weka.hadoop
Class HadoopExperiment.Map

java.lang.Object
  org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>
      weka.hadoop.HadoopExperiment.Map

Enclosing class:

HadoopExperiment

public static class HadoopExperiment.Map
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

Mapper class that read a whole file as input if its size is small, or read N lines as an inputsplit if input file is large. All the calculations are running here and it sends result strings to Reducer class. Currently It only support cross-validation.

Author:

zy53

Nested Class Summary

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

org.apache.hadoop.mapreduce.Mapper.Context

Constructor Summary

HadoopExperiment.Map()

Method Summary

void	map(org.apache.hadoop.io.LongWritable 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

HadoopExperiment.Map

public HadoopExperiment.Map()

Method Detail

map

public void map(org.apache.hadoop.io.LongWritable 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<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

Throws:

IOException

InterruptedException