RuntimeHintRegistrar error bean registration

[Kotlin-GDE]

hi,

 .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v3.0.6)

2023-04-26T10:11:02.074+01:00  INFO 5647 --- [           main] d.halim.springboot.SpringApplicationKt   : Starting SpringApplicationKt using Java 19.0.1 with PID 5647 (/home/halim/Software/My Projects/springboot/build/classes/kotlin/main started by halim in /home/halim/Software/My Projects/springboot)
2023-04-26T10:11:02.078+01:00  INFO 5647 --- [           main] d.halim.springboot.SpringApplicationKt   : No active profile set, falling back to 1 default profile: "default"
2023-04-26T10:11:03.842+01:00  INFO 5647 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data R2DBC repositories in DEFAULT mode.
2023-04-26T10:11:03.877+01:00  INFO 5647 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 27 ms. Found 0 R2DBC repository interfaces.
Exception in thread "main" java.lang.IllegalArgumentException: Code generation is not supported for bean definitions declaring an instance supplier callback : Root bean: class [org.springframework.aot.hint.RuntimeHintsRegistrar]; scope=singleton; abstract=false; lazyInit=true; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodNames=null; destroyMethodNames=null

[bclozel]

This is due to an intentional change in Spring Framework 6.0.5, see #29556. We're planning on improving the situation with #29555. I'm surprised you're getting this error for RuntimeHintsRegistrar. Could you share a sample application?

[Kotlin-GDE]

i use spring 6.0.8, boot 3.0.6, kotin 1.8.20, java 19.0.1

data class Person(val id: Int, val name: String)

fun main() {
    runApplication<SpringApplication>() {
        addInitializers(beans {
            bean<RuntimeHintsRegistrar> {
                RuntimeHintsRegistrar { hints, _ ->
                    hints.reflection().registerType(Person::class.java, MemberCategory.DECLARED_FIELDS, MemberCategory.INVOKE_DECLARED_METHODS)
                }
            }
        })
    }
}

@SpringBootApplication
class SpringApplication {

    @Bean
    fun router() = coRouter {
        val stream = flow {
            emit(Person(1, "a"))
            emit(Person(2, "b"))
            emit(Person(3, "c"))
        }.onEach { delay(300) }

        GET("/") { ok().bodyValueAndAwait("hi") }
        GET("/flow/json") { ok().contentType(MediaType.APPLICATION_NDJSON).bodyAndAwait(stream) }
    }
}

when try to generate native executable with gradle (gradle nativeCompile) exception appear

[snicoll]

Looking at your code, it's obvious that the RuntimeHintsRegistrar bean should be ignored. However, defining the registrar as a bean is not supported. We try as much as possible to make sure that components that need to be instantiated at build time are separate. Only bean factory processing-related contracts are instantiated.

See the reference guide for the recommended approaches. Please use @ImportRuntimeHints, typically on your router function.

[mmarimuthu]

How do we fix for a java application. any code samples would help.

[bclozel]

The linked reference docs have a few.