Toothpick - A fresh approach to DI

Presented at Mobile Era 2016, Andevcon SF 2016 and Andevcon Washington 2017

Transcript

1. A FRESH APPROACH TO DI TOOTHPICK https://github.com/stephanenicolas/toothpick/
2. ABOUT US Senior Android Dev @ Groupon
 ~20 years of Java coding OSS: Dart, TP, BoundBox, … STEPHANE NICOLAS DANIEL MOLINERO REGUERA Android Dev @ Groupon
 Turbulence Ninja OSS: Dart, TP. +stephane @D_Lemures
3. 5IF
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 jobs.groupon.com/careers/
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
5. WHY DI ?
6. WHY DI ? DECOUPLE
7. WHY DI ? DECOUPLE USES
8. WHY DI ? DECOUPLE REUSE USES
9. WHY DI ? DECOUPLE REUSE USES USES USES
10. WHY DI ? DECOUPLE REUSE TEST USES USES USES
11. WHY DI ? DECOUPLE REUSE TEST USES USES USES MOCK USES
12. WHY TOOTHPICK?
13. WHY TOOTHPICK? SIMPLER
14. WHY TOOTHPICK? SIMPLER BETTER TEST SUPPORT
15. WHY TOOTHPICK? SIMPLER BETTER TEST SUPPORT EVEN FASTER
16. 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;
 }

17. 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
18. TOOTHPICK FEATURES SCOPE SCOPE
19. TOOTHPICK FEATURES SCOPE SCOPE MAKE INJECTIONS
20. 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);
 } }
21. TOOTHPICK FEATURES SCOPE, MODULES & BINDINGS SCOPE
22. TOOTHPICK FEATURES SCOPE, MODULES & BINDINGS SCOPE BINDINGS
23. TOOTHPICK FEATURES SCOPE, MODULES & BINDINGS SCOPE BINDINGS MODULES
24. 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);
 } }
25. TOOTHPICK FEATURES APPLICATION
 SCOPE ACTIVITY 1
 SCOPE SCOPE TREE
26. TOOTHPICK FEATURES APPLICATION
 SCOPE SCOPE TREE
27. TOOTHPICK FEATURES APPLICATION
 SCOPE ACTIVITY 2
 SCOPE SCOPE TREE
28. TOOTHPICK FEATURES APPLICATION
 SCOPE ACTIVITY 2
 SCOPE SERVICE 1
 SCOPE SCOPE TREE
29. TOOTHPICK FEATURES APPLICATION
 SCOPE ACTIVITY 2
 SCOPE SERVICE 1
 SCOPE FRAGMENT 1
 SCOPE SCOPE TREE
30. TOOTHPICK FEATURES APPLICATION
 SCOPE ACTIVITY 2
 SCOPE SERVICE 1
 SCOPE FRAGMENT 1
 SCOPE FRAGMENT 2
 SCOPE SCOPE TREE
31. TOOTHPICK FEATURES APPLICATION
 SCOPE ACTIVITY 2
 SCOPE SERVICE 1
 SCOPE FRAGMENT 3
 SCOPE FRAGMENT 1
 SCOPE FRAGMENT 2
 SCOPE SCOPE TREE
32. TOOTHPICK FEATURES public class LemonActivity extends Activity {
 
 @Inject Machine machine; @Inject Context context;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 Scope scope = Toothpick.openScopes(getApplication(), this);
 scope.installModules(…);
 Toothpick.inject(this, scope);
 } } SCOPE TREE
33. TOOTHPICK FEATURES public class LemonActivity extends Activity {
 
 @Inject Machine machine; @Inject Context context;
 
 @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
34. TOOTHPICK FEATURES APPLICATION
 SCOPE ACTIVITY
 SCOPE SCOPE SINGLETONS
35. TOOTHPICK FEATURES APPLICATION
 SCOPE ACTIVITY
 SCOPE APP SINGLETONS SCOPE SINGLETONS
36. TOOTHPICK FEATURES APPLICATION
 SCOPE ACTIVITY
 SCOPE APP SINGLETONS ACTIVITY SINGLETONS SCOPE SINGLETONS
37. TOOTHPICK FEATURES public class Module extends Module {
 public Module() {
 bind(Machine.class).toInstance(new Ice Machine());
 }
 } SCOPE SINGLETONS SINGLETONS CAN BE DEFINED IN MODULES
38. TOOTHPICK FEATURES @Singleton
 public class IceMachine {
 } @ActivitySingleton
 public class SmoothieMachine {
 } APPLICATION
 SCOPE ACTIVITY
 SCOPE SCOPE SINGLETONS OR USING ANNOTATIONS
39. ADVANCED TOOTHPICK FEATURES MVP & STATE PRESERVATION
40. ADVANCED TOOTHPICK FEATURES MVP & STATE PRESERVATION
41. ADVANCED TOOTHPICK FEATURES MVP & STATE PRESERVATION
42. APPLICATION SCOPE ADVANCED TOOTHPICK FEATURES MVP & STATE PRESERVATION ACTIVITY SCOPE
43. APPLICATION SCOPE ADVANCED TOOTHPICK FEATURES MVP & STATE PRESERVATION ACTIVITY SCOPE
44. APPLICATION SCOPE PRESENTER SCOPE ADVANCED TOOTHPICK FEATURES MVP & STATE PRESERVATION ACTIVITY SCOPE
45. PRESENTER INSTANCE APPLICATION SCOPE PRESENTER SCOPE ADVANCED TOOTHPICK FEATURES MVP & STATE PRESERVATION ACTIVITY SCOPE
46. PRESENTER INSTANCE APPLICATION SCOPE PRESENTER SCOPE ADVANCED TOOTHPICK FEATURES MVP & STATE PRESERVATION
47. PRESENTER INSTANCE APPLICATION SCOPE PRESENTER SCOPE ADVANCED TOOTHPICK FEATURES MVP & STATE PRESERVATION ACTIVITY SCOPE
48. 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);
 } }
49. @PresenterSingleton
 public class MyPresenter {
 String dealId;
 int quantity;
 } PRESENTER SCOPE MVP & STATE PRESERVATION ADVANCED TOOTHPICK FEATURES
50. ACTIVITY 1 ADVANCED TOOTHPICK FEATURES ACTIVITY 3 ACTIVITY 2 MULTI ACTIVITY FLOWS
51. ACTIVITY 1 ADVANCED TOOTHPICK FEATURES ACTIVITY 3 ACTIVITY 2 MULTI ACTIVITY FLOWS Purchase Flow
52. ACTIVITY 1 ADVANCED TOOTHPICK FEATURES ACTIVITY 3 ACTIVITY 2 MULTI ACTIVITY FLOWS Purchase Flow
53. ACTIVITY 1 ADVANCED TOOTHPICK FEATURES ACTIVITY 3 ACTIVITY 2 MULTI ACTIVITY FLOWS
54. ACTIVITY 1 ADVANCED TOOTHPICK FEATURES ACTIVITY 3 ACTIVITY 2 MULTI ACTIVITY FLOWS
55. ACTIVITY 1 ADVANCED TOOTHPICK FEATURES ACTIVITY 3 ACTIVITY 2 MULTI ACTIVITY FLOWS
56. ACTIVITY 1 ADVANCED TOOTHPICK FEATURES ACTIVITY 3 ACTIVITY 2 MULTI ACTIVITY FLOWS
57. APPLICATION SCOPE ACTIVITY 1 SCOPE ADVANCED TOOTHPICK FEATURES FLOW SCOPE MULTI ACTIVITY FLOWS
58. APPLICATION SCOPE ACTIVITY 1 SCOPE ADVANCED TOOTHPICK FEATURES FLOW SCOPE MULTI ACTIVITY FLOWS
59. APPLICATION SCOPE ACTIVITY 1 SCOPE ADVANCED TOOTHPICK FEATURES FLOW SCOPE ACTIVITY 2 SCOPE MULTI ACTIVITY FLOWS
60. APPLICATION SCOPE ACTIVITY 1 SCOPE ADVANCED TOOTHPICK FEATURES FLOW SCOPE ACTIVITY 3 SCOPE ACTIVITY 2 SCOPE MULTI ACTIVITY FLOWS
61. APPLICATION SCOPE ADVANCED TOOTHPICK FEATURES FLOW SCOPE MULTI ACTIVITY FLOWS
62. APPLICATION SCOPE ADVANCED TOOTHPICK FEATURES MULTI ACTIVITY FLOWS
63. 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);
 } }
64. @FlowSingleton
 public class ShoppingCart {
 List<PurchaseItem> purchases…
 } FLOW SCOPE MULTI ACTIVITY FLOWS ADVANCED TOOTHPICK FEATURES
65. CONCLUSION QUESTIONS ? COMMENTS ?
66. CONCLUSION QUESTIONS ? COMMENTS ?
67. A FRESH APPROACH TO DI TOOTHPICK https://github.com/stephanenicolas/toothpick/ +stephane @D_Lemures