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Layered Architecture x RxSwift
Λ׆༻ͨ͠
దͳΤϥʔϋϯυϦϯά
@nonchalant0303
Զίϯ Vol.1 / Day. 1
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ࣗݾհ
• Takeshi Ihara
• Recruit Marketing Partners
• iOS Engineer
• Twitter: @nonchalant0303
• GitHub: Nonchalant
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OSS
https://github.com/Nonchalant/AppIcon
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Kyobashi.swift
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ΤϥʔϋϯυϦϯά
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ΤϥʔϋϯυϦϯά
ϓϩάϥϜͷॲཧதʹॲཧ͕͛ΒΕΔࣄ͕
ൃੜͨ͠ࡍɺͦͷॲཧΛΤϥʔͱͯ͠ରॲ͢Δ
ॲཧͷ͜ͱͰ͋Δɻྫ֎ॲཧͱݺΕΔɻ
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Α͋͘ΔΤϥʔ
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No content
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Xcode
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ͱΓ͋͑ͣ࠶ىಈ
͢Ε͍͍͔
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ͳͥ࠶ىಈ͠Α͏ͱߟ͑ͨͷ͔ʁ
աڈʹମݧͨ͜͠ͱ͕͋Δ
ͦͷࡍʹ࠶ىಈͨ͠Β࣏ͬͨͨΊ
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No content
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ϝʔϧΞυϨε͕
ؒҧ͍ͬͯΔʁ
ύεϫʔυ͕
ؒҧ͍ͬͯΔʁ
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ϝʔϧΞυϨε͕
ؒҧ͍ͬͯΔʁ
ύεϫʔυ͕
ؒҧ͍ͬͯΔʁ
αʔϏε
յΕͯΔʂ
αʔϏε
յΕͯΔʂ
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αʔϏεΕ
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Ϣʔβʔ༷ʑ
• ITϦςϥγʔ͕ߴ͍͔͍͔
• αʔϏεʹ׳Ε͠ΜͰ͍Δ͔Ͳ͏͔
• …
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No content
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࣍ʹ͖͢ߦಈ͕
͔Δ
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దͳΤϥʔ
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No content
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࣍ʹ͖͢ߦಈ͕
͔Βͳ͍
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ෆదͳΤϥʔ
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No content
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ϝʔϧΞυϨε͕
ؒҧ͍ͬͯΔʁ
ύεϫʔυ͕
ؒҧ͍ͬͯΔʁ
αʔϏε
յΕͯΔʂ
αʔϏε
յΕͯΔʂ
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࣍ʹ͖͢ߦಈ͕
͔Δ
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దͳΤϥʔ
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ΤϥʔϋϯυϦϯά
ൃੜͨ͠ΤϥʔʹԠͯ͡ɺϢʔβʔʹݱࡏͷঢ়
ଶΛࣔ͠ɺඞཁʹԠͯ࣍͡ͷߦಈΛࣔ͢͜ͱ
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ΤϥʔϋϯυϦϯά͍͠
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Τϥʔͷछྨ͕ଟ͍
• ωοτϫʔΫͷଓΤϥʔ
• ೖྗ߲ͷؒҧ͍ʹΑΔΤϥʔ
• λΠϜΞτʹΑΔΤϥʔ
• …
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1. ΤϥʔΛͻͨ͢Βચ͍ग़͢
ൈ͚࿙Εڐ༰͢Δ
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2. ΤϥʔΛྨ͢Δ
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2. ΤϥʔΛྨ͢Δ
Πϯϑϥܥ ϏδωεϩδοΫܥ
ωοτϫʔΫଓΤϥʔ ೖྗ߲ͷؒҧ͍ʹΑΔΤϥʔ
λΠϜΞτʹΑΔΤϥʔ ϢʔβʔͷݖݶΤϥʔ
ʜ ʜ
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Layered Architecture
*OGSBTUSVDUVSF
1SFTFOUBUJPO
%PNBJO
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Infrastructure
Πϯϑϥܥ
ωοτϫʔΫଓΤϥʔ
λΠϜΞτʹΑΔΤϥʔ
ʜ
enum InfrastructureError: Error {
case connection
case timeout
…
case unknown
}
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Domain
ϏδωεϩδοΫܥ
ೖྗ߲ͷؒҧ͍ʹΑΔΤϥʔ
ϢʔβʔͷݖݶΤϥʔ
ʜ
enum DomainError: Error {
case input
case permission
...
case unknown
}
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Layered Architectureͷݪଇ
ԼͷϨΠϠʔͷਓ্ͷϨΠϠʔ͕ެ։͍ͯ͠
ΔJOUFSGBDF͚ͩΛ͍ͬͯΔ
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ݪଇʹͯ͠ࢀরͰ͖Δ
*OGSBTUSVDUVSF
1SFTFOUBUJPO
%PNBJO
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Embedded Framework
*OGSBTUSVDUVSF
1SFTFOUBUJPO
%PNBJO
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[Pros] Embedded Framework
• Layerͷґଘ͕ؔ໌֬ʹͳΔ
• ࠩϏϧυ͕ಇ͖͘͢ͳΔ
• ෆඞཁͳϥΠϒϥϦ͕ࢀরͰ͖ͳ͘ͳΔ
• ModuleຖʹݴޠͷMigration͕Ͱ͖Δ
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ϨΠϠʔؒͷܨ͗ࠐΈ
*OGSBTUSVDUVSF
1SFTFOUBUJPO
%PNBJO
*OGSBTUSVDUVSF&SSPS
%PNBJO&SSPS
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InfrastructureErrorΛ
PresentationʹൖͰ͖ͳ͍
InfrastructureErrorΛ
DomainErrorʹม͢Δඞཁ͕͋Δ
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InfrastructureError →
DomainError
*OGSBTUSVDUVSF&SSPS %PNBJO&SSPS
DPOOFDUJPO DPOOFDUJPO
UJNFPVU
ʜ JOQVU
ʜ QFSNJTTJPO
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ϩάΠϯ
1. ϝʔϧΞυϨεͱύεϫʔυೖྗ
2. ϩάΠϯ͢Δ
3. Success or Failure
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• ྫ֎ΛUISPX͢Δ
• force-tryΛ༻͍ͳ͍ͱࢀর͢Δϝιου
ͯ͢ʹthrows͕ඞཁʹͳΔ
1. try-catch
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*OGSB
1SFTFOUBUJPO
%PNBJO
ϩάΠϯ
public protocol PublishRepository {
func login(email: String, password: String) throws -> User
}
public protocol LoginUseCase {
func login(email: String, password: String) throws
}
public protocol LoginPresenter {
func login(email: String, password: String) throws
}
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• ྫ֎Λ'BJMVSFઅʹ͢
• Switch-caseΛຖճॻ͘ඞཁ͕͋Δ
• มॲཧΛ͠ͳ͍߹ͰDBTFจ͕ඞཁʹͳ
Δ
2. Result
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*OGSB
1SFTFOUBUJPO
%PNBJO
ϩάΠϯ
public protocol PublishRepository {
func login(email: String, password: String) -> Result
}
public protocol LoginUseCase {
func login(email: String, password: String) -> Result
}
public protocol LoginPresenter {
func login(email: String, password: String) -> Result
}
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• ྫ֎ΛPO&SSPSઅʹ͢
• catchErrorઅͰΤϥʔϋϯυϦϯά͢Δ
• catchErrorઅ͕ͳ͍߹ͦͷ··ྫ֎͕
ԼྲྀʹྲྀΕΔ
3. RxSwift
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*OGSB
1SFTFOUBUJPO
%PNBJO
ϩάΠϯ
public protocol PublishRepository {
func login(email: String, password: String) -> Single
}
public protocol LoginUseCase {
func login(email: String, password: String) -> Completable
}
public protocol LoginPresenter {
func login(email: String, password: String) -> Completable
}
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*OGSBTUSVDUVSF&SSPS %PNBJO&SSPS 1SFTFOUBUJPO&SSPS
DPOOFDUJPO DPOOFDUJPO DPOOFDUJPO
QFSNJTTJPO QFSNJTTJPO
UFNQPSBSZ1BTTXPSE
&YQJSFE
UFNQPSBSZ1BTTXPSE
&YQJSFE
BQJ3FQPOTF SFTQPOTF SFTQPOTF
JOUFSOBMTFSWFSFSSPS VOLOPXO
VOLOPXO
USBOTMBUJPO
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struct PublishRepositoryImpl: PublishRepository {
func login(email: String, password: String) -> Single {
return apiClient.create(
with: PublishRequest(email: email, password: password)
)
}
}
Infrastructure
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struct LoginUseCaseImpl: LoginUseCase {
func login(email: String, password: String) -> Completable {
return repository.login(email: email, password: password)
.asObservable()
.catchError { error -> Observable in
return Observable.error(DomainError.create(with: error))
}
.flatMap { user -> Observable in
guard user.hasPermission else {
throw DomainError.permission
}
guard !user.isTemporaryPasswordExpired else {
throw DomainError.temporaryPasswordExpired
}
return Observable.empty()
}
.asCompletable()
}
}
Domain
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struct LoginPresenterImpl: LoginPresenter {
func login(email: String, password: String) -> Completable {
return useCase.login(email: email, password: password)
.catchError { error -> Completable in
return Completable.error(PresentationError.create(with: error))
}
}
}
Presentation
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֤ϨΠϠʔͰ
ΤϥʔϋϯυϦϯάΛߦ͏
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·ͱΊ
• ΤϥʔͷೝࣝΛἧ͑Δ͜ͱʹΑΓυΩϡϝ
ϯτԽͰ͖Δ
• Embedded FrameworkʹΑΓΤϥʔʹ
LayerͷࣝΛ༩Ͱ͖Δ
• Layerͷܨ͗ࠐΈ֤ϓϩμΫτʹ߹Θͤͨ
ํ๏Λ࠾༻͠·͠ΐ͏