org.apache.flink.runtime.state.heap

Class CopyOnWriteStateTableSnapshot.StateTableKeyGroupPartitioner<K,N,S>

java.lang.Object

org.apache.flink.runtime.state.KeyGroupPartitioner<CopyOnWriteStateTable.StateTableEntry<K,N,S>>

org.apache.flink.runtime.state.heap.CopyOnWriteStateTableSnapshot.StateTableKeyGroupPartitioner<K,N,S>

Type Parameters:

K - type of key.

N - type of namespace.

S - type of state value.

Direct Known Subclasses:

CopyOnWriteStateTableSnapshot.TransformingStateTableKeyGroupPartitioner

Enclosing class:

CopyOnWriteStateTableSnapshot<K,N,S>

@VisibleForTesting
protected static class CopyOnWriteStateTableSnapshot.StateTableKeyGroupPartitioner<K,N,S>
extends KeyGroupPartitioner<CopyOnWriteStateTable.StateTableEntry<K,N,S>>

This class is the implementation of KeyGroupPartitioner for CopyOnWriteStateTable. This class swaps input and output in reportAllElementKeyGroups() for performance reasons, so that we can reuse the non-flattened original snapshot array as partitioning output.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.runtime.state.KeyGroupPartitioner

KeyGroupPartitioner.ElementReaderFunction<T>, KeyGroupPartitioner.ElementWriterFunction<T>, KeyGroupPartitioner.KeyGroupElementsConsumer<T>

Field Summary

Fields inherited from class org.apache.flink.runtime.state.KeyGroupPartitioner

computedResult, counterHistogram, elementKeyGroups, elementWriterFunction, firstKeyGroup, keyExtractorFunction, keyGroupRange, numberOfElements, partitioningDestination, partitioningSource, totalKeyGroups

Method Summary

Modifier and Type	Method and Description
protected void	reportAllElementKeyGroups() This method iterates over the input data and reports the key-group for each element.

Methods inherited from class org.apache.flink.runtime.state.KeyGroupPartitioner

createKeyGroupPartitionReader, partitionByKeyGroup, reportKeyGroupOfElementAtIndex

Methods inherited from class java.lang.Object

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

Method Detail

reportAllElementKeyGroups

protected void reportAllElementKeyGroups()

Description copied from class: KeyGroupPartitioner

This method iterates over the input data and reports the key-group for each element.

Overrides:

reportAllElementKeyGroups in class KeyGroupPartitioner<CopyOnWriteStateTable.StateTableEntry<K,N,S>>