storm 初识编码

#storm.yaml	  配置
#zookeeper 
storm.zookeeper.servers:
    - "bigdata01"
    - "bigdata02"
    - "bigdata03"
#本地存放数据的路径
storm.local.dir: "/apps/storm"
#nimbus master
nimbus.seeds: ["bigdata00"]
#workder端口
supervisor.slots.ports:
    - 6700
    - 6701
    - 6702
    - 6703
	
	启动命令
	bin/ nohup storm nimbus &
	
	bin/ nohup storm supervisor &
	bin/ nohup storm ui &
--------------------------------------------------------------------------------------
package com.hgs.storm;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.storm.Config;
import org.apache.storm.LocalCluster;
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.IRichBolt;
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;
public class StormWordCountTest {
	public static void main(String[] args) throws AlreadyAliveException, InvalidTopologyException, AuthorizationException, InterruptedException {
		TopologyBuilder builder = new TopologyBuilder();
		builder.setSpout("wordspout", new WordCountSpout(), 3);
		builder.setBolt("splitword", (IRichBolt) new WordSpliteBolt(), 2).shuffleGrouping("wordspout");
		//word 是splitword发出的字段，如第九十行
		builder.setBolt("wordcount", new WordCountBolt(), 2).fieldsGrouping("splitword", new Fields("word"));
		Config config = new Config();
		config.setNumWorkers(2);
/*		StormSubmitter.submitTopology("words-count", config, builder.createTopology());
	
		if(args!=null && args.length>0) {
			StormSubmitter.submitTopology(args[0], config, builder.createTopology());
		}else {
			LocalCluster cluster = new LocalCluster();
			
		}*/
		LocalCluster cluster = new LocalCluster();
		cluster.submitTopology("words-count", config, builder.createTopology());
		
	}
}
class WordCountSpout extends BaseRichSpout{
	private static final long serialVersionUID = 1L;
	//从open方法中的到collector,用于declareOutputFields 方法发出字段信息
	SpoutOutputCollector collector = null;
	@Override
	public void open(Map conf, TopologyContext context, SpoutOutputCollector collector) {
		this.collector = collector;
	}
	@Override
	public void nextTuple() {		
		collector.emit(new Values(" this is my first storm program so i hope it will success"));
	}
	@Override
	public void declareOutputFields(OutputFieldsDeclarer declarer) {
		declarer.declare( new Fields("message"));
	}
	
}
class WordSpliteBolt extends BaseRichBolt{
	private static final long serialVersionUID = 1L;
	OutputCollector collector = null;
	@Override
	public void prepare(Map stormConf, TopologyContext context, OutputCollector collector) {
		this.collector = collector;
	}
	@Override
	public void execute(Tuple input) {
		String line  = input.getString(0);
		String[] words  = line.split(" ");
		for(String wd : words) {
			collector.emit(new Values(wd ,1));
		}
	
	}
	@Override
	public void declareOutputFields(OutputFieldsDeclarer declarer) {
		declarer.declare(new Fields("word","num"));
	}
	
}
class WordCountBolt extends BaseRichBolt{
	ConcurrentHashMap<String, Integer> wordsMap = new ConcurrentHashMap<String, Integer>();
	private static final long serialVersionUID = 1L;
	OutputCollector collector = null;
	@Override
	public void prepare(Map stormConf, TopologyContext context, OutputCollector collector) {
		this.collector = collector;
	}
	@Override
	public void execute(Tuple input) {
		String word = input.getString(0);
		Integer num = input.getInteger(1);
		if(wordsMap.containsKey(word)) {
			wordsMap.put(word, wordsMap.get(word)+num);
		}else {
			wordsMap.put(word, num);
		}
		System.out.println(word +"----"+wordsMap.get(word));
	}
	@Override
	public void declareOutputFields(OutputFieldsDeclarer declarer) {
		
	}
	
	
}

来自 “ ITPUB博客 ” ，链接：http://blog.itpub.net/31506529/viewspace-2214253/，如需转载，请注明出处，否则将追究法律责任。

转载于:http://blog.itpub.net/31506529/viewspace-2214253/