org.apache.hadoop.benchmarks.mapred
Class BenchmarkMapper

java.lang.Object
  extended by org.apache.hadoop.mapred.MapReduceBase
      extended by org.apache.hadoop.benchmarks.mapred.BenchmarkMapper
All Implemented Interfaces:
Closeable, JobConfigurable, Mapper

public class BenchmarkMapper
extends MapReduceBase
implements Mapper

takes inpt format as text lines, runs some processing on it and writes out data as text again.

Author:
sanjaydahiya

Constructor Summary
BenchmarkMapper()
           
 
Method Summary
 void map(WritableComparable key, Writable value, OutputCollector output, Reporter reporter)
          Maps a single input key/value pair into intermediate key/value pairs.
 String process(String line)
           
 
Methods inherited from class org.apache.hadoop.mapred.MapReduceBase
close, configure
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.apache.hadoop.mapred.JobConfigurable
configure
 
Methods inherited from interface org.apache.hadoop.io.Closeable
close
 

Constructor Detail

BenchmarkMapper

public BenchmarkMapper()
Method Detail

map

public void map(WritableComparable key,
                Writable value,
                OutputCollector output,
                Reporter reporter)
         throws IOException
Description copied from interface: Mapper
Maps a single input key/value pair into intermediate key/value pairs. Output pairs need not be of the same types as input pairs. A given input pair may map to zero or many output pairs. Output pairs are collected with calls to OutputCollector.collect(WritableComparable,Writable).

Specified by:
map in interface Mapper
Parameters:
key - the key
value - the values
output - collects mapped keys and values
Throws:
IOException

process

public String process(String line)


Copyright © 2006 The Apache Software Foundation