STORM入门之（TridentTopology集成Kafka）

基本

前几篇文章是StormTopology集成Kafka 是Storm基本入门知识 传送门：http://blog.csdn.net/yl3395017/article/details/77477716

这篇介绍TridentTopology集成Kafka 话不多说 上代码

Topology构建

package com.storm.topology;

import com.storm.trident.LogAggr;
import com.storm.trident.OutPrint;
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.kafka.BrokerHosts;
import org.apache.storm.kafka.StringScheme;
import org.apache.storm.kafka.ZkHosts;
import org.apache.storm.kafka.trident.OpaqueTridentKafkaSpout;
import org.apache.storm.kafka.trident.TridentKafkaConfig;
import org.apache.storm.spout.SchemeAsMultiScheme;
import org.apache.storm.trident.TridentTopology;
import org.apache.storm.tuple.Fields;

public class TridentKafkaTopology {

    public static void main(String[] args) throws AlreadyAliveException,InvalidTopologyException, AuthorizationException {
        TridentTopology topology = new TridentTopology();
        BrokerHosts brokerHosts = new ZkHosts("10.2.4.12:2181,10.2.4.13:2181,10.2.4.14:2181");
        TridentKafkaConfig kafkaCOnfig= new TridentKafkaConfig(brokerHosts, "test_rce_yjd");
        kafkaConfig.scheme = new SchemeAsMultiScheme(new StringScheme());
        OpaqueTridentKafkaSpout opaqueTridentKafkaSpout = new OpaqueTridentKafkaSpout(kafkaConfig);
        topology.newStream("kafka-trident", opaqueTridentKafkaSpout)
                .parallelismHint(3)
                .aggregate(new Fields("str"),new LogAggr(),new Fields("sysout"));
        StormTopology stormTopology = topology.build();
        LocalCluster cluster = new LocalCluster();
        Config cOnfig= new Config();
        config.setDebug(false);
        cluster.submitTopology("test", config,stormTopology);
    }
}

LogAggr聚合类

package com.storm.trident;

import org.apache.storm.trident.operation.BaseAggregator;
import org.apache.storm.trident.operation.TridentCollector;
import org.apache.storm.trident.tuple.TridentTuple;
import org.apache.storm.tuple.Values;
import java.util.HashMap;
import java.util.Map;

/**
 * Created with IntelliJ IDEA.
 * User: Administrator
 * Date: 17-9-1
 * Time: 下午2:26
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 */
public class  LogAggr  extends BaseAggregator> {
    private  int i  = 0;
    @Override
    public Map init(Object o, TridentCollector tridentCollector) {
        return new HashMap();
    }

    @Override
    public void aggregate(Map stringIntegerMap, TridentTuple objects, TridentCollector tridentCollector) {
        String location = objects.getString(0);
        System.out.println(location);        
    }

    @Override
    public void complete(Map stringIntegerMap, TridentCollector collector) {        
        collector.emit(new Values(stringIntegerMap));
    }
}