org.mapdb

Class Volume.FileChannelVol

java.lang.Object

org.mapdb.Volume

org.mapdb.Volume.FileChannelVol

Enclosing class:

Volume

public static final class Volume.FileChannelVol
extends Volume

Volume which uses FileChannel. Uses global lock and does not use mapped memory.

Nested Class Summary

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

Volume.ByteBufferVol, Volume.Factory, Volume.FileChannelVol, Volume.MappedFileVol, Volume.MemoryVol

Field Summary

Fields

Modifier and Type	Field and Description
protected FileChannel	channel
protected int	chunkSize
protected File	file
protected Object	growLock
protected boolean	hasLimit
protected RandomAccessFile	raf
protected boolean	readOnly
protected long	size
protected long	sizeLimit

Constructor Summary

Constructors

Constructor and Description
Volume.FileChannelVol(File file, boolean readOnly, long sizeLimit, int chunkShift, int sizeIncrement)

Method Summary

Methods

Modifier and Type	Method and Description
protected static void	checkFolder(File file, boolean readOnly)
void	close()
void	deleteFile()
byte	getByte(long offset)
DataInput2	getDataInput(long offset, int size)
File	getFile() returns underlying file if it exists
int	getInt(long offset)
long	getLong(long offset)
long	getSixLong(long offset) Reads a long from the indicated position
boolean	isEmpty()
boolean	isSliced()
void	putByte(long offset, byte value)
void	putData(long offset, byte[] src, int srcPos, int srcSize)
void	putData(long offset, ByteBuffer buf)
void	putInt(long offset, int value)
void	putLong(long offset, long value)
void	putSixLong(long offset, long value) Writes a long to the indicated position
protected void	readFully(long offset, ByteBuffer buf)
void	sync()
void	truncate(long size)
boolean	tryAvailable(long offset)
protected void	writeFully(long offset, ByteBuffer buf)

Methods inherited from class org.mapdb.Volume

ensureAvailable, fileFactory, fileFactory, getPackedLong, getUnsignedByte, getUnsignedShort, memoryFactory, putPackedLong, putUnsignedByte, putUnsignedShort, volumeForFile, volumeTransfer

Methods inherited from class java.lang.Object

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

Field Detail

file

protected final File file

chunkSize

protected final int chunkSize

raf

protected RandomAccessFile raf

channel

protected FileChannel channel

readOnly

protected final boolean readOnly

sizeLimit

protected final long sizeLimit

hasLimit

protected final boolean hasLimit

size

protected volatile long size

growLock

protected final Object growLock

Constructor Detail

Volume.FileChannelVol

public Volume.FileChannelVol(File file,
                     boolean readOnly,
                     long sizeLimit,
                     int chunkShift,
                     int sizeIncrement)

Method Detail

checkFolder

protected static void checkFolder(File file,
               boolean readOnly)
                           throws IOException

Throws:

IOException

tryAvailable

public boolean tryAvailable(long offset)

Specified by:

tryAvailable in class Volume

truncate

public void truncate(long size)

Specified by:

truncate in class Volume

writeFully

protected void writeFully(long offset,
              ByteBuffer buf)
                   throws IOException

Throws:

IOException

putSixLong

public final void putSixLong(long offset,
              long value)

Description copied from class: Volume

Writes a long to the indicated position

Overrides:

putSixLong in class Volume

putLong

public void putLong(long offset,
           long value)

Specified by:

putLong in class Volume

putInt

public void putInt(long offset,
          int value)

Specified by:

putInt in class Volume

putByte

public void putByte(long offset,
           byte value)

Specified by:

putByte in class Volume

putData

public void putData(long offset,
           byte[] src,
           int srcPos,
           int srcSize)

Specified by:

putData in class Volume

putData

public void putData(long offset,
           ByteBuffer buf)

Specified by:

putData in class Volume

readFully

protected void readFully(long offset,
             ByteBuffer buf)
                  throws IOException

Throws:

IOException

getSixLong

public final long getSixLong(long offset)

Description copied from class: Volume

Reads a long from the indicated position

Overrides:

getSixLong in class Volume

getLong

public long getLong(long offset)

Specified by:

getLong in class Volume

getInt

public int getInt(long offset)

Specified by:

getInt in class Volume

getByte

public byte getByte(long offset)

Specified by:

getByte in class Volume

getDataInput

public DataInput2 getDataInput(long offset,
                      int size)

Specified by:

getDataInput in class Volume

close

public void close()

Specified by:

close in class Volume

sync

public void sync()

Specified by:

sync in class Volume

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in class Volume

deleteFile

public void deleteFile()

Specified by:

deleteFile in class Volume

isSliced

public boolean isSliced()

Specified by:

isSliced in class Volume

getFile

public File getFile()

Description copied from class: Volume

returns underlying file if it exists

Specified by:

getFile in class Volume