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Toothpick - A fresh approach to DI - Short Version
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Daniel Molinero Reguera
September 26, 2017
Programming
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Toothpick - A fresh approach to DI - Short Version
Presented at GDG East Bay - Samsung office
Daniel Molinero Reguera
September 26, 2017
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Transcript
A FRESH APPROACH TO DI TOOTHPICK https://github.com/stephanenicolas/toothpick/
5IF"OESPJE5FBNJT)JSJOH jobs.groupon.com/careers/ @D_Lemures #ToothpickDI @GrouponEng @SteffNicolas
THE TALK WHY TOOTHPICK? USING TOOTHPICK REUSING INSTANCES
VERSION 2.0 CONCLUSION DEFINING DEPENDENCIES INJECTING DEPENDENCIES MODULES & BINDINGS SCOPE TREE SCOPE SINGLETONS MULTI-ACTIVITY FLOW @D_Lemures | #ToothpickDI
WHY TOOTHPICK? @D_Lemures | #ToothpickDI The Ancient Roma Coffee Machine
Visual Toy javierarres.wordpress.com
WHY TOOTHPICK? SIMPLER BETTER TEST SUPPORT EVEN FASTER @D_Lemures |
#ToothpickDI
USING TOOTHPICK public class DealPresenter { @Inject DealApiClient apiClient;
@Inject Navigator navigator; } @Singleton public class DealApiClient { Retrofit retrofit; @Inject public IceMachine(Retrofit retrofit) { this.retrofit = retrofit; } } JSR 330 annotations→nothing new here @D_Lemures | #ToothpickDI DEFINING DEPENDENCIES
INJECTING DEPENDENCIES public class DealActivity extends Activity { @Inject DealPresenter
presenter; @Override protected void onCreate() { super.onCreate(); Scope appScope = Toothpick.openScope(getApplication()); Toothpick.inject(this, appScope); } } @D_Lemures | #ToothpickDI USING TOOTHPICK
INJECTING DEPENDENCIES @D_Lemures | #ToothpickDI USING TOOTHPICK SCOPE MAKE INJECTIONS
public class DealActivity extends Activity { @Inject DealPresenter presenter; @Override protected void onCreate() { super.onCreate(); Scope appScope = Toothpick.openScope(getApplication()); Toothpick.inject(this, appScope); } }
INJECTING DEPENDENCIES @D_Lemures | #ToothpickDI USING TOOTHPICK DEAL PRESENTER public
class DealActivity extends Activity { @Inject DealPresenter presenter; @Override protected void onCreate() { super.onCreate(); Scope appScope = Toothpick.openScope(getApplication()); Toothpick.inject(this, appScope); } } DEAL APICLIENT NAVIGATOR RETROFIT
public class DealActivity extends Activity { @Inject DealPresenter presenter;
@Override protected void onCreate() { super.onCreate(); Scope appScope = Toothpick.openScope(getApplication()); appScope.installModules(new Module() {{ bind(Navigator.class).to(NavigatorImpl.class); bind(Retrofit.class).toInstance(retrofitInstance); }}); Toothpick.inject(this, appScope); } } MODULES & BINDINGS @D_Lemures | #ToothpickDI USING TOOTHPICK BINDINGS MODULES SCOPE
@D_Lemures | #ToothpickDI USING TOOTHPICK SCOPE 1 SCOPE 2 SCOPE
4 SCOPE 3 MODULES & BINDINGS
APPLICATION SCOPE ACTIVITY 1 SCOPE ACTIVITY 2 SCOPE SERVICE 1
SCOPE FRAGMENT 3 SCOPE FRAGMENT 1 SCOPE FRAGMENT 2 SCOPE SCOPE TREE @D_Lemures | #ToothpickDI USING TOOTHPICK
public class DealActivity extends Activity { @Inject DealPresenter presenter; @Inject
Context context; @Override protected void onCreate() { super.onCreate(); Scope scope = Toothpick.openScope(getApplication(), this); scope.installModules(new Module() {{ bind(Context.class).toInstance(this); }}); Toothpick.inject(this, scope); } } SCOPE TREE APPLICATION SCOPE ACTIVITY SCOPE @D_Lemures | #ToothpickDI USING TOOTHPICK
SCOPE SINGLETONS @D_Lemures | #ToothpickDI REUSING INSTANCES ANDROID INTENT ACTIVITY
FRAGMENT RECYCLER VIEW LOCAL SINGLETON
APPLICATION SCOPE ACTIVITY SCOPE APP SINGLETONS ACTIVITY SINGLETONS SCOPE SINGLETONS
@D_Lemures | #ToothpickDI REUSING INSTANCES
public class Module extends Module { public Module() { bind(ViewHelper.class).toInstance(new
ViewHelper()); } } SCOPE SINGLETONS SINGLETONS CAN BE DEFINED IN MODULES @D_Lemures | #ToothpickDI REUSING INSTANCES
@Singleton public class DealApiClient { } @ActivitySingleton public class ViewHelper
{ } APPLICATION SCOPE ACTIVITY SCOPE SCOPE SINGLETONS OR USING ANNOTATIONS @D_Lemures | #ToothpickDI REUSING INSTANCES
ACTIVITY 1 ACTIVITY 3 ACTIVITY 2 MULTI ACTIVITY FLOWS Purchase
Flow @D_Lemures | #ToothpickDI REUSING INSTANCES
APPLICATION SCOPE ACTIVITY 1 SCOPE FLOW SCOPE ACTIVITY 3 SCOPE
ACTIVITY 2 SCOPE MULTI ACTIVITY FLOWS @D_Lemures | #ToothpickDI REUSING INSTANCES
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); } } @D_Lemures | #ToothpickDI REUSING INSTANCES MULTI ACTIVITY FLOWS
@FlowSingleton public class ShoppingCart { List<PurchaseItem> purchases… } FLOW SCOPE
MULTI ACTIVITY FLOWS @D_Lemures | #ToothpickDI REUSING INSTANCES
VERSION 2.0 RELEASABLE SINGLETONS @D_Lemures | #ToothpickDI BETTER SCOPE ANNOTATIONS
KILLING REGISTRIES BETTER API
CONCLUSION QUESTIONS ? COMMENTS ? @D_Lemures | #ToothpickDI
A FRESH APPROACH TO DI TOOTHPICK https://github.com/stephanenicolas/toothpick/ @D_Lemures #ToothpickDI @GrouponEng
@SteffNicolas