Package org.apache.cassandra.io.util

Class MmappedRegions.Region

java.lang.Object

org.apache.cassandra.io.util.MmappedRegions.Region

All Implemented Interfaces:

Rebufferer.BufferHolder

Enclosing class:

MmappedRegions

public static final class MmappedRegions.Region
extends java.lang.Object
implements Rebufferer.BufferHolder

Field Summary

Fields

Modifier and Type	Field	Description
java.nio.ByteBuffer	buffer
long	offset

Constructor Summary

Constructors

Constructor	Description
Region(long offset, java.nio.ByteBuffer buffer)

Method Summary

Modifier and Type	Method	Description
java.nio.ByteBuffer	buffer()	Returns a useable buffer (i.e.
long	end()
java.nio.FloatBuffer	floatBuffer()
java.nio.IntBuffer	intBuffer()
long	offset()	Position in the file of the start of the buffer.
void	release()	To be called when this buffer is no longer in use.

Methods inherited from class java.lang.Object

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

Field Detail

offset

public final long offset

buffer

public final java.nio.ByteBuffer buffer

Constructor Detail

Region

public Region(long offset,
              java.nio.ByteBuffer buffer)

Method Detail

buffer

public java.nio.ByteBuffer buffer()

Description copied from interface: Rebufferer.BufferHolder

Returns a useable buffer (i.e. one whose position and limit can be freely modified). Its limit will be set to the size of the available data in the buffer. The buffer must be treated as read-only.

Specified by:

buffer in interface Rebufferer.BufferHolder

floatBuffer

public java.nio.FloatBuffer floatBuffer()

Specified by:

floatBuffer in interface Rebufferer.BufferHolder

intBuffer

public java.nio.IntBuffer intBuffer()

Specified by:

intBuffer in interface Rebufferer.BufferHolder

offset

public long offset()

Description copied from interface: Rebufferer.BufferHolder

Position in the file of the start of the buffer.

Specified by:

offset in interface Rebufferer.BufferHolder

end

public long end()

release

public void release()

Description copied from interface: Rebufferer.BufferHolder

To be called when this buffer is no longer in use. Must be called for all BufferHolders, or ChunkCache will not be able to free blocks.

Specified by:

release in interface Rebufferer.BufferHolder