真・なぜ誰もこう書いてくれないDependency Injection入門

Transcript

1. ͳͥ୭΋͜͏ॻ͍ͯ͘Εͳ͍
   %FQFOEFODZ
   *OKFDUJPOೖ໳ TBJLPV LPKJTBJLJ
    ਅ
2. ͓·͑͸୭ ͓ͳ·͑ɿࠤഢߛೋʢ͍͖͜͞͏͡ʣ
   ͱ͜Ζɿ෱Ԭʗେࡕ
   ͭͿ΍͖ɿIUUQTUXJUUFSDPNTBJLPV
   ͗ͬ͸ͿɿIUUQTHJUIVCDPNLPKJTBJLJ
   ͿΖ͙ɿIUUQJSPOZIBUFOBCMPHDPN
3. %*ೖ໳ʹ͸؊͕ॻ͔Εͯ ແ͍ʢେ൒ʣ
4. ਅͷ%*ೖ໳Λ͓ݟͤ͠· ͠ΐ͏ ʆɾТɾ
5. ͍ΘΏΔzೖ໳αΠτz
   Ұ୴๨Ε·͠ΐ͏
6. ΞδΣϯμ %*Λz֮͑Δz
   %*Λzղ͘z
   ·ͱΊ
7. ΞδΣϯμ %*Λz֮͑Δz
   %*Λzղ͘z
   ·ͱΊ
8. ૣ଎ίʔυΛݟ·͠ΐ͏
9. class GasolineCar { private GasolineEngine engine; constructor() { this.engine = new GasolineEngine(); } startEngine() { this.engine.start(); } accelEngine() { this.engine.accelerate(); } } ˞ٙࣅίʔυͰ͢
10. class DieselCar { private DieselEngine engine; constructor() { this.engine = new DieselEngine(); } startEngine() { this.engine.start(); } accelEngine() { this.engine.accelerate(); } }
11. ͳΜͱ͔͍ͨ͠ɾɾɾ &OHJOFҎ֎͸࠶ར༻Ͱ͖ͦ͏
    &OHJOF΋࢖͍ํʢTUBSUͱ͔ʣ͸ಉͬ͡Ά͍ class GasolineCar { private GasolineEngine engine; constructor() { this.engine = new GasolineEngine(); } startEngine() { this.engine.start(); } accelEngine() { this.engine.accelerate(); } } class DieselCar { private DieselEngine engine; constructor() { this.engine = new DieselEngine(); } startEngine() { this.engine.start(); } accelEngine() { this.engine.accelerate(); } }
12. interface Engine { void start(); void accelerate(); } class Car { private Engine engine; public Car(Engine _engine) { this.engine = _engine; } void startEngine() { this.engine.start(); } void accelEngine() { this.engine.accelerate(); } }
13. interface Engine { void start(); void accelerate(); } class Car { private Engine engine; public Car(Engine _engine) { this.engine = _engine; } void startEngine() { this.engine.start(); } void accelEngine() { this.engine.accelerate(); } } *OUFSGBDFΛ
    Ҿ਺Ͱ౉ͤ͹εοΩϦʂ
14. Ҏ্ʂ
    %*͓ΘΓʂ
15. ΍ͬͨͶʂ
16. ͸ʁ z࢖͍ํ͸ಉ͚ͩ͡Ͳಈ͖͕ҧ͏Πϯελϯεz ͸ɺ࢖͏৔ॴΑΓ΋֎͔Β༩͑Ε͹ղܾʂ
17. ͸ʁ z࢖͍ํ͸ಉ͚ͩ͡Ͳಈ͖͕ҧ͏Πϯελϯεz ͸ɺ࢖͏৔ॴΑΓ΋֎͔Β༩͑Ε͹ղܾʂ %*ͷߟ͑ํ͸ʮ͜Ε͚ͩʯʂϚδͰɻ
18. ֮͋͑͞Α͏ʂ z࢖͍ํ͸ಉ͚ͩ͡Ͳಈ͖͕ҧ͏Πϯελϯεz
19. ֮͋͑͞Α͏ʂ z࢖͍ํ͸ಉ͚ͩ͡Ͳಈ͖͕ҧ͏Πϯελϯεz z࢖͍ํ͸ಉ͚ͩ͡Ͳಈ͖͕ҧ͏Πϯελϯεz
20. ֮͋͑͞Α͏ʂ z࢖͍ํ͸ಉ͚ͩ͡Ͳಈ͖͕ҧ͏Πϯελϯεz z࢖͍ํ͸ಉ͚ͩ͡Ͳಈ͖͕ҧ͏Πϯελϯεz z࢖͍ํ͸ಉ͚ͩ͡Ͳಈ͖͕ҧ͏Πϯελϯεz
21. ֮͋͑͞Α͏ʂ z࢖͍ํ͸ಉ͚ͩ͡Ͳಈ͖͕ҧ͏Πϯελϯεz z࢖͍ํ͸ಉ͚ͩ͡Ͳಈ͖͕ҧ͏Πϯελϯεz z࢖͍ํ͸ಉ͚ͩ͡Ͳಈ͖͕ҧ͏Πϯελϯεz
22. ΞδΣϯμ %*Λz֮͑Δz
    %*Λzղ͘z
    ·ͱΊ
23. Α͋͘Δz%*ͷޮೳz ࢓༷มߋʹڧ͘ͳΔ
    ςετ͕͠΍͘͢ͳΔ
24. ࢓༷มߋʹڧ͘ͳΔ
25. ࢓༷มߋʹڧ͘ͳΔ
    ʹ҆શʹมߋͰ͖Δ
    
26. ࢓༷มߋʹڧ͘ͳΔ
    ʹ҆શʹมߋͰ͖Δ
    ʹӨڹൣғ͕ݮΔ
27. %*લ class Owner { main() { GasolineCar gasolineCar = New GasolineCar(); DieselCar dieselCar = New DieselCar(); } } class GasolineCar {} class DieselCar {} )ZCSJE$BSΛ௥Ճ ͠Α͏
28. %*લ class Owner { main() { GasolineCar gasolineCar = New GasolineCar(); DieselCar dieselCar = New DieselCar(); // ௥Ճ HybridCar hybridCar = New HybridCar(); } } class GasolineCar {} class DieselCar {} class HybridCar { private HybridEngine engine; public HybridCar() { this.engine = new HybridEngine(); } startEngine() { this.engine.start(); } accelEngine() { this.engine.accelerate(); } } ͜ͷ͘Β͍௥Ճ
29. %*ޙ class Owner { main() { GasolineEngine gasolineEngine = new GasolineEngine(); Car gasolineCar = new Car(gasolineEngine); DieselEngine dieselEngine = new DieselEngine(); Car dieselCar = new Car(dieselEngine); } } interface Engine { void start(); void accelerate(); } class Car { private Engine engine; public Car(Engine _engine) { this.engine = _engine; } void startEngine() { this.engine.start(); } void accelEngine() { this.engine.accelerate(); } }
30. %*ޙ class Owner { main() { GasolineEngine gasolineEngine = new GasolineEngine(); Car gasolineCar = new Car(gasolineEngine); DieselEngine dieselEngine = new DieselEngine(); Car dieselCar = new Car(dieselEngine); // ௥Ճ HybridEngine hybridEngine = new HybridEngine(); Car hybridCar = new Car(hybridEngine); } } interface Engine { void start(); void accelerate(); } class Car { private Engine engine; public Car(Engine _engine) { this.engine = _engine; } void startEngine() { this.engine.start(); } void accelEngine() { this.engine.accelerate(); } } ͜Ε͚ͩͰ0,
31. ࢓༷มߋʹڧ͘ͳͬͨʂ
32. ςετ͕͠΍͘͢ͳΔ
33. ςετ͕͠΍͘͢ͳΔ
    ʹग़ೖޱ͕҆ఆ͢Δ
34. ςετ͕͠΍͘͢ͳΔ
    ʹग़ೖޱ͕҆ఆ͢Δ
    ʹΠϯλϑΣʔεͷ
    ɹ௥Ճɾมߋ͕ݮΔ
35. %*લ class Owner { main() { GasolineCar gasolineCar = New GasolineCar(); DieselCar dieselCar = New DieselCar(); // ௥Ճ HybridCar hybridCar = New HybridCar(); } } class GasolineCar {} class DieselCar {} class HybridCar { private HybridEngine engine; public HybridCar() { this.engine = new HybridEngine(); } startEngine() { this.engine.start(); } accelEngine() { this.engine.accelerate(); } }
36. %*લ class Owner { main() { GasolineCar gasolineCar = New GasolineCar(); DieselCar dieselCar = New DieselCar(); // ௥Ճ HybridCar hybridCar = New HybridCar(); } } class GasolineCar {} class DieselCar {} class HybridCar { private HybridEngine engine; public HybridCar() { this.engine = new HybridEngine(); } startEngine() { this.engine.start(); } accelEngine() { this.engine.accelerate(); } } ૿͑ͨΠϯλϑΣʔε
37. %*લ class Owner { main() { GasolineCar gasolineCar = New GasolineCar(); DieselCar dieselCar = New DieselCar(); // ௥Ճ HybridCar hybridCar = New HybridCar(); } } class GasolineCar {} class DieselCar {} class HybridCar { private HybridEngine engine; public HybridCar() { this.engine = new HybridEngine(); } startEngine() { this.engine.start(); } accelEngine() { this.engine.accelerate(); } } ςετ͢Δൣғ
38. %*ޙ class Owner { main() { GasolineEngine gasolineEngine = new GasolineEngine(); Car gasolineCar = new Car(gasolineEngine); DieselEngine dieselEngine = new DieselEngine(); Car dieselCar = new Car(dieselEngine); // ௥Ճ HybridEngine hybridEngine = new HybridEngine(); Car hybridCar = new Car(hybridEngine); } } interface Engine { void start(); void accelerate(); } class Car { private Engine engine; public Car(Engine _engine) { this.engine = _engine; } void startEngine() { this.engine.start(); } void accelEngine() { this.engine.accelerate(); } }
39. %*ޙ class Owner { main() { GasolineEngine gasolineEngine = new GasolineEngine(); Car gasolineCar = new Car(gasolineEngine); DieselEngine dieselEngine = new DieselEngine(); Car dieselCar = new Car(dieselEngine); // ௥Ճ HybridEngine hybridEngine = new HybridEngine(); Car hybridCar = new Car(hybridEngine); } } interface Engine { void start(); void accelerate(); } class Car { private Engine engine; public Car(Engine _engine) { this.engine = _engine; } void startEngine() { this.engine.start(); } void accelEngine() { this.engine.accelerate(); } } ૿͑ɾɾɾͯͳ͍ʂ
40. %*ޙ class Owner { main() { GasolineEngine gasolineEngine = new GasolineEngine(); Car gasolineCar = new Car(gasolineEngine); DieselEngine dieselEngine = new DieselEngine(); Car dieselCar = new Car(dieselEngine); // ௥Ճ HybridEngine hybridEngine = new HybridEngine(); Car hybridCar = new Car(hybridEngine); } } interface Engine { void start(); void accelerate(); } class Car { private Engine engine; public Car(Engine _engine) { this.engine = _engine; } void startEngine() { this.engine.start(); } void accelEngine() { this.engine.accelerate(); } } ͜ͷྲྀΕ͚ͩ
    ςετ͢Ε͹0,
41. ςετ͠΍͘͢ͳͬͨʂ
42. Α͋͘Δz%*ͷޮೳz ࢓༷มߋʹڧ͘ͳΔ
    ςετ͕͠΍͘͢ͳΔ
43. Α͋͘Δz%*ͷޮೳz ࢓༷มߋʹڧ͘ͳΔ
    ςετ͕͠΍͘͢ͳΔ 2&%
    ʢূ໌ऴྃʣ
44. ͜͜·ͰͰ͖ͨਓ͸
    ࣍ʹԿΛߟ͑Δʁ
45. ͜͜·ͰͰ͖ͨਓ͸
    ࣍ʹԿΛߟ͑Δʁ ͦ΋ͦ΋ΠϯελϯεΛOFX͢Δॲཧ΋ॻ͖ͨ ͘ͳ͍ʂ
46. ͜͜·ͰͰ͖ͨਓ͸
    ࣍ʹԿΛߟ͑Δʁ ͦ΋ͦ΋ΠϯελϯεΛOFX͢Δॲཧ΋ॻ͖ͨ ͘ͳ͍ʂ
    ςετͷ࣌ͱຊ൪ͷ࣌ͰΠϯελϯεΛ੾Γସ ͍͚͑ͨͲɺίʔυ৮Γͨ͘ͳ͍ʂ
47. ͜͜·ͰͰ͖ͨਓ͸
    ࣍ʹԿΛߟ͑Δʁ ͦ΋ͦ΋ΠϯελϯεΛOFX͢Δॲཧ΋ॻ͖ͨ ͘ͳ͍ʂ
    ςετͷ࣌ͱຊ൪ͷ࣌ͰΠϯελϯεΛ੾Γସ ͍͚͑ͨͲɺίʔυ৮Γͨ͘ͳ͍ʂ
    ͦΜͳপͳྟػԠมͳػೳΛΘ͟Θࣗ͟෼Ͱ࡞ Γͨ͘ͳ͍ʂ
48. ͜͜·ͰͰ͖ͨਓ͸
    ࣍ʹԿΛߟ͑Δʁ ͦ΋ͦ΋ΠϯελϯεΛOFX͢Δॲཧ΋ॻ͖ͨ ͘ͳ͍ʂ
    ςετͷ࣌ͱຊ൪ͷ࣌ͰΠϯελϯεΛ੾Γସ ͍͚͑ͨͲɺίʔυ৮Γͨ͘ͳ͍ʂ
    ͦΜͳপͳྟػԠมͳػೳΛΘ͟Θࣗ͟෼Ͱ࡞ Γͨ͘ͳ͍ʂ ΋ͬͱָʹɾɾɾ
49. ͜͜·ͰͰ͖ͨਓ͸
    ࣍ʹԿΛߟ͑Δʁ ͦ΋ͦ΋ΠϯελϯεΛOFX͢Δॲཧ΋ॻ͖ͨ ͘ͳ͍ʂ
    ςετͷ࣌ͱຊ൪ͷ࣌ͰΠϯελϯεΛ੾Γସ ͍͚͑ͨͲɺίʔυ৮Γͨ͘ͳ͍ʂ
    ͦΜͳপͳྟػԠมͳػೳΛΘ͟Θࣗ͟෼Ͱ࡞ Γͨ͘ͳ͍ʂ ΋ͬͱָʹɾɾɾ
50. 4QSJOH
    %*ͷ৔߹ @Component class GasolineEngine { ... } @ComponentScan class MyApp { public static void main(String[] args) { ... } } class Car { @Autowired private Engine engine; public Car() { } ... }
51. 4QSJOH
    %*ͷ৔߹ @Component class GasolineEngine { ... } @ComponentScan class MyApp { public static void main(String[] args) { ... } } class Car { @Autowired private Engine engine; public Car() { } ... }
52. 4QSJOH
    %*ͷ৔߹ @Component class GasolineEngine { ... } @ComponentScan class MyApp { public static void main(String[] args) { ... } } class Car { @Autowired private Engine engine; public Car() { } ... } Ξϊςʔγϣϯ͚ͭΔ ͚ͩͰOFXͯ͠ϑΟʔϧυʹηο τͯ͘͠ΕΔ
    ʹ͍͢͝
53. ͜Μͳ;͏ʹ
    %*ͯ͘͠ΕΔࠇຐज़
    ʹ͍ΘΏΔz%*ίϯςφz
54. ৽͍͠%*ίϯςφʹ
    ग़ձͬͨΒ
55. ৽͍͠%*ίϯςφʹ
    ग़ձͬͨΒ ͲΜͳهड़ͰউखʹOFXͯ͘͠ΕΔ͔Λ஌Ζ͏ʂ
56. ৽͍͠%*ίϯςφʹ
    ग़ձͬͨΒ ͲΜͳهड़ͰউखʹOFXͯ͘͠ΕΔ͔Λ஌Ζ͏ʂ
    ͲΜͳهड़Ͱউखʹ஫ೖͯ͘͠ΕΔ͔Λ஌Ζ͏ʂ
57. ৽͍͠%*ίϯςφʹ
    ग़ձͬͨΒ ͲΜͳهड़ͰউखʹOFXͯ͘͠ΕΔ͔Λ஌Ζ͏ʂ
    ͲΜͳهड़Ͱউखʹ஫ೖͯ͘͠ΕΔ͔Λ஌Ζ͏ʂ
    ͲΜͳϧʔϧͰɺΠϯελϯεͱ஫ೖઌ͕ඥ͚ͮ ΒΕΔ͔Λ஌Ζ͏ʂ
58. 4QSJOH
    %*ͷ৔߹ @Component(“engine”) class GasolineEngine implements Engine { ... } class Car { @Autowired private Engine engine; public Car() { } ... } @Component(“old_engine”) class DieselEngine implements Engine { ... }
59. 4QSJOH
    %*ͷ৔߹ @Component(“engine”) class GasolineEngine implements Engine { ... } class Car { @Autowired private Engine engine; public Car() { } ... } @Component(“old_engine”) class DieselEngine implements Engine { ... }
60. ΞδΣϯμ %*Λz֮͑Δz
    %*Λzղ͘z
    ·ͱΊ
61. ·ͱΊ %*͸z࢖͍ํ͸ಉ͚ͩ͡Ͳಈ͖͕ҧ͏Πϯελϯ εzΛ֎͔Β஫ೖͯ͠εοΩϦͤ͞Δ͜ͱɻ͋ͱ ͸શ෦ͦͷԆ௕ઢ্ɻ
    %*ίϯςφ͸ɺͪΐͬͱ໋ྩ͢Ε͹%*ͯ͘͠Ε Δศརͳ΍ͭɻ
62. ͓·͚
    z%*ίϯςφzͱ͍͏ݴ༿Λ
    ಄ʹམͱ͢ίπ
63. ͜͏͡Όͳͯ͘
64. ͜͏
65. Ͱɺ͜͏ ΦϒδΣΫτ
    Πϯελϯε԰ γϯάϧτϯ
    औΓଗ͑ͯ·͢ʂ ΦʔμʔϝΠυ
    ঝΓ·͢ʂ
66. TBJLPV LPKJTBJLJ ͓ΘΓ