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kotlinlang

How do replace kotlinx.serialization with jackson again?

i read in the docs "if Jackson is needed configure `KotlinSerializationJsonMessageConverter` manually." but i dont get what this means

<@U0BUH9FRD> can you hint me to a solution :pray:

ok finally managed to remove kotlinx from our WebClients. but tbh: i want ktolinx.serialization NOWHERE where jackson was used before. is there a way to configure this in one place?

In latest versions this quote is for RSocket only I think <https://docs.spring.io/spring-framework/docs/current/reference/html/languages.html#kotlin-multiplatform-serialization>.

&gt; i want ktolinx.serialization NOWHERE where jackson was used before
I am not sure to understand, you have kotlinx.serialization in the lcasspath but don't want it to be configured or used by WebClient ?

correct. not in webclient, not in web controllers, no where

If you wan't that behavior I think you will have to customize codec and converter configuration accordingly. But I am curious about your use case, could you share more?

I am asking since kotlinx.serialization mainly targets `@Serializable` classes which should not be an issue for most use cases.

Collection of primitive types may end up to be processed as well before Jackson, is that your issue?

well today we ran into an issue in the line
```.body(Mono.just(data), Set::class.java)```
(which inserts the body into a POST requests)
after updateting to spring boot 2.4 (or 2.4.1) it threw
because kotlinx couldnt; find a Polymorphic serializer for Set, or EmptySet or...

Could be a bug, could you please share a repro project?

unfortunately its a customer project :disappointed:

Sure but I mean extract the use case in a simple repro.

FYI I can probably fix this but I need an issue with a repro.