1.建立Java工程
使用idea,添加lib库,拷贝storm中lib到工程中
2.拷贝wordcount代码
下载src包,解压找到
apache-storm-0.9.4-src\apache-storm-0.9.4\examples\storm-starter\src\jvm\storm\starter目录下
拷贝WordCountTopology.java内容;
修改python处理方式;
1 import backtype.storm.Config; 2 import backtype.storm.LocalCluster; 3 import backtype.storm.StormSubmitter; 4 import backtype.storm.task.ShellBolt; 5 import backtype.storm.topology.BasicOutputCollector; 6 import backtype.storm.topology.IRichBolt; 7 import backtype.storm.topology.OutputFieldsDeclarer; 8 import backtype.storm.topology.TopologyBuilder; 9 import backtype.storm.topology.base.BaseBasicBolt;10 import backtype.storm.tuple.Fields;11 import backtype.storm.tuple.Tuple;12 import backtype.storm.tuple.Values;13 import com.bigdata.storm.spout.*;14 15 import java.util.HashMap;16 import java.util.Map;17 /**18 * Created by Edward on 2016/8/17.19 */20 public class MyTest {21 22 public static class SplitSentence extends BaseBasicBolt{23 24 @Override25 public void execute(Tuple tuple, BasicOutputCollector basicOutputCollector) {26 String word = tuple.getString(0);27 String str[] = word.split(" ");28 29 System.out.println("Split Sentence:" + tuple.getSourceStreamId());30 for(int i=0; i<str.length; i++)31 {32 basicOutputCollector.emit(new Values(str[i]));33 }34 }35 36 @Override37 public void declareOutputFields(OutputFieldsDeclarer outputFieldsDeclarer) {38 outputFieldsDeclarer.declare(new Fields("word"));39 }40 }41 42 public static class WordCount extends BaseBasicBolt {43 Map<String, Integer> counts = new HashMap<String, Integer>();44 45 @Override46 public void execute(Tuple tuple, BasicOutputCollector collector) {47 String word = tuple.getString(0);48 Integer count = counts.get(word);49 if (count == null)50 count = 0;51 count++;52 counts.put(word, count);53 System.out.println("Word Count:" + tuple.getSourceStreamId());54 collector.emit(new Values(word, count));55 56 }57 58 @Override59 public void declareOutputFields(OutputFieldsDeclarer declarer) {60 declarer.declare(new Fields("word", "count"));61 }62 }63 64 public static void main(String[] args) throws Exception {65 66 TopologyBuilder builder = new TopologyBuilder();67 68 builder.setSpout("spout", new RandomSentenceSpout(), 5);69 70 builder.setBolt("split", new SplitSentence(), 8).shuffleGrouping("spout");71 builder.setBolt("count", new WordCount(), 12).fieldsGrouping("split", new Fields("word"));72 73 Config conf = new Config();74 conf.setDebug(true);75 76 77 if (args != null && args.length > 0) {78 conf.setNumWorkers(3);79 80 StormSubmitter.submitTopologyWithProgressBar(args[0], conf, builder.createTopology());81 }82 else {83 conf.setMaxTaskParallelism(3);84 85 LocalCluster cluster = new LocalCluster();86 cluster.submitTopology("word-count", conf, builder.createTopology());87 88 Thread.sleep(50000);89 90 cluster.shutdown();91 }92 }93 }
3.拷贝随机生成spout代码
找到 apache-storm-0.9.4-src\apache-storm-0.9.4\examples\storm-starter\src\jvm\storm\starter\spout
拷贝RandomSentenceSpout.java到工程中
1 import backtype.storm.spout.SpoutOutputCollector; 2 import backtype.storm.task.TopologyContext; 3 import backtype.storm.topology.OutputFieldsDeclarer; 4 import backtype.storm.topology.base.BaseRichSpout; 5 import backtype.storm.tuple.Fields; 6 import backtype.storm.tuple.Values; 7 import backtype.storm.utils.Utils; 8 9 import java.util.Map;10 import java.util.Random;11 12 public class RandomSentenceSpout extends BaseRichSpout {13 SpoutOutputCollector _collector;14 Random _rand;15 16 @Override17 public void open(Map conf, TopologyContext context, SpoutOutputCollector collector) {18 _collector = collector;19 _rand = new Random();20 }21 22 @Override23 public void nextTuple() {24 Utils.sleep(10000);25 String[] sentences = new String[]{ "the cow jumped over the moon", "an apple a day keeps the doctor away",26 "four score and seven years ago", "snow white and the seven dwarfs", "i am at two with nature" };27 String sentence = sentences[_rand.nextInt(sentences.length)];28 Object id = new Object();29 System.out.println(id);30 //id message ID 用来保证可靠性的,如果失败fail 会返回 message id 信息31 _collector.emit(new Values(sentence), id);32 }33 34 @Override35 public void ack(Object id) {36 System.out.println("storm spout ack id = "+id);37 }38 39 @Override40 public void fail(Object id) {41 }42 43 @Override44 public void declareOutputFields(OutputFieldsDeclarer declarer) {45 declarer.declare(new Fields("word"));46 }47 48 }
4.本地运行
在idea中直接点击运行,观察运行过程
5.集群运行
将程序打包成jar,然后放到集群中运行。
原标题:Storm 运行例子
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