Kotlin autowired in spring

Question

I'm pretty new to kotlin but done some extensive java before...

I tried to use kotlin and java in the same project but it looked very ugly and I didn't like that my classes were separated into two places. So now my project is 100% kotlin and there are problems...

I keep getting this error message:

lateinit property serviceX has not been initialized

I understand it means that service is not initialized yet, but how do i do initialized it then?

with java and spring, I did @Autowired or injected services in the constructor and was done.

what I need is for my REST to be able to use serviceX

@Component
@Path("/super")
open class SuperRest : BaseRest() {

@PUT
@Path("/test")
fun putTest(
        @Context securityContext: SecurityContext,
        @NotNull selected: String
) {
    val user = serviceX(securityContext)
   }

}

and in BaseRest I have tried to autowire serviceX first, it was:

    @Autowired
    protected lateinit var serviceX: ServiceX

then it was just

    @Autowired
    lateint var serviceX: ServiceX

then I tried other solutions I found in SO

open class BaseRest @Autowired constructor(
    private val serviceX: ServiceX
) { ... }

Why is this? I can still use other @autowired services in my rest just fine. Just when I try to use them from BaseRest extension i will get

lateinit property serviceX has not been initialized

even without any lateinit property, i still somehow get this error..

private var serviceX: ServiceX = ServiceX()

it is still somehow not initialized, please help

Answer 1

Not sure to understand the

Just when I try to use them from BaseRest extension i will get

part, but here is the code I came across and it's working fine as expected.

open class BaseRest {
  @Autowired
  protected lateinit var serviceX: ServiceX

  fun baseFun() {
      serviceX.serviceFun(SecurityContextImpl())
  }
}

@Component
open class SuperRest : BaseRest() {

  fun putTest(
    securityContext: SecurityContext,
    @NotNull selected: String
  ) {
    baseFun()
    val user = serviceX.serviceFun(securityContext)
  }
}

Bonus question : Why do you use @PUT and @Path("/test") annotations and not @PutMapping("/test") ?