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    
019    package org.apache.hadoop.lib.wsrs;
020    
021    import org.apache.hadoop.classification.InterfaceAudience;
022    import org.apache.hadoop.util.HttpExceptionUtils;
023    import org.slf4j.Logger;
024    import org.slf4j.LoggerFactory;
025    
026    import javax.ws.rs.core.Response;
027    import javax.ws.rs.ext.ExceptionMapper;
028    
029    @InterfaceAudience.Private
030    public 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    }