oracle.spatial.hadoop.vector.binning.mapred

Class BinReducer

java.lang.Object

org.apache.hadoop.mapred.MapReduceBase

oracle.spatial.hadoop.vector.binning.mapred.BinReducer

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.LongWritable,RecordInfo,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text>

public class BinReducer
extends org.apache.hadoop.mapred.MapReduceBase
implements org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.LongWritable,RecordInfo,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text>

A subclass of Reducer that collects all the records assigned to a bin. Additionally calculates fields aggregations for each bin and emits the resulting records.

Constructor Summary

Constructors

Constructor and Description
BinReducer()

Method Summary

Methods

Modifier and Type	Method and Description
void	configure(org.apache.hadoop.mapred.JobConf jobConf)
void	reduce(org.apache.hadoop.io.LongWritable key, java.util.Iterator<RecordInfo> values, org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text> output, org.apache.hadoop.mapred.Reporter reporter)

Methods inherited from class org.apache.hadoop.mapred.MapReduceBase

close

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.Closeable

close

Constructor Detail

BinReducer

public BinReducer()

Method Detail

configure

public void configure(org.apache.hadoop.mapred.JobConf jobConf)

Specified by:

configure in interface org.apache.hadoop.mapred.JobConfigurable

Overrides:

configure in class org.apache.hadoop.mapred.MapReduceBase

reduce

public void reduce(org.apache.hadoop.io.LongWritable key,
                   java.util.Iterator<RecordInfo> values,
                   org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text> output,
                   org.apache.hadoop.mapred.Reporter reporter)
            throws java.io.IOException

Specified by:

reduce in interface org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.LongWritable,RecordInfo,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text>

Throws:

java.io.IOException