Package org.apache.hadoop.mapred

Class FadvisedFileRegion

java.lang.Object

io.netty.util.AbstractReferenceCounted

io.netty.channel.DefaultFileRegion

org.apache.hadoop.mapred.FadvisedFileRegion

All Implemented Interfaces:

io.netty.channel.FileRegion, io.netty.util.ReferenceCounted

public class FadvisedFileRegion
extends io.netty.channel.DefaultFileRegion

Constructor Summary

Constructors

Constructor	Description
FadvisedFileRegion(RandomAccessFile file, long position, long count, boolean manageOsCache, int readaheadLength, org.apache.hadoop.io.ReadaheadPool readaheadPool, String identifier, int shuffleBufferSize, boolean shuffleTransferToAllowed)

Method Summary

Modifier and Type	Method	Description
protected void	deallocate()
void	transferSuccessful()	Call when the transfer completes successfully so we can advise the OS that we don't need the region to be cached anymore.
long	transferTo(WritableByteChannel target, long position)

Methods inherited from class io.netty.channel.DefaultFileRegion

count, isOpen, open, position, retain, retain, touch, touch, transfered, transferred

Methods inherited from class io.netty.util.AbstractReferenceCounted

refCnt, release, release, setRefCnt

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.netty.util.ReferenceCounted

refCnt, release, release

Constructor Details

FadvisedFileRegion

public FadvisedFileRegion(RandomAccessFile file,
 long position,
 long count,
 boolean manageOsCache,
 int readaheadLength,
 org.apache.hadoop.io.ReadaheadPool readaheadPool,
 String identifier,
 int shuffleBufferSize,
 boolean shuffleTransferToAllowed)
                   throws IOException

Throws:

IOException

Method Details

transferTo

public long transferTo(WritableByteChannel target,
 long position)
                throws IOException

Specified by:

transferTo in interface io.netty.channel.FileRegion

Overrides:

transferTo in class io.netty.channel.DefaultFileRegion

Throws:

IOException

deallocate

protected void deallocate()

Overrides:

deallocate in class io.netty.channel.DefaultFileRegion

transferSuccessful

public void transferSuccessful()

Call when the transfer completes successfully so we can advise the OS that we don't need the region to be cached anymore.