org.apache.flink.table.runtime.operators.aggregate

Class BytesHashMapSpillMemorySegmentPool

java.lang.Object

org.apache.flink.table.runtime.operators.aggregate.BytesHashMapSpillMemorySegmentPool

All Implemented Interfaces:

MemorySegmentSource, MemorySegmentPool

public class BytesHashMapSpillMemorySegmentPool
extends Object
implements MemorySegmentPool

MemorySegmentPool for BytesHashMap to fall back to sort agg. nextSegment() not remove segment from segments, just get from segments.

Constructor Summary

Constructors

Constructor and Description
BytesHashMapSpillMemorySegmentPool(List<MemorySegment> memorySegments)

Method Summary

Modifier and Type	Method and Description
int	freePages()
MemorySegment	nextSegment() Gets the next memory segment.
int	pageSize() Get the page size of each page this pool holds.
void	returnAll(List<MemorySegment> memory) Return all pages back into this pool.

Methods inherited from class java.lang.Object

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

Constructor Detail

BytesHashMapSpillMemorySegmentPool

public BytesHashMapSpillMemorySegmentPool(List<MemorySegment> memorySegments)

Method Detail

nextSegment

public MemorySegment nextSegment()

Description copied from interface: MemorySegmentSource

Gets the next memory segment. If no more segments are available, it returns null.

Specified by:

nextSegment in interface MemorySegmentSource

Returns:

The next memory segment, or null, if none is available.

returnAll

public void returnAll(List<MemorySegment> memory)

Description copied from interface: MemorySegmentPool

Return all pages back into this pool.

Specified by:

returnAll in interface MemorySegmentPool

Parameters:

memory - the pages which want to be returned.

freePages

public int freePages()

Specified by:

freePages in interface MemorySegmentPool

Returns:

Free page number.

pageSize

public int pageSize()

Description copied from interface: MemorySegmentPool

Get the page size of each page this pool holds.

Specified by:

pageSize in interface MemorySegmentPool

Returns:

the page size