org.apache.arrow.memory

Interface BufferManager

All Superinterfaces:

AutoCloseable

public interface BufferManager
extends AutoCloseable

Manages a list of ArrowBufs that can be reallocated as needed. Upon re-allocation the old buffer will be freed. Managing a list of these buffers prevents some parts of the system from needing to define a correct location to place the final call to free them.

Method Summary

Modifier and Type	Method and Description
void	close()
ArrowBuf	getManagedBuffer() Get a managed buffer of indeterminate size.
ArrowBuf	getManagedBuffer(long size) Get a managed buffer of at least a certain size.
ArrowBuf	replace(ArrowBuf old, long newSize) Replace an old buffer with a new version at least of the provided size.

Method Detail

replace

ArrowBuf replace(ArrowBuf old,
                 long newSize)

Replace an old buffer with a new version at least of the provided size. Does not copy data.

Parameters:

old - Old Buffer that the user is no longer going to use.

newSize - Size of new replacement buffer.

Returns:

A new version of the buffer.

getManagedBuffer

ArrowBuf getManagedBuffer()

Get a managed buffer of indeterminate size.

Returns:

A buffer.

getManagedBuffer

ArrowBuf getManagedBuffer(long size)

Get a managed buffer of at least a certain size.

Parameters:

size - The desired size

Returns:

A buffer

close

void close()

Specified by:

close in interface AutoCloseable