GraphQL Kotlin VS openapi-generator

New to Kotlin, but trying to create a project with Kotlin, GraphQL, and Postgres. I'm not opposed to using ktor, but was hoping to use spring boot. I liked expedia's GraphQL Kotlin but having a hard time finding tutorials that go over how to set up a project like this. I see that there are some examples here https://github.com/ExpediaGroup/graphql-kotlin/tree/master/examples but wondering if there are any tutorials anyone could recommend

Their client framework officially supports ktor client https://github.com/ExpediaGroup/graphql-kotlin/tree/master/clients/graphql-kotlin-ktor-client while their schema generator seems to be just framework-independent jvm library https://github.com/ExpediaGroup/graphql-kotlin/tree/master/generator/graphql-kotlin-schema-generator And you could use their gradle plugin as described here https://github.com/ExpediaGroup/graphql-kotlin/tree/master/plugins/graphql-kotlin-gradle-plugin which would make the whole thing a breeze I guess :)

GraphQL Kotlin consists of a number of libraries that aim to simplify the running of GraphQL servers and clients using Kotlin. It’s been over 10 months since the last major release of graphql-kotlin and after hundreds of commits and numerous pre-releases, we are pleased to announce the 4.0.0 release!

Disclaimer: We're an early adopter of Stainless at Mux.

I've spent more of my time than I'd like to admit managing both OpenAPi spec files [1] and fighting with openapi-generator [2] than any sane person should have to. While it's great having the freedom to change the templates an thus generated SDKs you get with using that sort of approach, it's also super time consuming, and when you have a lot of SDKs (we have 6 generated SDKs), in my experience it needs someone devoted to managing the process, staying up with template changes etc.

Excited to see more SDK languages come to Stainless!

[1] https://www.mux.com/blog/an-adventure-in-openapi-v3-api-code...

[2] https://github.com/OpenAPITools/openapi-generator

As a result, the following specification can be used to generate clients in a number of different languages via OpenAPI Generator.

Of course you can compile the server from source if you have Go and the OpenAPI generator JAR (https://github.com/OpenAPITools/openapi-generator?tab=readme...)

Follow these steps : https://github.com/c100k/rebootx-on-prem/blob/master/.github...

And then :

(cd ./impl/http-server-go && GOARCH=amd64 GOOS=openbsd go build -o /app/rebootx-on-prem-http-server-go-openbsd-amd64 -v)

By adapting the arch if needed. Not tested, but it should work.

TL;DR: Start generating your HTTP clients and all the DTOs of the requests and responses automatically from your API, using openapi-generator instead of writing your own.

As an alternative, you can also use the official OpenAPI Generator, which is a more generic tool supporting a wide range of languages and frameworks.

I trialed generating SDKs using the OpenAPI Generator package, which was largely unsatisfactory.

If Swagger/OpenAPI is available, save yourself a lot of trouble and generate the client using OpenAPI Generator. If not, use a library like RestEase to make it significantly easier to create the client.

For a run of the mill REST API you should generate OpenAPI (Swagger) info for the API using a library like NSwag or Swashbuckle. You'd want to do this no matter what because it's documentation for the API, but the bonus is that you can use it with tools like OpenAPI Generator to create API client code and models in a variety of languages. You certainly can create an API client library manually, it would entail having a nuget package with a class library that contains the models and client code for calling the endpoints (which I'd create using a lib such as RestEase unless you just enjoy writing boilerplate code by hand). However 95% of the time it simply isn't worth creating your own lib when OpenAPI is available because once you've done it a time or two it takes less than 5 min to run the generator and create (or update) a lib.

Then you can use oapi-codegen or openapi-generator to generate the Go (or other language) SDK for it.