Windows下基于eclipse的Storm应用开发与调试

原创文章，转载请注明： 转载自http://www.cnblogs.com/tovin/p/3971113.html

本文以一个简单的example来讲解如何开发storm应用程序

1、创建maven工程

　　在eclipse下创建maven工程，可以参照http://www.cnblogs.com/tovin/p/3822985.html

2、修改pom.xm添加依赖包

　　使用maven-assembly-plugin插件将工程依赖的jar都一起打包

　　storm的<scope>设置provided，主要是因为只要编译时需要storm包，当在storm集群运行时就不要将它一起打包了。

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.test</groupId>
  <artifactId>storm-example</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>storm-example</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
      <dependency>
           <groupId>org.apache.storm</groupId>
         <artifactId>storm-core</artifactId>
         <version>0.9.2-incubating</version>
         <scope>provided</scope>
       </dependency>
  </dependencies>

  <build>
    <plugins>
      <plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <version>2.4</version>
        <configuration>
          <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
        </configuration>
        <executions>
          <execution>
            <id>make-assembly</id>
            <phase>package</phase>
            <goals>
              <goal>single</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
</project>

3、编写Topology

　　(1) 编写Spout

import backtype.storm.spout.SpoutOutputCollector;
import backtype.storm.task.TopologyContext;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.topology.base.BaseRichSpout;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Values;

public class RandomSpout extends BaseRichSpout{
    private SpoutOutputCollector collector;
    private static String[] words = {"happy","excited","angry"};

    /* (non-Javadoc)
     * @see backtype.storm.spout.ISpout#open(java.util.Map, backtype.storm.task.TopologyContext, backtype.storm.spout.SpoutOutputCollector)
     */
    public void open(Map arg0, TopologyContext arg1, SpoutOutputCollector arg2) {
        // TODO Auto-generated method stub
        this.collector = arg2;
    }

    /* (non-Javadoc)
     * @see backtype.storm.spout.ISpout#nextTuple()
     */
    public void nextTuple() {
        // TODO Auto-generated method stub
        String word = words[new Random().nextInt(words.length)];
        collector.emit(new Values(word));
    }

    /* (non-Javadoc)
     * @see backtype.storm.topology.IComponent#declareOutputFields(backtype.storm.topology.OutputFieldsDeclarer)
     */
    public void declareOutputFields(OutputFieldsDeclarer arg0) {
        // TODO Auto-generated method stub
        arg0.declare(new Fields("randomstring"));
    }
}

　（2）编写bolt

import backtype.storm.topology.BasicOutputCollector;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.topology.base.BaseBasicBolt;
import backtype.storm.tuple.Tuple;

public class SenqueceBolt extends BaseBasicBolt{
    /* (non-Javadoc)
     * @see backtype.storm.topology.IBasicBolt#execute(backtype.storm.tuple.Tuple, backtype.storm.topology.BasicOutputCollector)
     */
    public void execute(Tuple input, BasicOutputCollector collector) {
        // TODO Auto-generated method stub
         String word = (String) input.getValue(0);
         String out = "I‘m " + word +  "!";
         System.out.println("out=" + out);
    }

    /* (non-Javadoc)
     * @see backtype.storm.topology.IComponent#declareOutputFields(backtype.storm.topology.OutputFieldsDeclarer)
     */
    public void declareOutputFields(OutputFieldsDeclarer declarer) {
        // TODO Auto-generated method stub
    }
}

　 （3）编写topo

　　　提供cluster和Local两种运行模式，这样我们就很方便的在本地运行FirstTopo来调试我们程序了。

import backtype.storm.Config;
import backtype.storm.LocalCluster;
import backtype.storm.StormSubmitter;
import backtype.storm.topology.TopologyBuilder;
import backtype.storm.utils.Utils;

public class FirstTopo {

    public static void main(String[] args) throws Exception {
        TopologyBuilder builder = new TopologyBuilder();
        builder.setSpout("spout", new RandomSpout());
        builder.setBolt("bolt", new SenqueceBolt()).shuffleGrouping("spout");
        Config conf = new Config();
        conf.setDebug(false);
        if (args != null && args.length > 0) {
            conf.setNumWorkers(3);
            StormSubmitter.submitTopology(args[0], conf, builder.createTopology());
        } else {  

            LocalCluster cluster = new LocalCluster();
            cluster.submitTopology("firstTopo", conf, builder.createTopology());
            Utils.sleep(100000);
            cluster.killTopology("firstTopo");
            cluster.shutdown();
        }
    }
}

　　（4）运行结果

　　　　本地运行时，在eclipse中的输出：

　　　在storm集群中运行时输出可以通过Storm UI进行查看

原创文章，转载请注明： 转载自http://www.cnblogs.com/tovin/p/3971113.html