org.apache.beam.sdk.extensions.sketching

Class ApproximateDistinct.RetrieveCardinality

java.lang.Object

org.apache.beam.sdk.extensions.sketching.ApproximateDistinct.RetrieveCardinality

Enclosing class:

ApproximateDistinct

public static class ApproximateDistinct.RetrieveCardinality
extends Object

Utility class that provides DoFns to retrieve the cardinality from a HyperLogLogPlus structure in a global or perKey context.

Constructor Summary

Constructors

Constructor and Description
RetrieveCardinality()

Method Summary

Modifier and Type	Method and Description
static DoFn<com.clearspring.analytics.stream.cardinality.HyperLogLogPlus,Long>	globally()
static <K> DoFn<KV<K,com.clearspring.analytics.stream.cardinality.HyperLogLogPlus>,KV<K,Long>>	perKey()

Methods inherited from class java.lang.Object

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

Constructor Detail

RetrieveCardinality

public RetrieveCardinality()

Method Detail

perKey

public static <K> DoFn<KV<K,com.clearspring.analytics.stream.cardinality.HyperLogLogPlus>,KV<K,Long>> perKey()

globally

public static DoFn<com.clearspring.analytics.stream.cardinality.HyperLogLogPlus,Long> globally()