ResultBolt.java

/*
 * #!
 * %
 * Copyright (C) 2014 - 2016 Humboldt-Universität zu Berlin
 * %
 * Licensed 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 de.hub.cs.dbis.aeolus.testUtils;

import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import backtype.storm.task.OutputCollector;
import backtype.storm.task.TopologyContext;
import backtype.storm.topology.IRichBolt;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.tuple.Tuple;





/**
 * {@link ResultBolt} accumulates all received tuples and emits no tuples. {@link ResultBolt} acknowledges all received
 * tuples.
 * 
 * @author mjsax
 */
public class ResultBolt implements IRichBolt {
	private final static long serialVersionUID = 7985730498618052164L;
	
	private final static Logger logger = LoggerFactory.getLogger(ResultBolt.class);
	
	
	
	private OutputCollector collector;
	public LinkedList<List<Object>> receivedTuples = new LinkedList<List<Object>>();
	
	
	
	@Override
	public void prepare(@SuppressWarnings("rawtypes") Map stormConf, TopologyContext context, OutputCollector collector) {
		this.collector = collector;
	}
	
	@Override
	public void execute(Tuple input) {
		logger.trace("Buffering result tuple: {}", input);
		this.receivedTuples.add(input.getValues());
		this.collector.ack(input);
	}
	
	@Override
	public void cleanup() {
		// nothing to do
	}
	
	@Override
	public void declareOutputFields(OutputFieldsDeclarer declarer) {
		// nothing to do
	}
	
	@Override
	public Map<String, Object> getComponentConfiguration() {
		return null;
	}
	
}