org.apache.beam.fn.harness

Class PrecombineGroupingTable.ValueCombiner<K,InputT,AccumT,OutputT>

java.lang.Object

org.apache.beam.fn.harness.PrecombineGroupingTable.ValueCombiner<K,InputT,AccumT,OutputT>

All Implemented Interfaces:

PrecombineGroupingTable.Combiner<org.apache.beam.sdk.util.WindowedValue<K>,InputT,AccumT,OutputT>

Enclosing class:

PrecombineGroupingTable<K,InputT,AccumT>

public static class PrecombineGroupingTable.ValueCombiner<K,InputT,AccumT,OutputT>
extends java.lang.Object
implements PrecombineGroupingTable.Combiner<org.apache.beam.sdk.util.WindowedValue<K>,InputT,AccumT,OutputT>

Implements Precombine Combiner via Combine.KeyedCombineFn.

Method Summary

Modifier and Type	Method and Description
AccumT	add(org.apache.beam.sdk.util.WindowedValue<K> windowedKey, AccumT accumulator, InputT value)
AccumT	compact(org.apache.beam.sdk.util.WindowedValue<K> windowedKey, AccumT accumulator)
AccumT	createAccumulator(org.apache.beam.sdk.util.WindowedValue<K> windowedKey)
OutputT	extract(org.apache.beam.sdk.util.WindowedValue<K> windowedKey, AccumT accumulator)
AccumT	merge(org.apache.beam.sdk.util.WindowedValue<K> windowedKey, java.lang.Iterable<AccumT> accumulators)

Methods inherited from class java.lang.Object

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

Method Detail

createAccumulator

public AccumT createAccumulator(org.apache.beam.sdk.util.WindowedValue<K> windowedKey)

Specified by:

createAccumulator in interface PrecombineGroupingTable.Combiner<org.apache.beam.sdk.util.WindowedValue<K>,InputT,AccumT,OutputT>

add

public AccumT add(org.apache.beam.sdk.util.WindowedValue<K> windowedKey,
                  AccumT accumulator,
                  InputT value)

Specified by:

add in interface PrecombineGroupingTable.Combiner<org.apache.beam.sdk.util.WindowedValue<K>,InputT,AccumT,OutputT>

merge

public AccumT merge(org.apache.beam.sdk.util.WindowedValue<K> windowedKey,
                    java.lang.Iterable<AccumT> accumulators)

Specified by:

merge in interface PrecombineGroupingTable.Combiner<org.apache.beam.sdk.util.WindowedValue<K>,InputT,AccumT,OutputT>

compact

public AccumT compact(org.apache.beam.sdk.util.WindowedValue<K> windowedKey,
                      AccumT accumulator)

Specified by:

compact in interface PrecombineGroupingTable.Combiner<org.apache.beam.sdk.util.WindowedValue<K>,InputT,AccumT,OutputT>

extract

public OutputT extract(org.apache.beam.sdk.util.WindowedValue<K> windowedKey,
                       AccumT accumulator)

Specified by:

extract in interface PrecombineGroupingTable.Combiner<org.apache.beam.sdk.util.WindowedValue<K>,InputT,AccumT,OutputT>