it.jugpadova.util.JUGEventsExceptionResolver.java Source code

Introduction

Here is the source code for it.jugpadova.util.JUGEventsExceptionResolver.java

Source

/*
 *  Copyright 2008 JUG Events Team.
 * 
 *  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.
 *  under the License.
 */
package it.jugpadova.util;

import it.jugpadova.exception.ConversationException;
import it.jugpadova.exception.ParancoeAccessDeniedException;

import it.jugpadova.exception.RegistrationNotOpenException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.parancoe.web.ExceptionResolver;
import org.parancoe.web.util.FlashHelper;
import org.springframework.web.HttpSessionRequiredException;
import org.springframework.web.multipart.MaxUploadSizeExceededException;
import org.springframework.web.multipart.MultipartException;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.servlet.ModelAndView;

/**
 * Ovverride ExceptionResolver to define custom web application Exception.
 * Should be mapped in parancoe-servlet.xml
 * @author Enrico Giurin
 *
 */
public class JUGEventsExceptionResolver extends ExceptionResolver {

    private static final Logger logger = Logger.getLogger(JUGEventsExceptionResolver.class);
    private CommonsMultipartResolver multipartResolver;

    public CommonsMultipartResolver getMultipartResolver() {
        return multipartResolver;
    }

    public void setMultipartResolver(CommonsMultipartResolver multipartResolver) {
        this.multipartResolver = multipartResolver;
    }

    @Override
    public ModelAndView resolveException(HttpServletRequest req, HttpServletResponse res, Object object,
            Exception e) {
        try {
            if (e instanceof ParancoeAccessDeniedException) {
                return new ModelAndView("accessDenied", null);
            }
            if (e instanceof MaxUploadSizeExceededException) {
                return Utilities.getMessageView("upload.maximumSizeExceeded",
                        Long.toString(multipartResolver.getFileUpload().getSizeMax()));
            }
            if (e instanceof RegistrationNotOpenException) {
                return Utilities.getMessageView("participant.registration.notOpen",
                        ((RegistrationNotOpenException) e).getEvent().getTitle());
            }
            if (e instanceof ConversationException) {
                return new ModelAndView("conversationException", null);
            }
            if (e instanceof HttpSessionRequiredException) {
                FlashHelper.setRedirectError(req, "objectNotFoundInSession");
                return new ModelAndView("event/list", null);
            }

            if (!interceptedWithMinimalLogging(e)) {
                logger.error("Unexpected exception", e);
            }
            logger.info("Exception requesting URL: " + req.getRequestURL().toString());
            logger.info("  request from " + req.getRemoteHost() + "(" + req.getRemoteAddr() + ")");
            return super.resolveException(req, res, object, e);
        } catch (Exception ex) {
            logger.error("Error resolving exception", ex);
        }
        return new ModelAndView("redirect:/home/500page.html");
    }

    private boolean interceptedWithMinimalLogging(Exception e) {
        boolean intercepted = false;
        // Discarding too generic exception, with unuseful stacktrace...so minimal log output.
        // Maybe some could be moved to the base class.
        if ((e instanceof HttpSessionRequiredException) || (e instanceof MultipartException)) {
            if (logger.isDebugEnabled()) {
                logger.debug(e.getLocalizedMessage(), e);
            } else {
                logger.error("[" + e.getClass().getName() + "] " + e.getLocalizedMessage());
            }
            intercepted = true;
        }
        return intercepted;
    }
}