org.mapdb

Class Volume.MemoryVol

java.lang.Object

org.mapdb.Volume

org.mapdb.Volume.ByteBufferVol

org.mapdb.Volume.MemoryVol

All Implemented Interfaces:

Closeable, AutoCloseable

Enclosing class:

Volume

public static final class Volume.MemoryVol
extends Volume.ByteBufferVol

Nested Class Summary

Nested classes/interfaces inherited from class org.mapdb.Volume

Volume.ByteArrayVol, Volume.ByteBufferVol, Volume.ByteBufferVolSingle, Volume.FileChannelVol, Volume.MappedFileVol, Volume.MappedFileVolSingle, Volume.MemoryVol, Volume.MemoryVolSingle, Volume.RandomAccessFileVol, Volume.ReadOnly, Volume.SingleByteArrayVol, Volume.VolumeFactory

Field Summary

Fields

Modifier and Type	Field and Description
static Volume.VolumeFactory	FACTORY factory for DirectByteBuffer storage
static Volume.VolumeFactory	FACTORY_WITH_CLEANER_HACK factory for DirectByteBuffer storage
protected boolean	useDirectBuffer

Fields inherited from class org.mapdb.Volume.ByteBufferVol

cleanerHackEnabled, growLock, readOnly, slices, sliceShift, sliceSize, sliceSizeModMask

Fields inherited from class org.mapdb.Volume

closed, LOG, UNSAFE_VOL_FACTORY

Constructor Summary

Constructors

Constructor and Description
Volume.MemoryVol(boolean useDirectBuffer, int sliceShift, boolean cleanerHackEnabled, long initSize)

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
void	ensureAvailable(long offset) Check space allocated by Volume is bigger or equal to given offset.
File	getFile() returns underlying file if it exists
boolean	getFileLocked() return true if this Volume holds exclusive lock over its file
long	length()
void	sync()
String	toString()
void	truncate(long size)

Methods inherited from class org.mapdb.Volume.ByteBufferVol

clear, getByte, getData, getDataInput, getDataInputOverlap, getInt, getLong, getPackedLong, getSixLong, getSlice, getUnsignedByte, getUnsignedShort, isSliced, putByte, putData, putData, putDataOverlap, putInt, putLong, putPackedLong, putSixLong, putUnsignedByte, putUnsignedShort, sliceSize, toByte, toByte, transferInto, unmap

Methods inherited from class org.mapdb.Volume

assertZeroes, copyEntireVolumeTo, deleteFile, fileLoad, finalize, getLongPackBidi, getLongPackBidiReverse, hash, isClosed, putLongPackBidi, volumeTransfer

Methods inherited from class java.lang.Object

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

Field Detail

FACTORY

public static final Volume.VolumeFactory FACTORY

factory for DirectByteBuffer storage

FACTORY_WITH_CLEANER_HACK

public static final Volume.VolumeFactory FACTORY_WITH_CLEANER_HACK

factory for DirectByteBuffer storage

useDirectBuffer

protected final boolean useDirectBuffer

Constructor Detail

Volume.MemoryVol

public Volume.MemoryVol(boolean useDirectBuffer,
                int sliceShift,
                boolean cleanerHackEnabled,
                long initSize)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

ensureAvailable

public final void ensureAvailable(long offset)

Description copied from class: Volume

Check space allocated by Volume is bigger or equal to given offset. So it is safe to write into smaller offsets.

Specified by:

ensureAvailable in class Volume

truncate

public void truncate(long size)

Specified by:

truncate in class Volume

close

public void close()

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in class Volume

sync

public void sync()

Specified by:

sync in class Volume

length

public long length()

Specified by:

length in class Volume

getFile

public File getFile()

Description copied from class: Volume

returns underlying file if it exists

Specified by:

getFile in class Volume

getFileLocked

public boolean getFileLocked()

Description copied from class: Volume

return true if this Volume holds exclusive lock over its file

Specified by:

getFileLocked in class Volume