Java tutorial
/** * Copyright (c) 2015 Intel Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.trustedanalytics.servicecatalog.service; import static org.springframework.http.HttpStatus.BAD_REQUEST; import static org.springframework.http.HttpStatus.CONFLICT; import static org.springframework.http.HttpStatus.FORBIDDEN; import static org.springframework.http.HttpStatus.INTERNAL_SERVER_ERROR; import static org.springframework.http.HttpStatus.NOT_IMPLEMENTED; import org.springframework.beans.TypeMismatchException; import org.trustedanalytics.cloud.cc.api.CcOutputBadFormatted; import org.trustedanalytics.cloud.cc.api.customizations.CloudFoundryException; import org.trustedanalytics.cloud.cc.api.customizations.FeignResponseException; import org.trustedanalytics.servicecatalog.service.rest.NameAlreadyInUseException; import org.trustedanalytics.servicecatalog.service.rest.NoItemInCatalogException; import org.trustedanalytics.utils.errorhandling.ErrorLogger; import org.apache.commons.lang.StringUtils; import org.codehaus.jackson.map.ObjectMapper; import org.codehaus.jackson.type.TypeReference; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.http.HttpStatus; import org.springframework.http.converter.HttpMessageNotReadableException; import org.springframework.security.access.AccessDeniedException; import org.springframework.web.bind.annotation.ControllerAdvice; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.client.HttpStatusCodeException; import java.io.IOException; import java.util.HashMap; import java.util.Map; import javax.servlet.http.HttpServletResponse; @ControllerAdvice public class RestErrorHandler { private static final Logger LOGGER = LoggerFactory.getLogger(RestErrorHandler.class); @ExceptionHandler({ IllegalArgumentException.class, TypeMismatchException.class }) public void illegalArgument(Exception e, HttpServletResponse response) throws IOException { ErrorLogger.logAndSendErrorResponse(LOGGER, response, BAD_REQUEST, e); } @ExceptionHandler(UnsupportedOperationException.class) public void unsupportedOperation(Exception e, HttpServletResponse response) throws IOException { ErrorLogger.logAndSendErrorResponse(LOGGER, response, NOT_IMPLEMENTED, e); } @ExceptionHandler(CcOutputBadFormatted.class) public void ccOutputBadFormatted(Exception e, HttpServletResponse response) throws IOException { ErrorLogger.logAndSendErrorResponse(LOGGER, response, INTERNAL_SERVER_ERROR, e); } @ExceptionHandler(IllegalStateException.class) public void illegalState(Exception e, HttpServletResponse response) throws IOException { ErrorLogger.logAndSendErrorResponse(LOGGER, response, INTERNAL_SERVER_ERROR, e); } @ExceptionHandler(HttpMessageNotReadableException.class) public void badRequest(Exception e, HttpServletResponse response) throws IOException { ErrorLogger.logAndSendErrorResponse(LOGGER, response, BAD_REQUEST, e); } @ExceptionHandler(NameAlreadyInUseException.class) public void nameAlreadyInUse(Exception e, HttpServletResponse response) throws IOException { ErrorLogger.logAndSendErrorResponse(LOGGER, response, CONFLICT, e.getMessage(), e); } @ExceptionHandler(HttpStatusCodeException.class) public void handleHttpStatusCodeException(HttpStatusCodeException e, HttpServletResponse response) throws IOException { String message = extractErrorFromJSON(e.getResponseBodyAsString()); message = StringUtils.isNotBlank(message) ? message : e.getMessage(); ErrorLogger.logAndSendErrorResponse(LOGGER, response, e.getStatusCode(), message, e); } @ExceptionHandler(Exception.class) public void handleException(Exception e, HttpServletResponse response) throws Exception { org.trustedanalytics.utils.errorhandling.RestErrorHandler defaultErrorHandler = new org.trustedanalytics.utils.errorhandling.RestErrorHandler(); defaultErrorHandler.handleException(e, response); } @ExceptionHandler(AccessDeniedException.class) public void handleFeignException(AccessDeniedException e, HttpServletResponse response) throws IOException { ErrorLogger.logAndSendErrorResponse(LOGGER, response, FORBIDDEN, e.getMessage(), e); } @ExceptionHandler(FeignResponseException.class) public void handleFeignResponse(FeignResponseException e, HttpServletResponse response) throws IOException { ErrorLogger.logAndSendErrorResponse(LOGGER, response, e.getStatusCode(), e.getMessage(), e); } @ExceptionHandler(CloudFoundryException.class) public void handleCloudFoundryException(CloudFoundryException e, HttpServletResponse response) throws IOException { ErrorLogger.logAndSendErrorResponse(LOGGER, response, HttpStatus.valueOf(e.getHttpCode()), e.getMessage(), e); } @ExceptionHandler(NoItemInCatalogException.class) public void handleNoItemInCatalogException(NoItemInCatalogException e, HttpServletResponse response) throws IOException { ErrorLogger.logAndSendErrorResponse(LOGGER, response, BAD_REQUEST, e.getMessage(), e); } private static String extractErrorFromJSON(String json) { Map<String, String> map = new HashMap<>(); try { ObjectMapper mapper = new ObjectMapper(); map = mapper.readValue(json, new TypeReference<HashMap<String, String>>() { }); } catch (Exception e) { LOGGER.error("Error when extracting message from JSON. Continuing...", e); } return map.get("description"); } }