org.opennms.nephron

Class Pipeline.CalculateTopKGroups

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<org.opennms.netmgt.flows.persistence.model.FlowDocument>,org.apache.beam.sdk.values.PCollection<FlowSummary>>

org.opennms.nephron.Pipeline.CalculateTopKGroups

All Implemented Interfaces:

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

Enclosing class:

Pipeline

public static class Pipeline.CalculateTopKGroups
extends org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<org.opennms.netmgt.flows.persistence.model.FlowDocument>,org.apache.beam.sdk.values.PCollection<FlowSummary>>

Used to calculate the top K groups using the given grouping function. Assumes that the input stream is windowed.

See Also:

Serialized Form

Field Summary

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

name

Constructor Summary

Constructors

Constructor and Description
CalculateTopKGroups(String transformPrefix, int topK, org.apache.beam.sdk.transforms.DoFn<org.opennms.netmgt.flows.persistence.model.FlowDocument,org.apache.beam.sdk.values.KV<Groupings.CompoundKey,org.opennms.netmgt.flows.persistence.model.FlowDocument>> groupingBy)

Method Summary

Modifier and Type	Method and Description
org.apache.beam.sdk.values.PCollection<FlowSummary>	expand(org.apache.beam.sdk.values.PCollection<org.opennms.netmgt.flows.persistence.model.FlowDocument> input)

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

CalculateTopKGroups

public CalculateTopKGroups(String transformPrefix,
                           int topK,
                           org.apache.beam.sdk.transforms.DoFn<org.opennms.netmgt.flows.persistence.model.FlowDocument,org.apache.beam.sdk.values.KV<Groupings.CompoundKey,org.opennms.netmgt.flows.persistence.model.FlowDocument>> groupingBy)

Method Detail

expand

public org.apache.beam.sdk.values.PCollection<FlowSummary> expand(org.apache.beam.sdk.values.PCollection<org.opennms.netmgt.flows.persistence.model.FlowDocument> input)

Specified by:

expand in class org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<org.opennms.netmgt.flows.persistence.model.FlowDocument>,org.apache.beam.sdk.values.PCollection<FlowSummary>>