cascading.tuple.hadoop.util

Class GroupingPartitioner

java.lang.Object

cascading.tuple.util.TupleHasher

cascading.tuple.hadoop.util.HasherPartitioner

cascading.tuple.hadoop.util.GroupingPartitioner

All Implemented Interfaces:

java.io.Serializable, org.apache.hadoop.conf.Configurable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Partitioner<cascading.tuple.Tuple,cascading.tuple.Tuple>

public class GroupingPartitioner
extends cascading.tuple.hadoop.util.HasherPartitioner
implements org.apache.hadoop.mapred.Partitioner<cascading.tuple.Tuple,cascading.tuple.Tuple>

Class GroupingPartitioner is an implementation of Partitioner.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class cascading.tuple.util.TupleHasher

cascading.tuple.util.TupleHasher.HashFunction

Field Summary

Fields inherited from class cascading.tuple.hadoop.util.HasherPartitioner

HASHER_PARTITIONER_USE_LEGACY_HASH

Fields inherited from class cascading.tuple.util.TupleHasher

hashFunction

Constructor Summary

Constructors

Constructor and Description
GroupingPartitioner()

Method Summary

Modifier and Type	Method and Description
void	configure(org.apache.hadoop.mapred.JobConf job)
int	getPartition(cascading.tuple.Tuple key, cascading.tuple.Tuple value, int numReduceTasks)

Methods inherited from class cascading.tuple.hadoop.util.HasherPartitioner

getConf, setConf

Methods inherited from class cascading.tuple.util.TupleHasher

getHashFunction, hashCode, initialize, isNull, merge, wrapTuple

Methods inherited from class java.lang.Object

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

Constructor Detail

GroupingPartitioner

public GroupingPartitioner()

Method Detail

getPartition

public int getPartition(cascading.tuple.Tuple key,
                        cascading.tuple.Tuple value,
                        int numReduceTasks)

Specified by:

getPartition in interface org.apache.hadoop.mapred.Partitioner<cascading.tuple.Tuple,cascading.tuple.Tuple>

configure

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

Specified by:

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