Package org.apache.flink.runtime.state.heap

Interface KeyGroupPartitionedPriorityQueue.PartitionQueueSetFactory<T,PQS extends InternalPriorityQueue<T> & HeapPriorityQueueElement>

Type Parameters:

T - type of the elements in the queue set.

PQS - type of the priority queue. Must have set semantics and HeapPriorityQueueElement.

Enclosing class:

KeyGroupPartitionedPriorityQueue<T,PQ extends InternalPriorityQueue<T> & HeapPriorityQueueElement>

public static interface KeyGroupPartitionedPriorityQueue.PartitionQueueSetFactory<T,PQS extends InternalPriorityQueue<T> & HeapPriorityQueueElement>

Factory that produces the sub-queues that represent the partitions of a KeyGroupPartitionedPriorityQueue.

Method Summary

Modifier and Type	Method	Description
PQS	create(int keyGroupId, int numKeyGroups, KeyExtractorFunction<T> keyExtractorFunction, PriorityComparator<T> elementPriorityComparator)	Creates a new queue for a given key-group partition.

Method Details

create

@Nonnull
PQS create(@Nonnegative
 int keyGroupId,
 @Nonnegative
 int numKeyGroups,
 @Nonnull
 KeyExtractorFunction<T> keyExtractorFunction,
 @Nonnull
 PriorityComparator<T> elementPriorityComparator)

Creates a new queue for a given key-group partition.

Parameters:

keyGroupId - the key-group of the elements managed by the produced queue.

numKeyGroups - the total number of key-groups in the job.

elementPriorityComparator - the comparator that determines the order of managed elements by priority.

Returns:

a new queue for the given key-group.