org.neo4j.kernel.impl.util
Class BufferedFileChannel

java.lang.Object
  java.nio.channels.spi.AbstractInterruptibleChannel
      java.nio.channels.FileChannel
          org.neo4j.kernel.impl.util.BufferedFileChannel

All Implemented Interfaces:

Closeable, ByteChannel, Channel, GatheringByteChannel, InterruptibleChannel, ReadableByteChannel, ScatteringByteChannel, WritableByteChannel

public class BufferedFileChannel
extends FileChannel

Puts a buffer in front of a ReadableByteChannel so that even small reads, byte/int/long will be fast.

Nested Class Summary

Nested classes/interfaces inherited from class java.nio.channels.FileChannel

FileChannel.MapMode

Constructor Summary

BufferedFileChannel(FileChannel source)

Method Summary

void	force(boolean metaData)
FileChannel	getSource()
protected void	implCloseChannel()
FileLock	lock(long position, long size, boolean shared)
MappedByteBuffer	map(FileChannel.MapMode mode, long position, long size)
long	position()
FileChannel	position(long newPosition)
int	read(ByteBuffer dst)
long	read(ByteBuffer[] dsts, int offset, int length)
int	read(ByteBuffer dst, long position)
long	size()
long	transferFrom(ReadableByteChannel src, long position, long count)
long	transferTo(long position, long count, WritableByteChannel target)
FileChannel	truncate(long size)
FileLock	tryLock(long position, long size, boolean shared)
int	write(ByteBuffer src)
long	write(ByteBuffer[] srcs, int offset, int length)
int	write(ByteBuffer src, long position)

Methods inherited from class java.nio.channels.FileChannel

lock, read, tryLock, write

Methods inherited from class java.nio.channels.spi.AbstractInterruptibleChannel

begin, close, end, isOpen

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.nio.channels.Channel

close, isOpen

Constructor Detail

BufferedFileChannel

public BufferedFileChannel(FileChannel source)
                    throws IOException

Throws:

IOException

Method Detail

read

public int read(ByteBuffer dst)
         throws IOException

Specified by:

read in interface ReadableByteChannel

Specified by:

read in class FileChannel

Throws:

IOException

read

public long read(ByteBuffer[] dsts,
                 int offset,
                 int length)
          throws IOException

Specified by:

read in interface ScatteringByteChannel

Specified by:

read in class FileChannel

Throws:

IOException

write

public int write(ByteBuffer src)
          throws IOException

Specified by:

write in interface WritableByteChannel

Specified by:

write in class FileChannel

Throws:

IOException

write

public long write(ByteBuffer[] srcs,
                  int offset,
                  int length)
           throws IOException

Specified by:

write in interface GatheringByteChannel

Specified by:

write in class FileChannel

Throws:

IOException

position

public long position()
              throws IOException

Specified by:

position in class FileChannel

Throws:

IOException

position

public FileChannel position(long newPosition)
                     throws IOException

Specified by:

position in class FileChannel

Throws:

IOException

size

public long size()
          throws IOException

Specified by:

size in class FileChannel

Throws:

IOException

truncate

public FileChannel truncate(long size)
                     throws IOException

Specified by:

truncate in class FileChannel

Throws:

IOException

force

public void force(boolean metaData)
           throws IOException

Specified by:

force in class FileChannel

Throws:

IOException

transferTo

public long transferTo(long position,
                       long count,
                       WritableByteChannel target)
                throws IOException

Specified by:

transferTo in class FileChannel

Throws:

IOException

transferFrom

public long transferFrom(ReadableByteChannel src,
                         long position,
                         long count)
                  throws IOException

Specified by:

transferFrom in class FileChannel

Throws:

IOException

read

public int read(ByteBuffer dst,
                long position)
         throws IOException

Specified by:

read in class FileChannel

Throws:

IOException

write

public int write(ByteBuffer src,
                 long position)
          throws IOException

Specified by:

write in class FileChannel

Throws:

IOException

map

public MappedByteBuffer map(FileChannel.MapMode mode,
                            long position,
                            long size)
                     throws IOException

Specified by:

map in class FileChannel

Throws:

IOException

lock

public FileLock lock(long position,
                     long size,
                     boolean shared)
              throws IOException

Specified by:

lock in class FileChannel

Throws:

IOException

tryLock

public FileLock tryLock(long position,
                        long size,
                        boolean shared)
                 throws IOException

Specified by:

tryLock in class FileChannel

Throws:

IOException

implCloseChannel

protected void implCloseChannel()
                         throws IOException

Specified by:

implCloseChannel in class AbstractInterruptibleChannel

Throws:

IOException

getSource

public FileChannel getSource()