Operator_reduce

package com.bjsxt.spark.actions;

import java.util.Arrays;

import org.apache.spark.SparkConf;
import org.apache.spark.api.java.JavaRDD;
import org.apache.spark.api.java.JavaSparkContext;
import org.apache.spark.api.java.JavaSparkContext;
import org.apache.spark.api.java.function.Function2;
/**
* reduce
*
* 根据聚合逻辑聚合数据集中的每个元素。
* @author root
*
*/
public class Operator_reduce {
public static void main(String[] args) {
SparkConf conf = new SparkConf();
conf.setMaster("local").setAppName("reduce");
JavaSparkContext sc = new JavaSparkContext(conf);
JavaRDD<Integer> parallelize = sc.parallelize(Arrays.asList(1,2,3,4,5));
Integer reduceResult = parallelize.reduce(new Function2<Integer, Integer, Integer>() {
private static final long serialVersionUID = 1L;

@Override
public Integer call(Integer v1, Integer v2) throws Exception {
return v1+v2;
}
});
System.out.println(reduceResult);
sc.stop();
}
}