org.mapdb.volume

Class ByteBufferMemoryVol

java.lang.Object

org.mapdb.volume.Volume

org.mapdb.volume.ByteBufferVol

org.mapdb.volume.ByteBufferMemoryVol

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public final class ByteBufferMemoryVol
extends ByteBufferVol

Created by jan on 3/13/16.

Field Summary

Fields

Modifier and Type	Field and Description
static VolumeFactory	FACTORY factory for DirectByteBuffer storage
static 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.Volume

closed, LOG, UNSAFE_VOL_FACTORY

Constructor Summary

Constructors

Constructor and Description
ByteBufferMemoryVol(boolean useDirectBuffer, int sliceShift, boolean cleanerHackEnabled, long initSize)

Method Summary

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

Methods inherited from class org.mapdb.volume.ByteBufferVol

clear, copyTo, 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, unmap

Methods inherited from class org.mapdb.volume.Volume

assertZeroes, clearOverlap, copyFrom, copyTo, copyTo, deleteFile, fileLoad, finalize, hash, isClosed

Methods inherited from class java.lang.Object

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

Field Detail

FACTORY

public static final VolumeFactory FACTORY

factory for DirectByteBuffer storage

FACTORY_WITH_CLEANER_HACK

public static final VolumeFactory FACTORY_WITH_CLEANER_HACK

factory for DirectByteBuffer storage

useDirectBuffer

protected final boolean useDirectBuffer

Constructor Detail

ByteBufferMemoryVol

public ByteBufferMemoryVol(boolean useDirectBuffer,
                           int sliceShift,
                           boolean cleanerHackEnabled,
                           long initSize)

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.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 java.io.Closeable

Specified by:

close in interface java.lang.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

isReadOnly

public boolean isReadOnly()

Specified by:

isReadOnly in class Volume

getFile

public java.io.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