apidays Paris 2022 - Agile API delivery with Feature Toggles, Rafik Ferroukh, Allianz Technology

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December 14, 15 & 16, 2022

Agile API delivery with Feature Toggles
Rafik Ferroukh, Software Architect at Allianz Technology
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Transcript

1. © Allianz 2021
   Agile API delivery
   with Features Toggles
   Rafik FERROUKH
   rafik.ferroukh@allianz.fr
   API DAYS
   Paris,
   December 2022
   

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2. Whoami
   •
   •
   •
   •
   •
   •
   ferrouk@allianz.fr
   

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3. 2023 SERIES OF EVENT
   New York
   May 16&17
   Australia
   October 11&12
   Singapore
   April 12&13
   Helsinki & North
   June 5&6
   Paris
   SEPTEMBER
   London
   November
   15&16
   June 28-30
   SILICON VALLEY
   March 14&15
   Dubai & Middle East
   February 22&23
   

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4. 3
   We develop the
   product current
   version
   One important
   feature is not
   completed…!
   Dear customer…
   Sent…
   

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5. 4
   New version
   delivered on
   production !
   A few hours later…
   Blocker bug
   detected on
   Feature
   

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6. Product journey features
   CONTEXT
   5
   PRICING QUOTE CONTRACT
   GUARANTEES CLAUSES DUPLICATION
   NOT YET IN PRODUCTION ALREADY IN PRODUCTION
   

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7. Product features focus
   CONTEXT
   6
   PRICING QUOTE CONTRACT
   GUARANTEES CLAUSES DUPLICATION
   NOT YET IN PRODUCTION ALREADY IN PRODUCTION
   UNFINISHED
   GENERATE
   BLOCKER BUG
   

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8. Alert! How should i handle?
   CONTEXT
   7
   Not yet finished but must
   be delivered with the same
   delivery package
   if(NotProd()) {
   // "Clauses" feature code
   }
   Clauses
   

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9. Alert! How should i handle? #2
   CONTEXT
   8
   Delivered but generates
   blocker bug in production!
   CODE BUILD TEST RELEASE DEPLOY
   if(NotProd()) {
   // « Duplication » code
   }
   Duplication
   

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10. Feature Branches?
    FEATURE BRANCHES
    9
    A Feature Branch is a branch that contains one feature
    code
    https://nvie.com/posts/a-successful-git-branching-model/
    

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11. Limits
    FEATURE BRANCHES
    10
    MERGE
    CONFLICTS
    Feature branches without Toggles
    https://launchdarkly.com/blog/feature-branching-using-feature-flags/
    Feature A
    Clauses
    Feature B
    Duplication
    

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12. 11
    My coworker's reaction when their
    pull-request finally gets merged after
    a particularly long, intense code
    review
    My first attempt to merge a long-lived
    branch with master branch
    https://devhumor.com/
    

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13. Limits
    FEATURE BRANCHES
    12
    ONLY 1 TEST
    ENVIRONMENT
    MERGE
    CONFLICTS
    RISK
    OF DELAY
    NO UNFINISHED
    FEATURE TO
    DEPLOY
    Feature branches without Toggles
    https://launchdarkly.com/blog/feature-branching-using-feature-flags/
    Feature A
    Clauses
    Feature B
    Duplication
    

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14. Big cons
    CONTEXT
    13
    HARDED
    CODE
    REBUILD
    REDEPLOY
    MULTIPLICITY TIME/COST
    

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15. How can resolve?
    CONTEXT
    14
    Continuous
    delivery?
    Costs?
    Changes
    management?
    Time?
    Customer
    First
    Quality?
    

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16. Feature Toggle?
    FEATURE TOGGLES
    15
    Feature Toggle is a way to enable or disable a feature on the fly
    without coding, rebuild and redeploy
    Feature Toggles (often also refered to as Feature Flags) are a
    powerful technique, allowing teams to modify system behavior
    without changing code.
    Martin Fowler
    https://willmendesneto.com/posts/automating-launchdarkly-feature-flags-cleanup-in-your-codebase/
    

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17. How?
    FEATURE TOGGLES
    16
    SAME TEST
    ENVIRONMENT
    NO MERGE
    CONFLICTS
    MINIMIZE RISK
    OF DELAY
    UNFINISHED
    FEATURE CAN BE
    DEPLOYED
    Feature branches with Toggles
    https://launchdarkly.com/blog/feature-branching-using-feature-flags/
    Feature A
    Clauses
    Feature B
    Duplication
    

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18. Categories
    FEATURE TOGGLES
    17
    https://www.martinfowler.com/articles/feature-toggles.html
    https://www.flagship.io/feature-toggle-best-practices/
    https://devblogs.microsoft.com/devops/effective-patterns-for-
    feature-flags/
    Release Toggles allow incomplete and
    un-tested codepaths to be shipped to
    production as latent code which may
    never be turned on.
    Experiment Toggles are used to
    perform multivariate or A/B testing
    We might introduce an Ops Toggle
    when rolling out a new feature which
    has unclear performance implications
    so that system operators can disable or
    degrade that feature quickly in
    production if needed
    Permissioning Toggles are used to
    change the features or product
    experience that certain users receive
    Pete Hodgson
    

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19. Framework solutions
    FEATURE TOGGLES
    18
    Flaggr
    Togglz
    Spring
    Flags
    FF4J
    angular-feature-flags
    rollout.io
    

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20. On my Product – Software architecture
    SOLUTIONS - FEATURE TOGGLES
    19
    Feature
    Toggles
    API
    Business
    API
    Frontend
    App
    System
    Team
    

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21. Take Away
    TAKE AWAY
    20
    FASTER DEVELOPMENT
    CONTINUOUS DELIVERY
    TIMEBOX RESPECT
    HIGHER AVAILABILITY
    COMPLEX TEST STRATEGY
    WHAT TO TOGGLE ?
    REFACTO ENABLERS TO PLAN
    INTRUSIVE CODE
    

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22. 21
    1. Footnote lorem ipsum dolor sit amet, Consectetuer adipescing elit, sed diam Nonummy
    

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23. Next steps at Allianz
    NEXT STEPS
    22
    MIGRATION
    SSO
    ADMIN UI
    SHARING CANARY
    RELEASE
    

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24. Thank you !
    23
    

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25. On my Product ➔ Togglz?
    FEATURE TOGGLES
    24
    Feature Toggles solution
    implementation for Java
    Admin UI Additional options
    (Canary Release, IP, etc…)
    Integrable via SpringBoot
    https://www.togglz.org/
    

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26. Go further
    EXTRA
    25
    Tests A/B
    Canary Release Feature performance
    https://modern-ti.com/2021/10/17/devops-feature-flags-canary-release-blue-green-
    deployment-etc-quelle-technique-adopter-pour-repondre-aux-defis-du-deploiement-continu/
    

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27. Again further
    EXTRA
    26
    Custom product
    management
    https://codeahoy.com/2021/02/27/feature-flags/
    

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28. Again further
    EXTRA
    27
    Management of
    premium features
    https://devblogs.microsoft.com/devops/effective-patterns-for-feature-flags/
    

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