Module org.apache.lucene.core

Package org.apache.lucene.store

Class MappedByteBufferIndexInputProvider

java.lang.Object

org.apache.lucene.store.MappedByteBufferIndexInputProvider

All Implemented Interfaces:

MMapDirectory.MMapIndexInputProvider

final class MappedByteBufferIndexInputProvider
extends Object
implements MMapDirectory.MMapIndexInputProvider

Field Summary

Fields

Modifier and Type	Field	Description
private final ByteBufferGuard.BufferCleaner	cleaner
private static final Logger	LOG
private final String	unmapNotSupportedReason
private final boolean	unmapSupported

Constructor Summary

Constructors

Constructor	Description
MappedByteBufferIndexInputProvider()

Method Summary

Modifier and Type	Method	Description
private static boolean	checkUnmapHackSysprop()
long	getDefaultMaxChunkSize()
String	getUnmapNotSupportedReason()
boolean	isUnmapSupported()
(package private) final ByteBuffer[]	map(String resourceDescription, FileChannel fc, int chunkSizePower, boolean preload, long length)	Maps a file into a set of buffers
private static ByteBufferGuard.BufferCleaner	newBufferCleaner(MethodHandle unmapper)
IndexInput	openInput(Path path, IOContext context, int chunkSizePower, boolean preload)
boolean	supportsMadvise()
private static Object	unmapHackImpl()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lucene.store.MMapDirectory.MMapIndexInputProvider

convertMapFailedIOException

Field Details

LOG

private static final Logger LOG

cleaner

private final ByteBufferGuard.BufferCleaner cleaner

unmapSupported

private final boolean unmapSupported

unmapNotSupportedReason

private final String unmapNotSupportedReason

Constructor Details

MappedByteBufferIndexInputProvider

public MappedByteBufferIndexInputProvider()

Method Details

openInput

public IndexInput openInput(Path path,
 IOContext context,
 int chunkSizePower,
 boolean preload)
                     throws IOException

Specified by:

openInput in interface MMapDirectory.MMapIndexInputProvider

Throws:

IOException

getDefaultMaxChunkSize

public long getDefaultMaxChunkSize()

Specified by:

getDefaultMaxChunkSize in interface MMapDirectory.MMapIndexInputProvider

isUnmapSupported

public boolean isUnmapSupported()

Specified by:

isUnmapSupported in interface MMapDirectory.MMapIndexInputProvider

getUnmapNotSupportedReason

public String getUnmapNotSupportedReason()

Specified by:

getUnmapNotSupportedReason in interface MMapDirectory.MMapIndexInputProvider

supportsMadvise

public boolean supportsMadvise()

Specified by:

supportsMadvise in interface MMapDirectory.MMapIndexInputProvider

map

final ByteBuffer[] map(String resourceDescription,
 FileChannel fc,
 int chunkSizePower,
 boolean preload,
 long length)
                throws IOException

Maps a file into a set of buffers

Throws:

IOException

checkUnmapHackSysprop

private static boolean checkUnmapHackSysprop()

unmapHackImpl

private static Object unmapHackImpl()

newBufferCleaner

private static ByteBufferGuard.BufferCleaner newBufferCleaner(MethodHandle unmapper)