Servicio Spring RESET de arranque: la deserialization de JSON no funciona
Estoy trabajando en un service REST usando spring-boot y Kotlin. (Debo mencionar que es la primera vez que uso ambos). Tengo problemas para lograr que Jackson deserialice JSON de una request POST utilizando este código:
@RequestMapping("cloudservice/login/{uuid}", method = arrayOf(RequestMethod.POST)) fun login(@PathVariable(value="uuid")uuid: String, @RequestBody user: CloudServiceUser ) : ResponseEntity<CloudServiceUser> { val cloudServiceFactory : Class<CloudServiceFactory> = cloudServiceRepository.cloudServiceExtensions[UUID.fromString(uuid)] ?: throw InvalidPathVariableException("Invalid UUID.") var token : String try { token = cloudServiceFactory.newInstance().authenticationService.login(user.userId, user.password) } catch (e:Exception ){ throw CloudServiceException(e.message) } return ResponseEntity(CloudServiceUser(userId=user.userId, password = "", token = token),HttpStatus.OK) }
El object de usuario es simplemente:
- ¿Por qué esta aplicación Spring Boot no puede encontrar la página principal?
- Instant no se puede serializar al formatting apropiado incluso con jackson-datatype-jsr310
- Kotlin: ejecuta una testing de integración, el error `diversión principal ya está definido`
- Spring Boot: no puede include recurso estático
- El file spring-configuration-metadata.json no se genera en IntelliJ Idea for Kotlin @ConfigurationProperties class
data class CloudServiceUser(val userId: String, val password:String, val token:String)
Me sale el error
org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Can not construct instance of com.irotsoma.cloudbackenc.cloudservice.CloudServiceUser: no suitable constructor found, can not deserialize from Object value (missing default constructor or creator, or perhaps need to add/enable type information?) at [Source: java.io.PushbackInputStream@682b15d6; line: 1, column: 2]; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of com.irotsoma.cloudbackenc.cloudservice.CloudServiceUser: no suitable constructor found, can not deserialize from Object value (missing default constructor or creator, or perhaps need to add/enable type information?) at [Source: java.io.PushbackInputStream@682b15d6; line: 1, column: 2] at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:229) ~[spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.read(AbstractJackson2HttpMessageConverter.java:213) ~[spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:197) ~[spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:147) ~[spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:125) ~[spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:99) ~[spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:161) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:128) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:832) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:743) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:961) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:895) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:869) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:648) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843) [spring-webmvc-4.2.6.RELEASE.jar:4.2.6.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.0.33.jar:8.0.33] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration$ApplicationContextHeaderFilter.doFilterInternal(EndpointWebMvcAutoConfiguration.java:261) [spring-boot-actuator-1.3.5.RELEASE.jar:1.3.5.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:115) [spring-boot-actuator-1.3.5.RELEASE.jar:1.3.5.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:87) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:103) [spring-boot-actuator-1.3.5.RELEASE.jar:1.3.5.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1502) [tomcat-embed-core-8.0.33.jar:8.0.33] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1458) [tomcat-embed-core-8.0.33.jar:8.0.33] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_92] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_92] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.0.33.jar:8.0.33] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_92] Caused by: com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of com.irotsoma.cloudbackenc.cloudservice.CloudServiceUser: no suitable constructor found, can not deserialize from Object value (missing default constructor or creator, or perhaps need to add/enable type information?) at [Source: java.io.PushbackInputStream@682b15d6; line: 1, column: 2] at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:261) ~[jackson-databind-2.8.0.jar:2.8.0] at com.fasterxml.jackson.databind.DeserializationContext.instantiationException(DeserializationContext.java:1420) ~[jackson-databind-2.8.0.jar:2.8.0] at com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1011) ~[jackson-databind-2.8.0.jar:2.8.0] at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1201) ~[jackson-databind-2.8.0.jar:2.8.0] at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:314) ~[jackson-databind-2.8.0.jar:2.8.0] at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:148) ~[jackson-databind-2.8.0.jar:2.8.0] at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3789) ~[jackson-databind-2.8.0.jar:2.8.0] at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2913) ~[jackson-databind-2.8.0.jar:2.8.0] at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:226) ~[spring-web-4.2.6.RELEASE.jar:4.2.6.RELEASE] ... 66 common frames omitted
Sin embargo, la serialization en la statement de devolución funciona bien para serializar a un object JSON y envía la respuesta. Es solo la deserialization que no está funcionando.
Si cambio la variable del cuerpo a una Cadena y creo mapeador manualmente, también funciona bien. Me gusta esto:
@RequestMapping("cloudservice/login/{uuid}", method = arrayOf(RequestMethod.POST)) fun login(@PathVariable(value="uuid")uuid: String, @RequestBody user: String ) : ResponseEntity<CloudServiceUser> { val mapper = ObjectMapper().registerModule(KotlinModule()) val mapperData: CloudServiceUser = mapper.readValue(user) val cloudServiceFactory : Class<CloudServiceFactory> = cloudServiceRepository.cloudServiceExtensions[UUID.fromString(uuid)] ?: throw InvalidPathVariableException("Invalid UUID.") var token : String try { token = cloudServiceFactory.newInstance().authenticationService.login(mapperData.userId, mapperData.password) } catch (e:Exception ){ throw CloudServiceException(e.message) } return ResponseEntity(CloudServiceUser(userId=mapperData.userId, password = "", token = token),HttpStatus.OK) }
¿Algunas ideas?
Es un proyecto de código abierto, así que siéntase libre de navegarlo si necesita más información: https://github.com/irotsoma/cloudbackenc . Tenga en count que está en un estado muy temprano en este momento.
EDITAR: Solo quería agregar una nota sobre mis problemas con las testings de integración como se indica en los comentarios sobre la respuesta aceptada. Terminé nunca obteniendo la testing de integración para poder deserializar la respuesta (aunque el lado del controller REST funcionó bien al igual que en la producción). Así que encontré una solución usando un object Map, que por alguna razón fue capaz de deserializar, y luego procesarlo manualmente en lugar de usar el object de class. Ya que es solo un problema con la testing y no el código que se testing, esto estuvo bien para mí.
val returnValue = template.postForEntity("REQUEST URL", httpEntity, Map::class.java)
- Clase de datos de SpringBoot + Jackson + Kotlin: annotations de campo ignoradas
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- Referencia no resuelta: SpringExtension utilizando @ExtendWith anotación
- Usando una constante de Java en un parámetro de anotación de Kotlin
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- BadCnetworkingentialsException: no se pudo get el token de acceso con la security de arranque de resorte Oauth2 en GAE
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- Kotlin + SpringBoot 2.0.0-M4 falló en el context de la aplicación de carga (BeanCreationException)
Debes ayudar a Jackson a deserializar las classs de datos como se indica en el post de error. Puede hacerlo registrando jackson-module-kotlin en ObjectMapper
como sigue :
val mapper = ObjectMapper().registerModule(KotlinModule())
Para decirle a la spring sobre su propio ObjectMapper
personalizado, defina un @Bean
y @Primary
como @Primary
:
@Configuration open class ObjectMapperConfiguration { @Bean @Primary open fun objectMapper() = ObjectMapper().apply { registerModule(KotlinModule()) } }
Otras lecturas:
- Cómo usar jackson para deserializar las collections de Kotlin
- ¿Cómo deserializo JSON en una list <SomeType> con Kotlin + Jackson?
- ¿Cómo compartir la configuration repetitiva de Kotlin en múltiples proyectos de Gradle?
- Beneficios de LINQ sobre el método funcional chaines