Kotlin In the real world

- What you should know before starting a Kotlin project -

Android Makers Paris 2017

Transcript

1. By OCTO & The Refiners
   What you should be aware of before
   starting a Kotlin project
   Rémi Pradal
   Android Makers 2017
   K TLIN IN
   THE REAL
   WORLD
   

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2. Android developer discovering Kotlin – Circa 2015
   

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4. CAN I USE KOTLIN ON A
   LEGACY PROJECT?
   IS KOTLIN
   MATURE ENOUGH
   FOR A BIG PROJECT?
   MULTIPLE LANGUAGES MIX
   BEST PRACTICES?
   

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5. By OCTO & The Refiners
   Testability
   

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6. “Design and document for inheritance
   or else prohibit it”
   - Effective Java Item 17, Joshua Bloch
   

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7. KOTLIN DESIGN ENFORCES
   « FINAL BY DEFAULT »
   DESIGN
   How can I create my mock easily ?
   

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8. OPEN WHAT
   YOU NEED
   TO MOCK
   Introduces test
   related characteristics
   in production code
   OPEN ALL
   THE THINGS
   Useful for POKO
   used by a library
   Not specific to the
   test workspace
   USE
   INTERFACES
   Complies with the
   interface segregation
   principle
   Can add many
   boilerplate code
   

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9. By OCTO & The Refiners
   Code quality tooling
   

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11. By OCTO & The Refiners
    Interoperability
    

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12. Great Interoperability
    Usable today in a legacy project. But...
    

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13. COMPLEXIFY
    ONBOARDING
    DIFFERENT LANGUAGE
    PARADIGMS
    LANGUAGE
    MULTIPLICITY
    IN A PROJET
    MAY LEAD TO
    INTEROPERABILITY
    BOILERPLATE
    ISOLATE THE
    DIFFERENT CODE
    BASES PER FEATURE
    OR TECHNICAL
    LAYER
    

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14. By OCTO & The Refiners
    Language longevity
    

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15. KOTLIN IS NOT
    GOOGLE’S SWIFT
    

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16. TAKEAWAYS
    Embrace
    language’s
    design
    specificities
    Code quality
    tools are not
    as
    advanced
    as Java’s
    Try to keep
    your
    codebase
    coherent
    when mixing
    Java & Kotlin
    Remember
    you are not
    using
    Android’s
    official
    language
    

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