/**
* Copyright (c) 2009 - 2012 Red Hat, Inc.
*
* This software is licensed to you under the GNU General Public License,
* version 2 (GPLv2). There is NO WARRANTY for this software, express or
* implied, including the implied warranties of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. You should have received a copy of GPLv2
* along with this software; if not, see
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
*
* Red Hat trademarks are not licensed under GPLv2. No permission is
* granted to use or replicate Red Hat trademarks that are incorporated
* in this software or its documentation.
*/
package org.candlepin.common.exceptions.mappers;
import static org.jboss.resteasy.util.MediaTypeHelper.*;
import org.candlepin.common.exceptions.CandlepinException;
import org.candlepin.common.exceptions.ExceptionMessage;
import org.candlepin.common.util.VersionUtil;
import com.google.inject.Inject;
import org.jboss.resteasy.util.HttpHeaderNames;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xnap.commons.i18n.I18n;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import javax.inject.Provider;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.ResponseBuilder;
import javax.ws.rs.core.Response.Status;
/**
* CandlepinExceptionMapper
*/
public class CandlepinExceptionMapper {
private static final List<MediaType> DESIRED_RESPONSE_TYPES =
new LinkedList<MediaType>() {
{
add(MediaType.APPLICATION_JSON_TYPE);
add(MediaType.TEXT_PLAIN_TYPE);
add(MediaType.APPLICATION_ATOM_XML_TYPE);
}
};
// Use a provider so we get a scoped HttpServletRequest
@Inject
private javax.inject.Provider<HttpServletRequest> requestProvider;
@Inject
protected Provider<I18n> i18n;
private static Logger log = LoggerFactory.getLogger(CandlepinExceptionMapper.class);
public MediaType determineBestMediaType() {
HttpServletRequest request = requestProvider.get();
String header = request.getHeader(HttpHeaderNames.ACCEPT);
MediaType mediaType = null;
if (header != null) {
List<MediaType> headerMediaTypes = parseHeader(header);
mediaType = headerMediaTypes.size() == 0 ? MediaType.TEXT_PLAIN_TYPE :
getBestMatch(DESIRED_RESPONSE_TYPES, headerMediaTypes);
}
if (mediaType == null || (mediaType.getType().equals("*") &&
mediaType.getSubtype().equals("*"))) {
mediaType = MediaType.APPLICATION_JSON_TYPE;
}
return mediaType;
}
protected ResponseBuilder getDefaultBuilder(Throwable exception,
Status status, MediaType responseMediaType) {
Throwable cause = exception;
while (cause.getCause() != null) {
cause = cause.getCause();
}
String message = "";
StackTraceElement[] stes = cause.getStackTrace();
// 1051215: the exception may not have a stacktrace, rare but could
// happen which breaks things.
if (stes != null && stes.length > 0) {
StackTraceElement ele = stes[0];
int line = ele.getLineNumber();
String method = ele.getMethodName();
String clazz = ele.getClassName();
message = i18n.get().tr("Runtime Error {0} at {1}.{2}:{3}",
exception.getMessage(), clazz, method, line);
}
else {
// just use the exception message
message = i18n.get().tr("Runtime Error {0}", exception.getMessage());
}
if (!(exception instanceof CandlepinException) || ((CandlepinException) exception).isLogException()) {
log.error(message, exception);
}
if (status == null) {
status = Status.INTERNAL_SERVER_ERROR;
}
Map<String, String> map = VersionUtil.getVersionMap();
return Response.status(status)
.entity(new ExceptionMessage(message))
.type(responseMediaType)
.header(VersionUtil.VERSION_HEADER,
map.get("version") + "-" + map.get("release"));
}
}