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Isomorphic Kotlin
- 1. Isomorphic Kotlin Wired or Tired? Ben Snider Columbus Code Camp
- 3. Sharing Kotlin code has never been easier™
- 4. #Goals • The power of Kotlin • Common term d’art • Inspiration!
- 5. Isomorphism? • What even is Kotlin? • What is Isomorphism? • What does it mean in Kotlin?
- 6. Kotlin • Typed • Nullability • Not Java™ • Expressive • Evolving • Modern • Popular
- 7. Isomorphism Derived from the Greek iso, meaning "equal" and morphosis, meaning "to form" or "to shape”. Weisstein, Eric W. "Isomorphism." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/Isomorphism.html
- 8. Common Isomorphism • React • Server Side Rendering
- 9. Isomorphism cont. • Shared Code • Cross Platform • Common Tooling
- 10. Story Time
- 11. Team One aka Team Island
- 12. One stack per platform Language, frameworks, deployments, etc.
- 13. Everyone’s on their own Island 🏝
- 14. Message passing through bottles
- 15. Great mastery of each stack, but…
- 16. They can’t all speak the same language
- 17. We might also call this Team Enterprise Not that Enterprise (or… that other Enterprise)
- 18. Team Two aka Team Kotlin! (yeah!)
- 19. All platforms are standardized, as much as possible* Language, frameworks, deployments, etc.
- 20. People can work together! 👫👬👭 *Actual team photo
- 21. Code-based contracts between tiers Negotiated and iterated on through code
- 22. Deep knowledge of one or two platforms Broad knowledge across the entire solution
- 23. This team might ship less (probably not) What it does ship has fewer issues and is deployed more smoothly Photo by ymvf / CC BY
- 24. We might also call this Team Startup (not that startup)
- 25. With that in mind… let’s get into the particulars for Kotlin
- 26. Point One Kotlin does support the most common meaning of isomorphism… but it’s fairly primitive.
- 27. Point Two Kotlin does support various modes of code sharing
- 28. Point Three Kotlin is Awesome!
- 29. Changing Gears Code Sharing Generalities
- 30. Characterizing Techniques • Gauge the level of • Reuse • Platform Idioms • Platform Knowledge
- 31. Three Types • One Language • Single and Multi platform • Shared Libraries • Server/Client
- 32. One Language to Rule them All (and in the darkness bind them) Photo by idreamlikecrazy / CC BY
- 33. One Language • One single language for all platforms • Some percentage of platform specific code
- 34. One Language Examples • Xamarin Native • React with Server Rendering, Node backend • .NET Core • C++ with Qt • React with React Native
- 35. One Language Reuse • Reuse: Medium • Platform Idioms: Low • Platform Knowledge: High
- 36. Shared Libraries
- 37. Shared Libraries • Between client platforms • Between client and server platforms • Shares critical logic and functionality
- 38. Shared Library Examples • Xamarin PCL Projects • C/C++ Frameworks (Unity, Android NDK, etc.) • J2Objc
- 39. Shared Library Reuse • Reuse: Medium • Platform Idioms: High • Platform Knowledge: High
- 40. Server/Client
- 41. Server/Client • Between client and server platforms • Can be the same language • Can be a different language
- 42. Server/Client Examples • JS Frontend and Node Backend • Android Frontend and Spring Backend • C Shared Library for • Android Frontend • Kotlin backend
- 43. TODO: redo as cross- platform • Reuse: Low • Platform Idioms: High • Platform Knowledge: High
- 44. Code Sharing Generalities • There’s no getting away from platform knowledge • One or more might make sense in a given project • No Silver Bullet™
- 45. Code Sharing with Kotlin
- 46. Kotlin on the JVM with Java Kotlin alongside Java Shared Library Server/Client
- 47. Kotlin on the JVM with Java • Examples • Reasonably common in Android • Any Java code that calls into Kotlin code
- 48. Kotlin to JavaScript Kotlin ➡ JS Transpilation Shared Library One Language Server/Client
- 49. Kotlin to JS Interop (Browser) • Runtime/stdlib JS library • ts2kt TypeScript typings ➡ Kotlin “headers” • kotlinx.html to render HTML
- 50. Kotlin to JS Interop (Node.js) • Runtime JS library on NPM • require to import JS modules • kotlinx.html to render HTML
- 51. Kotlin to Java+JS • Using Kotlin Multiplatform • Compile both JVM bytecode and JS • JVM on server, JS on client
- 52. Kotlin/Native All Kotlin all native One Language Shared Library
- 53. Kotlin/Native Interop • Two-way interop to native platforms • Creates frameworks and libraries • Consumes existing frameworks and libraries
- 54. Kotlin/Native Examples • JetBrains Spinner app • Shared library for Android and iOS • Native command line utility
- 55. Kotlin Multiplatform Real Cross Platform Projects One Language
- 57. Kotlin/Native and Multiplatform • Multiplatform projects use Kotlin/Native • Native executables for each platform • Multiplatform exposes Gradle plugins • Stitches modules and Native together
- 59. Multiplatform Examples • JetBrains KotlinConf app • Droidcon NYC app
- 60. Demo Time!
- 61. #Goals? • The power of Kotlin • Common term d’art • Inspiration!
- 62. Q&A