Package org.apache.drill.exec.ops

Class BufferManagerImpl

java.lang.Object

org.apache.drill.exec.ops.BufferManagerImpl

All Implemented Interfaces:

AutoCloseable, BufferManager

public class BufferManagerImpl
extends Object
implements BufferManager

Constructor Summary

Constructors

Constructor	Description
BufferManagerImpl(BufferAllocator allocator)

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Details

BufferManagerImpl

public BufferManagerImpl(BufferAllocator allocator)

Method Details

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface BufferManager

getAllocator

public BufferAllocator getAllocator()

Specified by:

getAllocator in interface BufferManager

replace

public DrillBuf replace(DrillBuf old,
 int newSize)

Description copied from interface: BufferManager

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

Specified by:

replace in interface BufferManager

Parameters:

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

newSize - Size of new replacement buffer.

Returns:

getManagedBuffer

public DrillBuf getManagedBuffer()

Description copied from interface: BufferManager

Get a managed buffer of indeterminate size.

Specified by:

getManagedBuffer in interface BufferManager

Returns:

A buffer.

getManagedBuffer

public DrillBuf getManagedBuffer(int size)

Description copied from interface: BufferManager

Get a managed buffer of at least a certain size.

Specified by:

getManagedBuffer in interface BufferManager

Parameters:

size - The desired size

Returns:

A buffer