kotlin-server: Add support for Javalin (#17596)

* kotlin-server: Add support for Javalin * kotlin-server: Add Javalin generated sample code * Add output from build scripts * Address MR feedback * Update CI to include new Javalin sample
2024-01-15 13:22:20 +01:00
parent 36e4e4f316
commit 13edc5d494
44 changed files with 1362 additions and 45 deletions
--- a/samples/server/petstore/kotlin-server/javalin/.openapi-generator-ignore
+++ b/samples/server/petstore/kotlin-server/javalin/.openapi-generator-ignore
@@ -0,0 +1,23 @@
+# OpenAPI Generator Ignore
+# Generated by openapi-generator https://github.com/openapitools/openapi-generator
+
+# Use this file to prevent files from being overwritten by the generator.
+# The patterns follow closely to .gitignore or .dockerignore.
+
+# As an example, the C# client generator defines ApiClient.cs.
+# You can make changes and tell OpenAPI Generator to ignore just this file by uncommenting the following line:
+#ApiClient.cs
+
+# You can match any string of characters against a directory, file or extension with a single asterisk (*):
+#foo/*/qux
+# The above matches foo/bar/qux and foo/baz/qux, but not foo/bar/baz/qux
+
+# You can recursively match patterns against a directory, file or extension with a double asterisk (**):
+#foo/**/qux
+# This matches foo/bar/qux, foo/baz/qux, and foo/bar/baz/qux
+
+# You can also negate patterns with an exclamation (!).
+# For example, you can ignore all files in a docs folder with the file extension .md:
+#docs/*.md
+# Then explicitly reverse the ignore rule for a single file:
+#!docs/README.md
--- a/samples/server/petstore/kotlin-server/javalin/.openapi-generator/FILES
+++ b/samples/server/petstore/kotlin-server/javalin/.openapi-generator/FILES
@@ -0,0 +1,20 @@
+README.md
+build.gradle.kts
+gradle.properties
+settings.gradle
+src/main/kotlin/org/openapitools/server/Main.kt
+src/main/kotlin/org/openapitools/server/apis/PetApi.kt
+src/main/kotlin/org/openapitools/server/apis/PetApiService.kt
+src/main/kotlin/org/openapitools/server/apis/PetApiServiceImpl.kt
+src/main/kotlin/org/openapitools/server/apis/StoreApi.kt
+src/main/kotlin/org/openapitools/server/apis/StoreApiService.kt
+src/main/kotlin/org/openapitools/server/apis/StoreApiServiceImpl.kt
+src/main/kotlin/org/openapitools/server/apis/UserApi.kt
+src/main/kotlin/org/openapitools/server/apis/UserApiService.kt
+src/main/kotlin/org/openapitools/server/apis/UserApiServiceImpl.kt
+src/main/kotlin/org/openapitools/server/models/Category.kt
+src/main/kotlin/org/openapitools/server/models/ModelApiResponse.kt
+src/main/kotlin/org/openapitools/server/models/Order.kt
+src/main/kotlin/org/openapitools/server/models/Pet.kt
+src/main/kotlin/org/openapitools/server/models/Tag.kt
+src/main/kotlin/org/openapitools/server/models/User.kt
--- a/samples/server/petstore/kotlin-server/javalin/.openapi-generator/VERSION
+++ b/samples/server/petstore/kotlin-server/javalin/.openapi-generator/VERSION
@@ -0,0 +1 @@
+7.3.0-SNAPSHOT
--- a/samples/server/petstore/kotlin-server/javalin/README.md
+++ b/samples/server/petstore/kotlin-server/javalin/README.md
@@ -0,0 +1,101 @@
+# org.openapitools.server - Kotlin Server library for OpenAPI Petstore
+
+This is a sample server Petstore server. For this sample, you can use the api key &#x60;special-key&#x60; to test the authorization filters.
+
+Generated by OpenAPI Generator 7.3.0-SNAPSHOT.
+
+## Build
+
+First, create the gradle wrapper script:
+
+```
+gradle wrapper
+```
+
+Then, run:
+
+```
+./gradlew check assemble
+```
+
+This runs all tests and packages the library.
+
+## Running
+
+The server builds as a fat jar with a main entrypoint. To start the service, run `java -jar ./build/libs/kotlin-server.jar`.
+
+You may also run in docker:
+
+```
+docker build -t kotlin-server .
+docker run -p 8080:8080 kotlin-server
+```
+
+## Features/Implementation Notes
+
+* Supports JSON inputs/outputs, File inputs, and Form inputs (see ktor documentation for more info).
+* ~Supports collection formats for query parameters: csv, tsv, ssv, pipes.~
+* Some Kotlin and Java types are fully qualified to avoid conflicts with types defined in OpenAPI definitions.
+
+<a id="documentation-for-api-endpoints"></a>
+## Documentation for API Endpoints
+
+All URIs are relative to *http://petstore.swagger.io/v2*
+
+Class | Method | HTTP request | Description
+------------ | ------------- | ------------- | -------------
+*PetApi* | [**addPet**](docs/PetApi.md#addpet) | **POST** /pet | Add a new pet to the store
+*PetApi* | [**deletePet**](docs/PetApi.md#deletepet) | **DELETE** /pet/{petId} | Deletes a pet
+*PetApi* | [**findPetsByStatus**](docs/PetApi.md#findpetsbystatus) | **GET** /pet/findByStatus | Finds Pets by status
+*PetApi* | [**findPetsByTags**](docs/PetApi.md#findpetsbytags) | **GET** /pet/findByTags | Finds Pets by tags
+*PetApi* | [**getPetById**](docs/PetApi.md#getpetbyid) | **GET** /pet/{petId} | Find pet by ID
+*PetApi* | [**updatePet**](docs/PetApi.md#updatepet) | **PUT** /pet | Update an existing pet
+*PetApi* | [**updatePetWithForm**](docs/PetApi.md#updatepetwithform) | **POST** /pet/{petId} | Updates a pet in the store with form data
+*PetApi* | [**uploadFile**](docs/PetApi.md#uploadfile) | **POST** /pet/{petId}/uploadImage | uploads an image
+*StoreApi* | [**deleteOrder**](docs/StoreApi.md#deleteorder) | **DELETE** /store/order/{orderId} | Delete purchase order by ID
+*StoreApi* | [**getInventory**](docs/StoreApi.md#getinventory) | **GET** /store/inventory | Returns pet inventories by status
+*StoreApi* | [**getOrderById**](docs/StoreApi.md#getorderbyid) | **GET** /store/order/{orderId} | Find purchase order by ID
+*StoreApi* | [**placeOrder**](docs/StoreApi.md#placeorder) | **POST** /store/order | Place an order for a pet
+*UserApi* | [**createUser**](docs/UserApi.md#createuser) | **POST** /user | Create user
+*UserApi* | [**createUsersWithArrayInput**](docs/UserApi.md#createuserswitharrayinput) | **POST** /user/createWithArray | Creates list of users with given input array
+*UserApi* | [**createUsersWithListInput**](docs/UserApi.md#createuserswithlistinput) | **POST** /user/createWithList | Creates list of users with given input array
+*UserApi* | [**deleteUser**](docs/UserApi.md#deleteuser) | **DELETE** /user/{username} | Delete user
+*UserApi* | [**getUserByName**](docs/UserApi.md#getuserbyname) | **GET** /user/{username} | Get user by user name
+*UserApi* | [**loginUser**](docs/UserApi.md#loginuser) | **GET** /user/login | Logs user into the system
+*UserApi* | [**logoutUser**](docs/UserApi.md#logoutuser) | **GET** /user/logout | Logs out current logged in user session
+*UserApi* | [**updateUser**](docs/UserApi.md#updateuser) | **PUT** /user/{username} | Updated user
+
+
+<a id="documentation-for-models"></a>
+## Documentation for Models
+
+ - [org.openapitools.server.models.Category](docs/Category.md)
+ - [org.openapitools.server.models.ModelApiResponse](docs/ModelApiResponse.md)
+ - [org.openapitools.server.models.Order](docs/Order.md)
+ - [org.openapitools.server.models.Pet](docs/Pet.md)
+ - [org.openapitools.server.models.Tag](docs/Tag.md)
+ - [org.openapitools.server.models.User](docs/User.md)
+
+
+<a id="documentation-for-authorization"></a>
+## Documentation for Authorization
+
+
+Authentication schemes defined for the API:
+<a id="petstore_auth"></a>
+### petstore_auth
+
+- **Type**: OAuth
+- **Flow**: implicit
+- **Authorization URL**: http://petstore.swagger.io/api/oauth/dialog
+- **Scopes**: 
+  - write:pets: modify pets in your account
+  - read:pets: read your pets
+
+<a id="api_key"></a>
+### api_key
+
+- **Type**: API key
+- **API key parameter name**: api_key
+- **Location**: HTTP header
+
--- a/samples/server/petstore/kotlin-server/javalin/build.gradle.kts
+++ b/samples/server/petstore/kotlin-server/javalin/build.gradle.kts
@@ -0,0 +1,35 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+    kotlin("jvm") version "1.9.21"
+}
+
+group = "org.openapitools"
+version = "1.0.0"
+java.sourceCompatibility = JavaVersion.VERSION_17
+
+repositories {
+    mavenCentral()
+}
+
+tasks.withType<KotlinCompile> {
+    kotlinOptions.jvmTarget = "17"
+}
+
+dependencies {
+    implementation("io.javalin:javalin:5.6.3")
+    implementation("io.javalin.community.routing:routing-core:5.6.2-RC.1")
+    implementation("io.javalin.community.routing:routing-dsl:5.6.2-RC.1")
+    implementation("com.fasterxml.jackson.core:jackson-databind:2.16.1")
+    implementation("com.fasterxml.jackson.module:jackson-module-kotlin:2.16.1")
+    implementation("org.slf4j:slf4j-simple:2.0.7")
+
+    testImplementation("org.jetbrains.kotlin:kotlin-test")
+}
+
+tasks.test {
+    useJUnitPlatform()
+}
+kotlin {
+    jvmToolchain(17)
+}
--- a/samples/server/petstore/kotlin-server/javalin/gradle.properties
+++ b/samples/server/petstore/kotlin-server/javalin/gradle.properties
@@ -0,0 +1 @@
+org.gradle.caching=true
--- a/samples/server/petstore/kotlin-server/javalin/settings.gradle
+++ b/samples/server/petstore/kotlin-server/javalin/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'kotlin-server'
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/Main.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/Main.kt
@@ -0,0 +1,48 @@
+package org.openapitools.server
+
+import io.javalin.Javalin
+import io.javalin.community.routing.dsl.routing
+
+import org.openapitools.server.apis.PetApi
+import org.openapitools.server.apis.PetApiServiceImpl
+import org.openapitools.server.apis.StoreApi
+import org.openapitools.server.apis.StoreApiServiceImpl
+import org.openapitools.server.apis.UserApi
+import org.openapitools.server.apis.UserApiServiceImpl
+
+fun main() {
+    val PetApi = PetApi(PetApiServiceImpl())
+    val StoreApi = StoreApi(StoreApiServiceImpl())
+    val UserApi = UserApi(UserApiServiceImpl())
+
+    val app = Javalin
+        .create { config ->
+            config.routing {
+                post("/pet", PetApi::addPet)
+                delete("/pet/{petId}", PetApi::deletePet)
+                get("/pet/findByStatus", PetApi::findPetsByStatus)
+                get("/pet/findByTags", PetApi::findPetsByTags)
+                get("/pet/{petId}", PetApi::getPetById)
+                put("/pet", PetApi::updatePet)
+                post("/pet/{petId}", PetApi::updatePetWithForm)
+                post("/pet/{petId}/uploadImage", PetApi::uploadFile)
+
+                delete("/store/order/{orderId}", StoreApi::deleteOrder)
+                get("/store/inventory", StoreApi::getInventory)
+                get("/store/order/{orderId}", StoreApi::getOrderById)
+                post("/store/order", StoreApi::placeOrder)
+
+                post("/user", UserApi::createUser)
+                post("/user/createWithArray", UserApi::createUsersWithArrayInput)
+                post("/user/createWithList", UserApi::createUsersWithListInput)
+                delete("/user/{username}", UserApi::deleteUser)
+                get("/user/{username}", UserApi::getUserByName)
+                get("/user/login", UserApi::loginUser)
+                get("/user/logout", UserApi::logoutUser)
+                put("/user/{username}", UserApi::updateUser)
+
+            }
+        }
+
+    app.start()
+}
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/PetApi.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/PetApi.kt
@@ -0,0 +1,89 @@
+package org.openapitools.server.apis
+
+import io.javalin.http.Context
+import io.javalin.http.bodyAsClass
+import io.javalin.http.pathParamAsClass
+import io.javalin.http.queryParamAsClass
+
+import org.openapitools.server.models.ModelApiResponse
+import org.openapitools.server.models.Pet
+
+class PetApi(private val service: PetApiService) {
+    /**
+     * Add a new pet to the store
+     * 
+     * @param pet Pet object that needs to be added to the store 
+     */
+    fun addPet(ctx: Context) {
+        ctx.status(200).json(service.addPet(ctx.bodyAsClass<Pet>()))
+    }
+
+    /**
+     * Deletes a pet
+     * 
+     * @param petId Pet id to delete 
+     * @param apiKey  (optional)
+     */
+    fun deletePet(ctx: Context) {
+        ctx.status(200).json(service.deletePet(ctx.pathParamAsClass<kotlin.Long>("petId").get(), ctx.header("api_key")))
+    }
+
+    /**
+     * Finds Pets by status
+     * Multiple status values can be provided with comma separated strings
+     * @param status Status values that need to be considered for filter 
+     */
+    fun findPetsByStatus(ctx: Context) {
+        ctx.status(200).json(service.findPetsByStatus(ctx.queryParams("status")))
+    }
+
+    /**
+     * Finds Pets by tags
+     * Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+     * @param tags Tags to filter by 
+     */
+    fun findPetsByTags(ctx: Context) {
+        ctx.status(200).json(service.findPetsByTags(ctx.queryParams("tags")))
+    }
+
+    /**
+     * Find pet by ID
+     * Returns a single pet
+     * @param petId ID of pet to return 
+     */
+    fun getPetById(ctx: Context) {
+        ctx.status(200).json(service.getPetById(ctx.pathParamAsClass<kotlin.Long>("petId").get()))
+    }
+
+    /**
+     * Update an existing pet
+     * 
+     * @param pet Pet object that needs to be added to the store 
+     */
+    fun updatePet(ctx: Context) {
+        ctx.status(200).json(service.updatePet(ctx.bodyAsClass<Pet>()))
+    }
+
+    /**
+     * Updates a pet in the store with form data
+     * 
+     * @param petId ID of pet that needs to be updated 
+     * @param name Updated name of the pet (optional)
+     * @param status Updated status of the pet (optional)
+     */
+    fun updatePetWithForm(ctx: Context) {
+        ctx.status(200).json(service.updatePetWithForm(ctx.pathParamAsClass<kotlin.Long>("petId").get(), ctx.formParam("name"), ctx.formParam("status")))
+    }
+
+    /**
+     * uploads an image
+     * 
+     * @param petId ID of pet to update 
+     * @param additionalMetadata Additional data to pass to server (optional)
+     * @param file file to upload (optional)
+     */
+    fun uploadFile(ctx: Context) {
+        ctx.status(200).json(service.uploadFile(ctx.pathParamAsClass<kotlin.Long>("petId").get(), ctx.formParam("additionalMetadata"), ctx.uploadedFile("file")))
+    }
+
+}
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/PetApiService.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/PetApiService.kt
@@ -0,0 +1,103 @@
+package org.openapitools.server.apis
+
+import org.openapitools.server.models.ModelApiResponse
+import org.openapitools.server.models.Pet
+
+interface PetApiService {
+
+    /**
+     * POST /pet : Add a new pet to the store
+     * 
+     *
+     * @param pet Pet object that needs to be added to the store (required)
+     * @return successful operation (status code 200)
+     *         or Invalid input (status code 405)
+     * @see PetApi#addPet
+     */
+    fun addPet(pet: Pet): Pet
+
+    /**
+     * DELETE /pet/{petId} : Deletes a pet
+     * 
+     *
+     * @param petId Pet id to delete (required)
+     * @param apiKey  (optional)
+     * @return Invalid pet value (status code 400)
+     * @see PetApi#deletePet
+     */
+    fun deletePet(petId: kotlin.Long, apiKey: kotlin.String?): Unit
+
+    /**
+     * GET /pet/findByStatus : Finds Pets by status
+     * Multiple status values can be provided with comma separated strings
+     *
+     * @param status Status values that need to be considered for filter (required)
+     * @return successful operation (status code 200)
+     *         or Invalid status value (status code 400)
+     * @see PetApi#findPetsByStatus
+     */
+    fun findPetsByStatus(status: kotlin.collections.List<kotlin.String>): List<Pet>
+
+    /**
+     * GET /pet/findByTags : Finds Pets by tags
+     * Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+     *
+     * @param tags Tags to filter by (required)
+     * @return successful operation (status code 200)
+     *         or Invalid tag value (status code 400)
+     * @deprecated
+     * @see PetApi#findPetsByTags
+     */
+    fun findPetsByTags(tags: kotlin.collections.List<kotlin.String>): List<Pet>
+
+    /**
+     * GET /pet/{petId} : Find pet by ID
+     * Returns a single pet
+     *
+     * @param petId ID of pet to return (required)
+     * @return successful operation (status code 200)
+     *         or Invalid ID supplied (status code 400)
+     *         or Pet not found (status code 404)
+     * @see PetApi#getPetById
+     */
+    fun getPetById(petId: kotlin.Long): Pet
+
+    /**
+     * PUT /pet : Update an existing pet
+     * 
+     *
+     * @param pet Pet object that needs to be added to the store (required)
+     * @return successful operation (status code 200)
+     *         or Invalid ID supplied (status code 400)
+     *         or Pet not found (status code 404)
+     *         or Validation exception (status code 405)
+     * API documentation for the updatePet operation
+     * @see <a href="http://petstore.swagger.io/v2/doc/updatePet">Update an existing pet Documentation</a>
+     * @see PetApi#updatePet
+     */
+    fun updatePet(pet: Pet): Pet
+
+    /**
+     * POST /pet/{petId} : Updates a pet in the store with form data
+     * 
+     *
+     * @param petId ID of pet that needs to be updated (required)
+     * @param name Updated name of the pet (optional)
+     * @param status Updated status of the pet (optional)
+     * @return Invalid input (status code 405)
+     * @see PetApi#updatePetWithForm
+     */
+    fun updatePetWithForm(petId: kotlin.Long, name: kotlin.String?, status: kotlin.String?): Unit
+
+    /**
+     * POST /pet/{petId}/uploadImage : uploads an image
+     * 
+     *
+     * @param petId ID of pet to update (required)
+     * @param additionalMetadata Additional data to pass to server (optional)
+     * @param file file to upload (optional)
+     * @return successful operation (status code 200)
+     * @see PetApi#uploadFile
+     */
+    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: io.javalin.http.UploadedFile?): ModelApiResponse
+}
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/PetApiServiceImpl.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/PetApiServiceImpl.kt
@@ -0,0 +1,39 @@
+package org.openapitools.server.apis
+
+import org.openapitools.server.models.ModelApiResponse
+import org.openapitools.server.models.Pet
+
+class PetApiServiceImpl : PetApiService {
+
+    override fun addPet(pet: Pet): Pet {
+        TODO("Implement me")
+    }
+
+    override fun deletePet(petId: kotlin.Long, apiKey: kotlin.String?): Unit {
+        TODO("Implement me")
+    }
+
+    override fun findPetsByStatus(status: kotlin.collections.List<kotlin.String>): List<Pet> {
+        TODO("Implement me")
+    }
+
+    override fun findPetsByTags(tags: kotlin.collections.List<kotlin.String>): List<Pet> {
+        TODO("Implement me")
+    }
+
+    override fun getPetById(petId: kotlin.Long): Pet {
+        TODO("Implement me")
+    }
+
+    override fun updatePet(pet: Pet): Pet {
+        TODO("Implement me")
+    }
+
+    override fun updatePetWithForm(petId: kotlin.Long, name: kotlin.String?, status: kotlin.String?): Unit {
+        TODO("Implement me")
+    }
+
+    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: io.javalin.http.UploadedFile?): ModelApiResponse {
+        TODO("Implement me")
+    }
+}
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/StoreApi.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/StoreApi.kt
@@ -0,0 +1,46 @@
+package org.openapitools.server.apis
+
+import io.javalin.http.Context
+import io.javalin.http.bodyAsClass
+import io.javalin.http.pathParamAsClass
+import io.javalin.http.queryParamAsClass
+
+import org.openapitools.server.models.Order
+
+class StoreApi(private val service: StoreApiService) {
+    /**
+     * Delete purchase order by ID
+     * For valid response try integer IDs with value &lt; 1000. Anything above 1000 or nonintegers will generate API errors
+     * @param orderId ID of the order that needs to be deleted 
+     */
+    fun deleteOrder(ctx: Context) {
+        ctx.status(200).json(service.deleteOrder(ctx.pathParamAsClass<kotlin.String>("orderId").get()))
+    }
+
+    /**
+     * Returns pet inventories by status
+     * Returns a map of status codes to quantities
+     */
+    fun getInventory(ctx: Context) {
+        ctx.status(200).json(service.getInventory())
+    }
+
+    /**
+     * Find purchase order by ID
+     * For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generate exceptions
+     * @param orderId ID of pet that needs to be fetched 
+     */
+    fun getOrderById(ctx: Context) {
+        ctx.status(200).json(service.getOrderById(ctx.pathParamAsClass<kotlin.Long>("orderId").get()))
+    }
+
+    /**
+     * Place an order for a pet
+     * 
+     * @param order order placed for purchasing the pet 
+     */
+    fun placeOrder(ctx: Context) {
+        ctx.status(200).json(service.placeOrder(ctx.bodyAsClass<Order>()))
+    }
+
+}
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/StoreApiService.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/StoreApiService.kt
@@ -0,0 +1,49 @@
+package org.openapitools.server.apis
+
+import org.openapitools.server.models.Order
+
+interface StoreApiService {
+
+    /**
+     * DELETE /store/order/{orderId} : Delete purchase order by ID
+     * For valid response try integer IDs with value &lt; 1000. Anything above 1000 or nonintegers will generate API errors
+     *
+     * @param orderId ID of the order that needs to be deleted (required)
+     * @return Invalid ID supplied (status code 400)
+     *         or Order not found (status code 404)
+     * @see StoreApi#deleteOrder
+     */
+    fun deleteOrder(orderId: kotlin.String): Unit
+
+    /**
+     * GET /store/inventory : Returns pet inventories by status
+     * Returns a map of status codes to quantities
+     *
+     * @return successful operation (status code 200)
+     * @see StoreApi#getInventory
+     */
+    fun getInventory(): Map<String, kotlin.Int>
+
+    /**
+     * GET /store/order/{orderId} : Find purchase order by ID
+     * For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generate exceptions
+     *
+     * @param orderId ID of pet that needs to be fetched (required)
+     * @return successful operation (status code 200)
+     *         or Invalid ID supplied (status code 400)
+     *         or Order not found (status code 404)
+     * @see StoreApi#getOrderById
+     */
+    fun getOrderById(orderId: kotlin.Long): Order
+
+    /**
+     * POST /store/order : Place an order for a pet
+     * 
+     *
+     * @param order order placed for purchasing the pet (required)
+     * @return successful operation (status code 200)
+     *         or Invalid Order (status code 400)
+     * @see StoreApi#placeOrder
+     */
+    fun placeOrder(order: Order): Order
+}
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/StoreApiServiceImpl.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/StoreApiServiceImpl.kt
@@ -0,0 +1,22 @@
+package org.openapitools.server.apis
+
+import org.openapitools.server.models.Order
+
+class StoreApiServiceImpl : StoreApiService {
+
+    override fun deleteOrder(orderId: kotlin.String): Unit {
+        TODO("Implement me")
+    }
+
+    override fun getInventory(): Map<String, kotlin.Int> {
+        TODO("Implement me")
+    }
+
+    override fun getOrderById(orderId: kotlin.Long): Order {
+        TODO("Implement me")
+    }
+
+    override fun placeOrder(order: Order): Order {
+        TODO("Implement me")
+    }
+}
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/UserApi.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/UserApi.kt
@@ -0,0 +1,84 @@
+package org.openapitools.server.apis
+
+import io.javalin.http.Context
+import io.javalin.http.bodyAsClass
+import io.javalin.http.pathParamAsClass
+import io.javalin.http.queryParamAsClass
+
+import org.openapitools.server.models.User
+
+class UserApi(private val service: UserApiService) {
+    /**
+     * Create user
+     * This can only be done by the logged in user.
+     * @param user Created user object 
+     */
+    fun createUser(ctx: Context) {
+        ctx.status(200).json(service.createUser(ctx.bodyAsClass<User>()))
+    }
+
+    /**
+     * Creates list of users with given input array
+     * 
+     * @param user List of user object 
+     */
+    fun createUsersWithArrayInput(ctx: Context) {
+        ctx.status(200).json(service.createUsersWithArrayInput(ctx.bodyAsClass<List<User>>()))
+    }
+
+    /**
+     * Creates list of users with given input array
+     * 
+     * @param user List of user object 
+     */
+    fun createUsersWithListInput(ctx: Context) {
+        ctx.status(200).json(service.createUsersWithListInput(ctx.bodyAsClass<List<User>>()))
+    }
+
+    /**
+     * Delete user
+     * This can only be done by the logged in user.
+     * @param username The name that needs to be deleted 
+     */
+    fun deleteUser(ctx: Context) {
+        ctx.status(200).json(service.deleteUser(ctx.pathParamAsClass<kotlin.String>("username").get()))
+    }
+
+    /**
+     * Get user by user name
+     * 
+     * @param username The name that needs to be fetched. Use user1 for testing. 
+     */
+    fun getUserByName(ctx: Context) {
+        ctx.status(200).json(service.getUserByName(ctx.pathParamAsClass<kotlin.String>("username").get()))
+    }
+
+    /**
+     * Logs user into the system
+     * 
+     * @param username The user name for login 
+     * @param password The password for login in clear text 
+     */
+    fun loginUser(ctx: Context) {
+        ctx.status(200).json(service.loginUser(ctx.queryParamAsClass<String>("username").get(), ctx.queryParamAsClass<String>("password").get()))
+    }
+
+    /**
+     * Logs out current logged in user session
+     * 
+     */
+    fun logoutUser(ctx: Context) {
+        ctx.status(200).json(service.logoutUser())
+    }
+
+    /**
+     * Updated user
+     * This can only be done by the logged in user.
+     * @param username name that need to be deleted 
+     * @param user Updated user object 
+     */
+    fun updateUser(ctx: Context) {
+        ctx.status(200).json(service.updateUser(ctx.pathParamAsClass<kotlin.String>("username").get(), ctx.bodyAsClass<User>()))
+    }
+
+}
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/UserApiService.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/UserApiService.kt
@@ -0,0 +1,92 @@
+package org.openapitools.server.apis
+
+import org.openapitools.server.models.User
+
+interface UserApiService {
+
+    /**
+     * POST /user : Create user
+     * This can only be done by the logged in user.
+     *
+     * @param user Created user object (required)
+     * @return successful operation (status code 200)
+     * @see UserApi#createUser
+     */
+    fun createUser(user: User): Unit
+
+    /**
+     * POST /user/createWithArray : Creates list of users with given input array
+     * 
+     *
+     * @param user List of user object (required)
+     * @return successful operation (status code 200)
+     * @see UserApi#createUsersWithArrayInput
+     */
+    fun createUsersWithArrayInput(user: kotlin.collections.List<User>): Unit
+
+    /**
+     * POST /user/createWithList : Creates list of users with given input array
+     * 
+     *
+     * @param user List of user object (required)
+     * @return successful operation (status code 200)
+     * @see UserApi#createUsersWithListInput
+     */
+    fun createUsersWithListInput(user: kotlin.collections.List<User>): Unit
+
+    /**
+     * DELETE /user/{username} : Delete user
+     * This can only be done by the logged in user.
+     *
+     * @param username The name that needs to be deleted (required)
+     * @return Invalid username supplied (status code 400)
+     *         or User not found (status code 404)
+     * @see UserApi#deleteUser
+     */
+    fun deleteUser(username: kotlin.String): Unit
+
+    /**
+     * GET /user/{username} : Get user by user name
+     * 
+     *
+     * @param username The name that needs to be fetched. Use user1 for testing. (required)
+     * @return successful operation (status code 200)
+     *         or Invalid username supplied (status code 400)
+     *         or User not found (status code 404)
+     * @see UserApi#getUserByName
+     */
+    fun getUserByName(username: kotlin.String): User
+
+    /**
+     * GET /user/login : Logs user into the system
+     * 
+     *
+     * @param username The user name for login (required)
+     * @param password The password for login in clear text (required)
+     * @return successful operation (status code 200)
+     *         or Invalid username/password supplied (status code 400)
+     * @see UserApi#loginUser
+     */
+    fun loginUser(username: kotlin.String, password: kotlin.String): kotlin.String
+
+    /**
+     * GET /user/logout : Logs out current logged in user session
+     * 
+     *
+     * @return successful operation (status code 200)
+     * @see UserApi#logoutUser
+     */
+    fun logoutUser(): Unit
+
+    /**
+     * PUT /user/{username} : Updated user
+     * This can only be done by the logged in user.
+     *
+     * @param username name that need to be deleted (required)
+     * @param user Updated user object (required)
+     * @return Invalid user supplied (status code 400)
+     *         or User not found (status code 404)
+     * @see UserApi#updateUser
+     */
+    fun updateUser(username: kotlin.String, user: User): Unit
+}
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/UserApiServiceImpl.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/apis/UserApiServiceImpl.kt
@@ -0,0 +1,38 @@
+package org.openapitools.server.apis
+
+import org.openapitools.server.models.User
+
+class UserApiServiceImpl : UserApiService {
+
+    override fun createUser(user: User): Unit {
+        TODO("Implement me")
+    }
+
+    override fun createUsersWithArrayInput(user: kotlin.collections.List<User>): Unit {
+        TODO("Implement me")
+    }
+
+    override fun createUsersWithListInput(user: kotlin.collections.List<User>): Unit {
+        TODO("Implement me")
+    }
+
+    override fun deleteUser(username: kotlin.String): Unit {
+        TODO("Implement me")
+    }
+
+    override fun getUserByName(username: kotlin.String): User {
+        TODO("Implement me")
+    }
+
+    override fun loginUser(username: kotlin.String, password: kotlin.String): kotlin.String {
+        TODO("Implement me")
+    }
+
+    override fun logoutUser(): Unit {
+        TODO("Implement me")
+    }
+
+    override fun updateUser(username: kotlin.String, user: User): Unit {
+        TODO("Implement me")
+    }
+}
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/models/Category.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/models/Category.kt
@@ -0,0 +1,24 @@
+/**
+ * OpenAPI Petstore
+ * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+*/
+package org.openapitools.server.models
+
+
+/**
+ * A category for a pet
+ * @param id 
+ * @param name 
+ */
+data class Category(
+    val id: kotlin.Long? = null,
+    val name: kotlin.String? = null
+) 
+
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/models/ModelApiResponse.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/models/ModelApiResponse.kt
@@ -0,0 +1,26 @@
+/**
+ * OpenAPI Petstore
+ * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+*/
+package org.openapitools.server.models
+
+
+/**
+ * Describes the result of uploading an image resource
+ * @param code 
+ * @param type 
+ * @param message 
+ */
+data class ModelApiResponse(
+    val code: kotlin.Int? = null,
+    val type: kotlin.String? = null,
+    val message: kotlin.String? = null
+) 
+
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/models/Order.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/models/Order.kt
@@ -0,0 +1,44 @@
+/**
+ * OpenAPI Petstore
+ * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+*/
+package org.openapitools.server.models
+
+
+/**
+ * An order for a pets from the pet store
+ * @param id 
+ * @param petId 
+ * @param quantity 
+ * @param shipDate 
+ * @param status Order Status
+ * @param complete 
+ */
+data class Order(
+    val id: kotlin.Long? = null,
+    val petId: kotlin.Long? = null,
+    val quantity: kotlin.Int? = null,
+    val shipDate: java.time.OffsetDateTime? = null,
+    /* Order Status */
+    val status: Order.Status? = null,
+    val complete: kotlin.Boolean? = false
+) 
+{
+    /**
+    * Order Status
+    * Values: placed,approved,delivered
+    */
+    enum class Status(val value: kotlin.String){
+        placed("placed"),
+        approved("approved"),
+        delivered("delivered");
+    }
+}
+
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/models/Pet.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/models/Pet.kt
@@ -0,0 +1,46 @@
+/**
+ * OpenAPI Petstore
+ * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+*/
+package org.openapitools.server.models
+
+import org.openapitools.server.models.Category
+import org.openapitools.server.models.Tag
+
+/**
+ * A pet for sale in the pet store
+ * @param name 
+ * @param photoUrls 
+ * @param id 
+ * @param category 
+ * @param tags 
+ * @param status pet status in the store
+ */
+data class Pet(
+    val name: kotlin.String,
+    val photoUrls: kotlin.collections.List<kotlin.String>,
+    val id: kotlin.Long? = null,
+    val category: Category? = null,
+    val tags: kotlin.collections.List<Tag>? = null,
+    /* pet status in the store */
+    val status: Pet.Status? = null
+) 
+{
+    /**
+    * pet status in the store
+    * Values: available,pending,sold
+    */
+    enum class Status(val value: kotlin.String){
+        available("available"),
+        pending("pending"),
+        sold("sold");
+    }
+}
+
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/models/Tag.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/models/Tag.kt
@@ -0,0 +1,24 @@
+/**
+ * OpenAPI Petstore
+ * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+*/
+package org.openapitools.server.models
+
+
+/**
+ * A tag for a pet
+ * @param id 
+ * @param name 
+ */
+data class Tag(
+    val id: kotlin.Long? = null,
+    val name: kotlin.String? = null
+) 
+
--- a/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/models/User.kt
+++ b/samples/server/petstore/kotlin-server/javalin/src/main/kotlin/org/openapitools/server/models/User.kt
@@ -0,0 +1,37 @@
+/**
+ * OpenAPI Petstore
+ * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+*/
+package org.openapitools.server.models
+
+
+/**
+ * A User who is purchasing from the pet store
+ * @param id 
+ * @param username 
+ * @param firstName 
+ * @param lastName 
+ * @param email 
+ * @param password 
+ * @param phone 
+ * @param userStatus User Status
+ */
+data class User(
+    val id: kotlin.Long? = null,
+    val username: kotlin.String? = null,
+    val firstName: kotlin.String? = null,
+    val lastName: kotlin.String? = null,
+    val email: kotlin.String? = null,
+    val password: kotlin.String? = null,
+    val phone: kotlin.String? = null,
+    /* User Status */
+    val userStatus: kotlin.Int? = null
+) 
+