Hi I ve a problem trying to use OpenApi with moshi Kotshi At

Question

Hi I ve a problem trying to use OpenApi with moshi Kotshi At this line ```renderer = OpenApi3 apiInfo = ApiInfo Payment renderer service API 0 0 1 json = moshiLite apiRenderer = OpenApi3ApiRenderer moshiLite ``` I get the error Cannot access class org http4k format ConfigurableJackson Check your module classpath for missing or conflicting dependencies I indeed removed jackson from dependencies trying to use moshi kotshi The var moshiList is as follows ``` KotshiJsonAdapterFactory object ApplicationJsonAdapterFactory JsonAdapter Factory by KotshiApplicationJsonAdapterFactory val moshiLite = ConfigurableMoshi Moshi Builder add ApplicationJsonAdapterFactory add ListAdapter add MapAdapter asConfigurable withStandardMappings done ``` where could be the problem thanks in advance

dave · Answer

yep openAPI generation is not supported with anything other than Jackson at the moment

Nicola · Answer

ah i overlooked that but leaving it just for open api will be a performance penalty in aws lambda environment I mean Or will it be used when invoking the openapi endpoint only sorry for my english

Nicola · Answer

btw this project by Andrew <https github com oharaandrew314 http4k api on lambda> doesn t seem to include jackson at least I don t see it but it builds correctly

dave · Answer

Yes < Andrew O Hara> is using some magic to do the same thing WE hope to eventually push some of this stuff back into the library I wonder where it s referencing JSON then

Andrew O&apos;Hara · Answer

The `ConfigurableMoshi` via Kotshi is defined and it uses the same `AutomMarshalling` to generate the OpenAPI spec with the reflectionless `OpenApi3Renderer` As far as I can tell it is completely reflectionless

Nicola · Answer

I tried to do the same my code is above but there must be something different obviously

dave · Answer

I d try and work out where it s referencing the Jackson

dave · Answer

Is there a stack trace

Andrew O&apos;Hara · Answer

Kotshi doesn t have the best documentation but here s essentially what you need to do 1 Add the KSP plugin to your build gradle like ensure you re using the right plugin for your Kotlin version 2 Define a Kotshi adapter and reference the one built by the code generator like

Nicola · Answer

about 1 I am using jvm 11 and got a warning could be it the problem

Nicola · Answer

< dave> sorry I have deleted the openapi part to test the rest I will reproduce and paste the stack

Andrew O&apos;Hara · Answer

Ok looking back I can see you ve already done most of what I suggested so David s suggestion to look through the stacktrace or follow the debugger is going to be the best way to find out why Jackson is being used

dave · Answer

gt sorry I have deleted the openapi part to test the rest I will reproduce and paste the stack IntelliJ local history is very good btw slightly smiling face

Nicola · Answer

I get a compilation error not a stack trace actually

Nicola · Answer

Intellij in the Problems view says Cannot access class org http4k format ConfigurableJackson Check your module classpath for missing or conflicting dependencies

Nicola · Answer

In the tooltip IntelliJ show this public fun OpenApi3 apiInfo ApiInfo json Error type Unresolved type for org http4k format ConfigurableJackson extensions List lt OpenApiExtension gt servers List lt ApiServer gt version OpenApiVersion OpenApi3 lt Error type Unresolved type for com fasterxml jackson databind JsonNode

Nicola · Answer

It seems that my moshiLite is not visible

dave · Answer

you can try 2 things

dave · Answer

1 include jackson for compileOnly

dave · Answer

band aid

dave · Answer

2 try to call that function manually by passing all of the args

Nicola · Answer

ook

dave · Answer

Not sure why it s not working it shouldn t even reference the Jackson really

Nicola · Answer

maybe I have the wrong import If I navigate to the definition of OpenApi3 in my project I land to jacksonExt kt

Nicola · Answer

while in the Andrew s I land to OpenApi3

dave · Answer

ah you re calling the wrong overload

Nicola · Answer

ah but where cry

Nicola · Answer

my build gradle is this

Nicola · Answer

```buildscript repositories mavenCentral gradlePluginPortal plugins id org jetbrains kotlin jvm version $ kotlinVersion id com github johnrengelman shadow version 7 1 2 id com google devtools ksp version 1 8 10 1 0 9 apply plugin com github johnrengelman shadow apply plugin java repositories mavenCentral compileKotlin kotlinOptions jvmTarget = 11 compileTestKotlin kotlinOptions jvmTarget = 11 sourceCompatibility = JavaVersion VERSION 11 targetCompatibility = JavaVersion VERSION 11 test useJUnitPlatform testLogging showStandardStreams = true dependencies implementation platform org http4k http4k bom $ http4kVersion implementation org http4k http4k core implementation org http4k http4k serverless lambda implementation org http4k http4k cloudnative implementation org http4k http4k contract implementation org http4k http4k format moshi exclude group org jetbrains kotlin module kotlin reflect implementation se ansman kotshi api $kotshiVersion ksp se ansman kotshi compiler $kotshiVersion implementation org http4k http4k opentelemetry $ http4kVersion implementation org apache pdfbox pdfbox 2 0 27 implementation de redsix pdfcompare 1 1 61 implementation net sf barcode4j barcode4j 2 1 testImplementation platform org junit junit bom $ junitVersion testImplementation org http4k http4k testing hamkrest testImplementation org junit jupiter junit jupiter api testImplementation org junit jupiter junit jupiter engine shadowJar manifest attributes Main Class = it multidialogo multiprinter MultiprinterKt archiveBaseName set multiprinter archiveClassifier set null archiveVersion set null mergeServiceFiles task buildZip type Zip from compileKotlin from processResources into lib from configurations compileClasspath ```

Nicola · Answer

imports where I have the problem are these ```import com squareup moshi JsonAdapter import com squareup moshi Moshi import it multidialogo multiprinter domain Payment import it multidialogo multiprinter domain PaymentParty import it multidialogo multiprinter domain PaymentType import it multidialogo multiprinter dto MemoryMetricsDto import it multidialogo multiprinter dto PaymentRenderRequestDto import it multidialogo multiprinter dto PaymentRenderResponseDto import it multidialogo multiprinter dto RenderMetricsDto import it multidialogo multiprinter services RenderService import it multidialogo multiprinter utils RenderMetricsDurationMillisAdapter import org http4k cloudnative env Environment import org http4k cloudnative env EnvironmentKey import org http4k contract contract import org http4k contract meta import org http4k contract openapi ApiInfo import org http4k contract openapi v3 OpenApi3 import org http4k contract openapi v3 OpenApi3ApiRenderer import org http4k core import org http4k core Status Companion ACCEPTED import org http4k format import org http4k lens Lens import <http org http4k lens int|org http4k lens int> import org http4k lens string import org http4k routing routes import org http4k server SunHttp import org http4k server asServer import se ansman kotshi KotshiJsonAdapterFactory```

Nicola · Answer

I don t see jackson thinking face

dave · Answer

jackson isn t in there

dave · Answer

but the contract stuff ships with some bindings which will automatically pick up and use the definitions in jacksonExt kt The overloaded function looks like the OpenApi constructor

dave · Answer

`fun OpenApi3 `

dave · Answer

if you make sure to pass all of the args to the ORIGINAL OpenApi3 function it will pick up the correct one

Nicola · Answer

I am using the same parameters of the other project I will try anyway thaks a lot

Nicola · Answer

there is a big difference though one is a class jackson version is a fun

Nicola · Answer

this is the jacksonExt ```fun OpenApi3 apiInfo ApiInfo json ConfigurableJackson = OpenAPIJackson extensions List lt OpenApiExtension gt = emptyList servers List lt ApiServer gt = emptyList version OpenApiVersion = OpenApiVersion 3 0 0 = OpenApi3 apiInfo json extensions ApiRenderer Auto json AutoJsonToJsonSchema json servers = servers version = version ```

Nicola · Answer

the working version is this ```class OpenApi3 lt NODE Any gt private val apiInfo ApiInfo private val json Json lt NODE gt private val extensions List lt OpenApiExtension gt = emptyList private val apiRenderer ApiRenderer lt Api lt NODE gt NODE gt = OpenApi3ApiRenderer json note that this is the basic OpenApi renderer if you want reflective Schema generation then you want to use ApiRenderer Auto instead with a compatible JSON instance private val securityRenderer SecurityRenderer = OpenApi3SecurityRenderer private val errorResponseRenderer ErrorResponseRenderer = JsonErrorResponseRenderer json private val servers List lt ApiServer gt = emptyList private val version OpenApiVersion = 3 0 0 ContractRenderer ErrorResponseRenderer by errorResponseRenderer ```

dave · Answer

I wonder if it s because you re using named parameters

Andrew O&apos;Hara · Answer

The arguments in their first example look the same as mine not sure why the jackson overload is being called

Nicola · Answer

I ve tried in this form ```renderer = OpenApi3 lt MoshiNode gt ApiInfo Renderer API 0 0 1 moshiLite OpenApi3ApiRenderer moshiLite ``` but still the jackson version is catched first

dave · Answer

version of Java version of Kotlin The key will be to call a version of the function which isn t handled by the JacksonExt kt

Nicola · Answer

java 11 I ve tried 1 8 too but with same results

Nicola · Answer

I will try there are some parameters that are in the not jackson version only

dave · Answer

that should definitely work Are you working on windows mac linux

Andrew O&apos;Hara · Answer

What version of http4k are you using It s not defined in your gradle file

Nicola · Answer

forcing securityRenderer which does not exist in the jackson version it works ```renderer = OpenApi3 apiInfo = ApiInfo Renderer API 0 0 1 json = moshiLite apiRenderer = OpenApi3ApiRenderer moshiLite securityRenderer = OpenApi3SecurityRenderer ```

Nicola · Answer

I am working on ubuntu 18 04

Nicola · Answer

```junitVersion=5 7 2 kotlinVersion=1 8 10 http4kVersion=4 41 0 0 kotshiVersion=2 10 2```

Andrew O&apos;Hara · Answer

Bizarre Forcing `apiRenderer` should have worked because it s not even an option for the Jackson overload But glad it s working for you now shrug

Nicola · Answer

I will re try removing securityRenderer but maybe tomorrow slightly smiling face thanks a lot again

Nicola · Answer

Not sure it may be a useful information but I think the problem was that I was using http4k 4 41 0 0 updating to 4 41 1 0 solves the problem i have the right overload without adding securityRenderer

dave · Answer

I ve no idea what changed but always be updatin joy

dave · Answer

it could have just been clearing gradle build caches would have done it Sometimes I get the impression that all may not be totally deterministic around this stuff wink