사용자 지정 ErrorWebExceptionHandler 생성 실패

사용자 지정 ErrorWebExceptionHandler 생성 실패

나는 나만의 것을 만들려고 노력하고 있습니다.ErrorWebExceptionHandlerSpring Boot 2(Spring Boot 2)에서 기본 프로그램을 확장했지만 응용 프로그램이 시작되지 않고 다음 메시지가 표시됩니다.

Caused by: java.lang.IllegalArgumentException: Property 'messageWriters' is required
at org.springframework.boot.autoconfigure.web.reactive.error.AbstractErrorWebExceptionHandler.afterPropertiesSet(AbstractErrorWebExceptionHandler.java:214) ~[spring-boot-autoconfigure-2.0.4.RELEASE.jar:2.0.4.RELEASE]

내 처리기(Kotlin 코드):

@Component
@Order(-2)
class SampleErrorWebExceptionHandler(
    errorAttributes: ErrorAttributes?,
    resourceProperties: ResourceProperties?,
    errorProperties: ErrorProperties?,
    applicationContext: ApplicationContext?
) : DefaultErrorWebExceptionHandler(errorAttributes, resourceProperties, errorProperties, applicationContext) {

    override fun logError(request: ServerRequest, errorStatus: HttpStatus) {
        // do something
    }
}

무엇이 원인이 될 수 있습니까?

생성자에 ServerCodecConfigurer의 종속성을 추가해 보십시오.

GlobalErrorWebExceptionHandler(
  ErrorAttributes errorAttributes,
  ResourceProperties resourceProperties,
  ApplicationContext applicationContext,
  ServerCodecConfigurer configurer
) {
    super(errorAttributes, resourceProperties, applicationContext);
    this.setMessageWriters(configurer.getWriters());
}

설정해야 합니다.messageWriters여기에 필요하기 때문에 그 예를 들어.당신은 아마 그것을 다음과 같이 만들어야 할 것입니다.@BeanSpring Boot이 전용 자동 구성에서 수행하는 것과 같습니다.

저는 이것도 그냥 했고, 스프링 구현을 보고 나서 시공자에 구성 요소를 추가했습니다.

@Component
@Order(-2)
class GlobalErrorWebExceptionHandler(
        errorAttributes: ErrorAttributes,
        resourceProperties: ResourceProperties,
        applicationContext: ApplicationContext,
        viewResolvers: ObjectProvider<ViewResolver>,
        serverCodecConfigurer: ServerCodecConfigurer
) : AbstractErrorWebExceptionHandler(
        errorAttributes,
        resourceProperties,
        applicationContext
) {
    private val logger = LogFactory.getLog(GlobalErrorWebExceptionHandler::class.java)!!

    init {
        setViewResolvers(viewResolvers.orderedStream().collect(Collectors.toList()))
        setMessageWriters(serverCodecConfigurer.writers)
        setMessageReaders(serverCodecConfigurer.readers)
    }

    override fun getRoutingFunction(errorAttributes: ErrorAttributes) = RouterFunctions.route(RequestPredicates.all(), HandlerFunction { request ->
        val ex = getError(request)
        logger.error(ex.message)

        ServerResponse.ok().build()
    })
}

위 솔루션이 명확하지 않은 경우 아래를 참조하십시오.

@Component
@Order(-2)
public class GlobalErrorWebExceptionHandler extends AbstractErrorWebExceptionHandler {

    private final ObjectProvider<ViewResolver> viewResolvers;
    private final ServerCodecConfigurer serverCodecConfigurer;


    public GlobalErrorWebExceptionHandler(ObjectProvider<ViewResolver> viewResolvers, ServerCodecConfigurer serverCodecConfigurer,
                                          ErrorAttributes errorAttributes, WebProperties.Resources resources, ApplicationContext applicationContext) {
        super(errorAttributes, resources, applicationContext);
        this.viewResolvers = viewResolvers;
        this.serverCodecConfigurer = serverCodecConfigurer;
        super.setMessageWriters(serverCodecConfigurer.getWriters());
        super.setMessageReaders(serverCodecConfigurer.getReaders());
        super.setViewResolvers(viewResolvers.orderedStream().collect(Collectors.toList()));
    }

    @Override
    protected RouterFunction<ServerResponse> getRoutingFunction(ErrorAttributes errorAttributes) {
        return RouterFunctions.route(RequestPredicates.all(), this::renderErrorResponse);
    }

    private Mono<ServerResponse> renderErrorResponse(ServerRequest serverRequest) {
        Map<String, Object> errorPropertiesMap = getErrorAttributes(serverRequest,
                ErrorAttributeOptions.defaults());

        return ServerResponse.status(HttpStatus.BAD_REQUEST)
                .contentType(MediaType.APPLICATION_JSON)
                .body(BodyInserters.fromValue(errorPropertiesMap));
    }
}

언급URL : https://stackoverflow.com/questions/52497901/creating-custom-errorwebexceptionhandler-fails