/** * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The ASF licenses this file to you 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 org.apache.storm.starter; import java.util.HashMap; import java.util.Map; import org.apache.storm.Config; import org.apache.storm.StormSubmitter; import org.apache.storm.spout.ShellSpout; import org.apache.storm.task.ShellBolt; import org.apache.storm.topology.BasicOutputCollector; import org.apache.storm.topology.IRichBolt; import org.apache.storm.topology.IRichSpout; import org.apache.storm.topology.OutputFieldsDeclarer; import org.apache.storm.topology.TopologyBuilder; import org.apache.storm.topology.base.BaseBasicBolt; import org.apache.storm.tuple.Fields; import org.apache.storm.tuple.Tuple; import org.apache.storm.tuple.Values; /** * This topology demonstrates Storm's stream groupings and multilang capabilities. */ public class WordCountTopologyNode { public static void main(String[] args) throws Exception { TopologyBuilder builder = new TopologyBuilder(); builder.setSpout("spout", new RandomSentence(), 5); builder.setBolt("split", new SplitSentence(), 8).shuffleGrouping("spout"); builder.setBolt("count", new WordCount(), 12).fieldsGrouping("split", new Fields("word")); Config conf = new Config(); conf.setDebug(true); String topoName = "word-count"; if (args != null && args.length > 0) { topoName = args[0]; } conf.setNumWorkers(3); StormSubmitter.submitTopologyWithProgressBar(topoName, conf, builder.createTopology()); } public static class SplitSentence extends ShellBolt implements IRichBolt { public SplitSentence() { super("node", "splitsentence.js"); } @Override public void declareOutputFields(OutputFieldsDeclarer declarer) { declarer.declare(new Fields("word")); } @Override public Map<String, Object> getComponentConfiguration() { return null; } } public static class RandomSentence extends ShellSpout implements IRichSpout { public RandomSentence() { super("node", "randomsentence.js"); } @Override public void declareOutputFields(OutputFieldsDeclarer declarer) { declarer.declare(new Fields("word")); } @Override public Map<String, Object> getComponentConfiguration() { return null; } } public static class WordCount extends BaseBasicBolt { Map<String, Integer> counts = new HashMap<String, Integer>(); @Override public void execute(Tuple tuple, BasicOutputCollector collector) { String word = tuple.getString(0); Integer count = counts.get(word); if (count == null) { count = 0; } count++; counts.put(word, count); collector.emit(new Values(word, count)); } @Override public void declareOutputFields(OutputFieldsDeclarer declarer) { declarer.declare(new Fields("word", "count")); } } }