[Livro Rest com Kotlin] - Excessão Hateoas

Livros
1

Ao final do capítulo 3 temos uma implementação da lib de hateoas do spring. Porém seguindo a implementação do livro acabo por tomar essa exceção ao tentar criar uma travelRequest:
Alguém também passou por isso?

{
    "timestamp": "2022-09-08T20:15:40.431+00:00",
    "status": 500,
    "error": "Internal Server Error",
    "trace": "java.lang.IllegalArgumentException: Object of class [kotlin.reflect.jvm.internal.KClassImpl] must be an instance of interface org.springframework.hateoas.server.core.LastInvocationAware\n\tat org.springframework.util.Assert.instanceCheckFailed(Assert.java:702)\n\tat org.springframework.util.Assert.isInstanceOf(Assert.java:602)\n\tat org.springframework.util.Assert.isInstanceOf(Assert.java:633)\n\tat org.springframework.hateoas.server.core.WebHandler.linkTo(WebHandler.java:93)\n\tat org.springframework.hateoas.server.core.WebHandler.linkTo(WebHandler.java:85)\n\tat org.springframework.hateoas.server.mvc.WebMvcLinkBuilderFactory.linkTo(WebMvcLinkBuilderFactory.java:152)\n\tat org.springframework.hateoas.server.mvc.WebMvcLinkBuilder.linkTo(WebMvcLinkBuilder.java:192)\n\tat br.com.car.mapper.TravelRequestMapper.buildOutputModel(TravelRequestMapper.kt:43)\n\tat br.com.car.controllers.TravelRequestAPI.makeTravelRequest(TravelRequestAPI.kt:26)\n\tat java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n\tat java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n\tat java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n\tat java.base/java.lang.reflect.Method.invoke(Method.java:566)\n\tat org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)\n\tat org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)\n\tat org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)\n\tat org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)\n\tat org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1070)\n\tat org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)\n\tat org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:681)\n\tat org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:764)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\n\tat org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\n\tat org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\n\tat org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)\n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)\n\tat org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)\n\tat org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)\n\tat org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890)\n\tat org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1789)\n\tat org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)\n\tat org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)\n\tat org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)\n\tat org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)\n\tat java.base/java.lang.Thread.run(Thread.java:829)\n",
    "message": "Object of class [kotlin.reflect.jvm.internal.KClassImpl] must be an instance of interface org.springframework.hateoas.server.core.LastInvocationAware",
    "path": "/travelRequests"
}
2

Tive o mesmo problema que você, e acabei dando uma olhada no código do autor no github. Parece que faltou um trecho de código na linha 48 do arquivo TravelRequestMapper.kt, no método buildOutputModel. O correto é:

    fun buildOutputModel(travelRequest: TravelRequest, output: TravelRequestOutput): EntityModel<TravelRequestOutput> {

        val passengerLink = WebMvcLinkBuilder
            .linkTo(PassengerAPI::class.java)
            .slash(travelRequest.passenger.id)
            .withRel("passenger")
            .withTitle(travelRequest.passenger.name)

        return EntityModel.of(output, passengerLink)
    }

Link para o repositório

3

Oi, pessoal, bom dia!

Realmente, parece que cometí um equívoco ao escrever esta parte do livro. O correto realmente é PassengerAPI::class.java.

Isso pode, inclusive, ser observado no repositório oficial do livro: rest-kotlin/TravelRequestMapper.kt at master · alesaudate/rest-kotlin · GitHub

Já submetí a correção para a Casa do Código. Caso vocês tenham dúvidas a respeito, podem entrar em contato diretamente comigo, por aqui, ou com o pessoal da editora.

Obrigado!