kotlinlang #spring

I had a similar issue. Given that the exception happens during initialization of the HttpMessageConverter, I think the Problem is with Jackson. Boot 1.5.9 provides Jackson 2.8.10 – I suggest you try upgrading to Jackson 2.9.2. That solved the issue for me.

👍 3

lex

12/27/2017, 3:44 AM

@fabricio hi, can you show logs and error?

dariuszbacinski

01/10/2018, 3:45 PM

I am using something like this to make any() matcher work with Kotlin:

fun <T> anyObject(): T {
    Mockito.any<T>()
    return uninitialized()
}

private fun <T> uninitialized(): T = null as T

Sola

01/17/2018, 8:46 AM

I'm using kotlin-spring plugin and still get this error, but

@RestController

@Configuration

works fine for me

dstarcev

01/17/2018, 10:42 AM

It works when I start it with

./gradlew bootRun

, but still fails when I start it from IDEA

megax

01/17/2018, 6:57 PM

@Around(" execution(hu..web.sync.controller.SomeController *(..))")
    fun auditInfo(joinPoint: ProceedingJoinPoint) {/*never arrive here*/}

dharrigan

01/18/2018, 11:29 AM

plugins {                                                                                                                                                            
    val kotlinVersion = "1.2.20"                                                                                                                                     
    val springBootVersion = "1.5.9.RELEASE"                                                                                                                          
    val springDependencyManagementVersion = "1.0.4.RELEASE"                                                                                                          
                                                                                                                                                                     
    idea                                                                                                                                                             
    kotlin("jvm") version kotlinVersion                                                                                                                              
    id("io.spring.dependency-management") version springDependencyManagementVersion                                                                                  
    id("org.jetbrains.kotlin.plugin.spring") version kotlinVersion                                                                                                   
    id("org.springframework.boot") version springBootVersion                                                                                                         
}

Jacol

01/24/2018, 11:27 AM

@Pawel Urban 1. I have installed JDK1.8

C:\Program Files\Java>java -version
java version "1.8.0_161"
Java(TM) SE Runtime Environment (build 1.8.0_161-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.161-b12, mixed mode)

C:\Program Files\Java>echo %JAVA_HOME%
C:\Program Files\Java\jdk1.8.0_161

2. my gradle

buildscript {
	ext {
		kotlinVersion = '1.2.10'
		springBootVersion = '2.0.0.M7'
	}
	repositories {
		mavenCentral()
		maven { url "<https://repo.spring.io/snapshot>" }
		maven { url "<https://repo.spring.io/milestone>" }
	}
	dependencies {
		classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
		classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlinVersion}")
		classpath("org.jetbrains.kotlin:kotlin-allopen:${kotlinVersion}")
	}
}

apply plugin: 'kotlin'
apply plugin: 'kotlin-spring'
apply plugin: 'eclipse'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'

group = 'pl.app'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = 1.8
compileKotlin {
	kotlinOptions.jvmTarget = "1.8"
}
compileTestKotlin {
	kotlinOptions.jvmTarget = "1.8"
}

repositories {
	mavenCentral()
	maven { url "<https://repo.spring.io/snapshot>" }
	maven { url "<https://repo.spring.io/milestone>" }
}


dependencies {
	compile('org.springframework.boot:spring-boot-starter-data-jpa')
	compile('org.springframework.boot:spring-boot-starter-web')
	compile('org.springframework.boot:spring-boot-starter-webflux')
	compile("org.jetbrains.kotlin:kotlin-stdlib-jre8")
	compile("org.jetbrains.kotlin:kotlin-reflect")
	runtime('com.h2database:h2')
	testCompile('org.springframework.boot:spring-boot-starter-test')
	testCompile('io.projectreactor:reactor-test')
}

Pawel Urban

01/24/2018, 11:38 AM

./gradlew eclipse

and then open the project

Jacol

01/24/2018, 11:46 AM

when I use intellij

Outdated Kotlin Runtime
			Your version of Kotlin runtime in 'Gradle: org.jetbrains.kotlin:kotlin-stdlib:1.1.61' library is 1.1.61-release-68 (1.1.61), while plugin version is 1.2.20-release-IJ2017.3-1.
			Runtime library should be updated to avoid compatibility problems.

but this running 🙂

fabricio

01/24/2018, 8:21 PM

even If I remove all the configuration in the .yml I still get the error

ken.siprell

01/26/2018, 3:47 PM

Could someone take a look at my repo here: https://github.com/kensiprell/kotlin-spring-security? To summarize the README, I’m trying to use a

BCryptPasswordEncoder

bean to encode passwords, but whenever I create the bean, it breaks authentication. The details are in the repo’s README. Thanks!

hho

01/28/2018, 1:38 PM

@fabricio @sdeleuze I had the exact same issue with 1.2.20 (Data source config not found) – the culprit seems to be the incremental compilation of the Kotlin compiler. It wipes the resources directory during compilation, so when you run the final JAR no properties/yaml are found. https://youtrack.jetbrains.com/issue/KT-21581 (& Duplicates)

kruczaj

01/29/2018, 4:58 PM

Hey. I'm sending notification for users via WebSocket, but previously I need to fetch some data from DB. I was thinking about doing both processes asynchronously, but I'm not sure if that is proper way of doing that.

launch(CommonPool) {
			sendNotifications(updatedItemsIds) // fetch data and send notification via WS
		}

Any thoughts on that?

kruczaj

01/29/2018, 4:59 PM

Maybe I should play around with

@Async

from Spring if that is better approach.

starbuxman

02/04/2018, 6:44 AM

I learned something yesterday:

@get:Bean val foo=Foo()

👍 3

chintanshah

02/05/2018, 7:33 AM

Anyone knows why

@RequestParam("size", required = false) size: Int = 5

does not give

size

a default value?

dstarcev

02/06/2018, 11:12 AM

how do I check that a compiler plugin is applied when building via IDEA or with

./gradlew build

Martin Schwitalla

02/08/2018, 6:39 PM

I have a question. At work we are currently experimenting with Kotlin and Spring Boot. One of the nice things of Java and Spring Boot was, that if you had something like "public interface EventProcessor<T>" in Java you could autowire a list of classes that implement that interface. While trying to do this today with Kotlin it didn't work. Why is that so? And is there an alternative to do a similar thing "the kotlin way"? Currently we just transform the object and based on the type we execute a different processor. This is done via a "when (x)..." but that isn't as nice.

Martin Schwitalla

02/08/2018, 7:01 PM

aaaah, so you can do something like <*>?

Kaj

02/08/2018, 7:38 PM

Does anyone know how I can let my Spring controller return a 404? I thought I could just return a nullable variable and if it is null Spring would translate it to a 404. Do I really need to use

ResponseEntity

specifically?

dh44t

02/09/2018, 10:41 AM

My suggestion for now is too use an extension function

fitzoh

02/12/2018, 2:20 PM

Hey, for anyone using/interested in spring-cloud-contract, there’s an open issue/ongoing work on adding a kotlin DSL, take a look and add a comment if you have any feedback: https://github.com/spring-cloud/spring-cloud-contract/issues/434

sdeleuze

02/13/2018, 10:57 AM

@soudmaijer Done https://github.com/spring-cloud/spring-cloud-contract/issues/434#issuecomment-365229140

bkenn

02/13/2018, 8:29 PM

With the Spring Boot JPA, how can I tell Spring to use a .hbm.xml to declare a managed type and not use annotations? I have tried `spring.jpa.properties.hibernate.mappingLocations = classpath:/hibernate/.hbm.xml` but I still receive a

Caused by: java.lang.IllegalArgumentException: Not a managed type: class com.github.bkenn.jpafx.model.Vendor

exception.

:stackoverflow: 1

leodeng

02/14/2018, 8:14 PM

i usually use

@Autowired lateinit var dependency: Dependency

➕ 4

sdeleuze

02/15/2018, 8:47 AM

@ConfigurationProperties("foo")
class FooProperties {
	lateinit var foo1: String
	lateinit var foo2: String
	lateinit val bar = Bar()

	class Bar {
		lateinit var bar1: String
		lateinit var bar2: String
	}
}

sdeleuze

02/15/2018, 11:11 AM

Oh and feel free to submit Spring + Kotlin talks at https://www.kotlinconf.com/ (I won't submit myself)

kenkyee

02/15/2018, 11:19 AM

That image is wrong..lol... from 2017

Pere Casafont

02/26/2018, 3:11 AM

in jpa, do you think it is a good choice to have not nullable primitive column attributes annotated with

? I use lateinit with non primitives, but I'm kind of uncomfortable having to initialize my ids to 0 or -1

Title

Pere Casafont

02/26/2018, 3:11 AM

in jpa, do you think it is a good choice to have not nullable primitive column attributes annotated with

? I use lateinit with non primitives, but I'm kind of uncomfortable having to initialize my ids to 0 or -1

lovis

02/26/2018, 12:06 PM

i’d go for

, since you’ve got language features at hand to deal with it (

?.

!!

), while

-1

are kind of obscure.

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