Dagger2 has been released!

Migrated story from Dagger1 to Dagger2 in Qiitanium App

Transcript

1. Dagger 2.0 has been
   released!
   at potatotips #16
   

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2. About me
   Job $> Android Engineer v0.1
   GitHub $> https://github.com/ogaclejapan
   Company $> CyberAgent, Inc.
   Name $> Masaki Ogata (@ogaclejapan)
   

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3. Qiitanium
   

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4. http://github.com/ogaclejapan/qiitanium
   ɾRxJava
   ɾClean Architecture + MVVMʢࣗশʣ
   ɾDagger
   ɾOkHttp
   

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5. http://github.com/ogaclejapan/qiitanium
   ɾ
   ɾ
   ɾDagger
   ɾ
   

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6. http://github.com/ogaclejapan/qiitanium
   ɾ
   ɾ
   ɾDagger 1.x
   ɾ
   Dagger 2.0
   Migrated!
   

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7. About Dagger
   

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8. About Dagger
   Let me ask Wasabeef !!
   https://speakerdeck.com/wasabeef/dagger
   at potatotips #9
   

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9. Dagger2.0 Overview
   

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10. 100% Proguard friendly
    @Generated("dagger.internal.codegen.ComponentProcessor")
    public final class AppModule_ProvideApplicationFactory
    implements Factory {
    private final AppModule module;
    @Override
    public Application get() {
    Application provided = module.provideApplication();
    if (provided == null) {
    throw new NullPointerException("Cannot return null
    from a non-@Nullable @Provides method");
    }
    return provided;
    }
    }
    

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11. 100% Proguard friendly
    ɾ θϩϦϑϨΫγϣϯ
    ɾ ࣗಈੜ੒ίʔυ΋σόοάτϨʔε͕Մೳ
    ɾύϑΥʔϚϯε͕޲্
    

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12. @Component
    Dagger1:
    FeatureModule
    ObjectGraph
    SubModule1
    SubModule2
    SubModule3
    load
    Includes
    AppModule
    plus
    SubGraph
    

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13. @Component
    Dagger1:
    @Module(includes={Module1.class, …}, injects={…})
    public class AppModule {
    @Provided
    public Hoge provideHoge() {
    return new Hoge();
    }
    }
    ObjectGraph graph = ObjectGraph.create(new Object[] {
    new AppModule()});
    graph.inject(this);
    ObjectGraph sub = graph.plus(new FeatureModule());
    

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14. @Component
    Dagger2:
    AppComponent
    FeatureComponent
    Module1
    Module2
    Module3
    modules
    FeatureModule
    AppModule
    modules
    dependencies
    

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15. @Component
    Dagger2:
    @Component(modules={ AppModule.class, …})
    public interface AppComponent {
    public void inject(Application app);
    }
    @Generated(“…”)
    public class DaggerAppComponent {
    //…
    }
    Annotation

    Processor
    AppComponent component = DaggerAppComponent.builder()
    .appModule(…).build();
    component.inject(this);
    

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16. Migrate Dagger 1.x to 2.0

    (ͦͷұ)
    

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17. Scope
    @Module
    public class Module1 {
    @Singleton
    @Provided
    public Hoge provideHoge() {
    return new Hoge();
    }
    }
    @Component(modules = { Module1.class })
    public interface AppComponent {
    //…
    }
    

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18. Error: AppComponent (unscoped) may not reference
    scoped bindings:
    @Singleton @Provides Hoge
    Compile Error…
    

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19. Fix
    @Module
    public class
    @Provided
    public
    return new
    }
    }
    @Component(modules = {
    public interface AppComponent {
    //…
    }
    @Singleton
    

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20. Custom Scope
    Component୯ҐͰΠϯελϯεΛ؅ཧ͍ͯ͠Δ
    @Generated(“…”)
    public final class DaggerAppComponent {
    //…
    private void initialize(final Builder builder) {
    this.…Provider = ScopedProvider.create(…);
    }
    //…
    }
    ScopedProviderͰSingleton੍ޚ͕͞Ε͍ͯΔ
    

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21. Custom Scope
    @Scope
    @Retention(RetentionPolicy.RUNTIME)
    public @interface PerActivity {
    }
    @Module(modules={…})
    public class ActivityModule {
    @PerActivity
    @Provided
    public Hoge provideHoge() {
    return new Hoge();
    }
    }
    Dagger2Ͱ͸ScopeΛಠࣗʹఆٛͯ͠࢖͏
    

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22. Migrate Dagger 1.x to 2.0
    (ͦͷ್)
    

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23. Override Module
    Dagger1: src/debug/java/..
    @Module(addsTo=AppModule.class, override=true, …)
    public class DebugAppModule {
    @Singleton
    @Provided
    public Hoge provideHoge() {
    return new DebugHoge();
    }
    }
    class Modules {
    Object[] list() {
    return ObjectGraph.create(new Object[] {
    new AppModule(),
    new DebugAppModule });
    }
    }
    

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24. Override Module
    Dagger2: src/debug/java/..
    @Module(addsTo=AppModule.class, override=true, …)
    public class DebugAppModule {
    @Singleton
    @Provided
    public Hoge provideHoge() {
    return new DebugHoge();
    }
    }
    class Modules {
    Object[] list() {
    return ObjectGraph.create(new Object[] {
    new AppModule(),
    new DebugAppModule });
    }
    }
    

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25. Override Module
    Dagger2: src/debug/java/..
    @Module(addsTo=AppModule.class, override=true, …)
    public class DebugAppModule extends AppModule {
    @Singleton
    @Provided
    public Hoge provideHoge() {
    return new DebugHoge();
    }
    }
    class Modules {
    Object[] list() {
    return ObjectGraph.create(new Object[] {
    new AppModule(),
    new DebugAppModule });
    }
    }
    

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26. Override Module
    Dagger2: src/debug/java/..
    @Module(addsTo=AppModule.class, override=true, …)
    public class DebugAppModule extends AppModule {
    @Singleton
    @Provided
    @Override
    public Hoge provideHoge() {
    return new DebugHoge();
    }
    }
    class Modules {
    Object[] list() {
    return ObjectGraph.create(new Object[] {
    new AppModule(),
    new DebugAppModule });
    }
    }
    

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27. Override Module
    Dagger2: src/debug/java/..
    @Module(addsTo=AppModule.class, override=true, …)
    public class DebugAppModule extends AppModule {
    @Singleton
    @Provided
    @Override
    public Hoge provideHoge() {
    return new DebugHoge();
    }
    }
    class Modules {
    Object[] list() {
    return ObjectGraph.create(new Object[] {
    new AppModule(),
    new DebugAppModule });
    }
    }
    

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28. Override Module
    Dagger2: src/debug/java/..
    @Module(addsTo=AppModule.class, override=true, …)
    public class DebugAppModule extends AppModule {
    @Singleton
    @Provided
    @Override
    public Hoge provideHoge() {
    return new DebugHoge();
    }
    }
    class Modules {
    AppModule appModule() {
    return new DebugAppModule();
    }
    }
    

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29. Override Module
    Dagger2: src/main/java/..
    public class MyApplication extends Application {
    @Inject Hoge mHoge;
    @Override
    public void onCreate() {
    AppComponent component = DaggerAppComponent.builder()
    .appModule(Modules.appModule())
    .build();
    component.inject(this);
    System.out.println(mHoge instanceof DebugHoge); //true
    }
    }
    

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30. Let’s enjoy Dagger2 !!
    

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31. ͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠
    m(_ _)m
    

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