TP-Mobile-Era-2016-final-compressed.pdf

Introduction to Toothpick: a fresh approach to DI
(Java / Android)

Transcript

1. A FRESH APPROACH TO DI
   TOOTHPICK
   https://github.com/stephanenicolas/toothpick/
   

   View Slide

2. ABOUT US
   Senior Android Dev @ Groupon
   ~20 years of Java coding
   OSS: Dart, TP
   STEPHANE NICOLAS
   DANIEL MOLINERO REGUERA
   Android Dev @ Groupon
   Best level 3 ever
   OSS: Dart,
   +stephane)nicolas
   @D_Lemures
   

   View Slide

3. 5IF"OESPJE5FBNJT)JSJOH

   jobs.groupon.com/careers/
   

   View Slide

4. THE TALK
   WHY DI ?
   WHY TOOTHPICK?
   TOOTHPICK FEATURES
   

   ADVANCED FEATURES
   

   

   CONCLUSION
   SCOPE
   MODULES & BINDINGS
   SCOPE TREE
   SCOPE SINGLETONS
   MVP & STATE PRESERVATION
   MULTIPLE ACTIVITIES FLOWS
   

   View Slide

5. WHY DI ?
   DECOUPLE
   REUSE
   TEST
   USES
   USES
   USES
   MOCK
   USES
   

   View Slide

6. WHY TOOTHPICK?
   SIMPLER
   BETTER TEST SUPPORT
   EVEN FASTER
   

   View Slide

7. TOOTHPICK FEATURES
   public class SmoothieMachine {

   

   @Inject IceMachine iceMachine;

   

   public void doSmoothie() {

   iceMachine.makeIce();

   }

   }
   @Singleton

   public class IceMachine {

   Foo foo;

   

   @Inject

   public IceMachine(Foo foo) {

   this.foo = foo;

   }

   JSR 330 annotations→nothing new here
   

   View Slide

8. TOOTHPICK FEATURES
   SCOPE
   SCOPE MAKE INJECTIONS
   public class MyApplication extends Application {
   @Inject Machine machine;

   

   @Override
   protected void onCreate() {

   super.onCreate();

   

   Scope appScope = Toothpick.openScope(this);
   appScope.installModules(…);
   Toothpick.inject(this, appScope);

   }
   }
   

   View Slide

9. TOOTHPICK FEATURES
   SCOPE, MODULES & BINDINGS
   SCOPE
   BINDINGS
   MODULES
   public class MyApplication extends Application {
   @Inject Machine machine;

   

   @Override
   protected void onCreate() {

   super.onCreate();

   

   Scope appScope = Toothpick.openScope(this);
   appScope.installModules(new Module() {{

   bind(Machine.class).to(IceMachine.class);
   }});

   Toothpick.inject(this, appScope);

   }
   }
   

   View Slide

10. TOOTHPICK FEATURES
    APPLICATION

    SCOPE
    ACTIVITY 1

    SCOPE
    ACTIVITY 2

    SCOPE
    SERVICE 1

    SCOPE
    FRAGMENT 3

    SCOPE
    FRAGMENT 1

    SCOPE
    FRAGMENT 2

    SCOPE
    SCOPE TREE
    

    View Slide

11. TOOTHPICK FEATURES
    public class LemonActivity extends Activity {

    

    @Inject SmoothieMachine smoothieMachine;

    

    @Override

    protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    Scope scope = Toothpick.openScopes(getApplication(), this);

    scope.installModules(…);

    Toothpick.inject(this, scope);

    }
    }
    SCOPE TREE
    APPLICATION

    SCOPE
    ACTIVITY

    SCOPE
    

    View Slide

12. TOOTHPICK FEATURES
    APPLICATION

    SCOPE
    ACTIVITY

    SCOPE
    APP SINGLETONS
    ACTIVITY SINGLETONS
    SCOPE SINGLETONS
    

    View Slide

13. TOOTHPICK FEATURES
    public class Module extends Module {

    public Module1() {

    bind(Machine.class).toInstance(new IceMachine());

    }

    }
    SCOPE SINGLETONS
    SINGLETONS CAN BE DEFINED IN MODULES
    

    View Slide

14. TOOTHPICK FEATURES
    @Singleton

    public class IceMachine {

    }
    @ActivitySingleton

    public class SmoothieMachine {

    }
    APPLICATION

    SCOPE
    ACTIVITY

    SCOPE
    SCOPE SINGLETONS
    OR USING ANNOTATIONS
    

    View Slide

15. ADVANCED TOOTHPICK FEATURES
    MVP & STATE PRESERVATION
    

    View Slide

16. ADVANCED TOOTHPICK FEATURES
    MVP & STATE PRESERVATION
    Landscape Portrait
    

    View Slide

17. PRESENTER INSTANCE
    APPLICATION
    SCOPE
    PRESENTER
    SCOPE
    ADVANCED TOOTHPICK FEATURES
    MVP & STATE PRESERVATION
    ACTIVITY
    SCOPE
    

    View Slide

18. ADVANCED TOOTHPICK FEATURES
    MVP & STATE PRESERVATION
    public class MyActivity extends Activity {

    

    @Inject MyPresenter presenter;
    

    @Override

    protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    Scope scope = openScopes(getApplication(), 

    PresenterSingleton.class, 

    this);

    Toothpick.inject(this, scope);

    }
    }
    

    View Slide

19. @PresenterSingleton

    public class MyPresenter {

    String dealId;

    int quantity;

    }
    PRESENTER
    SCOPE
    MVP & STATE PRESERVATION
    ADVANCED TOOTHPICK FEATURES
    

    View Slide

20. ACTIVITY 1
    ADVANCED TOOTHPICK FEATURES
    ACTIVITY 3
    ACTIVITY 2
    MULTI ACTIVITY FLOWS
    Purchase Flow
    !
    

    View Slide

21. APPLICATION
    SCOPE
    ACTIVITY 1
    SCOPE
    ADVANCED TOOTHPICK FEATURES
    FLOW SCOPE
    ACTIVITY 3
    SCOPE
    ACTIVITY 2
    SCOPE
    MULTI ACTIVITY FLOWS
    

    View Slide

22. ADVANCED TOOTHPICK FEATURES
    MVP & STATE PRESERVATION
    public class MyActivity extends Activity {

    

    @Inject ShoppingCart shoppingCart;
    

    @Override

    protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    Scope scope = openScopes(getApplication(), 

    FlowSingleton.class, 

    this);

    Toothpick.inject(this, scope);

    }
    }
    

    View Slide

23. @FlowSingleton

    public class ShoppingCart {

    List purchases…

    }
    FLOW SCOPE
    MULTI ACTIVITY FLOWS
    ADVANCED TOOTHPICK FEATURES
    

    View Slide

24. CONCLUSION
    QUESTIONS ?
    COMMENTS ?
    

    View Slide

25. A FRESH APPROACH TO DI
    TOOTHPICK
    https://github.com/stephanenicolas/toothpick/
    +stephane)nicolas
    @D_Lemures
    

    View Slide