Storm 把结果存到redis

Maven 依赖添加

 <dependency>
      <groupId>org.apache.storm</groupId>
      <artifactId>storm-redis</artifactId>
      <version>${storm.version}</version>
      <type>jar</type>
    </dependency>

package com.waiting;


import org.apache.storm.Config;
import org.apache.storm.LocalCluster;
import org.apache.storm.redis.bolt.RedisStoreBolt;
import org.apache.storm.redis.common.config.JedisPoolConfig;
import org.apache.storm.redis.common.mapper.RedisDataTypeDescription;
import org.apache.storm.redis.common.mapper.RedisStoreMapper;
import org.apache.storm.shade.org.apache.commons.io.FileUtils;
import org.apache.storm.spout.SpoutOutputCollector;
import org.apache.storm.task.OutputCollector;
import org.apache.storm.task.TopologyContext;
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.ITuple;
import org.apache.storm.tuple.Tuple;
import org.apache.storm.tuple.Values;
import org.apache.storm.utils.Utils;

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

public class LocalWordCountRedisStormTopology {


    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 WordCountStoreMapper implements RedisStoreMapper {
        private RedisDataTypeDescription description;
        private final String hashKey = "wordCount";

        public WordCountStoreMapper() {
            description = new RedisDataTypeDescription(
                    RedisDataTypeDescription.RedisDataType.HASH, hashKey);
        }

        @Override
        public RedisDataTypeDescription getDataTypeDescription() {
            return description;
        }

        @Override
        public String getKeyFromTuple(ITuple tuple) {
            return tuple.getStringByField("word");
        }

        @Override
        public String getValueFromTuple(ITuple tuple) {
            return tuple.getIntegerByField("count") + "";
        }
    }

    public static void main(String[] args){

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

        JedisPoolConfig poolConfig = new JedisPoolConfig.Builder()
                .setHost("127.0.0.1").setPort(6379).setPassword("test").build();
        RedisStoreMapper storeMapper = new WordCountStoreMapper();
        RedisStoreBolt storeBolt = new RedisStoreBolt(poolConfig, storeMapper);

        builder.setBolt("RedisStoreBolt", storeBolt).shuffleGrouping("CountBolt");

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

http://www.waitingfy.com/archives/4521

storm | RSS 2.0 | Respond | Trackback |