org.apache.hadoop.hbase.mapred
Class IdentityTableReduce

java.lang.Object
  org.apache.hadoop.mapred.MapReduceBase
      org.apache.hadoop.hbase.mapred.TableReduce<Text,MapWritable>
          org.apache.hadoop.hbase.mapred.IdentityTableReduce

All Implemented Interfaces:

Closeable, JobConfigurable, Reducer<Text,MapWritable,Text,MapWritable>

public class IdentityTableReduce
extends TableReduce<Text,MapWritable>

Write to table each key, record pair

Constructor Summary

IdentityTableReduce()

Method Summary

void	reduce(Text key, Iterator<MapWritable> values, OutputCollector<Text,MapWritable> output, Reporter reporter) No aggregation, output pairs of (key, record)

Methods inherited from class org.apache.hadoop.hbase.mapred.TableReduce

initJob

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

IdentityTableReduce

public IdentityTableReduce()

Method Detail

reduce

public void reduce(Text key,
                   Iterator<MapWritable> values,
                   OutputCollector<Text,MapWritable> output,
                   Reporter reporter)
            throws IOException

No aggregation, output pairs of (key, record)

Specified by:

reduce in interface Reducer<Text,MapWritable,Text,MapWritable>

Specified by:

reduce in class TableReduce<Text,MapWritable>

Parameters:

key - the key.

values - the list of values to reduce.

output - to collect keys and combined values.

reporter - facility to report progress.

Throws:

IOException

See Also:

TableReduce.reduce(org.apache.hadoop.io.WritableComparable, java.util.Iterator, org.apache.hadoop.mapred.OutputCollector, org.apache.hadoop.mapred.Reporter)