Anybody used Spring Fu yet? I wanted to give it a try, but from https://github.com/spring-projects/spring-fu/tree/master/modules it seems you can only use that subset of modules which are made ready for Spring Fu. I would like to port a reactive app that is using mongodb and kafka, and I don’t see how to integrate it, but I guess if I really want to I could use the non-spring reactive kafka dependency?

I just asked this question on the getting-started channel, but wanted to share it here in case the right person isn’t on that channel. 🙂

argh! Is there an example somewhere of using the kotlin-noarg plugin? The docs say “Then specify the list of no-arg annotations”. Does this mean that I have to write my own annotation class to be able to use it? I see some references in stackoverflow to people just adding

@NoArg

to their data class, but no information on what other setup is needed to get that to work

The exception is: Instantiation of [simple type, class com.foo.bar.Goalscorer] value failed for JSON property event due to missing (therefore NULL) value for creator parameter event which is a non-nullable type.

How can @NotNull be handled for spring validation. For example in the following request I want spring to check that the fields are not null and send an error if they are.

data class NameRequest(@field:NotNull val firstName: String, @field:NotNull val lastName: String)

But when making the request, I get a 500 server error. java.lang.IllegalArgumentException: Parameter specified as non-null is null: method NameRequest.<init>, parameter firstName", Do all fields have to be marked nullable? I used the spring starter for kotlin which contains the kotlin-jackson dependency.

And we work with GraalVM team to make Spring + Kotlin application working as GraalVM native images

can it only run against kotlin 1.3 Milestone?

Hi ☺️ has anybody here been using spring cloud streams kafka binder, and the metrics you get from spring.cloud.stream.binder.kafka.offset? It’s supposed to give the number of messages not yet consumed on a topic, but is given in milliseconds and I’m not sure how to present these series of metrics in a graph (using grafana). Would be super if someone could help out 🌷

Hi All, I am are currently rewriting a legacy system with Kotlin, Spring boot and JPA and so I have three modules of which two are services and a shared module which includes entities, Utils and repositories etc. Now on the dependent projects main I have used annotations @ComponentScan(value = ["com.bla.mypackage"]) and @EnableJpaRepositories and I can run the services and beans are autowired but when I run tests I get Unsatisfied dependency exception and my testBase is annotated with Test and @ContextConfiguration(classes = [MyService::class]). What could I be missing or doing wrong?

@GetMapping
    fun getIdentities(payload: IdentitySearchRequest, pageable: Pageable) =
        service.searchProcess(payload, pageable)

I`m trying to map the query string of this request to that class. But it doesn`t work. Any idea? Its spring boot

Hi! Yesterday I published a post how to use Mockk to test Spring Boot controllers without Mockito. Please share your thoughts or improvements: https://medium.com/@darych90/kotlin-spring-boot-mockk-6d1c1a6463ac

would it be possible to write a

@MockKBean

annotation (esp. the corresponding processor) that works with MockK instead of Mockito?

Maybe slightly off-topic, but somebody at my company wants to learn Spring/Spring Boot in depth. Are there any courses on Kotlin + Spring that anyone can recommend? (doesnt have to be free)

^-- When I update the sample here to use Kotlin 1.2.71, it fails. Do Spring Boot and Kotlin 1.2 work together?

Why not integrate Exposed with the Spring Data instead? You’re suggesting essentially forking DSLs and fragmenting community

is there any plans to integrate spring transactional model with coroutines?

Hello, I am trying to read properties but it never returns the correct value. This is what I use

@Component
@ConfigurationProperties
@PropertySource("classpath:app.properties")
class AppProperties {
    lateinit var mongoUri: String
    lateinit var manticoreEndpoint: String
    lateinit var manticorePlatform: String
    lateinit var manticoreUsername: String
    lateinit var manticorePassword: String
    lateinit var internalToken: String
}

My properties look like

mongo-uri=""
mantictore-endpoint=""

I also added

@EnableConfigurationProperties

. I missed something? Thanks for your help.

not really kotlin related, but can i use spring persistency on an app thats not spring based? (i want to start using spring components)

BTW I plan to migrate the Spring Boot + Kotlin tuto from JPA to Spring Data JDBC https://github.com/spring-guides/tut-spring-boot-kotlin/issues/17. See for more details.

I'm wondering if the Kotlin team has considered automatically treating Optional<T> like T?

Hello. Me noob here, but Google has no ideas, and slack search neither. Anyone using proguard with kotlin and spring boot gradle plugin 2.x? I'm trying to make it obfuscated during the build and after translation, but no luck to find some task entry point

com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of

com.example.api.LoginEvent

, problem: kotlin/jvm/internal/Intrinsics does anyone know why this error?

Hi there Does anyone use spek for testing spring apps?

I am using Spring MVC with kotlin. In one of my Controller methods, I want to redirect to a internal url if a particular condition is met, else I want to serve a json object. This is my current code (striped down version)

fun serveRequest(response :HttpServletRes)  : ResponseObject?  {
    if(condition_satisfied) {
         response.status = HttpServletResponse.SC_MOVED_PERMANENTLY
            response.sendRedirect("/new_path")
            return null
    } else {
       return Responsebject()
   }
}

This gives me 2 problems : 1. even if the response status is explicitly set 301 , it returns 302 2. The code looks a bit "hacky" to me, getting a feeling that better code can be possible.

Anyone else having issues with

Could not find org.jetbrains.kotlin:kotlin-spring

in gradle? I followed the docs here: https://kotlinlang.org/docs/reference/compiler-plugins.html

In Spring, what is the simplest way to convert a

List

to a

Page

using

Pageable

? My understand of

PageImpl(List<T> content, Pageable pageable, long total)

is that it does not slice up the list content as was requested in

Pageable

. It also does not apply the

Pageable.sort

to the content list.

I have the following, but it does not take Pageable.sort into account

fun <T> List<T>.toPage(pageable : Pageable) : Page<T> {
    val content = when {
        (pageable.offset < size) -> subList(pageable.offset, minOf(pageable.offset + pageable.pageSize, size))

        else -> emptyList()
    }
    return PageImpl(content, pageable, size.toLong())
}

at some point down the stack (

KotlinCopyMethod.java

) I get a call to this method

private static Optional<Method> findSyntheticCopyMethod(Class<?> type) {

		return Arrays.stream(type.getDeclaredMethods()) //
				.filter(it -> it.getName().equals("copy$default") //
						&& Modifier.isStatic(it.getModifiers()) //
						&& it.getReturnType().equals(type))
				.filter(Method::isSynthetic) //
				.findFirst();
	}

but

type.getDeclaredMethods()

contains

public static Masterplan Masterplan.copy-Tarbdzk$default(Masterplan,java.lang.Integer,java.lang.String,java.lang.String,java.lang.String,java.lang.String,int,java.lang.Object)

->

Tarbdzk

????