Package org.apache.flink.runtime.io.network.partition.hybrid

Class HsFileDataIndexImpl.HsFileDataIndexRegionHelper

java.lang.Object

org.apache.flink.runtime.io.network.partition.hybrid.HsFileDataIndexImpl.HsFileDataIndexRegionHelper

All Implemented Interfaces:

FileDataIndexRegionHelper<HsFileDataIndexImpl.InternalRegion>

Enclosing class:

HsFileDataIndexImpl

public static class HsFileDataIndexImpl.HsFileDataIndexRegionHelper
extends Object
implements FileDataIndexRegionHelper<HsFileDataIndexImpl.InternalRegion>

The implementation of FileDataIndexRegionHelper to writing a region to the file or reading a region from the file.

Note that this type of region's length may be variable because it contains an array to indicate each buffer's release state.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.runtime.io.network.partition.hybrid.index.FileDataIndexRegionHelper

FileDataIndexRegionHelper.Region

Field Summary

Fields

Modifier and Type	Field	Description
static HsFileDataIndexImpl.HsFileDataIndexRegionHelper	INSTANCE

Method Summary

Modifier and Type	Method	Description
HsFileDataIndexImpl.InternalRegion	readRegionFromFile(FileChannel channel, long fileOffset)	Read a region from the file.
void	writeRegionToFile(FileChannel channel, HsFileDataIndexImpl.InternalRegion region)	Write the region to the file.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final HsFileDataIndexImpl.HsFileDataIndexRegionHelper INSTANCE

Method Detail

writeRegionToFile

public void writeRegionToFile(FileChannel channel,
                              HsFileDataIndexImpl.InternalRegion region)
                       throws IOException

Description copied from interface: FileDataIndexRegionHelper

Write the region to the file.

Specified by:

writeRegionToFile in interface FileDataIndexRegionHelper<HsFileDataIndexImpl.InternalRegion>

Parameters:

channel - the file channel to write the region

region - the region to be written to the file

Throws:

IOException

readRegionFromFile

public HsFileDataIndexImpl.InternalRegion readRegionFromFile(FileChannel channel,
                                                             long fileOffset)
                                                      throws IOException

Description copied from interface: FileDataIndexRegionHelper

Read a region from the file.

Specified by:

readRegionFromFile in interface FileDataIndexRegionHelper<HsFileDataIndexImpl.InternalRegion>

Parameters:

channel - the file channel to read the region

fileOffset - the current region data is from this file offset, so start reading the file from the offset when reading the region

Returns:

the region read from the file

Throws:

IOException