Reclaim your architecture @ sbonrails

The slides of my February 12, 2014 talk at Santa Barbara on Rails

Transcript

1. Reclaim your architecture
   Stephan Hagemann
   

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2. Rails developers?
   

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3. STEPHAN
   GERMAN
   GERMANY
   BOULDER
   ROCK CLIMBING
   WHITE
   MALE
   NETHERLANDS
   CYCLING
   DIVING
   CONSULTANT
   RUBY
   RAILS GO
   XING
   PIVOTAL LABS
   

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6. Labeling in Software
   development
   

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7. No
   Rails app
   starts with a namespace
   

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8. All
   gems
   start with a namespace
   

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9. Rails Gems
   

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10. AEH FACE
    Rails Gems
    

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11. !
    !
    !
    !
    !
    !
    !
    !
    !
    + active record
    
    + active support
    
    + action controller
    
    Rails Gems
    

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12. How can you tell what
    still belongs?
    

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14. Try this!
    !
    Namespace everything
    in your next app
    

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15. Give yourself a box so
    you can start thinking
    outside of it
    

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16. Can you
    prove small
    chunks?
    

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17. Growing size
    

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18. Exploding complexity
    SIZE
    POSSIBLE
    INTERACTIONS
    

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19. Effect of structure
    VS
    

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20. SIZE
    POSSIBLE
    INTERACTIONS
    Reduced exploding
    complexity
    

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21. Slashing complexity
    SIZE
    COMPLEXITY
    SPLIT!
    

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22. Making chunks early
    SIZE
    COMPLEXITY
    SPLIT!
    

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23. Net win?
    SIZE
    COMPLEXITY
    SPLIT!
    $
    $
    

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24. You’re going to do it
    often
    SIZE
    DOUBLE
    SPLIT!
    COMPLEXITY
    NEW CODE

    IN ENGINE
    NEW CODE

    IN ENGINE
    

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25. Never build large apps
    to build large apps
    

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26. github.com/shageman/
    the_next_big_thing
    

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27. 5 looser coupling
    3 gems
    1 one app
    4 engines
    8 HTTP SOA
    2 modules
    7 eco-system
    6 services
    

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28. 1
    The one app
    

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29. HTTP://WWW.FLICKR.COM/PHOTOS/WIDNR/6589525327/
    

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30. Examples
    !
    diaspora, CF CC,
    canvas
    

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31. If you are in the situation
    where you’re reading some
    text, investigating, trying to
    figure out what is going on...
    That is a very good property
    of a detective novel and a
    very bad property of code.
    !
    Martin Fowler
    

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32. ANNOYANCE
    ENTRY
    STRUCTURE
    

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33. 2
    The modularized app
    

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34. HTTP://EECUE.COM/P/31426/METAL-RECYCLING-YARD.HTML
    

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35. +
    A higher level structure
    

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36. ANNOYANCE
    EMAIL
    SIGNUP
    STRUCTURE
    

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37. 3
    The gem component app
    

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39. +
    Provable independence
    

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40. Choose modules that tell
    the story of the system
    and contain a cohesive
    set of concepts
    Eric Evans
    

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42. HTTP://WWW.SMASHINGMAGAZINE.COM/INFORMATION-AND-INSTRUCTIONAL-SIGNS-PART-1/
    

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43. ANNOYANCE
    EMAIL
    SIGNUP
    STRUCTURE
    

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44. 4
    The Rails component app
    

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46. +
    Provable independence for
    Rails
    

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47. Rails Engines
    

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48. EMAIL
    SIGNUP
    TEASER
    STRUCTURE
    ANNOYANCE
    

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49. 5
    The loosely-coupled app
    

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51. +
    Clearer responsibilities
    

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52. EMAIL
    SIGNUP
    TEASER
    STRUCTURE
    ANNOYANCE
    EVENT
    COUNTER
    

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53. 6
    The service-oriented app
    

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55. +
    Reduced surface area
    

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56. 588 194
    LOGGER::COUNT
    EVENTCOUNTER::*.METHODS.COUNT
    LOGGER
    361 115
    

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57. 588 194
    LOGGER::COUNT
    EVENTCOUNTER::*.METHODS.COUNT
    LOGGER
    361 115
    - OBJECT.METHODS
    LOGGER::COUNT LOGGER
    394 0
    247 1
    

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58. EMAIL
    SIGNUP
    TEASER
    STRUCTURE
    ANNOYANCE
    EVENT
    COUNTER
    

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59. 7
    The eco-system app
    

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61. gem build event_counter..
    

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62. gem push event_counter..
    

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64. EMAIL
    SIGNUP
    TEASER
    STRUCTURE
    ANNOYANCE
    EVENT
    COUNTER
    

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65. 8
    The HTTP SOA app
    

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66. PICTURE HERE
    

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67. STRUCTURE
    EMAIL
    SIGNUP
    TEASER
    ANNOYANCE
    EVENT COUNTER
    

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68. 5 looser coupling
    3 gems
    1 one app
    4 engines
    8 HTTP SOA
    2 modules
    7 eco-system
    6 services
    

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69. 5 looser coupling
    3 gems
    1 one app
    4 engines
    8 HTTP SOA
    2 modules
    7 eco-system
    6 services
    

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70. 9
    Architecture the reclaimed
    years
    

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72. HTTP://WWW.CONFREAKS.COM/VIDEOS/759-RUBYMIDWEST2011-KEYNOTE-
    ARCHITECTURE-THE-LOST-YEARS
    

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77. well, we just did that
    

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78. EMAIL
    SIGNUP
    TEASER
    STRUCTURE
    ANNOYANCE
    EVENT
    COUNTER
    

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79. Thanks!
    Stephan Hagemann
    @shageman
    stephan@pivotallabs.com
    

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