Java tutorial
/******************************************************************************* * Copyright 2015 Software Evolution and Architecture Lab, University of Zurich * * 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 eu.cloudwave.wp5.feedbackhandler.controller; import javax.servlet.http.HttpServletRequest; import org.apache.log4j.LogManager; import org.springframework.http.HttpStatus; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.bind.annotation.ResponseStatus; import org.springframework.web.servlet.ModelAndView; import eu.cloudwave.wp5.common.dto.RestRequestErrorDto; import eu.cloudwave.wp5.common.error.RequestException; public abstract class AbstractBaseUiController extends AbstractBaseController { private static final String ERROR = "Error"; private static final String MESSAGE = "message"; /** * Is called whenever an {@link RequestException} in a controller method is thrown. * * @param exception * the exception that arose * @param request * the request that caused the exception * @return an {@link RestRequestErrorDto} for the respective error */ @ExceptionHandler(RequestException.class) @ResponseStatus(HttpStatus.BAD_REQUEST) @ResponseBody public final ModelAndView handleRestRequestException(final RequestException exception, final HttpServletRequest request) { return htmlErrorPage(exception.getMessage()); } /** * Is called whenever an {@link Exception} in a controller method is thrown. * * @param exception * the exception that arose * @param request * the request that caused the exception * @return an error message */ @ExceptionHandler(Exception.class) @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR) @ResponseBody public final ModelAndView handleException(final Exception exception, final HttpServletRequest request) { LogManager.getLogger(getClass()).error(String.format(EXCEPTION_MESSAGE, request.getRequestURI()), exception); return htmlErrorPage(exception.getMessage()); } private final ModelAndView htmlErrorPage(final String message) { return new ModelAndView(ERROR, MESSAGE, message); } }