β

Storm 整合 Hbase

Waiting For You 25 阅读

1.依赖

<dependency>
      <groupId>org.apache.storm</groupId>
      <artifactId>storm-hbase</artifactId>
      <version>1.1.1</version>
      <exclusions>
        <exclusion>
          <groupId>com.google.guava</groupId>
          <artifactId>guava</artifactId>
        </exclusion>
      </exclusions>
      <type>jar</type>
    </dependency>
<dependency>
      <groupId>com.google.guava</groupId>
      <artifactId>guava</artifactId>
      <version>21.0</version>
    </dependency>
<dependency>
      <groupId>org.apache.hadoop</groupId>
      <artifactId>hadoop-client</artifactId>
      <version>${hadoop.version}</version>
      <exclusions>
        <exclusion>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-log4j12</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>org.apache.hadoop</groupId>
      <artifactId>hadoop-hdfs</artifactId>
      <version>${hadoop.version}</version>
      <exclusions>
        <exclusion>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-log4j12</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>org.apache.hadoop</groupId>
      <artifactId>hadoop-common</artifactId>
      <version>${hadoop.version}</version>
      <exclusions>
        <exclusion>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-log4j12</artifactId>
        </exclusion>
      </exclusions>
    </dependency>

2. hbase 创建表

create 'wc','cf'

3. 实现

package com.waiting;


import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.storm.Config;
import org.apache.storm.LocalCluster;
import org.apache.storm.spout.SpoutOutputCollector;
import org.apache.storm.task.OutputCollector;
import org.apache.storm.task.TopologyContext;
import org.apache.storm.topology.BasicOutputCollector;
import org.apache.storm.topology.OutputFieldsDeclarer;
import org.apache.storm.topology.TopologyBuilder;
import org.apache.storm.topology.base.BaseBasicBolt;
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;

import java.io.IOException;
import java.util.*;

public class LocalWordCountHbaseStormTopology {


    public static class DataSourceSpout extends BaseRichSpout {

        private SpoutOutputCollector collector;

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


        public static final String[] words = new String[]{"apple", "orange", "pineapple", "bannaer"};

        @Override
        public void nextTuple() {
             Random random = new Random();
             String word = words[random.nextInt(words.length)];

             this.collector.emit(new Values(word));

             System.out.println("word:" + word);

            Utils.sleep(1000);

        }

        @Override
        public void declareOutputFields(OutputFieldsDeclarer declarer) {

            declarer.declare(new Fields("line")
            );
        }
    }

    public static class SplitBolt extends BaseRichBolt{

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

        @Override
        public void execute(Tuple input) {
            String word = input.getStringByField("line");
            this.collector.emit(new Values(word));
        }

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

    public static class CountBolt extends BaseRichBolt{

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

        Map<String, Integer> map = new HashMap<String, Integer>();
        @Override
        public void execute(Tuple input) {
            String word = input.getStringByField("word");
            Integer count = map.get(word);
            if(count == null){
                count = 0;
            }
            count ++;
            map.put(word, count);

            this.collector.emit(new Values(word, map.get(word)));
        }

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




    public static class MyHBaseBolt extends BaseBasicBolt {
        private Connection connection;
        private Table table;

        @Override
        public void prepare(Map stormConf, TopologyContext context) {
            Configuration config = HBaseConfiguration.create();
            config.set("hbase.rootdir","hdfs://localhost:9000/hbase");
            try {
                connection = ConnectionFactory.createConnection(config);
//示例都是对同一个table进行操作,因此直接将Table对象的创建放在了prepare,在bolt执行过程中可以直接重用。
                table = connection.getTable(TableName.valueOf("wc"));
            } catch (IOException e) {
                //do something to handle exception
                e.printStackTrace();
            }
        }
        @Override
        public void execute(Tuple tuple, BasicOutputCollector basicOutputCollector) {
            String word = tuple.getStringByField("word");
            Integer count = tuple.getIntegerByField("count");
            try {
                //以各个单词作为row key
                Put put = new Put(Bytes.toBytes(word));
                //将被计数的单词写入cf:words列
                put.addColumn(Bytes.toBytes("cf"), Bytes.toBytes("word"), Bytes.toBytes(word));
                //将单词的计数写入cf:counts列
                put.addColumn(Bytes.toBytes("cf"), Bytes.toBytes("count"), Bytes.toBytes(count));
                table.put(put);
            } catch (IOException e) {
                //do something to handle exception
                e.printStackTrace();
            }
        }
        @Override
        public void cleanup() {
            //关闭table
            try {
                if(table != null) table.close();
            } catch (Exception e){
                //do something to handle exception
            } finally {
                //在finally中关闭connection
                try {
                    connection.close();
                } catch (IOException e) {
                    //do something to handle exception
                }
            }
        }
        @Override
        public void declareOutputFields(OutputFieldsDeclarer outputFieldsDeclarer) {
            //示例中本bolt不向外发射数据,所以没有再做声明
        }
    }


    public static void main(String[] args){

        Config config = new Config();

        Map<String, Object> hbaseConf = new HashMap<String, Object>();

        hbaseConf.put("hbase.rootdir", "hdfs://localhost:9000/hbase");
        config.put("hbase.conf", hbaseConf);

        TopologyBuilder builder = new TopologyBuilder();
        builder.setSpout("DataSourceSpout", new DataSourceSpout());
        builder.setBolt("SplitBolt", new SplitBolt()).shuffleGrouping("DataSourceSpout");
        builder.setBolt("CountBolt", new CountBolt()).shuffleGrouping("SplitBolt");

        builder.setBolt("MyHBaseBolt", new MyHBaseBolt()).shuffleGrouping("CountBolt");

        LocalCluster cluster = new LocalCluster();
        cluster.submitTopology("LocalWordCountStormTopology", config, builder.createTopology());
    }
}

http://www.waitingfy.com/archives/4551

作者:Waiting For You
记录一些关于android,cocos2d-x,objective-c,mfc,directX,c++,数学的东西
原文地址:Storm 整合 Hbase, 感谢原作者分享。

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