datafu.hourglass.mapreduce
Class AvroKeyValueIdentityMapper

java.lang.Object
  org.apache.hadoop.mapreduce.Mapper<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object>
      datafu.hourglass.mapreduce.AvroKeyValueIdentityMapper

public class AvroKeyValueIdentityMapper
extends org.apache.hadoop.mapreduce.Mapper<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object>

A mapper which outputs key-value pairs as-is. It assumes the input is an Avro record having "key" and "value" fields. The output is these exact same fields.

Author:

"Matthew Hayes"

Nested Class Summary

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

org.apache.hadoop.mapreduce.Mapper.Context

Constructor Summary

AvroKeyValueIdentityMapper()

Method Summary

protected void

map(java.lang.Object keyObj, java.lang.Object valueObj, 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

AvroKeyValueIdentityMapper

public AvroKeyValueIdentityMapper()

Method Detail

map

protected void map(java.lang.Object keyObj,
                   java.lang.Object valueObj,
                   org.apache.hadoop.mapreduce.Mapper.Context context)
            throws java.io.IOException,
                   java.lang.InterruptedException

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object>

Throws:

java.io.IOException

java.lang.InterruptedException