Storm學習demo

在storm集羣中真正運行Topology的主要有三個實例:工做進程丶線程和任務.

Storm集羣中的每臺機器上均可以運行多個工做進程,每一個工做進程又能夠建立多個線程,每一個線程能夠執行多個任務.

Storm可靠性:是經過對消息樹給定一個惟一的ID,每送一個消息,都會同步發送一個ack或fail,對於網絡的寬帶會有必定的消耗,若是對於可靠性要求不高,能夠經過使用不一樣的emit接口關閉該模式.

1、storm啓動類的定義。

package com.cmsz.storm.trading.test;

import backtype.storm.topology.TopologyBuilder;
import backtype.storm.tuple.Fields;

public class MainStorm {
  public static void main(String[] args) throws Exception {

    TopologyBuilder builder = new TopologyBuilder();
    builder.setSpout("A", new ASpout());
    builder.setBolt("B", new BBolt()).shuffleGrouping("A", "streamId_B");//componentId和streamId
    builder.setBolt("C", new CBolt()).shuffleGrouping("A", "streamId_C");//componentId和streamId
    builder.setBolt("D", new DBolt()).fieldsGrouping("B", new Fields("id"));//componentId和streamId
    builder.setBolt("E", new EBolt()).fieldsGrouping("C", new Fields("id"));
    Config conf = new Config();
    if (args != null && args.length > 0) {
      conf.setNumWorkers(1);
      StormSubmitter.submitTopology(args[0], conf, builder.createTopology());
    } else {
      LocalCluster cluster = new LocalCluster();
      cluster.submitTopology("myTopo", conf, builder.createTopology());
    }
  }
}

2、spout定義了streamId，接受的bolt要定義componentId與spout中定義的streamId("streamId_B"、"streamId_C")對應定義去接收，fiedsGrouping的new Fields("id")中的id要和componentId的對應bolt中new Fields("id","message")中的"id"對應就會以"id"進行分組

package com.cmsz.storm.trading.test;

import java.util.Map;
import java.util.Random;

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;
import backtype.storm.utils.Utils;

public class ASpout extends BaseRichSpout{
  SpoutOutputCollector collector;
  @Override
  public void open(Map conf, TopologyContext context, SpoutOutputCollector collector) {
    this.collector = collector;
  }

  @Override
  public void nextTuple() {
    Utils.sleep(10);
    final String[] words = new String[] {"B_nathan", "C_mike", "B_jackson", "C_golda", "B_bertels"};
    final Random rand = new Random();
    final String word = words[rand.nextInt(words.length)];
    if(word.indexOf("B_")>-1){
      collector.emit("streamId_B",new Values(word));
    }else if(word.indexOf("C_")>-1){
      collector.emit("streamId_C",new Values(word));
    }
  }

  @Override
  public void declareOutputFields(OutputFieldsDeclarer declarer) {
    declarer.declareStream("streamId_B", new Fields("streamId_B"));
    declarer.declareStream("streamId_C", new Fields("streamId_C"));
  }

  @Override
  public void ack(Object msgId) {
    super.ack(msgId);
  }
  
  @Override
  public void fail(Object msgId) {
    super.fail(msgId);
  }
}

package com.cmsz.storm.trading.test;

import java.util.Map;

import backtype.storm.task.TopologyContext;
import backtype.storm.topology.BasicOutputCollector;
import backtype.storm.topology.IBasicBolt;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Tuple;
import backtype.storm.tuple.Values;

public class BBolt implements IBasicBolt {

  @Override
  public void declareOutputFields(OutputFieldsDeclarer declarer) {
    declarer.declare(new Fields("id","message"));
  }

  @Override
  public Map<String, Object> getComponentConfiguration() {
    return null;
  }

  @Override
  public void prepare(Map stormConf, TopologyContext context) {
    
  }

  @Override
  public void execute(Tuple input, BasicOutputCollector collector) {
    String msg = input.getString(0);
    System.out.println(msg);
    collector.emit(new Values(msg,msg+"BBolt"));
  }

  @Override
  public void cleanup() {
    
  }


}

package com.cmsz.storm.trading.test;

import java.util.Map;

import backtype.storm.task.TopologyContext;
import backtype.storm.topology.BasicOutputCollector;
import backtype.storm.topology.IBasicBolt;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Tuple;
import backtype.storm.tuple.Values;

public class CBolt implements IBasicBolt {

  @Override
  public void declareOutputFields(OutputFieldsDeclarer declarer) {
    declarer.declare(new Fields("id","message"));
  }

  @Override
  public Map<String, Object> getComponentConfiguration() {
    return null;
  }

  @Override
  public void prepare(Map stormConf, TopologyContext context) {

  }

  @Override
  public void execute(Tuple input, BasicOutputCollector collector) {
    String msg = input.getString(0);
    System.out.println(msg);
    collector.emit(new Values(msg,msg+"CBolt"));
  }

  @Override
  public void cleanup() {

  }

}

package com.cmsz.storm.trading.test;

import java.util.Map;

import backtype.storm.task.TopologyContext;
import backtype.storm.topology.BasicOutputCollector;
import backtype.storm.topology.IBasicBolt;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Tuple;

public class DBolt implements IBasicBolt {

  @Override
  public void declareOutputFields(OutputFieldsDeclarer declarer) {
    declarer.declare(new Fields("message"));
  }

  @Override
  public Map<String, Object> getComponentConfiguration() {
    return null;
  }

  @Override
  public void prepare(Map stormConf, TopologyContext context) {
    
  }

  @Override
  public void execute(Tuple input, BasicOutputCollector collector) {
    System.out.println("DBolt"+input.getString(0));
  }

  @Override
  public void cleanup() {

  }

}

package com.cmsz.storm.trading.test;

import java.util.Map;

import backtype.storm.task.TopologyContext;
import backtype.storm.topology.BasicOutputCollector;
import backtype.storm.topology.IBasicBolt;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Tuple;

public class EBolt implements IBasicBolt {

  @Override
  public void declareOutputFields(OutputFieldsDeclarer declarer) {
    declarer.declare(new Fields("message"));
  }

  @Override
  public Map<String, Object> getComponentConfiguration() {
    return null;
  }

  @Override
  public void prepare(Map stormConf, TopologyContext context) {

  }

  @Override
  public void execute(Tuple input, BasicOutputCollector collector) {
    System.out.println("EBolt"+input.getString(0));
  }

  @Override
  public void cleanup() {
  }

}