001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.apache.hadoop.lib.wsrs;
020
021import org.apache.hadoop.classification.InterfaceAudience;
022import org.apache.hadoop.util.HttpExceptionUtils;
023import org.slf4j.Logger;
024import org.slf4j.LoggerFactory;
025
026import javax.ws.rs.core.Response;
027import javax.ws.rs.ext.ExceptionMapper;
028
029@InterfaceAudience.Private
030public class ExceptionProvider implements ExceptionMapper<Throwable> {
031  private static Logger LOG = LoggerFactory.getLogger(ExceptionProvider.class);
032
033  private static final String ENTER = System.getProperty("line.separator");
034
035  protected Response createResponse(Response.Status status, Throwable throwable) {
036    return HttpExceptionUtils.createJerseyExceptionResponse(status, throwable);
037  }
038
039  protected String getOneLineMessage(Throwable throwable) {
040    String message = throwable.getMessage();
041    if (message != null) {
042      int i = message.indexOf(ENTER);
043      if (i > -1) {
044        message = message.substring(0, i);
045      }
046    }
047    return message;
048  }
049
050  protected void log(Response.Status status, Throwable throwable) {
051    LOG.debug("{}", throwable.getMessage(), throwable);
052  }
053
054  @Override
055  public Response toResponse(Throwable throwable) {
056    return createResponse(Response.Status.BAD_REQUEST, throwable);
057  }
058
059}