package com.bjsxt.spark.others.pvuv;
import java.util.List;
import org.apache.spark.SparkConf;
import org.apache.spark.api.java.JavaPairRDD;
import org.apache.spark.api.java.JavaRDD;
import org.apache.spark.api.java.JavaSparkContext;
import org.apache.spark.api.java.function.Function;
import org.apache.spark.api.java.function.Function2;
import org.apache.spark.api.java.function.PairFunction;
import scala.Tuple2;
public class Pv {
public static void main(String[] args) {
SparkConf conf = new SparkConf();
conf.setMaster("local").setAppName("PV");
JavaSparkContext sc = new JavaSparkContext(conf);
JavaRDD<String> lines = sc.textFile("./pvuvdata");
JavaPairRDD<String, Integer> ipWeb = lines.mapToPair(new PairFunction<String, String, Integer>() {
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public Tuple2<String, Integer> call(String line) throws Exception {
return new Tuple2<String, Integer>(line.split(" ")[5],1);
}
});
JavaPairRDD<String, Integer> mapToPair = ipWeb.reduceByKey(new Function2<Integer, Integer, Integer>() {
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public Integer call(Integer v1, Integer v2) throws Exception {
return v1+v2;
}
}).mapToPair(new PairFunction<Tuple2<String,Integer>, Integer, String>() {
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public Tuple2<Integer, String> call(Tuple2<String, Integer> t)
throws Exception {
return new Tuple2<Integer, String>(t._2,t._1);
}
}).sortByKey(false).mapToPair(new PairFunction<Tuple2<Integer,String>, String,Integer>() {
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public Tuple2<String, Integer> call(Tuple2<Integer, String> t)
throws Exception {
return new Tuple2<String, Integer>(t._2,t._1) ;
}
});
List<Tuple2<String, Integer>> take = mapToPair.take(5);
for(Tuple2<String, Integer> t:take){
System.out.println(t);
}
sc.stop();
}
}