JoinUtils (Apache Crunch 0.8.0 API)

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org.apache.crunch.lib.join
Class JoinUtils

java.lang.Object
  org.apache.crunch.lib.join.JoinUtils

Utilities that are useful in joining multiple data sets via a MapReduce.

Nested Class Summary

static class JoinUtils.AvroIndexedRecordPartitioner<K,V>


static class JoinUtils.AvroPairGroupingComparator<T>


static class JoinUtils.TupleWritableComparator


static class JoinUtils.TupleWritablePartitioner


Constructor Summary

JoinUtils()


Method Summary

static Class<? extends org.apache.hadoop.io.RawComparator> getGroupingComparator(PTypeFamily typeFamily)


static Class<? extends org.apache.hadoop.mapreduce.Partitioner> getPartitionerClass(PTypeFamily typeFamily)


Methods inherited from class java.lang.Object

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

Nested Class Summary
`static class`	`JoinUtils.AvroIndexedRecordPartitioner<K,V>`
`static class`	`JoinUtils.AvroPairGroupingComparator<T>`
`static class`	`JoinUtils.TupleWritableComparator`
`static class`	`JoinUtils.TupleWritablePartitioner`

Constructor Summary
`JoinUtils()`

Method Summary
`static Class<? extends org.apache.hadoop.io.RawComparator>`	`getGroupingComparator(PTypeFamily typeFamily)`
`static Class<? extends org.apache.hadoop.mapreduce.Partitioner>`	`getPartitionerClass(PTypeFamily typeFamily)`

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

public JoinUtils()

Method Detail

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

public static Class<? extends org.apache.hadoop.io.RawComparator> getGroupingComparator(PTypeFamily typeFamily)