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 com.tfm.utad.reducerdata; import java.io.IOException; import org.apache.hadoop.io.NullWritable; import org.apache.hadoop.io.Text; import org.apache.hadoop.mapreduce.Reducer; public class ReducerDataVerticaReducer extends Reducer<Text, ReducerVerticaValue, Text, NullWritable> { @Override public void reduce(Text key, Iterable<ReducerVerticaValue> values, Context context) throws IOException, InterruptedException { int count = 0; for (ReducerVerticaValue value : values) { if (count == 0) { context.write(new Text(value.toString()), NullWritable.get()); } else { if (count % 10 == 0) { context.write(new Text(value.toString()), NullWritable.get()); } } count++; } } }