org.apache.beam.runners.gearpump.translators

Class GroupByKeyTranslator.Merge<K,V>

java.lang.Object

org.apache.gearpump.streaming.dsl.scalaapi.functions.SerializableFunction

org.apache.gearpump.streaming.dsl.api.functions.FoldFunction<KV<org.joda.time.Instant,WindowedValue<KV<K,V>>>,KV<org.joda.time.Instant,WindowedValue<KV<K,List<V>>>>>

org.apache.beam.runners.gearpump.translators.GroupByKeyTranslator.Merge<K,V>

All Implemented Interfaces:

Serializable

Enclosing class:

GroupByKeyTranslator<K,V>

protected static class GroupByKeyTranslator.Merge<K,V>
extends org.apache.gearpump.streaming.dsl.api.functions.FoldFunction<KV<org.joda.time.Instant,WindowedValue<KV<K,V>>>,KV<org.joda.time.Instant,WindowedValue<KV<K,List<V>>>>>

A transform used internally by Gearpump which encapsulates the merge logic.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
KV<org.joda.time.Instant,WindowedValue<KV<K,List<V>>>>	fold(KV<org.joda.time.Instant,WindowedValue<KV<K,List<V>>>> accum, KV<org.joda.time.Instant,WindowedValue<KV<K,V>>> iter)
KV<org.joda.time.Instant,WindowedValue<KV<K,List<V>>>>	init()

Methods inherited from class org.apache.gearpump.streaming.dsl.scalaapi.functions.SerializableFunction

setup, teardown

Methods inherited from class java.lang.Object

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

Method Detail

init

public KV<org.joda.time.Instant,WindowedValue<KV<K,List<V>>>> init()

Specified by:

init in class org.apache.gearpump.streaming.dsl.api.functions.FoldFunction<KV<org.joda.time.Instant,WindowedValue<KV<K,V>>>,KV<org.joda.time.Instant,WindowedValue<KV<K,List<V>>>>>

fold

public KV<org.joda.time.Instant,WindowedValue<KV<K,List<V>>>> fold(KV<org.joda.time.Instant,WindowedValue<KV<K,List<V>>>> accum,
                                                                   KV<org.joda.time.Instant,WindowedValue<KV<K,V>>> iter)

Specified by:

fold in class org.apache.gearpump.streaming.dsl.api.functions.FoldFunction<KV<org.joda.time.Instant,WindowedValue<KV<K,V>>>,KV<org.joda.time.Instant,WindowedValue<KV<K,List<V>>>>>