/**
* 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()));
}
}