Kotlin is still quite new for Spring developers, but quickly gain traction, I am sure there will be more next year.

@gert.claeskens i beg to differ: http://devdays.lt/nicolas-frankel/

@nfrankel nice, will the video of that talk be available online anytime soon?

Ah, is it the same from voxxed days Belgrade?

yep, it is and no, it has not been recorded

since belgrade, i changed the code if i remember well to demo

all-open

and

noargs

ok, very nice. all-open is unnecesseray if u use the spring-kotlin plugin, 😉

you need the dependency, don’t you?

yes, and when you use the plugin all spring related classes are open by default, without having to declare them in the gradle file

@sdeleuze thanks for your presentation, it was very informative 🙂

I would imagine so… the spring stuff has no reason to even know you’re using Kotlin

I've been doing fine with Spring Boot and Kotlin. You just need the kotlin-noarg classpath in your Gradle file if you want to use Kotlin immutable data classes. You don't even need the kotlin-allopen plugin if you don't mind adding the open keyword to some classes, I do fine without it.

There are some known quirks with Spring Boot run configurations + Kotlin, but other than that everythings works to our knowledge

It should not be any problem, same proxies rules

Some things can't be advised e.g Extension functions

Im ok with that

@j_kapp No need to add the open keyword to Spring related classes when you use the spring-kotlin plugin

@gert.claeskens I definitely have to add

open

to the class annotated with

@SpringBootApplication

and the class annotated with

@Configuration

if I don't use the kotlin-allopen plugin, but not any others that I have discovered so far.

^^ @orangy

That’s awesome… And I just realized that I need someone to make a spring + kotlin logo/emoji so that I can react appropriately

Yeah! 😄 Thanks!

I can convert Map -> json, but when i try to convert it back it doesn't work 😞

Hello everyone! I have a Spring Boot + Koltin app; I'm using WebFlux (just trying it) and the issue is that I can't log anything via Logback/SL4FJ

This is a (very simple) component that I have, for instance:

@Component
class PersonHandler {
  val logger = LoggerFactory.getLogger("PersonHandler")
  //val logger1 = LoggerFactory.getLogger(PersonHandler::class)

  fun create(req: ServerRequest): Mono<ServerResponse> {
    return ServerResponse.ok().build()
  }

  fun findOne(req: ServerRequest): Mono<ServerResponse> {
    logger.debug("{} {}", req.path(), req.method())
    return ServerResponse.accepted().build()
  }
}

...and I'm getting something in the console when Spring Boot starts, so I'm sure it's something wrong I'm doing on my side

OK, my bad 😞 ...looks like this

val logger = LoggerFactory.getLogger("PersonHandler")

doesn't works...sorry!

BTW, is there any way to change this:

val logger = LoggerFactory.getLogger(PersonHandler::class.java)

into something else; why is the

.java

thing in the end required?

@deckard_shaw a KClass is a separate type from a Java Class. getLogger expects Class and not KClass.

Thanks for letting me know...