STORM入门之（Topology简易Demo）

集群模式与本地模式是根据main函数入参决定，可以根据入参调节 worker executor task

maven配置

<dependency>    <groupId>org.apache.storm</groupId>    <artifactId>storm-core</artifactId>     <version>1.0.0</version></dependency>

Topology

package com.storm.topology;import com.storm.bolt.BoltA;import com.storm.spout.SpoutA;import org.apache.storm.Config;import org.apache.storm.LocalCluster;import org.apache.storm.StormSubmitter;import org.apache.storm.generated.AlreadyAliveException;import org.apache.storm.generated.AuthorizationException;import org.apache.storm.generated.InvalidTopologyException;import org.apache.storm.topology.TopologyBuilder;import org.apache.storm.utils.Utils;/** * Created with IntelliJ IDEA. * User: Administrator * Date: 17-8-21 * Time: 上午10:54 * To change this template use File | Settings | File Templates. */public class Topology {    public static void main(String args[]) throws AuthorizationException, AlreadyAliveException, InvalidTopologyException {        TopologyBuilder builder = new TopologyBuilder();        builder.setSpout("SpoutA",new SpoutA(),1);        builder.setBolt("BoltA",new BoltA(),1).shuffleGrouping("SpoutA");        Config conf = new Config();        conf.setDebug(true);        if (args != null && args.length > 0) {            conf.setNumWorkers(3);            StormSubmitter.submitTopologyWithProgressBar(args[0], conf, builder.createTopology());        }        else {            LocalCluster cluster = new LocalCluster();            cluster.submitTopology("soc", conf, builder.createTopology());            Utils.sleep(20000);            cluster.killTopology("soc");            cluster.shutdown();        }    }}

Spout

package com.storm.spout;import org.apache.storm.spout.SpoutOutputCollector;import org.apache.storm.task.TopologyContext;import org.apache.storm.topology.OutputFieldsDeclarer;import org.apache.storm.topology.base.BaseRichSpout;import org.apache.storm.tuple.Fields;import org.apache.storm.tuple.Values;import java.util.Map;/** * Created with IntelliJ IDEA. * User: Administrator * Date: 17-8-21 * Time: 下午1:15 * To change this template use File | Settings | File Templates. */public class SpoutA extends BaseRichSpout {        private SpoutOutputCollector collector;        public void nextTuple() {            String b = "{what the fuck}";            try {                Thread.sleep(2000);            } catch (InterruptedException e) {                e.printStackTrace();            }            collector.emit(new Values("yjd",b));        }        public void open(Map arg0, TopologyContext arg1, SpoutOutputCollector collector) {            this.collector = collector;        }        @Override        public void declareOutputFields(OutputFieldsDeclarer declarer) {            declarer.declare(new Fields("key","message"));        }}

Bolt

package com.storm.bolt;import org.apache.storm.task.OutputCollector;import org.apache.storm.task.TopologyContext;import org.apache.storm.topology.OutputFieldsDeclarer;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 java.util.Map;/** * Created with IntelliJ IDEA. * User: Administrator * Date: 17-8-21 * Time: 下午1:16 * To change this template use File | Settings | File Templates. */public class BoltA extends BaseRichBolt {    private OutputCollector collector;    @Override    public void execute(Tuple arg0) {        String word = (String) arg0.getValue(1);        String out = System.currentTimeMillis()+"MessageB got is '" + word + "'!";        collector.emit(new Values("yjd",out));    }    @Override    public void prepare(Map arg0, TopologyContext arg1, OutputCollector arg2) {        collector = arg2;    }    @Override    public void declareOutputFields(OutputFieldsDeclarer arg0) {        arg0.declare(new Fields("a", "b"));    }}

结果