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OpenApiOptions fails to initialize without jackson-module-kotlin

See original GitHub issue

Actual behavior (the bug) When you don’t have jackson-module-kotlin installed, initializing OpenApiOptions fails before you can specify a replacement ToJsonMapper.

Exception in thread "main" java.lang.NoClassDefFoundError: com/fasterxml/jackson/module/kotlin/ExtensionsKt
	at io.javalin.plugin.openapi.jackson.JacksonToJsonMapper.<clinit>(JacksonToJsonMapper.kt:12)
	at io.javalin.plugin.openapi.OpenApiOptions.<init>(OpenApiOptions.kt:42)
	at io.javalin.plugin.openapi.OpenApiOptions.<init>(OpenApiOptions.kt:48)
	at io.javalin.plugin.openapi.OpenApiOptions.<init>(OpenApiOptions.kt:49)
	...........registerSwagger(Server.java:171)
        ..........
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.module.kotlin.ExtensionsKt
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 7 more

Expected behavior The OpenApiOptions should allow me to specify an alternate ToJsonMapper before trying to initialize the default one provided by the missing jackson-module-kotlin.

To Reproduce

private void registerSwagger(Javalin app) {
    final Info applicationInfo = new Info()
                .version("1.0")
                .description("My Application");
    final OpenApiOptions options = new OpenApiOptions(applicationInfo).path("/swagger-docs");

    final Gson gson = new Gson();
    options.setToJsonMapper(gson::toJson);

    app.config.registerPlugin(new OpenApiPlugin(options));
}

Issue Analytics

State:
Created 4 years ago
Comments:8 (7 by maintainers)

Top GitHub Comments

1reaction

tipsycommented, Jun 18, 2019

Yes, in the weekend 😃

0reactions

agugliecommented, Jul 28, 2019

Hi 😄 Was it fixed? I think I’m still getting the same error:

    void run() {
        Gson gson = new GsonBuilder().create();
        JavalinJson.setFromJsonMapper(gson::fromJson);
        JavalinJson.setToJsonMapper(gson::toJson);
        Javalin app = Javalin.create(config -> config.registerPlugin(
                new OpenApiPlugin(
                        new OpenApiOptions(new Info().version("1.0").description("My Application"))
                                .path("/swagger-docs")
                                .toJsonMapper(gson::toJson)
                ))).start();
        app.get("/", ctx -> ctx.result("Hello World"));
    }

I’m getting:

[qtp712256162-15] ERROR io.javalin.Javalin - Exception occurred while servicing http-request
java.lang.NoClassDefFoundError: com/fasterxml/jackson/module/kotlin/ExtensionsKt
	at io.javalin.plugin.openapi.jackson.JacksonToJsonMapper$objectMapper$2.invoke(JacksonToJsonMapper.kt:12)
	at io.javalin.plugin.openapi.jackson.JacksonToJsonMapper$objectMapper$2.invoke(JacksonToJsonMapper.kt:11)
	at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:74)
	at io.javalin.plugin.openapi.jackson.JacksonToJsonMapper.getObjectMapper(JacksonToJsonMapper.kt)

Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.module.kotlin.ExtensionsKt
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

My pom.xml section:

    <dependencies>
        <dependency>
            <groupId>io.javalin</groupId>
            <artifactId>javalin</artifactId>
            <version>3.3.0</version>
        </dependency>
        <dependency>
            <groupId>io.swagger.core.v3</groupId>
            <artifactId>swagger-models</artifactId>
            <version>2.0.8</version>
        </dependency>
        <dependency>
            <groupId>cc.vileda</groupId>
            <artifactId>kotlin-openapi3-dsl</artifactId>
            <version>0.20.1</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.7.26</version>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.5</version>
        </dependency>
    </dependencies>

Running on openjdk version “1.8.0_222”