( window: ... ) }
let window = UIWindow() return AppDependency( window: window )
let window = UIWindow() window.rootViewController = ... return AppDependency( window:
window )
let networking = Networking() let window = UIWindow() window.rootViewController =
ListVC( userService: UserService( networking: networking ), detailVCFactory: { DetailVC( repoService: RepoService( networking: networking ) ) } ) return AppDependency( window: window )
let networking = Networking() let window = UIWindow() window.rootViewController =
ListVC( userService: UserService( networking: networking ), detailVCFactory: { DetailVC( repoService: RepoService( networking: networking ) ) } ) return AppDependency( window: window )
let networking = Networking() let window = UIWindow() window.rootViewController =
ListVC( userService: UserService( networking: networking ), detailVCFactory: { DetailVC( repoService: RepoService( networking: networking ) ) } ) return AppDependency( window: window )
let networking = Networking() let window = UIWindow() window.rootViewController =
ListVC( userService: UserService( networking: networking ), detailVCFactory: { DetailVC( repoService: RepoService( networking: networking ) ) } ) return AppDependency( window: window )
let networking = Networking() let window = UIWindow() window.rootViewController =
ListVC( userService: UserService( networking: networking ), detailVCFactory: { DetailVC( repoService: RepoService( networking: networking ) ) } ) return AppDependency( window: window )
let networking = Networking() let window = UIWindow() window.rootViewController =
ListVC( userService: UserService( networking: networking ), detailVCFactory: { DetailVC( repoService: RepoService( networking: networking ) ) } ) return AppDependency( window: window )
let networking = Networking() let window = UIWindow() window.rootViewController =
ListVC( userService: UserService( networking: networking ), detailVCFactory: { DetailVC( repoService: RepoService( networking: networking ) ) } ) return AppDependency( window: window )
let networking = Networking() let window = UIWindow() window.rootViewController =
ListVC( userService: UserService( networking: networking ), detailVCFactory: { DetailVC( repoService: RepoService( networking: networking ) ) } ) return AppDependency( window: window )
AppDelegate AppDependency
class AppDelegate { var window: UIWindow? func application( _ application:
UIApplication, didFinishLaunchingWithOptions ... ) -> Bool { self.window = UIWindow(...) self.window?.makeKeyAndVisible() return true } }
class AppDelegate { let dependency: AppDependency var window: UIWindow? func
application( _ application: UIApplication, didFinishLaunchingWithOptions ... ) -> Bool { self.window = UIWindow(...) self.window?.makeKeyAndVisible() return true } }
class AppDelegate { let dependency: AppDependency var window: UIWindow? private
override init() { } func application( _ application: UIApplication, didFinishLaunchingWithOptions ... ) -> Bool { self.window = UIWindow(...) self.window?.makeKeyAndVisible() return true } }
class AppDelegate { let dependency: AppDependency var window: UIWindow? private
override init() { self.dependency = AppDependency.resolve() } func application( _ application: UIApplication, didFinishLaunchingWithOptions ... ) -> Bool { self.window = UIWindow(...) self.window?.makeKeyAndVisible() return true } }
class AppDelegate { let dependency: AppDependency var window: UIWindow? private
override init() { self.dependency = AppDependency.resolve() } func application( _ application: UIApplication, didFinishLaunchingWithOptions ... ) -> Bool { self.window = self.dependency.window self.window?.makeKeyAndVisible() return true } }
Composition Rootо పझ ജ҃ীࢲ प೯غ ঋب۾
Composition Rootо పझ ജ҃ীࢲ प೯غ ঋب۾ UIApplicationMain( CommandLine.argc, CommandLine.unsafeArgv, NSStringFromClass(UIApplication.self),
NSStringFromClass(NSClassFromString("MyTests.TestAppDelegate") ?? AppDelegate.self) )
Composition Rootо పझ ജ҃ীࢲ प೯غ ঋب۾ UIApplicationMain( CommandLine.argc, CommandLine.unsafeArgv, NSStringFromClass(UIApplication.self),
NSStringFromClass(NSClassFromString("MyTests.TestAppDelegate") ?? AppDelegate.self) ) https://github.com/devxoul/Pure
Composition Rootח పझ ജ҃ীࢲ प೯غݶ উػ
Composition Rootח పझ ജ҃ীࢲ प೯غݶ উػ ࢤࢿ ഐ ৻ ٘ח
ઁ
ۿ જ݅ അप ޙઁ
ۿ જ݅ അप ޙઁ ઓࢿ Ӓېী ࣘೞ ޅೠ
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module
ઓࢿ Ӓېী ࣘೞ ޅೠ
ઓࢿ Ӓېী ࣘೞ ޅೠ. ৵?
ઓࢿ Ӓېী ࣘೞ ޅೠ. ৵? 1. ੋఠಕझী ઓೠ
ઓࢿ Ӓېী ࣘೞ ޅೠ. ৵? 1. ੋఠಕझী ઓೠ UserService.shared.fetchUser()
ઓࢿ Ӓېী ࣘೞ ޅೠ. ৵? 1. ੋఠಕझী ઓೠ 2.
ੋझఢझܳ ࢤࢿೠ UserService.shared.fetchUser()
ઓࢿ Ӓېী ࣘೞ ޅೠ. ৵? 1. ੋఠಕझী ઓೠ 2.
ੋझఢझܳ ࢤࢿೠ let detailVC = DetailVC() UserService.shared.fetchUser()
ೞաঀ ೧Ѿ೧ ࠇद.
Ҿӓ ݾ
Ҿӓ ݾ ݽٚ ېझо ઓࢿ Ӓېী ࣘೞѱ ػ
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module
Ҿӓ ݾ ݽٚ ېझо ઓࢿ Ӓېী ࣘೞѱ ػ അप ݾ
Ҿӓ ݾ ݽٚ ېझо ઓࢿ Ӓېী ࣘೞѱ ػ അप ݾ
যઁࠁ ؊ ա ٘ܳ ࢿೠ
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module যઁ
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module য়ט
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module ղੌ
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module ղੌ+1
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module ղੌ+2
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module ղੌ+3
1. ੋఠಕझী ઓೠ 2. ੋझఢझܳ ࢤࢿೠ let detailVC
= DetailVC() UserService.shared.fetchUser() ઓࢿ Ӓېী ࣘೞ ޅೠ. ৵?
1. ੋఠಕझী ઓೠ UserService.shared.fetchUser()
1. ੋఠಕझী ઓೠ ࢤࢿ۽ ׳߉ח UserService.shared.fetchUser()
1. ੋఠಕझী ઓೠ ࢤࢿ۽ ׳߉ח UserService.shared.fetchUser() init(userService: UserService)
1. ੋఠಕझী ઓೠ ࢤࢿ۽ ׳߉ח UserService.shared.fetchUser() init(userService: UserService) self.userService.fetchUser()
۽షਃ? рചחਃ??
അप ݾ যઁࠁ ؊ ա ٘ܳ ࢿೠ
അप ݾ যઁࠁ ؊ ա ٘ܳ ࢿೠ যب ৻ࠗীࢲ ੑೡ
ࣻ ѱ غ
അप ݾ যઁࠁ ؊ ա ٘ܳ ࢿೠ যب ৻ࠗীࢲ ੑೡ
ࣻ ѱ غ ਃ೧ ٸ ۽షਸ ٜ݅
1.1 ੋఠಕझী बпೞѱ ઓೠ UserService.shared.fetchUser()
1.1 ੋఠಕझী बпೞѱ ઓೠ UserService.shared.fetchUser()
1.1 ੋఠಕझী बпೞѱ ઓೠ UserService.fetchUser()
1.1 ੋఠಕझী बпೞѱ ઓೠ ࢤࢿ۽ ఋੑਸ ׳߉ח UserService.fetchUser()
1.1 ੋఠಕझী बпೞѱ ઓೠ ࢤࢿ۽ ఋੑਸ ׳߉ח UserService.fetchUser() init(userServiceType:
UserService.Type)
1.1 ੋఠಕझী बпೞѱ ઓೠ ࢤࢿ۽ ఋੑਸ ׳߉ח UserService.fetchUser() init(userServiceType:
UserService.Type) self.userServiceType.fetchUser()
2. ੋझఢझܳ ࢤࢿೠ let detailVC = DetailVC()
2. ੋझఢझܳ ࢤࢿೠ let detailVC = DetailVC() ࢤࢿ۽ ಂషܻܳ
׳߉ח
2. ੋझఢझܳ ࢤࢿೠ let detailVC = DetailVC() ࢤࢿ۽ ಂషܻܳ
׳߉ח init(detailVCFactory: () -> DetailVC)
2. ੋझఢझܳ ࢤࢿೠ let detailVC = DetailVC() ࢤࢿ۽ ಂషܻܳ
׳߉ח init(detailVCFactory: () -> DetailVC) let detailVC = self.detailVCFactory()
ࠂೠ ۽о դޖೞ ঋਸөਃ??
അप ݾ যઁࠁ ؊ ա ٘ܳ ࢿೠ
അप ݾ যઁࠁ ؊ ա ٘ܳ ࢿೠ যب ৻ࠗীࢲ ੑೡ
ࣻ ѱ غ
അप ݾ যઁࠁ ؊ ա ٘ܳ ࢿೠ যب ৻ࠗীࢲ ੑೡ
ࣻ ѱ غ ࠂ೧ݶ Factory ఋੑਸ ೞ
ف ೧Ѿ ߑߨ ҕా
ف ೧Ѿ ߑߨ ҕా ઓࢿ ৻ࠗী ਤೠ. init(userService: UserService) init(detailVCFactory:
() -> DetailVC)
ف ೧Ѿ ߑߨ ҕా ઓࢿ ৻ࠗী ਤೠ. ਃী ٮۄ ਗೞח
ѐܳ ੑೡ ࣻ . ListVC(detailVCFactory: { DetailVCMock() }) UserVC(userService: UserServiceMock())
ઁ ઓࢿ Ӓېী ࣘೞѱ ٜ݅
ઁ ઓࢿ Ӓېী ࣘೞѱ ٜ݅ Rootীࢲ оө ࣽࢲ۽
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module য়ט
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module ղੌ
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module ղੌ+1
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module ղੌ+2
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module ղੌ+3
window.rootViewController = ListVC( ) য়ט
window.rootViewController = ListVC( userService: UserService( ) ) ղੌ
window.rootViewController = ListVC( userService: UserService( networking: networking ) ) ղੌ+1
window.rootViewController = ListVC( userService: UserService( networking: networking ), detailVCFactory: {
DetailVC( ) } ) ղੌ+2
window.rootViewController = ListVC( userService: UserService( networking: networking ), detailVCFactory: {
DetailVC( repoService: RepoService( ) ) } ) ղੌ+3
window.rootViewController = ListVC( userService: UserService( networking: networking ), detailVCFactory: {
DetailVC( repoService: RepoService( networking: networking ) ) } ) ղੌ+4
AppDelegate UIWindow ListVC DetailVC UserService RepoService Networking Module Module
పझ ജ҃ীࢲ AppDelegateо प೯ظਃ DetailVCী ۄఠܳ ֈӝҊ रযਃ ಂషܻ ۽о
ցޖ ࠂ೧ઉਃ
Pure https://github.com/devxoul/Pure