does anyone have an example of a custom `TokenValidator` in kotlin? struggling a bit with `Type mism...

# micronaut

[reik.schatz]

does anyone have an example of a custom TokenValidator in kotlin? struggling a bit with Type mismatch, Type inference failed for Flowable and Publisher

[Shawn A]

An example of your current code would be helpful.

[reik.schatz]

sure hang on 🙂

[reik.schatz]

so I have this class BouncerAuthentication: Authentication

[reik.schatz]

and

[reik.schatz]

@Singleton
@Requires(notEnv = [ Environment.TEST ])
@Replaces(JwtTokenValidator::class)
class BouncerTokenValidator(): TokenValidator {
    private val logger = KotlinLogging.logger {}

    override fun validateToken(token: String?): Publisher<Authentication> {
        return if (token != null) {
            try {
                Flowable.just(BouncerAuthentication())
            } catch (e: BouncerAccountFacadeException) {
                logger.error(e) { "Exception using authgateway" }
                Flowable.empty()
            }
        } else {
            logger.trace { "Token is missing" }
            Flowable.empty()
        }
    }
}

[reik.schatz]

BouncerTokenValidator.kt: (24, 13): Type mismatch: inferred type is Flowable<BouncerAuthentication!> but Publisher<Authentication> was expected

[reik.schatz]

BouncerTokenValidator.kt: (28, 26): Type inference failed: Not enough information to infer parameter T in fun <T : Any!> empty(): Flowable<T!>!

[reik.schatz]

I get it to compile with a lot of verbosity, i.e. changing to Flowable.empty<Authentication>()

[Shawn A]

It might be worth asking in the #general channel as it seems general enough.