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org.apache.crunch
Class GroupingOptions

java.lang.Object
  org.apache.crunch.GroupingOptions

All Implemented Interfaces:

Serializable

public class GroupingOptions
extends Object
implements Serializable

Options that can be passed to a groupByKey operation in order to exercise finer control over how the partitioning, grouping, and sorting of keys is performed.

See Also:

Serialized Form

Nested Class Summary

static class

GroupingOptions.Builder Builder class for creating GroupingOptions instances.

Method Summary

static GroupingOptions.Builder	builder()
void	configure(org.apache.hadoop.mapreduce.Job job)
Class<? extends org.apache.hadoop.io.RawComparator>	getGroupingComparatorClass()
int	getNumReducers()
Class<? extends org.apache.hadoop.mapreduce.Partitioner>	getPartitionerClass()
Class<? extends org.apache.hadoop.io.RawComparator>	getSortComparatorClass()
Set<SourceTarget<?>>	getSourceTargets()
boolean	isCompatibleWith(GroupingOptions other)
boolean	requireSortedKeys()

Methods inherited from class java.lang.Object

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

Method Detail

getNumReducers

public int getNumReducers()

requireSortedKeys

public boolean requireSortedKeys()

getSortComparatorClass

public Class<? extends org.apache.hadoop.io.RawComparator> getSortComparatorClass()

getGroupingComparatorClass

public Class<? extends org.apache.hadoop.io.RawComparator> getGroupingComparatorClass()

getPartitionerClass

public Class<? extends org.apache.hadoop.mapreduce.Partitioner> getPartitionerClass()

getSourceTargets

public Set<SourceTarget<?>> getSourceTargets()

configure

public void configure(org.apache.hadoop.mapreduce.Job job)

isCompatibleWith

public boolean isCompatibleWith(GroupingOptions other)

builder

public static GroupingOptions.Builder builder()