ExceptionResolver.java

/*
 * Computoser is a music-composition algorithm and a website to present the results
 * Copyright (C) 2012-2014  Bozhidar Bozhanov
 *
 * Computoser is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * Computoser is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with Computoser.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.music.web.util;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;

@Component
public class ExceptionResolver implements HandlerExceptionResolver {

    private static final Logger logger = LoggerFactory.getLogger(ExceptionResolver.class);

    @Override
    public ModelAndView resolveException(HttpServletRequest request,
            HttpServletResponse response, Object handler, Exception ex) {

        // the stacktrace will be printed by spring's DispatcherServlet
        // we are only logging the request url and headeres here
        logger.warn("An exception occurred when invoking the following URL: "
                + request.getRequestURL() + " . Requester IP is "
                + request.getRemoteAddr() + ", User-Agent: "
                + request.getHeader("User-Agent") + "; Message=" + ex.getMessage() + ": " + ex.getStackTrace()[0].getMethodName());

        response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
        return null;
    }
}