storm1.2.1-wordcount可靠的单词计数-2

源码下载：

https://download.csdn.net/download/adam_zs/10344447

在ReportBolt.java中，如果word.equals("f")则返回fail，目的为了测试消息处理的可靠性；

遇到fail错误，"e f" 这个句子会重新发送，在统计结果中e单词的统计次数明显多于其它单词数量；

运行结果：

package com.book.v3;

import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;

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 org.apache.storm.utils.Utils;

/**
 * @title: 数据源 

 * @author: wangzs 

 * @date: 2018年3月18日
 */
public class SentenceSpout extends BaseRichSpout {

	private ConcurrentHashMap pending;
	private SpoutOutputCollector spoutOutputCollector;
	private String[] sentences = { "a b", "c d", "e f" };

	@Override
	public void open(Map map, TopologyContext topologycontext, SpoutOutputCollector spoutoutputcollector) {
		this.spoutOutputCollector = spoutoutputcollector;
		this.pending = new ConcurrentHashMap();
	}

	@Override
	public void nextTuple() {
		for (String sentence : sentences) {
			Values values = new Values(sentence);
			UUID msgId = UUID.randomUUID();
			this.spoutOutputCollector.emit(values, msgId);
			this.pending.put(msgId, values);
			System.out.println("SentenceSpout==> " + values + " msgId=" + msgId);
		}
		Utils.sleep(1000);
	}

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

	@Override
	public void ack(Object msgId) {
		System.out.println("#####[ack]###### msgId=" + msgId + " values=" + this.pending.get(msgId));
		this.pending.remove(msgId);
	}

	@Override
	public void fail(Object msgId) {
		System.out.println("#####[fail]###### msgId=" + msgId + " values=" + this.pending.get(msgId));
		this.spoutOutputCollector.emit(this.pending.get(msgId), msgId);
	}

}

package com.book.v3;

import java.util.Map;

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;

/**
 * @title: 分隔单词 

 * @author: wangzs 

 * @date: 2018年3月18日
 */
public class SplitSentenceBolt extends BaseRichBolt {
	private OutputCollector outputCollector;

	@Override
	public void execute(Tuple tuple) {
		String sentence = tuple.getStringByField("sentence");
		String[] words = sentence.split(" ");
		for (String word : words) {
			this.outputCollector.emit(tuple, new Values(word));
		}
		this.outputCollector.ack(tuple);
		System.out.println("SplitSentenceBolt==> " + sentence + " msgId=" + tuple.getMessageId());
	}

	@Override
	public void prepare(Map map, TopologyContext topologycontext, OutputCollector outputcollector) {
		this.outputCollector = outputcollector;
	}

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

}

package com.book.v3;

import java.util.HashMap;
import java.util.Map;

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;

/**
 * @title: 实现单词计数 

 * @author: wangzs 

 * @date: 2018年3月18日
 */
public class WordCountBolt extends BaseRichBolt {
	private OutputCollector outputCollector;
	private HashMap counts = null;

	@Override
	public void prepare(Map map, TopologyContext topologycontext, OutputCollector outputcollector) {
		this.outputCollector = outputcollector;
		this.counts = new HashMap();
	}

	@Override
	public void execute(Tuple tuple) {
		String word = tuple.getStringByField("word");
		Integer count = counts.get(word);
		if (count == null) {
			count = 0;
		}
		count++;
		this.counts.put(word, count);
		this.outputCollector.emit(tuple, new Values(word, count));
		this.outputCollector.ack(tuple);
		System.out.println("WordCountBolt==> " + word + " msgId=" + tuple.getMessageId());
	}

	@Override
	public void declareOutputFields(OutputFieldsDeclarer outputfieldsdeclarer) {
		outputfieldsdeclarer.declare(new Fields("word", "count"));
	}

}

package com.book.v3;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

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.Tuple;

/**
 * @title: 实现上报bolt 

 * @author: wangzs 

 * @date: 2018年3月18日
 */
public class ReportBolt extends BaseRichBolt {
	private OutputCollector outputcollector;
	private HashMap reportCounts = null;

	@Override
	public void prepare(Map map, TopologyContext topologycontext, OutputCollector outputcollector) {
		this.reportCounts = new HashMap();
		this.outputcollector = outputcollector;
	}

	@Override
	public void execute(Tuple tuple) {
		String word = tuple.getStringByField("word");
		int count = tuple.getIntegerByField("count");

		if (word.equals("f")) {
			this.outputcollector.fail(tuple);
		} else {
			this.reportCounts.put(word, count);
			this.outputcollector.ack(tuple);
			System.out.println("ReportBolt==> " + word + " msgId=" + tuple.getMessageId());
		}

		System.out.println("~~~~~~~~~~~execute~~~~~~~~~~~");
		Set> entrySet = reportCounts.entrySet();
		for (Map.Entry entry : entrySet) {
			System.out.println(entry);
		}
	}

	@Override
	public void declareOutputFields(OutputFieldsDeclarer outputfieldsdeclarer) {

	}

	/**
	 * 在终止之前调用这个方法
	 */
	@Override
	public void cleanup() {
		Set> entrySet = reportCounts.entrySet();
		System.out.println("---------- FINAL COUNTS -----------");
		for (Map.Entry entry : entrySet) {
			System.out.println(entry);
		}
		System.out.println("-----------------------------------");
	}

}

package com.book.v3;

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.generated.StormTopology;
import org.apache.storm.topology.TopologyBuilder;
import org.apache.storm.tuple.Fields;
import org.apache.storm.utils.Utils;

/**
 * @title: 可靠的单词计数 

 * @author: wangzs 

 * @date: 2018年3月18日
 */
public class WordCountTopology {
	public static void main(String[] args) throws AlreadyAliveException, InvalidTopologyException, AuthorizationException {
		SentenceSpout sentenceSpout = new SentenceSpout();
		SplitSentenceBolt splitSentenceBolt = new SplitSentenceBolt();
		WordCountBolt wordCountBolt = new WordCountBolt();
		ReportBolt reportBolt = new ReportBolt();

		TopologyBuilder builder = new TopologyBuilder();
		builder.setSpout("sentenceSpout-1", sentenceSpout);
		builder.setBolt("splitSentenceBolt-1", splitSentenceBolt).shuffleGrouping("sentenceSpout-1");
		builder.setBolt("wordCountBolt-1", wordCountBolt).fieldsGrouping("splitSentenceBolt-1", new Fields("word"));
		builder.setBolt("reportBolt-1", reportBolt).globalGrouping("wordCountBolt-1");

		Config conf = new Config();
		conf.setDebug(false);
		if (args != null && args.length > 0) {
			conf.setNumWorkers(1);
			StormSubmitter.submitTopologyWithProgressBar(args[0], conf, builder.createTopology());
		} else {
			LocalCluster cluster = new LocalCluster();
			StormTopology topology = builder.createTopology();
			cluster.submitTopology("wordCountTopology-1", conf, topology);
			Utils.sleep(40000);
			cluster.killTopology("wordCountTopology-1");
			cluster.shutdown();
		}
	}
}