Django Apps to Services

Transcript

1. Django Apps to Services
   

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2. Craig Kerstiens
   @craigkerstiens work at @heroku
   

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3. Project A collection of configuration and apps for a particular Website.
   (per Django Project)
   Django
   

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4. Project
   App
   A collection of configuration and apps for a particular Website.
   (per Django Project)
   Django
   

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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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6. Table
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7. Table
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8. Table
   Table
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   Table Table
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   App
   

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9. Within Django
   

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10. Project
    Within Django
    

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11. Project
    App
    App
    App
    Within Django
    

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12. Project
    App
    App
    App
    Tickets
    FAQ
    FaqCreator
    Within Django
    

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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
    

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14. Reusability
    

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15. cd myproject && find .
    Reusability
    

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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
    

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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
    

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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
    

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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
    

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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)
    

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23. REUSABILITY means faster features due to DRY
    (Don’t Repeat Yourself)
    REUSABILITY does not always mean SCALABILITY
    or MAINTAINABILITY
    

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24. REUSABILITY means faster features due to DRY
    (Don’t Repeat Yourself)
    REUSABILITY does not always mean SCALABILITY
    or MAINTAINABILITY
    

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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
    

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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
    

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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
    

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30. Support
    Knowledge Base
    Teams
    

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31. App
    App
    Support
    Knowledge Base
    Teams Grow
    

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32. App
    App
    Support
    Knowledge Base
    Billing
    Teams Grow
    

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33. App
    App
    Support
    Knowledge Base
    Billing
    Marketing
    Teams Grow
    

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34. App
    App
    Support
    Knowledge Base
    Billing
    Marketing
    Analytics
    Mobile
    API
    Front End
    Social
    Teams Grow
    

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35. App
    App
    App
    Support
    Knowledge Base
    Billing
    Apps Grow
    Marketing
    Analytics
    Mobile
    API
    Front End
    Social
    3 Apps
    

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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
    

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37. Support
    Knowledge Base
    Billing
    Apps Grow
    Marketing
    Analytics
    Mobile
    API
    Front End
    Social
    9 Apps
    1 Codebase
    

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38. SOA To the Rescue
    

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39. SOA To the Rescue
    

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40. SOA To the Rescue
    

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41. Defined contract for communicating
    Service
    

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42. Defined contract for communicating
    Service
    $ curl -O $FAQ_API/create/ -X “question=my\ question source=123”
    

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43. In Python
    

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44. In Python
    data = {
    ‘question’: “my question”,
    ‘source’: 123
    }
    requests.POST(os.environ[‘FAQ_API’] + ‘/create/’, data=data)
    

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45. Version Bump
    data = {
    ‘question’: “my question”,
    ‘source’: 123,
    ‘related’: [456, 789]
    }
    requests.POST(os.environ[‘FAQ_API’] + ‘/v2/create’, data=data)
    

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46. Version Bump
    data = {
    ‘question’: “my question”,
    ‘source’: 123,
    ‘related’: [456, 789]
    }
    requests.POST(os.environ[‘FAQ_API’] + ‘/v2/create’, data=data)
    

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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)
    

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

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

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50. What’s a service
    Provider
    Endpoint
    API_HOST= http://127.0.0.1
    /v1/create/
    Contract {
    ‘question’: ‘foo bar’,
    ‘source’: 123
    }
    

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51. Service
    App
    

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52. Service
    App
    Models
    Views
    URLs
    Provider Endpoint Contract
    

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53. A SERVICE means REUSABILITY
    and enables SCALABILITY and
    MAINTAINABILITY
    

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54. A SERVICE means REUSABILITY
    and enables SCALABILITY and
    MAINTAINABILITY
    

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55. In the real world
    

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56. In the real world
    

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57. In the real world
    Install Sentry
    

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

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

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

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

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

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

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64. In the real world
    Install Sentry
    Send lots of data
    ...........
    Crash sentry
    ...........
    Scale sentry
    ...........
    Some time later, scale the app
    you build
    

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65. In the real world
    Install Sentry
    Send lots of data
    ...........
    Crash sentry
    ...........
    Scale sentry
    ...........
    Some time later, scale the app
    you build
    VS
    

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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
    

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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
    

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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
    

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69. App
    App
    App
    Support
    Knowledge Base
    Billing
    Where to Start
    App
    App
    App
    Marketing
    Analytics
    Mobile
    App
    App
    App
    API
    Front End
    Social
    

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70. App
    App
    Support
    Knowledge Base
    Billing
    Where to Start
    App
    Marketing
    Analytics
    Mobile App
    API
    Front End
    Social
    

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71. View Slide

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78. View Slide

79. Service
    App
    

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80. Service
    App
    Models
    Views
    URLs
    Provider Endpoint Contract
    

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81. Take aways
    

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

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

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