PrepareBatchBolt.java

package backtype.storm.testing;

import backtype.storm.topology.BasicOutputCollector;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.topology.base.BaseBasicBolt;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Tuple;
import backtype.storm.utils.Utils;
import java.util.ArrayList;
import java.util.List;

public class PrepareBatchBolt extends BaseBasicBolt {
	Fields _outFields;

	public PrepareBatchBolt(Fields outFields) {
		_outFields = outFields;
	}

	@Override
	public void declareOutputFields(OutputFieldsDeclarer declarer) {
		declarer.declare(_outFields);
	}

	@Override
	public void execute(Tuple input, BasicOutputCollector collector) {
		long id = Utils.secureRandomLong();
		List<Object> toEmit = new ArrayList<Object>();
		toEmit.add(id);
		toEmit.addAll(input.getValues());
		collector.emit(toEmit);
	}

}