org.apache.flink.core.memory

Class HeapMemorySegment.HeapMemorySegmentFactory

java.lang.Object

org.apache.flink.core.memory.HeapMemorySegment.HeapMemorySegmentFactory

All Implemented Interfaces:

MemorySegmentFactory.Factory

Enclosing class:

HeapMemorySegment

public static final class HeapMemorySegment.HeapMemorySegmentFactory
extends Object
implements MemorySegmentFactory.Factory

A memory segment factory that produces heap memory segments. Note that this factory does not support to allocate off-heap memory.

Method Summary

Modifier and Type	Method and Description
HeapMemorySegment	allocateUnpooledSegment(int size, Object owner) Allocates some unpooled memory and creates a new memory segment that represents that memory.
HeapMemorySegment	wrap(byte[] memory) Creates a new memory segment that targets the given heap memory region.
HeapMemorySegment	wrapPooledHeapMemory(byte[] memory, Object owner) Creates a memory segment that wraps the given byte array.
HeapMemorySegment	wrapPooledOffHeapMemory(ByteBuffer memory, Object owner) Creates a memory segment that wraps the off-heap memory backing the given ByteBuffer.

Methods inherited from class java.lang.Object

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

Method Detail

wrap

public HeapMemorySegment wrap(byte[] memory)

Description copied from interface: MemorySegmentFactory.Factory

Creates a new memory segment that targets the given heap memory region.

Specified by:

wrap in interface MemorySegmentFactory.Factory

Parameters:

memory - The heap memory region.

Returns:

A new memory segment that targets the given heap memory region.

allocateUnpooledSegment

public HeapMemorySegment allocateUnpooledSegment(int size,
                                                 Object owner)

Description copied from interface: MemorySegmentFactory.Factory

Allocates some unpooled memory and creates a new memory segment that represents that memory.

Specified by:

allocateUnpooledSegment in interface MemorySegmentFactory.Factory

Parameters:

size - The size of the memory segment to allocate.

owner - The owner to associate with the memory segment.

Returns:

A new memory segment, backed by unpooled heap memory.

wrapPooledHeapMemory

public HeapMemorySegment wrapPooledHeapMemory(byte[] memory,
                                              Object owner)

Description copied from interface: MemorySegmentFactory.Factory

Creates a memory segment that wraps the given byte array.

This method is intended to be used for components which pool memory and create memory segments around long-lived memory regions.

Specified by:

wrapPooledHeapMemory in interface MemorySegmentFactory.Factory

Parameters:

memory - The heap memory to be represented by the memory segment.

owner - The owner to associate with the memory segment.

Returns:

A new memory segment representing the given heap memory.

wrapPooledOffHeapMemory

public HeapMemorySegment wrapPooledOffHeapMemory(ByteBuffer memory,
                                                 Object owner)

Description copied from interface: MemorySegmentFactory.Factory

Creates a memory segment that wraps the off-heap memory backing the given ByteBuffer. Note that the ByteBuffer needs to be a direct ByteBuffer.

This method is intended to be used for components which pool memory and create memory segments around long-lived memory regions.

Specified by:

wrapPooledOffHeapMemory in interface MemorySegmentFactory.Factory

Parameters:

memory - The byte buffer with the off-heap memory to be represented by the memory segment.

owner - The owner to associate with the memory segment.

Returns:

A new memory segment representing the given off-heap memory.