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O U R S P O N S O R S

April 23th, 2024

Uniting Native SDKs into Kotlin Multiplatform

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An introduction to property based testing with Kotest

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Sponsors

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Housekeeping

http://kotlin.wien

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-XenableGarbageCollection

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News

  • Find us on LinkedIn�

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Community Interview

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1 Volunteer

7 easy Questions

Your favourite topic

In German or English

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Community Interview

Who are you in one sentence?

How long have you been working with Kotlin?

What are you working on (in Kotlin)?

How is Kotlin used in this project?

Tell us about a Kotlin win.

Tell us about a Kotlin fail.

Any problems/wins using Java Libraries?

Kotlin Frameworks / Features:

  • Arrow
  • AtomicFu
  • Coroutines
  • Exposed
  • Gradle DSL
  • HTML DSL
  • Kodein
  • KotlinX-IO
  • Kotlin Serialization
  • Ktor
  • Ktorm
  • MockK
  • TornadoFx

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Upcoming Schedule 2024

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May: Java Vienna Meetup - Venkat Edition! 6th May

May: KotlinConf 2024 Global Watchparty 23rd May� with Kotlin Vienna

June: Java Vienna Meetup: CDC w/ Debezium; 3rd June� Privacy leaks beyond the class-level

June: Kotlin Vienna Meetup: Arrow - upgrade � your funcy Kotlin! 11th June

August: Kotlin Vienna Stammtisch 20th August

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Contact us

If you have any questions or want to get in touch with us, you are more than welcome to do so!

Our contact information:

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meetup@kotlin.wien

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Uniting Native SDKs into KMP

Giancarlo Buenaflor

CONFIDENTIAL

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Create a KMP SDK

Native SDKs are available, so we can reuse them

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Java/Android SDK

Cocoa SDK

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expect/actual

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Use typealias

We can use expect/actual to define typealiases

Normal bridge

Implement the common code with standard bridge

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expect/actual typealias

Allows writing much less code

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Cons of expect/actual typealias

  • Signatures need to match - contains edge cases
  • Can be brittle, lead to runtime errors if not tested properly
  • Might not be possible to write idiomatic Kotlin
  • Needs to have the API exposed

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Bridge classes

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No need to create a new class for everything

Sometimes we only care about mutating state in the Native SDKs

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Pass data to native SDKs

  • We only care about mutating state
  • Saves time in synchronization of states between KMP and native layers

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Thank you!

Check out sentry-kotlin-multiplatform on

  • Sometimes you can pass data directly to the native SDKs
  • Using expect/actual typealiases can be useful in certain situations
  • Be prepared to write some boilerplate

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