Storm编程入门API系列之Storm的Topology默认Workers、默认executors和默认tasks数目

　　关于，storm的启动我这里不多说了。

　见博客

storm的3节点集群详细启动步骤（非HA和HA）（图文详解）

　　

　　建立stormDemo项目

Group Id ：  zhouls.bigdata

Artifact Id ： stormDemo

Package : stormDemo

<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.</modelVersion>

  <groupId>zhouls.bigdata</groupId>
  <artifactId>stormDemo</artifactId>
  <version>0.0.-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>stormDemo</name>
  <url>http://maven.apache.org</url>

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

  <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
    <dependency>
            <groupId>org.apache.storm</groupId>
            <artifactId>storm-core</artifactId>
            <version>1.0.</version>
    </dependency>
  </dependencies>
</project>

　　编写代码StormTopology.java

　以下是数字累加求和的例子

　　spout一直产生从1开始的递增数字

　　bolt进行汇总打印

package zhouls.bigdata.stormDemo;

import java.util.Map;

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.spout.SpoutOutputCollector;
import org.apache.storm.task.OutputCollector;
import org.apache.storm.task.TopologyContext;
import org.apache.storm.topology.OutputFieldsDeclarer;
import org.apache.storm.topology.TopologyBuilder;
import org.apache.storm.topology.base.BaseRichBolt;
import org.apache.storm.topology.base.BaseRichSpout;
import org.apache.storm.tuple.Fields;
import org.apache.storm.tuple.Tuple;
import org.apache.storm.tuple.Values;
import org.apache.storm.utils.Utils;

public class StormTopology {

    public static class MySpout extends BaseRichSpout{
        private Map conf;
        private TopologyContext context;
        private SpoutOutputCollector collector;
        public void open(Map conf, TopologyContext context,
                SpoutOutputCollector collector) {
            this.conf = conf;
            this.collector = collector;
            this.context = context;
        }

        int num = ;
        public void nextTuple() {
            num++;
            System.out.println("spout:"+num);
            this.collector.emit(new Values(num));
            Utils.sleep();
        }

        public void declareOutputFields(OutputFieldsDeclarer declarer) {
            declarer.declare(new Fields("num"));
        }

    }

    public static class MyBolt extends BaseRichBolt{

        private Map stormConf;
        private TopologyContext context;
        private OutputCollector collector;
        public void prepare(Map stormConf, TopologyContext context,
                OutputCollector collector) {
            this.stormConf = stormConf;
            this.context = context;
            this.collector = collector;
        }

        int sum = ;
        public void execute(Tuple input) {
            Integer num = input.getIntegerByField("num");
            sum += num;
            System.out.println("sum="+sum);
        }

        public void declareOutputFields(OutputFieldsDeclarer declarer) {

        }

    }

    public static void main(String[] args) {
        TopologyBuilder topologyBuilder = new TopologyBuilder();
        String spout_id = MySpout.class.getSimpleName();
        String bolt_id = MyBolt.class.getSimpleName();

        topologyBuilder.setSpout(spout_id, new MySpout());
        topologyBuilder.setBolt(bolt_id, new MyBolt()).shuffleGrouping(spout_id);

        Config config = new Config();
        String topology_name = StormTopology.class.getSimpleName();
        if(args.length==){
            //在本地运行
            LocalCluster localCluster = new LocalCluster();
            localCluster.submitTopology(topology_name, config, topologyBuilder.createTopology());
        }else{
            //在集群运行
            try {
                StormSubmitter.submitTopology(topology_name, config, topologyBuilder.createTopology());
            } catch (AlreadyAliveException e) {
                e.printStackTrace();
            } catch (InvalidTopologyException e) {
                e.printStackTrace();
            } catch (AuthorizationException e) {
                e.printStackTrace();
            }
        }

    }

}

[hadoop@master apache-storm-1.0.]$ pwd
/home/hadoop/app/apache-storm-1.0.
[hadoop@master apache-storm-1.0.]$ ll
total
drwxrwxr-x   hadoop hadoop   May  : bin
-rw-r--r--   hadoop hadoop  Jul    CHANGELOG.md
drwxrwxr-x   hadoop hadoop   Jul  : conf
drwxrwxr-x   hadoop hadoop   Jul    examples
drwxrwxr-x  hadoop hadoop   May  : external
drwxrwxr-x   hadoop hadoop   Jul    extlib
drwxrwxr-x   hadoop hadoop   Jul    extlib-daemon
drwxrwxr-x   hadoop hadoop   May  : lib
-rw-r--r--   hadoop hadoop  Jul    LICENSE
drwxrwxr-x   hadoop hadoop   May  : log4j2
drwxrwxr-x   hadoop hadoop   May  : logs
-rw-r--r--   hadoop hadoop    Jul    NOTICE
drwxrwxr-x   hadoop hadoop   May  : public
-rw-r--r--   hadoop hadoop  Jul    README.markdown
-rw-r--r--   hadoop hadoop      Jul    RELEASE
-rw-r--r--   hadoop hadoop  Jul    SECURITY.md
[hadoop@master apache-storm-1.0.]$ mkdir jar
[hadoop@master apache-storm-1.0.]$ cd jar/
[hadoop@master jar]$ pwd
/home/hadoop/app/apache-storm-1.0./jar
[hadoop@master jar]$ ll
total
[hadoop@master jar]$ rz

[hadoop@master jar]$ ll
total
-rw-r--r--  hadoop hadoop  Jul  : StormTopology.jar
[hadoop@master jar]$ 

　　提交作业之前

[hadoop@master apache-storm-1.0.]$ pwd
/home/hadoop/app/apache-storm-1.0.
[hadoop@master apache-storm-1.0.]$ ll
total
drwxrwxr-x   hadoop hadoop   May  : bin
-rw-r--r--   hadoop hadoop  Jul    CHANGELOG.md
drwxrwxr-x   hadoop hadoop   Jul  : conf
drwxrwxr-x   hadoop hadoop   Jul    examples
drwxrwxr-x  hadoop hadoop   May  : external
drwxrwxr-x   hadoop hadoop   Jul    extlib
drwxrwxr-x   hadoop hadoop   Jul    extlib-daemon
drwxrwxr-x   hadoop hadoop   Jul  : jar
drwxrwxr-x   hadoop hadoop   May  : lib
-rw-r--r--   hadoop hadoop  Jul    LICENSE
drwxrwxr-x   hadoop hadoop   May  : log4j2
drwxrwxr-x   hadoop hadoop   May  : logs
-rw-r--r--   hadoop hadoop    Jul    NOTICE
drwxrwxr-x   hadoop hadoop   May  : public
-rw-r--r--   hadoop hadoop  Jul    README.markdown
-rw-r--r--   hadoop hadoop      Jul    RELEASE
-rw-r--r--   hadoop hadoop  Jul    SECURITY.md
[hadoop@master apache-storm-1.0.]$ bin/storm jar jar/StormTopology.jar zhouls.bigdata.stormDemo.StormTopology aaa
Running: /home/hadoop/app/jdk/bin/java -client -Ddaemon.name= -Dstorm.options= -Dstorm.home=/home/hadoop/app/apache-storm-1.0. -Dstorm.log.dir=/home/hadoop/app/apache-storm-1.0./logs -Djava.library.path=/usr/local/lib:/opt/local/lib:/usr/lib -Dstorm.conf.file= -cp /home/hadoop/app/apache-storm-1.0./lib/log4j-api-2.1.jar:/home/hadoop/app/apache-storm-1.0./lib/kryo-3.0..jar:/home/hadoop/app/apache-storm-1.0./lib/storm-rename-hack-1.0..jar:/home/hadoop/app/apache-storm-1.0./lib/log4j-core-2.1.jar:/home/hadoop/app/apache-storm-1.0./lib/slf4j-api-1.7..jar:/home/hadoop/app/apache-storm-1.0./lib/minlog-1.3..jar:/home/hadoop/app/apache-storm-1.0./lib/objenesis-2.1.jar:/home/hadoop/app/apache-storm-1.0./lib/clojure-1.7..jar:/home/hadoop/app/apache-storm-1.0./lib/servlet-api-2.5.jar:/home/hadoop/app/apache-storm-1.0./lib/log4j-slf4j-impl-2.1.jar:/home/hadoop/app/apache-storm-1.0./lib/log4j-over-slf4j-1.6..jar:/home/hadoop/app/apache-storm-1.0./lib/storm-core-1.0..jar:/home/hadoop/app/apache-storm-1.0./lib/disruptor-3.3..jar:/home/hadoop/app/apache-storm-1.0./lib/asm-5.0..jar:/home/hadoop/app/apache-storm-1.0./lib/reflectasm-1.10..jar:jar/StormTopology.jar:/home/hadoop/app/apache-storm-1.0./conf:/home/hadoop/app/apache-storm-1.0./bin -Dstorm.jar=jar/StormTopology.jar zhouls.bigdata.stormDemo.StormTopology aaa
 [main] INFO  o.a.s.StormSubmitter - Generated ZooKeeper secret payload for MD5-digest: -:-
 [main] INFO  o.a.s.s.a.AuthUtils - Got AutoCreds []
 [main] INFO  o.a.s.StormSubmitter - Uploading topology jar jar/StormTopology.jar to assigned location: /home/hadoop/data/storm/nimbus/inbox/stormjar-cf402e8a-abf7-46bc-a452-14b53aa6b25e.jar
 [main] INFO  o.a.s.StormSubmitter - Successfully uploaded topology jar to assigned location: /home/hadoop/data/storm/nimbus/inbox/stormjar-cf402e8a-abf7-46bc-a452-14b53aa6b25e.jar
 [main] INFO  o.a.s.StormSubmitter - Submitting topology StormTopology in distributed mode with conf {"storm.zookeeper.topology.auth.scheme":"digest","storm.zookeeper.topology.auth.payload":"-5252258187769573644:-8540038416575654367"}
 [main] INFO  o.a.s.StormSubmitter - Finished submitting topology: StormTopology
[hadoop@master apache-storm-1.0.]$ 

　　然后，查看storm 的ui界面

　　为什么，会是如上的数字呢？大家要学，就要深入去学和理解。

　　因为，默认Workers是1。所以是如上如图所示。

　　　　点击进去

　　由此可见，

　　StormTopology默认是只有1个Worker、3个executors、3个tasks。