| /* |
| * 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; |
| |
| import org.apache.storm.generated.StormTopology; |
| import org.apache.storm.task.OutputCollector; |
| import org.apache.storm.task.TopologyContext; |
| import org.apache.storm.testing.TestWordSpout; |
| import org.apache.storm.topology.OutputFieldsDeclarer; |
| import org.apache.storm.topology.TopologyBuilder; |
| import org.apache.storm.topology.base.BaseRichBolt; |
| import org.apache.storm.tuple.Fields; |
| import org.apache.storm.tuple.Tuple; |
| import org.apache.storm.tuple.Values; |
| import org.apache.storm.utils.Utils; |
| |
| import java.util.Map; |
| |
| /** |
| * This is a basic example of a Storm topology. |
| */ |
| public class ExclamationTopology { |
| |
| public static final String WORD = "word"; |
| public static final String EXCLAIM_1 = "exclaim1"; |
| public static final String EXCLAIM_2 = "exclaim2"; |
| |
| public static class ExclamationBolt extends BaseRichBolt { |
| OutputCollector _collector; |
| |
| @Override |
| public void prepare(Map conf, TopologyContext context, OutputCollector collector) { |
| _collector = collector; |
| } |
| |
| @Override |
| public void execute(Tuple tuple) { |
| _collector.emit(tuple, new Values(tuple.getString(0) + "!!!")); |
| _collector.ack(tuple); |
| } |
| |
| @Override |
| public void declareOutputFields(OutputFieldsDeclarer declarer) { |
| declarer.declare(new Fields("word")); |
| } |
| |
| |
| } |
| |
| public static void main(String[] args) throws Exception { |
| StormTopology topology = getStormTopology(); |
| |
| Config conf = new Config(); |
| conf.setDebug(true); |
| |
| if (args != null && args.length > 0) { |
| conf.setNumWorkers(3); |
| |
| StormSubmitter.submitTopologyWithProgressBar(args[0], conf, topology); |
| } |
| else { |
| |
| LocalCluster cluster = new LocalCluster(); |
| cluster.submitTopology("test", conf, topology); |
| Utils.sleep(10000); |
| cluster.killTopology("test"); |
| cluster.shutdown(); |
| } |
| } |
| |
| public static StormTopology getStormTopology() { |
| TopologyBuilder builder = new TopologyBuilder(); |
| builder.setSpout(WORD, new TestWordSpout(), 10); |
| builder.setBolt(EXCLAIM_1, new ExclamationTopology.ExclamationBolt(), 3).shuffleGrouping(WORD); |
| builder.setBolt(EXCLAIM_2, new ExclamationTopology.ExclamationBolt(), 2).shuffleGrouping(EXCLAIM_1); |
| return builder.createTopology(); |
| } |
| } |