storm sum aggregate 原语 聚合 本地测试

编写storm程序，对数据进行聚合并且写入到mysql，

本文  主要说明数据中有多个字段需要进行sum或其他操作时的程序写法

1.主程序main方法，storm 拓扑运行入口

public class CopyOfPvTopo {

	public static void main(String[] args) throws Exception {
		System.out.println("--------------------------------------------------------------------------start");
		BrokerHosts brokerHosts = new ZkHosts(Const.ZK_STR); //zookeeper配置主机名集合
		TridentKafkaConfig kafkaConfig = new TridentKafkaConfig(brokerHosts, Const.PVUV_TOPIC, "20160607p");//对接kafka，接收某一个管道
		kafkaConfig.scheme = new SchemeAsMultiScheme(new StringScheme());

　　　　　　　　　//模拟批处理数据
		FixedBatchSpout spout = new FixedBatchSpout(new Fields("str"), 3,
	               new Values("111|2|1|1|1|1|1|1|1|1|1|1|1|1"),
	               new Values("111|2|1|1|1|1|1|1|1|1|1|1|1|1"),
	               new Values("111|2|1|1|1|1|1|1|1|1|1|1|1|1"),
	               new Values("111|2|1|1|1|1|1|1|1|1|1|1|1|1"));
//	   spout.setCycle(true);//是否循环提交数据

		TransactionalTridentKafkaSpout kafkaSpout = new TransactionalTridentKafkaSpout(kafkaConfig);//本地测试没用
		TridentTopology topology = new TridentTopology();//建一个拓扑
		topology.newStream("20160607p", spout)//读取模拟数据
			.parallelismHint(20)
			.shuffle()
			.each(new Fields("str"), new Senquece(), new Fields("mapid", "pv", "uv"))//处理原数据
			.parallelismHint(80)
			.groupBy(new Fields("mapid","uv","pv")).chainedAgg()//开始调用链
			.aggregate(new Fields("uv"), new SumAgg(), new Fields("sumuv"))//求和uv
			.aggregate(new Fields("pv"), new SumAgg(), new Fields("sumpv")).chainEnd()//结束调用链
			.parallelismHint(35)
			.each(new Fields("mapid", "sumpv", "sumuv"), new StoreFilter())//发送到下一步
			.parallelismHint(20); 
		   Config conf = new Config();  
		    conf.setDebug(false);
		LocalCluster cluster = new LocalCluster();  
	      cluster.submitTopology(Const.PVUV_TOPO, conf, topology.build());  
//	      Utils.sleep(100000);  
//	      cluster.killTopology("firstTopo");  
//	      cluster.shutdown();
	}
}

　　2.sum类，做sum是需要用到的类在上面的类中可以找到调用

public class SumAgg implements CombinerAggregator<Integer> {

    private static final long serialVersionUID = -6764153182395797633L;
    
    @Override
    public Integer init(TridentTuple tuple) {
        return tuple.getInteger(0);
    }

    @Override
    public Integer combine(Integer val1, Integer val2) {
        return val1 + val2;
    }

    @Override
    public Integer zero() {
        return 0;
    }

}