流量统计之自定义Reducer类（第三步）

1、AccessReducer.java

package com.imooc.bigdata.hadoop.mr.access;

import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Reducer;

import java.io.IOException;

public class AccessReducer extends Reducer<Text, Access, Text, Access> {

    /*
     * key : 手机号
     * values ：<Access, Access>
     */
    @Override
    protected void reduce(Text key, Iterable<Access> values, Context context) throws IOException, InterruptedException {

        long ups = 0;
        long downs = 0;

        for (Access access : values){
            ups += access.getUp();
            downs += access.getDown();
        }

        context.write(key, new Access(key.toString(), ups, downs));


    }
}