org.apache.tez.mapreduce.examples

Class GroupByOrderByMRRTest.MyMapper

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<Object,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

org.apache.tez.mapreduce.examples.GroupByOrderByMRRTest.MyMapper

Enclosing class:

GroupByOrderByMRRTest

public static class GroupByOrderByMRRTest.MyMapper
extends org.apache.hadoop.mapreduce.Mapper<Object,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

Mapper takes in a single line as input containing employee name and department name and then emits department name with count of 1

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper

org.apache.hadoop.mapreduce.Mapper.Context

Constructor Summary

Constructors

Constructor and Description
GroupByOrderByMRRTest.MyMapper()

Method Summary

Methods

Modifier and Type	Method and Description
void	map(Object key, org.apache.hadoop.io.Text value, org.apache.hadoop.mapreduce.Mapper.Context context)

Methods inherited from class org.apache.hadoop.mapreduce.Mapper

cleanup, run, setup

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GroupByOrderByMRRTest.MyMapper

public GroupByOrderByMRRTest.MyMapper()

Method Detail

map

public void map(Object key,
       org.apache.hadoop.io.Text value,
       org.apache.hadoop.mapreduce.Mapper.Context context)
         throws IOException,
                InterruptedException

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<Object,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

Throws:

IOException

InterruptedException