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# getting-started
h
huehnerlady
07/03/2020, 3:54 PMHI,
I am quite new to kotlin. I have currently an generated Java interface containing spring Requestmapping annotations and extend this in my kotlin project.
This works fine and the annotations are picked up and processed.
When I generate the same interface as a kotlin interface though, these annotations seem to be ignored.
Do I have to configure something to make this work?
✔️ 1
m
Margarita Bobova
07/08/2020, 6:06 AM@huehnerlady Hello! Could you please share the code example?
h
huehnerlady
07/09/2020, 8:50 AM@Margarita Bobova thanks for asking.
So when I have a spring @RestController class and in there a method test like so:
Copy code
@RequestMapping(
value = ["/test/{testId}"],
produces = ["application/json"],
method = [RequestMethod.GET])
fun test( @PathVariable("testId") testId: String): ResponseEntity<String> {
return ResponseEntity.ok(testId)
} Copy code
@Validated
@RequestMapping("\${api.base-path:/v2/test}")
interface TestApi {
@RequestMapping(
value = ["/test/{testId}"],
produces = ["application/json"],
method = [RequestMethod.GET])
fun test( @PathVariable("testId") testId: kotlin.String
): ResponseEntity<String> {
return ResponseEntity(HttpStatus.NOT_IMPLEMENTED)
}
} Copy code
override fun test( @PathVariable("testId") testId: String): ResponseEntity<String> {
return ResponseEntity.ok(testId)
}m
Margarita Bobova
07/09/2020, 11:10 AM@huehnerlady Thank you. I tried the same with java and get 404 too, so it seems like a Spring bug or restriction. Try to use
@GetMapping@RequestMappingh
huehnerlady
07/09/2020, 11:20 AM@Margarita Bobova could you maybe share a code snippet? For me a swap of RequestMapping to GetMa[pping does not resolve it 😞
With Java it does work though … 🤔
this is the generation of java:
Copy code
@RequestMapping(value = "/test/{testId}",
produces = { "application/json" },
method = RequestMethod.GET)
default ResponseEntity<String> test(@PathVariable("testId") String testId) {
getRequest().ifPresent(request -> {
for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
String exampleString = "null";
ApiUtil.setExampleResponse(request, "application/json", exampleString);
break;
}
}
});
return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
} Copy code
override fun test(testId: String?): ResponseEntity<String> {
return ResponseEntity.ok(testId?: "")
}m
Margarita Bobova
07/09/2020, 11:36 AM@huehnerlady Here is a java project, changing to
@GetMappingReally, for Kotlin changing to
@GetMappingh
huehnerlady
07/09/2020, 11:45 AMI see, ok thank you. As said with a java interface it also wprks in kotlin with the @RequestMapping, it is just if the interface is also groovy 🙂
I strive to have a 100% kotlin service, and currently this problem is one of the obstacles I have to overcome 😞
m
Margarita Bobova
07/09/2020, 2:44 PM@huehnerlady the following code works for me:
Copy code
import org.springframework.http.ResponseEntity
import org.springframework.stereotype.Controller
import org.springframework.web.bind.annotation.*
@Controller
class Controller : TestApi {
override fun test(@PathVariable("testId") testId: String): ResponseEntity<String> {
return ResponseEntity.ok(testId)
}
} Copy code
import org.springframework.http.HttpStatus
import org.springframework.http.ResponseEntity
import org.springframework.validation.annotation.Validated
import org.springframework.web.bind.annotation.PathVariable
import org.springframework.web.bind.annotation.RequestMapping
import org.springframework.web.bind.annotation.RequestMethod
@Validated
@RequestMapping("/api")
interface TestApi {
@RequestMapping(
value = ["/test/{testId}"],
produces = ["application/json"],
method = [RequestMethod.GET])
fun test( @PathVariable("testId") testId: kotlin.String
): ResponseEntity<String> {
return ResponseEntity(HttpStatus.NOT_IMPLEMENTED)
}
}h
huehnerlady
07/09/2020, 2:53 PMhmm odd, for me I still get the 404 😞
I am using spring boot 2.2.6 and Spring 5.2.5. which version are you using?
m
Margarita Bobova
07/09/2020, 2:54 PMspring boot 2.3.1
h
huehnerlady
07/09/2020, 2:54 PMok, will upgrade and have a look if that is the problem
m
Margarita Bobova
07/09/2020, 2:54 PMcould you please share the project?
h
huehnerlady
07/09/2020, 2:55 PMunfortunately this is a closed project, so not easy to share. but if the spring upgrade does not work I will provide a sample project
m
Margarita Bobova
07/09/2020, 2:56 PMyes, sample project would be great! The problem reproduced for me before, but doesn’t reproduce now
👍🏻 1
h
huehnerlady
07/09/2020, 3:41 PMI tried to make a simple sample project but there it works. So I need to dive deeper into the code I guess, but for me it is very valuable to know, that it should work this way, so many many thanks for your help 🙂
👍 1
@Margarita Bobova I got it to work, it was a red hering as the kotlin-spring generator behaves differently from what they generate than the java-spring generator, that is why I had the problems. this is solved now.
The problem was, that the spring generator does not generate a requestMapping on Controller level, the kotlin-spring generator does. Therefore the endpoint was not available at the point I was expecting, but at a different path
Many many thanks 👍🏻
m
Margarita Bobova
07/17/2020, 7:14 AMThank you :)
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