Talk on design patterns in CakePHP given at CakeFest 2013 in San Francisco, USA.

1. Patterns In Your PastryPatterns In Your Pastry
Image credit:Image credit: EvelynGiggles (EvelynIsHere)EvelynGiggles (EvelynIsHere) - http://www.flickr.com/photos/evelynishere/3662124836- http://www.flickr.com/photos/evelynishere/3662124836
James Watts
james.watts @ cakephp.org
CakeFest 2013: The CakePHP Conference
August 31st
, 2013 – San Francisco, USA

2. WARNINGWARNING
Image credit:Image credit: Vegan Feast Catering (VeganFeast)Vegan Feast Catering (VeganFeast) - http://www.flickr.com/photos/veganfeast/4139656092- http://www.flickr.com/photos/veganfeast/4139656092

3. WARNINGWARNING
You may feel hungryYou may feel hungry
at some point duringat some point during
this presentationthis presentation
Image credit:Image credit: Vegan Feast Catering (VeganFeast)Vegan Feast Catering (VeganFeast) - http://www.flickr.com/photos/veganfeast/4139656092- http://www.flickr.com/photos/veganfeast/4139656092

4. Design PatternsDesign Patterns
Image credit:Image credit: Andrew Michaels (dragontomato)Andrew Michaels (dragontomato) - http://www.flickr.com/photos/dragontomato/3050561189- http://www.flickr.com/photos/dragontomato/3050561189

5. There are many!There are many!
Image credit:Image credit: James Lee (jronaldlee)James Lee (jronaldlee) - http://www.flickr.com/photos/jronaldlee/7033839441- http://www.flickr.com/photos/jronaldlee/7033839441

6. Image source:Image source: AmazonAmazon - http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612- http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612

7. MVCMVC
Image credit:Image credit: Helen (afeitar)Helen (afeitar) - http://www.flickr.com/photos/afeitar/8039909030- http://www.flickr.com/photos/afeitar/8039909030

8. - M
- V
- C

9. - Model
- V
- C

10. - Model
- View
- C

11. - Model
- View
- Controller

12. - Business
- Presentation
- Mediation

13. - Business
- Presentation
- Mediation

14. - Business
- Presentation
- Mediation
“ separation of concerns ”

15. Neither layer . . .

16. Neither layer . . .
- wants to know

17. Neither layer . . .
- wants to know
- should know

18. Neither layer . . .
- wants to know
- should know
- or can know

19. Neither layer . . .
- wants to know
- should know
- or can know
about the other

20. Front ControllerFront Controller
Image credit:Image credit: Zrendavir_ (zrendavir)Zrendavir_ (zrendavir) - http://www.flickr.com/photos/zrendavir/3074941476- http://www.flickr.com/photos/zrendavir/3074941476

21. Single Point of Entry

22. Single Point of Entry
Obvious Jokes Omitted

24. Template MethodTemplate Method
Image credit:Image credit: Phil and Pam Gradwell (philandpam)Phil and Pam Gradwell (philandpam) - http://www.flickr.com/photos/philandpam/2195674013- http://www.flickr.com/photos/philandpam/2195674013

25. Override steps
Of a process

26. Without Modifying
The Process

27. “ Hooks “

29. FactoryFactory
Image credit:Image credit: Philippe Du Berger (DubyDub2009)Philippe Du Berger (DubyDub2009) - http://www.flickr.com/photos/urbexplo/4360787743- http://www.flickr.com/photos/urbexplo/4360787743

30. Create an Object
Without exposing
Instantiation logic

31. Animal

32. Animal
Cat

33. Animal Dog
Cat

34. Animal Dog
Cat
Moose

35. Animal Factory

36. Create ( 'dog' )

39. UtilityUtility
Image credit:Image credit: Kiran Foster (rueful)Kiran Foster (rueful) - http://www.flickr.com/photos/rueful/5697846897- http://www.flickr.com/photos/rueful/5697846897

40. Don't Require
Instantiation

41. Static

43. Active RecordActive Record
Image credit:Image credit: Marcin Wichary (mwichary)Marcin Wichary (mwichary) - http://www.flickr.com/photos/mwichary/2481681915- http://www.flickr.com/photos/mwichary/2481681915

44. ORM

45. ORM
Object Relational Mapping

46. Database Row = Object

47. Array

48. CRUD

49. CRUD
Create, Read, Update, Delete

51. DecoratorDecorator
Image credit:Image credit: U.S. Army Corps of Engineers (usacehq)U.S. Army Corps of Engineers (usacehq) - http://www.flickr.com/photos/usacehq/8723898265- http://www.flickr.com/photos/usacehq/8723898265

52. Add Behaviors
To an Object

53. Without Modifying
Other Instances

54. “ MIXIN “ OR “ TRAIT “

56. SingletonSingleton
Image credit:Image credit: Kevin Jones (kj-an)Kevin Jones (kj-an) - http://www.flickr.com/photos/kj-an/2294604279- http://www.flickr.com/photos/kj-an/2294604279

57. There can only be one

58. Only Allow a
Single Instance

61. StrategyStrategy
Image credit:Image credit: Lucas Arts/Walt DisneyLucas Arts/Walt Disney

62. Change a Process
Based on Criteria

63. Common Interface
Variable process

65. AdaptorAdaptor
Image credit:Image credit: gwire (gwire)gwire (gwire) - http://www.flickr.com/photos/gwire/336458831- http://www.flickr.com/photos/gwire/336458831

66. Adapts an Interface

67. Normalization

68. “ Wrapper ”

70. ObserverObserver
Image credit:Image credit: nociveglia (gwire)nociveglia (gwire) - http://www.flickr.com/photos/40385177@N07/4256525264- http://www.flickr.com/photos/40385177@N07/4256525264

71. Notifications

72. State Change

73. Event Driven