content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.jstorm.elasticsearch.bolt;
  
  import org.elasticsearch.action.get.GetResponse;
  
  import backtype.storm.topology.OutputFieldsDeclarer;
  import backtype.storm.tuple.Fields;
  import backtype.storm.tuple.Tuple;
  
  import com.alibaba.jstorm.elasticsearch.common.EsConfig;
  import com.alibaba.jstorm.elasticsearch.common.EsOutputDeclarer;
  import com.alibaba.jstorm.elasticsearch.mapper.EsQueryMapper;
  import com.google.common.base.Preconditions;
  
  public class EsQueryBolt extends EsAbstractBolt {
  
    private static final long serialVersionUID = -6500107598987890882L;
    
    private EsOutputDeclarer esOutputDeclarer;
    private EsQueryMapper mapper;
  
    public EsQueryBolt(EsConfig esConfig, EsQueryMapper mapper,
        EsOutputDeclarer esOutputDeclarer) {
      super(esConfig);
      this.esOutputDeclarer = esOutputDeclarer;
      this.mapper = mapper;
      Preconditions.checkArgument(esOutputDeclarer.getFields().length != 0,
          "EsOutputDeclarer should contain fields");
    }
  
    @Override
    public void execute(Tuple tuple) {
      try {
        String index = mapper.getIndex(tuple);
        String type = mapper.getType(tuple);
        String id = mapper.getId(tuple);
        GetResponse response = client.prepareGet(index, type, id).execute()
            .actionGet();
        collector.emit(esOutputDeclarer.getValues(response.getSource()));
        collector.ack(tuple);
      } catch (Exception e) {
        collector.fail(tuple);
      }
    }
  
    @Override
    public void declareOutputFields(OutputFieldsDeclarer declarer) {
      declarer.declare(new Fields(esOutputDeclarer.getFields()));
    }
  
  }
  