LINE Androidアプリの基盤を支える OSSライブラリLich / Kotlin Lich

Transcript

1. -*/&גࣜձࣾ
   -*/&ίϛϡχέʔγϣϯϓϥοτϑΥʔϜ։ൃࣨ
   େੴক๜ -*/&
   "OESPJEΞϓϦͷج൫Λࢧ͑Δ
   044ϥΠϒϥϦ-JDI

2. "CPVU
   NF w -*/&ίϛϡχέʔγϣϯϓϥοτϑΥʔϜ։ൃࣨॴଐ
   w -*/&ΞϓϦͷج൫෦෼ͷ։ൃΛ୲౰
   w -*/&
   %&7
   %":
   
   
   
   ʹ΋ొஃ
   w ݸਓϒϩάͰ͸࠷ۙ"QQMF
   .ͷ࿩͕όζͬͨ

3. -*/&ΞϓϦͷ՝୊ w ೥͍ۙྺ࢙͕͋Γɺ͍ΘΏΔʮٕज़తෛ࠴ʯ͕ଟ͍
   w ίʔυͷෳࡶ౓͕ߴ͘ɺमਖ਼΍৽ػೳ௥Ճʹ͔͔Δίετ͕େ͖͍
   w Ϗϧυʹ͕͔͔࣌ؒΔ
   w 41%:ϓϩτίϧͷ࠾༻ͳͲͷಠࣗͷ࡞ΓࠐΈ͕ɺ࠷ۙͷ։ൃ؀ڥͷมԽ "OESPJE
   04΍J04ͷΞοϓσʔτɺ։ൃݴޠ΍ϥΠϒϥϦͷมԽͳͲ

   ʹ ରԠͰ͖͍ͯͳ͍

4. -*/5ϓϩδΣΫτͷ্ཱͪ͛ w -*/5
   -*/&
   *NQSPWFNFOU
   GPS
   /FYU
   5FO
   ZFBST
   w -*/&ΞϓϦͷج൫Λվળ͢ΔͨΊɺΫϥΠΞϯτଆɾαʔόʔଆ૒ํ͕ ڠྗͯ͠ࠓޙ೥Λݟਾ͑ͨվળΛߦ͏
   w ओͱͯ͠ωοτϫʔΫϓϩτίϧ΍σʔλಉظ·ΘΓͷվળ
   

   w ৄࡉ͸
   -*/&
   %&7
   %":
   ͷηογϣϯʹͯ
   w IUUQTMJOFEFWEBZMJOFDPSQDPNKQTFTTJPOT"

5. -*/5ϓϩδΣΫτͷ੒Ռͷ044Խ w -*/5ϓϩδΣΫτͷ੒Ռ͸-*/&ΞϓϦҎ֎ʹ΋ల։͍͖͍ͯͨ͠
   w -JCSBSZ
   NPEVMFͱͯ͠ଞͷΞϓϦ΍4%,͔Β΋࢖༻͠΍͘͢͢Δ
   w ൚༻తͳػೳ͸044ͱͯࣾ͠֎ʹ΋ެ։͢Δ
   w ֎෦͔ΒͷϑΟʔυόοΫ͕ड͚ΒΕΕ͹࣭ΛΑΓߴΊΒΕΔ
   w

   -JDI
   IUUQTHJUIVCDPNMJOFMJDI

6. -JDI w "OESPJEΞϓϦ޲͚ͷ
   MJCSBSZ
   DPMMFDUJPO
   w ݱ࣌఺Ͱ͸
   lDPNQPOFOUz
   lWJFXNPEFMz
   lMJGFDZDMFz
   lPLIUUQz
   lUISJGUz
   ͷ ͭͷϥΠϒϥϦ͕͋Δ
   

   w ͦΕͧΕͷϥΠϒϥϦ͸ಠཱ͍ͯ͠ΔͷͰඞཁͳ΋ͷ͚ͩར༻Մೳ
   w ຊ೔͸
   l-JDI
   DPNQPOFOUz
   ʹ͍ͭͯ঺հ IUUQTHJUIVCDPNMJOFMJDI

7. -JDI
   $PNQPOFOU w 4JOHMFUPOΦϒδΣΫτͷ؅ཧΛ͢ΔͨΊͷϥΠϒϥϦ
   w %BHHFS
   ,PJO
   ͱ͍ͬͨ%*πʔϧͷ୅ΘΓͱͳΔ΋ͷ
   w طଘͷ%*πʔϧΛஔ͖׵͑ͣʹิ׬తʹར༻͢Δ͜ͱ΋ग़དྷΔ

8. -JDI
   $PNQPOFOUͷಛ௃ w ࢖༻͢ΔͨΊʹ֮͑Δ͜ͱ͕গͳ͍
   w (MPCBMͳঢ়ଶΛ࣋ͨͣɺ"QQMJDBUJPOPO$SFBUF ͳͲͰͷॳظԽ͕ෆཁ
   w MB[Z͕,PUMJOͷEFMFHBUFE
   QSPQFSUZͱͯ͠ॻ͚Δ
   w JOUFSGBDFͱ࣮૷Λ؆୯ʹ෼཭Ͱ͖Δ
   

   w -JCSBSZ
   NPEVMF΍%ZOBNJD
   GFBUVSF
   NPEVMFͰ΋໰୊ͳ͘ಈ͘
   w #VJME
   UZQF΍qBWPSʹΑΔ࣮૷ͷ੾Γସ͕͑؆୯ʹͰ͖Δ
   w 6OJU
   UFTUͰϞοΫΦϒδΣΫτʹࠩ͠ସ͑Δͷ΋؆୯
   w ίʔυੜ੒Λ͠ͳ͍ͷͰϏϧυ͕࣌ؒԆͼͳ͍

9. جຊతͳ࢖͍ํ
    w $PNQPOFOUΛఆٛ͢Δ class FooComponent { // snip... companion

   object : ComponentFactory<FooComponent>() { override fun createComponent(context: Context): FooComponent = FooComponent() } }

10. جຊతͳ࢖͍ํ
     w 'PP$PNQPOFOUͷΠϯελϯεΛऔಘ
    w 'PP$PNQPOFOUͷΠϯελϯεΛMB[Zʹऔಘ
    w 'SBHNFOUͰͷ࢖༻ྫ val fooComponent

    = context.getComponent(FooComponent) val fooComponent by context.component(FooComponent) class FooFragment : Fragment() { private val fooComponent by component(FooComponent) // snip... }

11. JOUFSGBDFͱ࣮૷ͷ෼཭ w ࢖͏ଆ͔Β͸'PP$PNQPOFOUΠϯλʔϑΣʔε͚͕ͩݟ͑Ε͹Α͍
    w 'PP$PNQPOFOU*NQM͸೚ҙͷϞδϡʔϧʹஔ͚Δ interface FooComponent { // snip...

    companion object : ComponentFactory<FooComponent>() { override fun createComponent(context: Context): FooComponent = delegateToServiceLoader(context) } } @AutoService(FooComponent::class) class FooComponentImpl : FooComponent { // snip... }

12. ෳ਺ͷ࣮૷ΫϥεΛ੾Γସ͑Δ EFCVHϏϧυͰ͸
    %FCVH'PP$PNQPOFOU*NQM
    
    ͦΕҎ֎Ͱ͸
    'PP$PNQPOFOU*NQM
    ͕༻͍ΒΕΔ // path: src/debug/java/DebugFooComponentImpl.kt @AutoService(FooComponent::class) class DebugFooComponentImpl :

    FooComponent, ServiceLoaderComponent { override val loadPriority: Int get() = 10 // snip... } // path: src/main/java/FooComponentImpl.kt @AutoService(FooComponent::class) class FooComponentImpl : FooComponent, ServiceLoaderComponent { override val loadPriority: Int get() = 0 // snip... }

13. ࣮ߦ࣌ͷίετʹ͍ͭͯ w JOUFSGBDFͱ࣮૷Λ෼཭͢Δػೳ͸+BWBͷ
    4FSWJDF-PBEFS
    ʹΑ࣮ͬͯݱ
    w 4FSWJDF-PBEFS
    ͸಺෦ͰϦϑϨΫγϣϯΛ࢖༻
    w ϦϦʔεϏϧυͰ͸ɺ3ͷ࠷దԽʹΑΓ
    4FSWJDF-PBEFS
    ͷݺͼग़͕͠ ΠϯϥΠϯԽ͞ΕΔ
    w ϦϑϨΫγϣϯͷίʔυ͕আڈ͞ΕɺΦʔόʔϔουθϩʂ
    

    w ͜ͷ࢓૊Έ͸
    %ZOBNJD
    GFBUVSF
    NPEVMF
    Ͱ΋໰୊ͳ͘ಈ࡞͢Δ

14. 6OJU
    UFTUͷॻ͖ํ
     'PP6TF$BTFͷ
    GPP3FQPTJUPSZ
    ΛϞοΫͯ͠ςετ͢Δʹ͸࣍ͷΑ͏ʹॻ͘ class FooRepository(context: Context) { suspend fun findFoo(key:

    String): Foo { /* TODO */ } companion object : ComponentFactory<FooRepository>() { override fun createComponent(context: Context): FooRepository = FooRepository(context) } } class FooUseCase(context: Context) { private val fooRepository by context.component(FooRepository) // snip… }

15. 6OJU
    UFTUͷॻ͖ํ
     @RunWith(AndroidJUnit4::class) class FooUseCaseTest { @Test fun testFooUseCase() {

    val expectedValue = Foo() // Set a mock of FooRepository. mockComponent(FooRepository) { onBlocking { findFoo(any()) } doReturn expectedValue } val context = ApplicationProvider.getApplicationContext() val fooUseCase = FooUseCase(context) // TODO: Write test cases for fooUseCase. } }

16. -JDI
    $PNQPOFOUΛಋೖͨ͠ޮՌ w MB[Z͕؆୯ʹॻ͚ΔͷͰɺىಈ࣌ͷίετΛ࡟ݮ͠΍͘͢ͳͬͨ
    w ϚϧνϞδϡʔϧؒͷґଘؔ܎ղܾ͕ͱͯ΋؆୯ʹͰ͖ΔΑ͏ʹͳͬͨ
    w ڊେͳϞϊϦγοΫϓϩδΣΫτͩͬͨ-*/&ΞϓϦ͕ػೳ͝ͱʹ෼ׂ͞Ε ։ൃޮ཰͕Ξοϓͨ͠
    w %ZOBNJD
    GFBUVSF
    NPEVMF
    ʹΑΓΞϓϦͷ༰ྔΛ࡟ݮͰ͖ΔΑ͏ʹͳͬͨ

17. '"2 w 4JOHMFUPOҎ֎ͷΦϒδΣΫτ͸ѻ͑ͳ͍ͷ
    w 7JFX.PEFMͰ͋Ε͹
    -JDI
    7JFX.PEFM
    ͕࢖͑Δ
    w -JDI
    $PNQPOFOU
    ͱಉ༷ʹ࢖͑Δ΄͔ɺ4BWFE4UBUFΛEFMFHBUFE
    QSPQFSUJFTͱͯ͠ૢ࡞͢Δ͜ͱ΋Ͱ͖Δ
    w

    "DUJWJUZTDPQFE
    ΍
    'SBHNFOUTDPQFE
    ͳΦϒδΣΫτ͸Ϟμϯͳ "OESPJEΞϓϦͰ͸ෆཁͳ͸ͣ
    w ϏδωεϩδοΫ͸7JFX.PEFMҎԼͷ૚ʹ࣮૷͠ɺ"DUJWJUZ΍ 'SBHNFOU͸7JFX.PEFMͱ7JFXͷCJOEJOH͚ͩΛߦ͏΂͖

18. ଞͷ%*πʔϧͱͷ࿈ܞ w ͱ͸͍͑ɺଞͷ%*πʔϧʹ׳Εͨਓʹ͸෺଍Γͳ͍఺΋͋ΔͩΖ͏
    w -JDI
    $PNQPOFOU
    Λଞͷ%*πʔϧͱ૊Έ߹Θͤͯ࢖͏ͷ΋ྑ͍
    w Ϟδϡʔϧؒͷґଘؔ܎ղܾ͚ͩʹ
    -JDI
    $PNQPOFOU
    Λ࢖͏ͳͲ
    w %BHHFSͱ૊Έ߹Θͤͨྫ @Module

    object FooModule { @Provides fun provideFooComponent(application: Application): FooComponent = application.getComponent(FooComponent) }

19. ·ͱΊ w -JDI
    ͸-*/&ΞϓϦͷվળϓϩδΣΫτͷதͰੜ·Εͨ044ϥΠϒϥϦ
    w IUUQTHJUIVCDPNMJOFMJDI
    w -JDI
    $PNQPOFOU
    ͸ΞϓϦͷϚϧνϞδϡʔϧԽΛࢧԉ͢ΔͨΊʹ࡞ΒΕͨ %*πʔϧ
    w ܰྔ͔ͭߴ଎Ͱ͋Δ఺΋ΞϐʔϧϙΠϯτ
    

    w %BHHFSͳͲͷଞͷ%*πʔϧͱ૊Έ߹Θͤͯ࢖͏ͷ΋ྑ͍
    w -JDI
    ʹ͸
    7JFX.PEFM
    ΍
    0L)UUQ
    ͷར༻Λࢧԉ͢ΔͨΊͷϥΠϒϥϦ΋͋Δ

20. 5IBOL
    ZPV