I am altering the deal

Imagine your legacy production Ruby application is highly dependent on a third-party API — until you learn your vendor deprecates your current connection. What do you do when you’re forced to make a change? Accept the challenge by embracing abstractions, switching libraries, feature flags, edge-case testing while developing new features. Game on.

Focuses on: Famous example of third-party dependencies that have broken application; Abstracting the API interaction; Utilizing Ruby switching libraries; Feature flagging; Testing for edge cases (QA & customer service); and much more!

Transcript

1. I AM ALTERING THE DEAL
   (PRAY I DON’T ALTER IT FURTHER)
   Brittany Martin
   parisRB 2020
   Brittany Martin @BrittJMartin
   

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2. Brittany Martin
   Lead Web Developer @ Pittsburgh Cultural Trust
   Brittany Martin @BrittJMartin
   

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3. Host
   5 B Y 5 R U B Y O N R A I L S
   P O D C A S T
   Brittany Martin @BrittJMartin
   

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4. Norma Skates
   L I T T L E S T E E L D E R B Y
   G I R L S
   Brittany Martin @BrittJMartin
   

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5. THE DEAL
   Brittany Martin @BrittJMartin
   

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6. 3rd Party
   Dependencies
   C R E D I T :
   M e d i a c l i p
   Brittany Martin @BrittJMartin
   

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7. Do they
   always
   behave?
   C R E D I T :
   T H E F O U N D
   Brittany Martin @BrittJMartin
   

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8. C R E D I T :
   H i C l i p a r t
   S T R AT E G Y
   Brittany Martin @BrittJMartin
   

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9. Avoid
   Catastrophe!
   Brittany Martin @BrittJMartin
   

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10. Strong Customer
    Authentication
    C R E D I T :
    P Y M N T S . C O M
    Brittany Martin @BrittJMartin
    

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11. Payments Intent
    C R E D I T :
    M O L p a y
    Brittany Martin @BrittJMartin
    

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12. I N S TAG R A M
    C R E D I T :
    S e a r c h E n g i n e
    J o u r n a l
    Brittany Martin @BrittJMartin
    

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13. Graph
    API
    C R E D I T :
    S a n i t y
    Brittany Martin @BrittJMartin
    

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14. Brittany Martin @BrittJMartin
    

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15. Brittany Martin @BrittJMartin
    

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16. Brittany Martin @BrittJMartin
    

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17. Rollback
    Hell
    C R E D I T :
    D e p l o y B o t
    Brittany Martin @BrittJMartin
    

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18. C R E D I T :
    S t a r W a r s
    Brittany Martin @BrittJMartin
    

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19. C R E D I T :
    A t l a s s i a n
    Brittany Martin @BrittJMartin
    

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20. AutomateTesting
    C R E D I T :
    C h a r u d e a l
    Brittany Martin @BrittJMartin
    

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21. Beauty in
    Testing
    Brittany Martin @BrittJMartin
    

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22. Performance
    C R E D I T :
    A b d u l R a h m a n
    Brittany Martin @BrittJMartin
    

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23. P E R F T E S T
    Brittany Martin @BrittJMartin
    

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24. LOAD
    TESTING
    Brittany Martin @BrittJMartin
    C R E D I T :
    P i x a b a y
    

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25. Perform. C R E D I T :
    P i x a b a y
    Brittany Martin @BrittJMartin
    

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26. Ruby
    Community
    C R E D I T :
    J o n n y L e w
    Brittany Martin @BrittJMartin
    

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27. Benchmark
    VCR
    Scientist
    Brittany Martin @BrittJMartin
    

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28. C R E D I T :
    G i t h u b , P i x a b a y
    Branch by Abstraction
    Brittany Martin @BrittJMartin
    

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29. Scientist
    G ITHU B
    C R E D I T :
    P i x a b a y
    Brittany Martin @BrittJMartin
    

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30. C R E D I T :
    G i t h u b
    Brittany Martin @BrittJMartin
    

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31. require "scientist"
    class MyWidget
    def allows?(user)
    experiment = Scientist::Default.new "widget-
    permissions"
    experiment.use { model.check_user?
    (user).valid? } # old way
    experiment.try { user.can?(:read, model) } # new
    way
    experiment.run
    end
    end
    C R E D I T :
    G i t h u b
    Brittany Martin @BrittJMartin
    

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32. VCR
    C R E D I T :
    B B C
    Brittany Martin @BrittJMartin
    

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33. C R E D I T :
    T e e P u b l i c
    Brittany Martin @BrittJMartin
    

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34. require 'rubygems'
    require 'test/unit'
    require 'vcr'
    VCR.configure do |config|
    config.cassette_library_dir = "fixtures/vcr_cassettes"
    config.hook_into :webmock
    end
    class VCRTest < Test::Unit::TestCase
    def test_example_dot_com
    VCR.use_cassette("synopsis") do
    response = Net::HTTP.get_response(URI('brittanymartin.dev"))
    assert
    end
    end
    end
    Brittany Martin @BrittJMartin
    

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35. B E N C H M A R K
    C R E D I T :
    S p r o u t S o c i a l
    Brittany Martin @BrittJMartin
    

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36. SOAP vs.Rest
    Brittany Martin @BrittJMartin
    Benchmark.bmbm(100) do |x|
    x.report("SOAP") { n.times do
    Webservices::Requests::GetNewSessionKeyRequest.new({:ip =>
    '0.0.0.0'}).invoke.session_key
    end }
    x.report("REST") { n.times do
    Rest.new.create_session('0.0.0.0')['SessionKey']
    end}
    end
    APIs called 100x each.
    Benchmark::Tms:0x00007ff17de18270 @label="SOAP", @real=3.547331999987364,
    @cstime=0.0, @cutime=0.0, @stime=0.09988699999999984, @utime=1.6087319999999998,
    @total=1.7086189999999997
    Benchmark::Tms:0x00007ff17f596f50 @label="REST", @real=26.420482000001357,
    @cstime=0.0, @cutime=0.0, @stime=0.17270999999999992, @utime=1.5042220000000004,
    @total=1.6769320000000003
    SOAP real-time = 3.547331999987364
    REST real-time = 26.420482000001357
    SOAP is 8x faster.
    

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37. Brittany Martin @BrittJMartin
    

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38. C R E D I T :
    C o l l i s
    Brittany Martin @BrittJMartin
    

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39. Silver
    Linings.
    C R E D I T :
    4 D H u m a n B e i n g
    Brittany Martin @BrittJMartin
    

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40. C R E D I T :
    N Y T i m e s
    Brittany Martin @BrittJMartin
    

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41. B R E A K U P
    C R E D I T :
    V e r a A r s i c
    Brittany Martin @BrittJMartin
    

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42. Be Strong
    A V O I D N E G A T I V I T Y
    Brittany Martin @BrittJMartin
    

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43. C R E D I T :
    T e s T e a c h
    Brittany Martin @BrittJMartin
    

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44. brittanymartin.dev
    5by5.tv/rubyonrails
    Please lunch with me!
    Brittany Martin @BrittJMartin
    

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