package storm.blueprints.chapter1.v4;
import storm.blueprints.chapter1.v1.*;
import backtype.storm.task.OutputCollector;
import backtype.storm.task.TopologyContext;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.topology.base.BaseRichBolt;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Tuple;
import backtype.storm.tuple.Values;
import java.util.Map;
public class SplitSentenceBolt extends BaseRichBolt{
private OutputCollector collector;
public void prepare(Map config, TopologyContext context, OutputCollector collector) {
this.collector = collector;
}
public void execute(Tuple tuple) {
String sentence = tuple.getStringByField("sentence");
String[] words = sentence.split(" ");
for(String word : words){
this.collector.emit(tuple, new Values(word));
}
this.collector.ack(tuple);
}
public void declareOutputFields(OutputFieldsDeclarer declarer) {
declarer.declare(new Fields("word"));
}
}