org.apache.hadoop.examples

Class SecondarySort.MapClass

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,SecondarySort.IntPair,org.apache.hadoop.io.IntWritable>

org.apache.hadoop.examples.SecondarySort.MapClass

Enclosing class:

SecondarySort

public static class SecondarySort.MapClass
extends Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,SecondarySort.IntPair,org.apache.hadoop.io.IntWritable>

Read two integers from each line and generate a key, value pair as ((left, right), right).

Nested Class Summary

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

Mapper.Context

Constructor Summary

Constructors

Constructor and Description
SecondarySort.MapClass()

Method Summary

Methods

Modifier and Type	Method and Description
void	map(org.apache.hadoop.io.LongWritable inKey, org.apache.hadoop.io.Text inValue, Mapper.Context context) Called once for each key/value pair in the input split.

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

SecondarySort.MapClass

public SecondarySort.MapClass()

Method Detail

map

public void map(org.apache.hadoop.io.LongWritable inKey,
       org.apache.hadoop.io.Text inValue,
       Mapper.Context context)
         throws java.io.IOException,
                java.lang.InterruptedException

Description copied from class: Mapper

Called once for each key/value pair in the input split. Most applications should override this, but the default is the identity function.

Overrides:

map in class Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,SecondarySort.IntPair,org.apache.hadoop.io.IntWritable>

Throws:

java.io.IOException

java.lang.InterruptedException