Package org.opennms.nephron.util

Class PaneAccumulator<K,V>

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<K,V>>,org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<K,V>>>

org.opennms.nephron.util.PaneAccumulator<K,V>

All Implemented Interfaces:

Serializable, org.apache.beam.sdk.transforms.display.HasDisplayData

public class PaneAccumulator<K,V>
extends org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<K,V>>,org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<K,V>>>

A stateful transform that accumulates values of different panes and flushes accumulated values after a given output delay.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.beam.sdk.transforms.PTransform

name, resourceHints

Constructor Summary

Constructors

Constructor	Description
PaneAccumulator(org.apache.beam.sdk.transforms.SerializableBiFunction<V,V,V> combiner, org.joda.time.Duration accumulationDelay, org.apache.beam.sdk.coders.Coder<K> keyCoder, org.apache.beam.sdk.coders.Coder<V> valueCoder)

Method Summary

Modifier and Type	Method	Description
org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<K,V>>	expand(org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<K,V>> input)

Methods inherited from class org.apache.beam.sdk.transforms.PTransform

compose, compose, getAdditionalInputs, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setResourceHints, toString, validate

Methods inherited from class java.lang.Object

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

Constructor Detail

PaneAccumulator

public PaneAccumulator(org.apache.beam.sdk.transforms.SerializableBiFunction<V,V,V> combiner,
                       org.joda.time.Duration accumulationDelay,
                       org.apache.beam.sdk.coders.Coder<K> keyCoder,
                       org.apache.beam.sdk.coders.Coder<V> valueCoder)

Method Detail

expand

public org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<K,V>> expand(org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<K,V>> input)

Specified by:

expand in class org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<K,V>>,org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<K,V>>>