<https www youtube com watch v=aW1iR0Mmitk|Design Patterns in Kotlin Proxy and Decorator>

Hi < xxfast> Using extension functions is a fine approach as well slightly smiling face

<https www youtube com watch v=aW1iR0Mmitk|Design Patterns i kotlinlang #feed

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Title

xxfast

08/18/2022, 4:44 PM

Design Patterns in Kotlin: Proxy and Decorator▾

Design pattern need not apply? Decorator/Proxy often introduce unnecessary wrapping and types

val processor = LoginProcessor(
  Logger,
  CacheProcessor(
    Cache,
    RequestProcessor()
  )
)

We can achieve the same effect without introducing these wrappers/types by simply using extension functions

val processor = Processor()
  .log(Logger)
  .cache(Cache)

thoughts? @Alexey Soshin

Alexey Soshin

08/18/2022, 7:57 PM

Hi @xxfast, Using extension functions is a fine approach as well 🙂

xxfast

08/18/2022, 10:55 PM

The pattern really breaks down and we are just left with extension functions 😅 only remaining vestigial is the names decorator and proxy Anyways, great work with the video 👍 really made me rethink this whole pattern for my presentation

phldavies

08/19/2022, 11:47 AM

https://pl.kotl.in/t4R0DRmls same idea but with only interfaces and extensions

xxfast

08/19/2022, 12:26 PM

Funny how we both came to the same solution without the decorator pattern 😅

phldavies

08/19/2022, 12:30 PM

You could argue it’s still the decorate pattern, but without explicit types 😉

xxfast

08/19/2022, 2:02 PM

no wrapping though - which is good. This no longer resembles the original pattern from the GoF, therefore it is not decorator

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