| package backtype.storm.testing; |
| |
| import backtype.storm.task.OutputCollector; |
| import backtype.storm.topology.OutputFieldsDeclarer; |
| import backtype.storm.tuple.Tuple; |
| import backtype.storm.tuple.Fields; |
| import java.util.Map; |
| import backtype.storm.task.TopologyContext; |
| import backtype.storm.topology.IRichBolt; |
| import java.util.HashMap; |
| import org.apache.log4j.Logger; |
| import static backtype.storm.utils.Utils.tuple; |
| |
| |
| public class TestAggregatesCounter implements IRichBolt { |
| public static Logger LOG = Logger.getLogger(TestWordCounter.class); |
| |
| Map<String, Integer> _counts; |
| OutputCollector _collector; |
| |
| public void prepare(Map stormConf, TopologyContext context, OutputCollector collector) { |
| _collector = collector; |
| _counts = new HashMap<String, Integer>(); |
| } |
| |
| public void execute(Tuple input) { |
| String word = (String) input.getValues().get(0); |
| int count = (Integer) input.getValues().get(1); |
| _counts.put(word, count); |
| int globalCount = 0; |
| for(String w: _counts.keySet()) { |
| globalCount+=_counts.get(w); |
| } |
| _collector.emit(tuple(globalCount)); |
| _collector.ack(input); |
| } |
| |
| public void cleanup() { |
| |
| } |
| |
| public void declareOutputFields(OutputFieldsDeclarer declarer) { |
| declarer.declare(new Fields("agg-global")); |
| } |
| } |