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 */
018package org.apache.hadoop.hbase.rest.provider.consumer;
019
020import java.io.IOException;
021import java.io.InputStream;
022import java.lang.annotation.Annotation;
023import java.lang.reflect.InvocationTargetException;
024import java.lang.reflect.Type;
025import org.apache.hadoop.hbase.rest.Constants;
026import org.apache.hadoop.hbase.rest.ProtobufMessageHandler;
027import org.apache.yetus.audience.InterfaceAudience;
028import org.slf4j.Logger;
029import org.slf4j.LoggerFactory;
030
031import org.apache.hbase.thirdparty.javax.ws.rs.Consumes;
032import org.apache.hbase.thirdparty.javax.ws.rs.WebApplicationException;
033import org.apache.hbase.thirdparty.javax.ws.rs.core.MediaType;
034import org.apache.hbase.thirdparty.javax.ws.rs.core.MultivaluedMap;
035import org.apache.hbase.thirdparty.javax.ws.rs.ext.MessageBodyReader;
036import org.apache.hbase.thirdparty.javax.ws.rs.ext.Provider;
037
038/**
039 * Adapter for hooking up Jersey content processing dispatch to ProtobufMessageHandler interface
040 * capable handlers for decoding protobuf input.
041 */
042@Provider
043@Consumes({ Constants.MIMETYPE_PROTOBUF, Constants.MIMETYPE_PROTOBUF_IETF })
044@InterfaceAudience.Private
045public class ProtobufMessageBodyConsumer implements MessageBodyReader<ProtobufMessageHandler> {
046  private static final Logger LOG = LoggerFactory.getLogger(ProtobufMessageBodyConsumer.class);
047
048  @Override
049  public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations,
050    MediaType mediaType) {
051    return ProtobufMessageHandler.class.isAssignableFrom(type);
052  }
053
054  @Override
055  public ProtobufMessageHandler readFrom(Class<ProtobufMessageHandler> type, Type genericType,
056    Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, String> httpHeaders,
057    InputStream inputStream) throws IOException, WebApplicationException {
058    ProtobufMessageHandler obj = null;
059    try {
060      obj = type.getDeclaredConstructor().newInstance();
061      return obj.getObjectFromMessage(inputStream);
062    } catch (InstantiationException | NoSuchMethodException | InvocationTargetException
063      | IllegalAccessException e) {
064      throw new WebApplicationException(e);
065    }
066  }
067}