Storm 版本:
一、Spout 從外部數據源中讀取數據,隨機發送一個元組對象出去;
二、SplitBolt 接收 Spout 中輸出的元組對象,將元組中的數據切分紅單詞,並將切分後的單詞發射出去;
三、WordCountBolt 接收 SplitBolt 中輸出的單詞數組,對裏面單詞的頻率進行累加,將累加後的結果輸出。html
Java 版本:
一、讀取文件中的數據,一行一行的讀取;
二、將讀到的數據進行切割;
三、對切割後的數組中的單詞進行計算。java
Hadoop 版本:
一、按行讀取文件中的數據;
二、在 Mapper()函數中對每一行的數據進行切割,並輸出切割後的數據數組;
三、接收 Mapper()中輸出的數據數組,在 Reducer()函數中對數組中的單詞進行計算,將計算後的統計結果輸出。apache
storm的配置、eclipse裏maven的配置以及建立項目部分省略。數組
Mainclassapp
package com.test.stormwordcount; import backtype.storm.Config; import backtype.storm.LocalCluster; import backtype.storm.StormSubmitter; import backtype.storm.generated.AlreadyAliveException; import backtype.storm.generated.InvalidTopologyException; import backtype.storm.topology.TopologyBuilder; import backtype.storm.tuple.Fields; public class MainClass { public static void main(String[] args) throws AlreadyAliveException, InvalidTopologyException { //建立一個 TopologyBuilder TopologyBuilder tb = new TopologyBuilder(); tb.setSpout("SpoutBolt", new SpoutBolt(), 2); tb.setBolt("SplitBolt", new SplitBolt(), 2).shuffleGrouping("SpoutBolt"); tb.setBolt("CountBolt", new CountBolt(), 4).fieldsGrouping("SplitBolt", new Fields("word")); //建立配置 Config conf = new Config(); //設置 worker 數量 conf.setNumWorkers(2); //提交任務 //集羣提交 //StormSubmitter.submitTopology("myWordcount", conf, tb.createTopology()); //本地提交 LocalCluster localCluster = new LocalCluster(); localCluster.submitTopology("myWordcount", conf, tb.createTopology()); } }
SplitBolt 部分eclipse
package com.test.stormwordcount; import java.util.Map; import backtype.storm.task.OutputCollector; import backtype.storm.task.TopologyContext; import backtype.storm.topology.OutputFieldsDeclarer; import backtype.storm.topology.base.BaseRichBolt; import backtype.storm.tuple.Fields; import backtype.storm.tuple.Tuple; import backtype.storm.tuple.Values; public class SplitBolt extends BaseRichBolt{ OutputCollector collector; /** * 初始化 */ public void prepare(Map stormConf, TopologyContext context, OutputCollector collector) { this.collector = collector; } /** * 執行方法 */ public void execute(Tuple input) { String line = input.getString(0); String[] split = line.split(" "); for (String word : split) { collector.emit(new Values(word)); } } /** * 輸出 */ public void declareOutputFields(OutputFieldsDeclarer declarer) { declarer.declare(new Fields("word")); } }
CountBolt 部分maven
package com.test.stormwordcount; import java.util.HashMap; import java.util.Map; import backtype.storm.task.OutputCollector; import backtype.storm.task.TopologyContext; import backtype.storm.topology.OutputFieldsDeclarer; import backtype.storm.topology.base.BaseRichBolt; import backtype.storm.tuple.Tuple; public class CountBolt extends BaseRichBolt{ OutputCollector collector; Map<String, Integer> map = new HashMap<String, Integer>(); /** * 初始化 */ public void prepare(Map stormConf, TopologyContext context, OutputCollector collector) { this.collector = collector; } /** * 執行方法 */ public void execute(Tuple input) { String word = input.getString(0); if(map.containsKey(word)){ Integer c = map.get(word); map.put(word, c+1); }else{ map.put(word, 1); } //測試輸出 System.out.println("結果:"+map); } /** * 輸出 */ public void declareOutputFields(OutputFieldsDeclarer declarer) { } }
SpoutBolt 部分函數
package com.test.stormwordcount; import java.util.Map; 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 SpoutBolt extends BaseRichSpout{ SpoutOutputCollector collector; /** * 初始化方法 */ public void open(Map map, TopologyContext context, SpoutOutputCollector collector) { this.collector = collector; } /** * 重複調用方法 */ public void nextTuple() { collector.emit(new Values("hello world this is a test")); } /** * 輸出 */ public void declareOutputFields(OutputFieldsDeclarer declarer) { declarer.declare(new Fields("test")); } }
POM.XML 文件內容oop
<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>stormwordcount</artifactId> <version>0.9.6</version> <packaging>jar</packaging> <name>stormwordcount</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>org.apache.storm</groupId> <artifactId>storm-core</artifactId> <version>0.9.6</version> </dependency> </dependencies> <build> <plugins> <plugin> <artifactId>maven-assembly-plugin</artifactId> <configuration> <descriptorRefs> <descriptorRef>jar-with-dependencies</descriptorRef> </descriptorRefs> <archive> <manifest> <mainClass>com.test.stormwordcount.MainClass</mainClass> </manifest> </archive> </configuration> <executions> <execution> <id>make-assembly</id> <phase>package</phase> <goals> <goal>single</goal> </goals> </execution> </executions> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.7</source> <target>1.7</target> </configuration> </plugin> </plugins> </build>
基於Storm的WordCount須要eclipse安裝了maven插件,以前的大數據實踐安裝的eclipse版本爲Eclipse IDE for Eclipse Committers4.5.2,這個版本不自帶maven插件,後續安裝失敗了幾回(網上不少的教程都已經失效),這裏分享一下我成功安裝的方法:
使用連接下載,Help->Install New SoftWare
點擊Add,name輸入隨意,在location輸入下載eclipse的maven插件,下載地址能夠這樣獲取
點擊鏈接:http://www.eclipse.org/m2e/index.html 進入網站後點擊download,拉到最下面能夠看到不少eclipse maven插件的版本和發佈時間,選在適合eclipse的版本複製連接便可。建議取消選中Contack all update sites during install to find required software(耗時過久)。測試
可是安裝成功後仍是沒法配置(這裏緣由不太清楚,沒找到解決辦法),就直接上官網換成本身maven插件的JavaEE IDE了...
後續的maven的配置這些都比較順利,第一次建立maven-archetype-quickstat項目報錯,試了網上不少辦法都還沒成功,而後打開 Windows->Preferencs->Maven->Installation發現以前配置了的maven的安裝路徑沒了...從新配置了下就能夠建立項目了。
最後運行成功的結果: