package udacity.storm.spout;
import backtype.storm.spout.SpoutOutputCollector;
import backtype.storm.task.TopologyContext;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.topology.base.BaseRichSpout;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Values;
import backtype.storm.utils.Utils;
import java.util.Map;
import java.util.Random;
public class MyNamesSpout extends BaseRichSpout {
SpoutOutputCollector _collector;
Random _rand;
@Override
public void open(Map conf, TopologyContext context, SpoutOutputCollector collector) {
_collector = collector;
_rand = new Random();
}
@Override
public void nextTuple() {
Utils.sleep(100);
String[] names = new String[]{
"Taylor",
"Justine",
"Liz",
"Kim",
"Lewis"
};
String name = names[_rand.nextInt(names.length)];
_collector.emit(new Values(name));
}
@Override
public void declareOutputFields(OutputFieldsDeclarer declarer) {
declarer.declare(new Fields("name"));
}
}