Django Apps to Services

Transcript

1. Django Apps to Services

2. Craig Kerstiens @craigkerstiens work at @heroku

3. Project A collection of configuration and apps for a particular

   Website. (per Django Project) Django

4. Project App A collection of configuration and apps for a

   particular Website. (per Django Project) Django

5. Project App A collection of configuration and apps for a

   particular Website. A web application that does something. I.e. Weblog, Poll, Ticket system (per Django Project) Django

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   Table Table Table Table Table Table Table Table Table Table Table App

9. Within Django

10. Project Within Django

11. Project App App App Within Django

12. Project App App App Tickets FAQ FaqCreator Within Django

13. Project App App App Tickets FAQ FaqCreator Within Django cd

    myproject && find . manage.py requirements.txt settings.py urls.py ./faq/admin.py ./faq/forms.py ./faq/models.py ./faq/urls.py ./faq/views.py ./faqcreator/admin.py ./faqcreator/forms.py ./faqcreator/models.py ./faqcreator/urls.py ./faqcreator/views.py ./tickets/admin.py ./tickets/forms.py ./tickets/models.py ./tickets/urls.py ./tickets/views.py

14. Reusability

15. cd myproject && find . Reusability

16. cd myproject && find . manage.py requirements.txt settings.py urls.py ./faq/admin.py

    ./faq/forms.py ./faq/models.py ./faq/urls.py ./faq/views.py ./faqcreator/admin.py ./faqcreator/forms.py ./faqcreator/models.py ./faqcreator/urls.py ./faqcreator/views.py ./tickets/admin.py ./tickets/forms.py ./tickets/models.py ./tickets/urls.py ./tickets/views.py Reusability

17. cd myproject && find . cd myproject && find .

    manage.py requirements.txt settings.py urls.py ./faq/admin.py ./faq/forms.py ./faq/models.py ./faq/urls.py ./faq/views.py ./faqcreator/admin.py ./faqcreator/forms.py ./faqcreator/models.py ./faqcreator/urls.py ./faqcreator/views.py ./tickets/admin.py ./tickets/forms.py ./tickets/models.py ./tickets/urls.py ./tickets/views.py --> Reusability

18. cd myproject && find . manage.py requirements.txt settings.py urls.py cd

    myproject && find . manage.py requirements.txt settings.py urls.py ./faq/admin.py ./faq/forms.py ./faq/models.py ./faq/urls.py ./faq/views.py ./faqcreator/admin.py ./faqcreator/forms.py ./faqcreator/models.py ./faqcreator/urls.py ./faqcreator/views.py ./tickets/admin.py ./tickets/forms.py ./tickets/models.py ./tickets/urls.py ./tickets/views.py --> Reusability

19. cd myproject && find . manage.py requirements.txt settings.py urls.py cat

    myproject/requirements.txt cd myproject && find . manage.py requirements.txt settings.py urls.py ./faq/admin.py ./faq/forms.py ./faq/models.py ./faq/urls.py ./faq/views.py ./faqcreator/admin.py ./faqcreator/forms.py ./faqcreator/models.py ./faqcreator/urls.py ./faqcreator/views.py ./tickets/admin.py ./tickets/forms.py ./tickets/models.py ./tickets/urls.py ./tickets/views.py --> Reusability

20. cd myproject && find . manage.py requirements.txt settings.py urls.py cat

    myproject/requirements.txt faq==0.1 faqcreator==0.1 tickets==0.1 cd myproject && find . manage.py requirements.txt settings.py urls.py ./faq/admin.py ./faq/forms.py ./faq/models.py ./faq/urls.py ./faq/views.py ./faqcreator/admin.py ./faqcreator/forms.py ./faqcreator/models.py ./faqcreator/urls.py ./faqcreator/views.py ./tickets/admin.py ./tickets/forms.py ./tickets/models.py ./tickets/urls.py ./tickets/views.py --> Reusability
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22. REUSABILITY means faster features due to DRY (Don’t Repeat Yourself)

23. REUSABILITY means faster features due to DRY (Don’t Repeat Yourself)

    REUSABILITY does not always mean SCALABILITY or MAINTAINABILITY

24. REUSABILITY means faster features due to DRY (Don’t Repeat Yourself)

    REUSABILITY does not always mean SCALABILITY or MAINTAINABILITY

25. Project App A collection of configuration and apps for a

    particular Website. A web application that does something. I.e. Weblog, Poll, Ticket system (per Django Project) Django

26. Project App A collection of configuration and apps for a

    particular Website. A web application that does something. I.e. Weblog, Poll, Ticket system (per Django Project) Django

27. Project App A collection of configuration and apps for a

    particular Website. A web application that does something. I.e. Weblog, Poll, Ticket system Django Service Method of communication over the web. Web APIs allow combination of multiple services
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29. Tech imitate Teams Project App App App Tickets FAQ FaqCreator

    Company Support Knowledge Base

30. Support Knowledge Base Teams

31. App App Support Knowledge Base Teams Grow

32. App App Support Knowledge Base Billing Teams Grow

33. App App Support Knowledge Base Billing Marketing Teams Grow

34. App App Support Knowledge Base Billing Marketing Analytics Mobile API

    Front End Social Teams Grow

35. App App App Support Knowledge Base Billing Apps Grow Marketing

    Analytics Mobile API Front End Social 3 Apps

36. App App App Support Knowledge Base Billing Apps Grow App

    App App Marketing Analytics Mobile App App App API Front End Social 9 Apps

37. Support Knowledge Base Billing Apps Grow Marketing Analytics Mobile API

    Front End Social 9 Apps 1 Codebase

38. SOA To the Rescue

39. SOA To the Rescue

40. SOA To the Rescue

41. Defined contract for communicating Service

42. Defined contract for communicating Service $ curl -O $FAQ_API/create/ -X

    “question=my\ question source=123”

43. In Python

44. In Python data = { ‘question’: “my question”, ‘source’: 123

    } requests.POST(os.environ[‘FAQ_API’] + ‘/create/’, data=data)

45. Version Bump data = { ‘question’: “my question”, ‘source’: 123,

    ‘related’: [456, 789] } requests.POST(os.environ[‘FAQ_API’] + ‘/v2/create’, data=data)

46. Version Bump data = { ‘question’: “my question”, ‘source’: 123,

    ‘related’: [456, 789] } requests.POST(os.environ[‘FAQ_API’] + ‘/v2/create’, data=data)

47. Version Bump data = { ‘question’: “my question”, ‘source’: 123,

    ‘related’: [456, 789] } requests.POST(os.environ[‘FAQ_API’] + ‘/v2/create’, data=data) STILL VALID requests.POST(os.environ[‘FAQ_API’] + ‘/v1/create’, data=data)

48. What’s a service Provider API_HOST= http://127.0.0.1

49. What’s a service Provider Endpoint API_HOST= http://127.0.0.1 /v1/create/

50. What’s a service Provider Endpoint API_HOST= http://127.0.0.1 /v1/create/ Contract {

    ‘question’: ‘foo bar’, ‘source’: 123 }

51. Service App

52. Service App Models Views URLs Provider Endpoint Contract

53. A SERVICE means REUSABILITY and enables SCALABILITY and MAINTAINABILITY

54. A SERVICE means REUSABILITY and enables SCALABILITY and MAINTAINABILITY

55. In the real world

56. In the real world

57. In the real world Install Sentry

58. In the real world Install Sentry Send lots of data

59. In the real world Install Sentry Send lots of data

    ...........

60. In the real world Install Sentry Send lots of data

    ........... Crash sentry

61. In the real world Install Sentry Send lots of data

    ........... Crash sentry ...........

62. In the real world Install Sentry Send lots of data

    ........... Crash sentry ........... Scale sentry

63. In the real world Install Sentry Send lots of data

    ........... Crash sentry ........... Scale sentry ...........

64. In the real world Install Sentry Send lots of data

    ........... Crash sentry ........... Scale sentry ........... Some time later, scale the app you build

65. In the real world Install Sentry Send lots of data

    ........... Crash sentry ........... Scale sentry ........... Some time later, scale the app you build VS

66. In the real world Install Sentry Send lots of data

    ........... Crash sentry ........... Scale sentry ........... Some time later, scale the app you build Install Sentry VS

67. In the real world Install Sentry Send lots of data

    ........... Crash sentry ........... Scale sentry ........... Some time later, scale the app you build Install Sentry Send lots of data to Sentry Service VS

68. In the real world Install Sentry Send lots of data

    ........... Crash sentry ........... Scale sentry ........... Some time later, scale the app you build Install Sentry Send lots of data to Sentry Service Let David Cramer scale Sentry VS

69. App App App Support Knowledge Base Billing Where to Start

    App App App Marketing Analytics Mobile App App App API Front End Social

70. App App Support Knowledge Base Billing Where to Start App

    Marketing Analytics Mobile App API Front End Social
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79. Service App

80. Service App Models Views URLs Provider Endpoint Contract

81. Take aways

82. Take aways 1. Start non-critical (Cheat) 2. Create services where

    theres pain 3. Start small

83. Fin. Resources http://www.craigkerstiens.com http://bit.ly/djangoappstoservices http://www.12factor.net