If I have this as my configuration properties:

kotlin
@ConstructorBinding
@ConfigurationProperties("company")
class UsersProperties(val users: Map<String, User>) {
    data class User(
        val password: String,
        val companyName: String,
        val accounts: List<String>
    )
}

and this in my application.yaml

yaml
company:
  users:
    <mailto:admin@email.com|admin@email.com>:
      password: admin
      companyName: Company 1
      accounts: [ "ACC1", "ACC2" ]
    <mailto:user@user.com|user@user.com>:
      password: user
      companyName: Company 2
      accounts: [ "ACC3", "ACC4" ]

spring complains that

users

property can't be null Any idea? Thanks in advance

Hi I'm writing an API in Spring boot / kotlin / functional router (

coRouter

) with coroutines ... Can someone point me to Spring security configuration for such a stack? Thanks! I'm using pretty much the latest Spring Boot

Hi, mb in this channel somebody could help me 😃 https://kotlinlang.slack.com/archives/C1CFAFJSK/p1605103613045600 I have a problem with retrieving a reactor context in suspend function (in general in spring webflux in route suspend function). Base example from docs doesn’t work, but I found that context could be retrieved by

val context = Mono.deferWithContext { ctx -> Mono.just(ctx) }.awaitFirst()

. Is it a right solution ?

Spring Boot 2.4.0 reference documentation doesn't say a word about kotlinx.serialization support. Is it supported? How to use it?

class reactor.core.publisher.MonoOnErrorResume cannot be cast to class org.springframework.web.servlet.function.ServerResponse (reactor.core.publisher.MonoOnErrorResume and org.springframework.web.servlet.function.ServerResponse are in unnamed module of loader ‘app’)

Anyone else got this during unit tests when using runBlocking after updating to Spring Boot 2.4.0? I’m currently investigating why all tests fail once runBlocking is used.

If you use Kotlin and MockK and want to enjoy nested Spring Boot tests, I just released SpringMockK 3.0.0. https://github.com/Ninja-Squad/springmockk/releases/tag/3.0.0.

Speak personal, all right? Does anybody have an example of a project with coroutines with Spring? If someone helps me I will be grateful...😀

Hi, how can I implement spring security with jwt in rest api without using role (only user)? Passing authories as

null

in

UsernamePasswordAuthenticationToken(userDetails, "", userDetails.authorities)

gives error as authorities can not be null . Any tutorial or help is appreciated.

Hello, I'm a former python webdev new to kotlin trying to get started on spring boot. However, I find the resources severely lacking. There were a single kotlin spring boot documentation in the official tutorials and I have failed to follow through because it omitted a lot of import statements( in which I only can guess that it should be obvious from the context). Now I am curious, is it possible to learn spring boot right away with kotlin or should I go learn spring boot in java and try to translate that into kotlin?

I can render the

index.html

when I visit

<http://localhost:8080/index.html>

but what I would like to do is render the

index.html

when I visit

<http://localhost:8080/>

. Any insight would be helpful. Thanks!

has anyone successfully been able to use the spring boot gradle plugin in a kotlin multiplatform project?

hi everyone, any book that you can recommend me about spring boot with kotlin?

Maybe not the type of questions for this channel but does anybody know of a course where we can learn from the basics to advance spring boot but with Kotlin? All there is is java 😞

Hey everyone, maybe there's someone who can guide me to the solution of the following problem: Let's say I have the following dto defined:

@Serializable
class RouteDto(
        val id: Int? = null,
        val template: Template?,
        val server: Server?,
        val variables: List<Variable>,
        val name: String,
        val active: Boolean,
        val profile: Profile,
        val description: String
)

And I have the following endpoint:

@RestController
@RequestMapping("/routes")
class RouteController(
    @PostMapping("/new")
    fun createRoute(routeDto: RouteDto): ResponseEntity<RouteDto?> {
        val route = saveRouteService.saveRouteFrom(routeDto)
        val dto: RouteDto = route.id?.toDto() ?: return ResponseEntity.unprocessableEntity().build()

        return ResponseEntity.ok(dto)
    }

Now I just wanted to call it like that with mockMvc:

@Test
    fun `should create a route`() {
        val dto = RouteDto(null, null, null, listOf(),"testDto", true, Profile.DEV, "should create a route test")
        <http://mockMvc.post|mockMvc.post>("/routes/new") {
            contentType = MediaType.APPLICATION_JSON
            content = Json.encodeToString(dto)
        }.andExpect {
            status { is2xxSuccessful() }
        }
    }

However, I get the following Warning:

DefaultHandlerExceptionResolver : Resolved [org.springframework.validation.BindException: org.springframework.validation.BeanPropertyBindingResult: 1 errors
Field error in object 'routeDto' on field 'active': rejected value [null]; codes [typeMismatch.routeDto.active,typeMismatch.active,typeMismatch.boolean,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [routeDto.active,active]; arguments []; default message [active]]; default message [Failed to convert value of type 'null' to required type 'boolean'; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [null] to type [boolean] for value 'null'; nested exception is java.lang.IllegalArgumentException: A null value cannot be assigned to a primitive type]]

Spring seems to fail at reading the Boolean value

active

, which is actually correctly serialized:

MockHttpServletRequest:
      HTTP Method = POST
      Request URI = /routes/new
       Parameters = {}
          Headers = [Content-Type:"application/json;charset=UTF-8", Content-Length:"136"]
             Body = {"template":null,"server":null,"variables":[],"name":"testDto","active":true,"profile":"DEV","description":"should create a route test"}
    Session Attrs = {}

It would be great if someone could point me in a helpful direction. Thanks in advance!

Or on the contrary: which dependency MUST NOT be found on the calsspath in order for webflux/coroutines to work properly?

I’m trying to set up a data source for a H2 embedded database in a Spring project, but when I try to log in via https://localhost:8080/h2-console there’s no way I can log in as it says the DB is not created. Nevertheless when I type the properties manually in the 

application.properties

 it works 😞. Also, I’d like to insert some data into a table in that DB as soon as the app is started. I created some insert statements into a 

data.sql

 file in the 

resources

file but I nothing is inserted (edited)

Is there a single resource for learning Spring?

is there any documentation on how to fully use coroutines+Spring (reactive)? What i do know is that in principal everything should work. but when it comes to db transactions or spring security i feal unsure about how to handle the reactor Context, how it interacts with the corouting context and what i do have to do in order everything works or what does already work ootb.

Hoping someone might be able to help identify the reason why this code might be breaking. I’m trying to use the

ReactiveRedisTemplate

from the reactive Redis starter.

val template = ReactiveStringRedisTemplate(connectionFactory)
template.opsForValue().get("123").subscribe { println("get: $it") } // works! prints: "get: ..."

runBlocking {
  val value = template.opsForValue().get("123").awaitFirst() // fails! connection timeout????
  println("get: $value")
}

I’m not sure if this is a coroutines specific issue but

awaitFirst

works when converting other fluxes.

What's the best resource to get started with Spring Boot in Kotlin? (I'm brand new to Spring)

How do replace kotlinx.serialization with jackson again?

Hi, I'm using #kotlinx-datetime in Spring, how can I write a converter to convert an

Instant

or

LocalDateTime

to mysql Datetime and Timestamp?

hi there, I'm trying to use the kotlin-coroutines with Spring Boot, and everything seems to work nice util I add the

@Transactional

annotation to one of my spring service's method. After the annotation is added some classCastException is thrown, see the details here: https://stackoverflow.com/questions/65331458/classcastexception-monoonerrorresume-cannot-be-cast-to-class-io-ebean-query Is there a howto on how to use the kotlin-coroutines with spring transactions? thanks,

I'm using spring webflux

WebFilter

with kotlin coroutines, currently the only way I can run

suspend function

in

filter

function is using

runBlocking

. Is there a better way for calling a suspend function in that case?

This is not a small change and no promise we will do it, but if enough people push for it we may consider it, so please add your 👍 if you care https://github.com/spring-projects/spring-framework/issues/21546

Hello have somebody maybe already a spring boot starter with kotlin

1.4.21

and spring

2.4.1

on place.. with kotlin gradle .

kts

I am new in gradle

Any other platform to deploy spring boot app for free besides Heroku?

Hi! I’m new in spring and I need advice. 🙏 I have a user (entity) which has many user cards (entities). I need to implement authentication and authorization. A user has one user card in an organization, which store his permissions. What should extend of UserDetails - User or UserCard? 🙏