kotlinlang #spring

Hi folks! A newbie question (didn't have a lot of background in Java before learning Kotlin). How do I know if there are existing ~~notations~~ annotations to help me to do certain things?

Jacob

05/05/2021, 8:55 PM

Anything I should know about before upgrading my spring boot projects to kotlin 1.5.x?

ermac10k

05/06/2021, 7:44 AM

Hello! how to benchmark my spring with kotlin service? all internet guides are for java and don’t work for kotlin(

Dennis Schröder

05/09/2021, 11:48 AM

I have this simple JPARepository

interface ProductDAO : JpaRepository<ProductDTO, UUID>

That I would like to instantiate manually so I can register it via the beans Kotlin DSL like this:

fun beanDeclarations() = beans {
    bean<ProductDAO>()
    bean<ProductRepository> {
        ProductJPARepository(ref())
    }
    bean<ProductApplicationService> {
        ProductApplicationServiceImpl(ref())
    }
}

Could find anything in the interweb … @sdeleuze

Michael Böiers

05/11/2021, 7:02 AM

I’ve recently converted a project which uses JPA metamodel generation from Java to Kotlin/JVM. I’m a little worried about using kapt and its issues with newer JDKs - we’re using Java 16, and there kapt only works with a deprecated JDK flag (--illegal-access=permit). Are there better options to generate JPA metamodels in Kotlin?

Mario Ruiz

05/14/2021, 5:30 AM

Hi, I'm trying to setup a Spring Cloud Streams app that talks with Kafka, but configuring it has been a nightmare. What I'm trying to do is: have to pipelines made of composing multiple functions. Have separate series for input and output of each pipeline's consumer and producer. Handle schema registry login info. Have a producer pick a topic based on message content.

:not-kotlin: 3

Mario Ruiz

05/14/2021, 5:31 AM

But I've tried pretty much everything I've found online regarding config, and it's a mess. You can configure Kafka in like four different places, and they all have slightly different prop names and types

Wolf Logan

05/14/2021, 11:16 PM

I recently discovered (as in "today") that using the

org.springframework.boot

Gradle plugin interferes with running JVM tests in my Kotlin MPP project.

marzelwidmer

05/17/2021, 7:14 PM

Hello I have a stupid question… 🙂 I get from the

spring-cloud-gateway-server-3.0.2

the following message….

Class 'org.springframework.cloud.gateway.route.builder.RouteDslKt' is compiled by a pre-release version of Kotlin and cannot be loaded by this version of the compiler

Dany

05/23/2021, 4:13 PM

@Configuration / @ConfigurationProperties doesn't work. My application.yml

seon:
  uri: 123

My SeonConfiguration class:

@Configuration
@ConfigurationProperties(prefix = "seon")
data class SeonConfiguration(
    var uri: String = ""
)

My main class:

@SpringBootApplication
@ConfigurationPropertiesScan
@EnableConfigurationProperties
class WadzpayServiceApplication
fun main(args: Array<String>) {
    val seonConfiguration: SeonConfiguration = SeonConfiguration()
    print(seonConfiguration.uri) //this line prints null
    runApplication<WadzpayServiceApplication>(*args)
}

I had been looking all the possibile answers on stackoverflow, getting my head crazy but still can't make it work. Any help would be massively appreciated!

marzelwidmer

05/27/2021, 6:27 PM

Hello I was not sure where to ask… https://kotlinlang.slack.com/archives/C1CFAFJSK/p1622140005192900

Neil

06/02/2021, 3:16 PM

What's best practise for processing a lot of SQL rows without loading them all into memory at once? spring-data will return a (java8) Stream but I'm not sure if anything (mysql driver, hibernate, one of kotlin's composable operators) might pull on the Stream and effectively turn it into a List? Alternatively spring-data's pageable can return the data in chunks but I can't see a nice way of iterating around each chunk in a composable manner?

Dennis Schröder

06/15/2021, 3:53 PM

How can I inject a property from my

application.yaml

in a functional way?

beans {
    bean {
        Foo(property("foo.bar.buz"))
    }
}

marzelwidmer

06/17/2021, 2:59 PM

I try to configure

KotlinSerializationJsonEncoder

in my

SpringBoot

app. have maybe somebody a

hint

what is wrong in my configuration …. I get the following exception when I call my backend service.

org.springframework.web.reactive.function.client.WebClientResponseException: 200 OK from UNKNOWN ; nested exception is kotlinx.serialization.json.internal.JsonDecodingException: Unexpected JSON token at offset 7: Encountered an unknown key 'fooBar'.
Use 'ignoreUnknownKeys = true' in 'Json {}' builder to ignore unknown keys.
JSON input: {
    "fooBar": "123,345.....

I try to configured it like this:

@Configuration
class WebConfig : WebFluxConfigurer {
    //<https://docs.spring.io/spring-framework/docs/current/reference/html/web-reactive.html#webflux-config-message-codecs>
    override fun configureHttpMessageCodecs(configurer: ServerCodecConfigurer) {
        KotlinSerializationJsonEncoder(
            Json {
                ignoreUnknownKeys = true
            }
        )
    }
}

jush

06/18/2021, 8:35 AM

We would like to disable Kotlin Serialization and use Jackson until there's streaming support. Is there some way to disable the Kotlin serialization support in Spring? It seems that if we've

kotlinx.serialization.json.Json

in our dependencies it is automatically added.

Matthew Adams

06/18/2021, 8:03 PM

Does Spring Data

2021.0.1

support Kotlin

1.5

? The docs at https://docs.spring.io/spring-data/mongodb/docs/3.2.1/reference/html/#kotlin.requirements say

Spring Data supports Kotlin 1.3...

EricJTurley

06/21/2021, 5:35 PM

ConfigurationProperties - ParameterResolutionException I have:

@ConfigurationProperties("chat-replay")
@ConstructorBinding
data class ChatReplayProperties(
    val chatLogPrintInterval: Long,
    val poll: Poll,
    val generation: Generation,
    val query: Query,
    val external: External,
) {

But: • All the

chat-replay.generation.*

properties are in a

application-genchatlogs.properties

file, so... • When run with no active Spring Profiles, the

Generation

object is

null

And application startup fails with

ParameterResolutionException

of course. What's a good pattern for this?

Deji

06/22/2021, 8:10 PM

Hi all, I am using Spring Webflux and I need some help getting some code to compile

interface Base

data class Derived(val value: String): Base

fun getDerived(): Mono<Derived> = TODO()

fun getBase(): Mono<Base> = getDerived() // this line does not compile

fun getBase2(): Mono<Base> = getDerived().map { it } // this compiles fine

I am new to kotlin so I might be missing something. But is it possible to get the 4th line to compile without mapping it again? If this isn’t the right place to ask this please let me know the appropriate channel. Thanks!

Luca Piccinelli

06/29/2021, 5:58 AM

Good morning all. Do anyone know if there exist the possibility, with the production ready part of the Spring Kotlin Dsl to make the openAPI plugins work? Or there exist any alternative solution? https://www.baeldung.com/spring-rest-openapi-documentation

holgerbrandl

07/01/2021, 11:24 AM

Hi there, when using a nullable

@JvmInline value class

value in a thymeleaf template it fails with

EL1004E: Method call: Method now() cannot be found on type my.org.SimpleFactory

Is this a known problem? Is a workaround? In the IDE it resolves the method correctly, see the attached screenshot:

nfrankel

07/02/2021, 12:59 PM

name your bean and access it as usual your snippet produces anonymous beans

Emil Kantis

07/06/2021, 10:46 AM

Is there any official way of caching the result of a

suspend

fun? I realize the generated continuation might be creating issues with how the caching mechanism works..

ianbrandt

07/14/2021, 3:18 PM

Greetings, I had spring-boot-configuration-processor all working for

@ConfigurationProperties

data classes in my project with Kapt, Gradle, and IntelliJ. At some point along the line I started getting a red "Spring Boot Configuration Annotation Processor not configured" banner on my properties classes that wasn't there before. There's at least some association going on. If I add a property to 'application.properties' that's not in my

@ConfigurationProperties

class, I do get a "Cannot resolve configuration property" warning on that property. I've created a reproducer here: https://github.com/ianbrandt/spring-kapt I'm fairly certain there were no related changes to my project's configuration other than upgrades of Spring, Kapt, Gradle, and IntelliJ. I'm on the latest release versions of all of the above. Am I missing something that would cause the red IntelliJ banner to now appear where it hadn't before?

Derek Ellis

07/19/2021, 5:18 PM

So I've seen that kotlinx serialization can be used just by adding it to the classpath, and that it only handles classes marked with

@Serializable

and primitive collections before forwarding everything to Jackson. I've run into an issue where I want to serialize a

List

(I believe the implementation is just a regular

ArrayList

) of a serializable class that has some

@SerialName

annotations on the properties, but it looks like it's being forwarded to Jackson and the

@SerialName

names are being ignored. Is this functionality supported, and how would I update the configuration of my WebFlux project to use kotlinx serialization for this?

Jilles Soeters

07/28/2021, 11:33 PM

Any active open source projects using spring/kotlin? Would love to get some inspiration that goes deeper than the Spring Kotlin beginner tutorial

Jilles Soeters

07/30/2021, 5:54 PM

I’ve seen some repositories return

Iterable<T>

and others

List<T>

. I believe repositories return a

List

of entites so why would anyone specify return type of

Iterable

? e.g. https://github.com/spring-guides/tut-spring-boot-kotlin/blob/main/src/main/kotlin/com/example/blog/Repositories.kt#L7

efemoney

08/02/2021, 9:57 PM

Whats the standard way to query a graphql API within a kotlin spring boot application. What libraries are there (if any)?

Jilles Soeters

08/11/2021, 7:23 PM

While this isn’t strictly a Kotlin Spring question I wonder if anyone knows this: I have a JPA entity that has a lazy relationship. There is one method where I’d like it to be fetched eagerly. In Django for example it’s lazy by default but you can add

select_related

to make it eager. Is there a way to load a lazy relationship eagerly in Spring JPA without having to do

entities.forEach { it.lazy_loaded_attribute }

or something?

Adrian Cruz

08/13/2021, 12:56 PM

👋 hi, ya'll! i'm new to kotlin and spring; i have a REST controller that will be receiving webhooks. we want to validate these webhooks with a signature that gets sent over. we currently have a

@RequestBody body: MyDataClass

to get a deserialized object of the payload. but my problem is that i need to pass in the body as a String to validate the signature properly. Is there a proper way to handle this? or do i just update to

@RequestBody body: String

, then do validation, and finally do a manual

ObjectMapper

MyDataClass

marzelwidmer

08/15/2021, 3:32 PM

Hello have somebody Kotlin Spring Boot with Native Image

up&running.

https://github.com/marzelwidmer/kboot-native

[INFO]     [creator]       Native Image: Contributing to layer
[INFO]     [creator]         GraalVM 21.2.0 Java 11 CE (Java Version 11.0.12+6-jvmci-21.2-b08)
[INFO]     [creator]         Executing native-image -H:+StaticExecutableWithDynamicLibC -H:Name=/layers/paketo-buildpacks_native-image/native-image/com.example.demo.KbootNativeApplicationKt -cp /workspace:/workspace/BOOT-INF/classes:/workspace/BOOT-INF/lib/spring-native-0.10.0.jar:/workspace/BOOT-INF/lib/spring-boot-2.5.3.jar:/workspace/BOOT-INF/lib/spring-context-5.3.9.jar:/workspace/BOOT-INF/lib/spring-aop-5.3.9.jar:/workspace/BOOT-INF/lib/spring-expression-5.3.9.jar:/workspace/BOOT-INF/lib/spring-boot-autoconfigure-2.5.3.jar:/workspace/BOOT-INF/lib/logback-classic-1.2.4.jar:/workspace/BOOT-INF/lib/logback-core-1.2.4.jar:/workspace/BOOT-INF/lib/log4j-to-slf4j-2.14.1.jar:/workspace/BOOT-INF/lib/log4j-api-2.14.1.jar:/workspace/BOOT-INF/lib/jul-to-slf4j-1.7.32.jar:/workspace/BOOT-INF/lib/jakarta.annotation-api-1.3.5.jar:/workspace/BOOT-INF/lib/snakeyaml-1.28.jar:/workspace/BOOT-INF/lib/jackson-datatype-jdk8-2.12.4.jar:/workspace/BOOT-INF/lib/jackson-datatype-jsr310-2.12.4.jar:/workspace/BOOT-INF/lib/jackson-module-parameter-names-2.12.4.jar:/workspace/BOOT-INF/lib/reactor-netty-http-1.0.9.jar:/workspace/BOOT-INF/lib/netty-codec-http-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-common-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-buffer-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-transport-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-codec-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-handler-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-codec-http2-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-resolver-dns-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-resolver-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-codec-dns-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-resolver-dns-native-macos-4.1.66.Final-osx-x86_64.jar:/workspace/BOOT-INF/lib/netty-transport-native-unix-common-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-transport-native-epoll-4.1.66.Final-linux-x86_64.jar:/workspace/BOOT-INF/lib/reactor-netty-core-1.0.9.jar:/workspace/BOOT-INF/lib/netty-handler-proxy-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-codec-socks-4.1.66.Final.jar:/workspace/BOOT-INF/lib/spring-web-5.3.9.jar:/workspace/BOOT-INF/lib/spring-beans-5.3.9.jar:/workspace/BOOT-INF/lib/spring-webflux-5.3.9.jar:/workspace/BOOT-INF/lib/jackson-module-kotlin-2.12.4.jar:/workspace/BOOT-INF/lib/jackson-databind-2.12.4.jar:/workspace/BOOT-INF/lib/jackson-core-2.12.4.jar:/workspace/BOOT-INF/lib/jackson-annotations-2.12.4.jar:/workspace/BOOT-INF/lib/reactor-kotlin-extensions-1.1.3.jar:/workspace/BOOT-INF/lib/reactor-core-3.4.8.jar:/workspace/BOOT-INF/lib/reactive-streams-1.0.3.jar:/workspace/BOOT-INF/lib/kotlin-reflect-1.5.21.jar:/workspace/BOOT-INF/lib/kotlin-stdlib-1.5.21.jar:/workspace/BOOT-INF/lib/annotations-13.0.jar:/workspace/BOOT-INF/lib/kotlin-stdlib-common-1.5.21.jar:/workspace/BOOT-INF/lib/kotlin-stdlib-jdk8-1.5.21.jar:/workspace/BOOT-INF/lib/kotlin-stdlib-jdk7-1.5.21.jar:/workspace/BOOT-INF/lib/kotlinx-coroutines-reactor-1.5.1.jar:/workspace/BOOT-INF/lib/kotlinx-coroutines-reactive-1.5.1.jar:/workspace/BOOT-INF/lib/kotlinx-coroutines-core-jvm-1.5.1.jar:/workspace/BOOT-INF/lib/slf4j-api-1.7.32.jar:/workspace/BOOT-INF/lib/spring-core-5.3.9.jar:/workspace/BOOT-INF/lib/spring-jcl-5.3.9.jar:/workspace/BOOT-INF/lib/spring-boot-jarmode-layertools-2.5.3.jar com.example.demo.KbootNativeApplicationKt
[INFO]     [creator]     [/layers/paketo-buildpacks_native-image/native-image/com.example.demo.KbootNativeApplicationKt:183]    classlist:   3,477.37 ms,  1.19 GB
[INFO]     [creator]     [/layers/paketo-buildpacks_native-image/native-image/com.example.demo.KbootNativeApplicationKt:183]        (cap):     523.64 ms,  1.19 GB
[INFO]     [creator]     [/layers/paketo-buildpacks_native-image/native-image/com.example.demo.KbootNativeApplicationKt:183]        setup:   2,577.28 ms,  1.19 GB
[INFO]     [creator]     To see how the classes got initialized, use --trace-class-initialization=org.springframework.util.unit.DataSize
[INFO]     [creator]     [/layers/paketo-buildpacks_native-image/native-image/com.example.demo.KbootNativeApplicationKt:183]     analysis:  10,754.71 ms,  1.54 GB
[INFO]     [creator]     Error: Classes that should be initialized at run time got initialized during image building:
[INFO]     [creator]      org.springframework.util.unit.DataSize was unintentionally initialized at build time. To see why org.springframework.util.unit.DataSize got initialized use --trace-class-initialization=org.springframework.util.unit.DataSize
[INFO]     [creator]
[INFO]     [creator]     Error: Use -H:+ReportExceptionStackTraces to print stacktrace of underlying exception
[INFO]     [creator]     [/layers/paketo-buildpacks_native-image/native-image/com.example.demo.KbootNativeApplicationKt:183]      [total]:  17,145.94 ms,  1.54 GB
[INFO]     [creator]     # Printing build artifacts to: /layers/paketo-buildpacks_native-image/native-image/com.example.demo.KbootNativeApplicationKt.build_artifacts.txt
[INFO]     [creator]     Error: Image build request failed with exit status 1
[INFO]     [creator]     unable to invoke layer creator
[INFO]     [creator]     unable to contribute native-image layer
[INFO]     [creator]     error running build
[INFO]     [creator]     exit status 1
[INFO]     [creator]     ERROR: failed to build: exit status 1
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------

Title

marzelwidmer

08/15/2021, 3:32 PM

Hello have somebody Kotlin Spring Boot with Native Image

up&running.

https://github.com/marzelwidmer/kboot-native

[INFO]     [creator]       Native Image: Contributing to layer
[INFO]     [creator]         GraalVM 21.2.0 Java 11 CE (Java Version 11.0.12+6-jvmci-21.2-b08)
[INFO]     [creator]         Executing native-image -H:+StaticExecutableWithDynamicLibC -H:Name=/layers/paketo-buildpacks_native-image/native-image/com.example.demo.KbootNativeApplicationKt -cp /workspace:/workspace/BOOT-INF/classes:/workspace/BOOT-INF/lib/spring-native-0.10.0.jar:/workspace/BOOT-INF/lib/spring-boot-2.5.3.jar:/workspace/BOOT-INF/lib/spring-context-5.3.9.jar:/workspace/BOOT-INF/lib/spring-aop-5.3.9.jar:/workspace/BOOT-INF/lib/spring-expression-5.3.9.jar:/workspace/BOOT-INF/lib/spring-boot-autoconfigure-2.5.3.jar:/workspace/BOOT-INF/lib/logback-classic-1.2.4.jar:/workspace/BOOT-INF/lib/logback-core-1.2.4.jar:/workspace/BOOT-INF/lib/log4j-to-slf4j-2.14.1.jar:/workspace/BOOT-INF/lib/log4j-api-2.14.1.jar:/workspace/BOOT-INF/lib/jul-to-slf4j-1.7.32.jar:/workspace/BOOT-INF/lib/jakarta.annotation-api-1.3.5.jar:/workspace/BOOT-INF/lib/snakeyaml-1.28.jar:/workspace/BOOT-INF/lib/jackson-datatype-jdk8-2.12.4.jar:/workspace/BOOT-INF/lib/jackson-datatype-jsr310-2.12.4.jar:/workspace/BOOT-INF/lib/jackson-module-parameter-names-2.12.4.jar:/workspace/BOOT-INF/lib/reactor-netty-http-1.0.9.jar:/workspace/BOOT-INF/lib/netty-codec-http-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-common-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-buffer-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-transport-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-codec-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-handler-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-codec-http2-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-resolver-dns-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-resolver-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-codec-dns-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-resolver-dns-native-macos-4.1.66.Final-osx-x86_64.jar:/workspace/BOOT-INF/lib/netty-transport-native-unix-common-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-transport-native-epoll-4.1.66.Final-linux-x86_64.jar:/workspace/BOOT-INF/lib/reactor-netty-core-1.0.9.jar:/workspace/BOOT-INF/lib/netty-handler-proxy-4.1.66.Final.jar:/workspace/BOOT-INF/lib/netty-codec-socks-4.1.66.Final.jar:/workspace/BOOT-INF/lib/spring-web-5.3.9.jar:/workspace/BOOT-INF/lib/spring-beans-5.3.9.jar:/workspace/BOOT-INF/lib/spring-webflux-5.3.9.jar:/workspace/BOOT-INF/lib/jackson-module-kotlin-2.12.4.jar:/workspace/BOOT-INF/lib/jackson-databind-2.12.4.jar:/workspace/BOOT-INF/lib/jackson-core-2.12.4.jar:/workspace/BOOT-INF/lib/jackson-annotations-2.12.4.jar:/workspace/BOOT-INF/lib/reactor-kotlin-extensions-1.1.3.jar:/workspace/BOOT-INF/lib/reactor-core-3.4.8.jar:/workspace/BOOT-INF/lib/reactive-streams-1.0.3.jar:/workspace/BOOT-INF/lib/kotlin-reflect-1.5.21.jar:/workspace/BOOT-INF/lib/kotlin-stdlib-1.5.21.jar:/workspace/BOOT-INF/lib/annotations-13.0.jar:/workspace/BOOT-INF/lib/kotlin-stdlib-common-1.5.21.jar:/workspace/BOOT-INF/lib/kotlin-stdlib-jdk8-1.5.21.jar:/workspace/BOOT-INF/lib/kotlin-stdlib-jdk7-1.5.21.jar:/workspace/BOOT-INF/lib/kotlinx-coroutines-reactor-1.5.1.jar:/workspace/BOOT-INF/lib/kotlinx-coroutines-reactive-1.5.1.jar:/workspace/BOOT-INF/lib/kotlinx-coroutines-core-jvm-1.5.1.jar:/workspace/BOOT-INF/lib/slf4j-api-1.7.32.jar:/workspace/BOOT-INF/lib/spring-core-5.3.9.jar:/workspace/BOOT-INF/lib/spring-jcl-5.3.9.jar:/workspace/BOOT-INF/lib/spring-boot-jarmode-layertools-2.5.3.jar com.example.demo.KbootNativeApplicationKt
[INFO]     [creator]     [/layers/paketo-buildpacks_native-image/native-image/com.example.demo.KbootNativeApplicationKt:183]    classlist:   3,477.37 ms,  1.19 GB
[INFO]     [creator]     [/layers/paketo-buildpacks_native-image/native-image/com.example.demo.KbootNativeApplicationKt:183]        (cap):     523.64 ms,  1.19 GB
[INFO]     [creator]     [/layers/paketo-buildpacks_native-image/native-image/com.example.demo.KbootNativeApplicationKt:183]        setup:   2,577.28 ms,  1.19 GB
[INFO]     [creator]     To see how the classes got initialized, use --trace-class-initialization=org.springframework.util.unit.DataSize
[INFO]     [creator]     [/layers/paketo-buildpacks_native-image/native-image/com.example.demo.KbootNativeApplicationKt:183]     analysis:  10,754.71 ms,  1.54 GB
[INFO]     [creator]     Error: Classes that should be initialized at run time got initialized during image building:
[INFO]     [creator]      org.springframework.util.unit.DataSize was unintentionally initialized at build time. To see why org.springframework.util.unit.DataSize got initialized use --trace-class-initialization=org.springframework.util.unit.DataSize
[INFO]     [creator]
[INFO]     [creator]     Error: Use -H:+ReportExceptionStackTraces to print stacktrace of underlying exception
[INFO]     [creator]     [/layers/paketo-buildpacks_native-image/native-image/com.example.demo.KbootNativeApplicationKt:183]      [total]:  17,145.94 ms,  1.54 GB
[INFO]     [creator]     # Printing build artifacts to: /layers/paketo-buildpacks_native-image/native-image/com.example.demo.KbootNativeApplicationKt.build_artifacts.txt
[INFO]     [creator]     Error: Image build request failed with exit status 1
[INFO]     [creator]     unable to invoke layer creator
[INFO]     [creator]     unable to contribute native-image layer
[INFO]     [creator]     error running build
[INFO]     [creator]     exit status 1
[INFO]     [creator]     ERROR: failed to build: exit status 1
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------

Woop Woop Woop

I found it …. the Spring AOT plugin
was missing 🙈

nfrankel

08/15/2021, 3:55 PM

Error: Classes that should be initialized at run time got initialized during image building:
[INFO]     [creator]      org.springframework.util.unit.DataSize was unintentionally initialized at build time. To see why org.springframework.util.unit.DataSize got initialized use --trace-class-initialization=org.springframework.util.unit.DataSize

i’d suggest you to add `

--initialize-at-build-time=org.springframework.util.unit.DataSize

but this is not kotlin related

marzelwidmer

08/15/2021, 3:55 PM

.   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v2.5.3)

2021-08-15 15:54:58.230  INFO 1 --- [           main] o.s.boot.SpringApplication               : Starting application using Java 11.0.12 on df5ff410afff with PID 1 (started by cnb in /workspace)
2021-08-15 15:54:58.230  INFO 1 --- [           main] o.s.boot.SpringApplication               : No active profile set, falling back to default profiles: default
2021-08-15 15:54:58.267  INFO 1 --- [           main] o.s.b.web.embedded.netty.NettyWebServer  : Netty started on port 8080
2021-08-15 15:54:58.268  INFO 1 --- [           main] o.s.boot.SpringApplication               : Started application in 0.05 seconds (JVM running for 0.052)

I forget to configure the

spring-aot-maven-plugin

<!-- TODO -->
			<plugin>
				<groupId>org.springframework.experimental</groupId>
				<artifactId>spring-aot-maven-plugin</artifactId>
				<version>0.10.2</version>
				<executions>
					<execution>
						<id>test-generate</id>
						<goals>
							<goal>test-generate</goal>
						</goals>
					</execution>
					<execution>
						<id>generate</id>
						<goals>
							<goal>generate</goal>
						</goals>
					</execution>
				</executions>
			</plugin>

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