Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package Analysis.A4_High_Traffic_Countries; import org.apache.hadoop.io.IntWritable; import org.apache.hadoop.io.Text; import org.apache.hadoop.mapreduce.Mapper; import java.io.IOException; /** * * @author Chintan */ public class Top_10_Countries_by_User_Traffic_Mapper extends Mapper<Object, Text, Text, IntWritable> { private Text country; private IntWritable one = new IntWritable(1); public void map(Object key, Text value, Context context) throws IOException, InterruptedException { // get user info String[] userInfo = value.toString().split("\t"); String cID = userInfo[3]; // extract artist name country = new Text(cID); context.write(country, one); } }