Package org.h2.mvstore.cache

Class FilePathCache.FileCache

java.lang.Object

java.nio.channels.spi.AbstractInterruptibleChannel

java.nio.channels.FileChannel

org.h2.store.fs.FileBase

org.h2.mvstore.cache.FilePathCache.FileCache

All Implemented Interfaces:

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

Enclosing class:

FilePathCache

public static class FilePathCache.FileCache
extends FileBase

A file with a read cache.

Nested Class Summary

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

FileChannel.MapMode

Field Summary

Fields

Modifier and Type	Field	Description
private final FileChannel	base
private final CacheLongKeyLIRS<ByteBuffer>	cache
private static final int	CACHE_BLOCK_SIZE

Constructor Summary

Constructors

Constructor	Description
FileCache(FileChannel base)

Method Summary

Modifier and Type	Method	Description
private void	clearCache(ByteBuffer src, long position)
void	force(boolean metaData)
private static long	getCachePos(long pos)
protected void	implCloseChannel()
long	position()
FileChannel	position(long newPosition)
int	read(ByteBuffer dst)
int	read(ByteBuffer dst, long position)
long	size()
String	toString()
FileChannel	truncate(long newSize)
FileLock	tryLock(long position, long size, boolean shared)
int	write(ByteBuffer src)
int	write(ByteBuffer src, long position)

Methods inherited from class org.h2.store.fs.FileBase

lock, map, read, transferFrom, transferTo, write

Methods inherited from class java.nio.channels.FileChannel

lock, map, open, open, 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, wait, wait, wait

Methods inherited from interface java.nio.channels.Channel

isOpen

Field Details

CACHE_BLOCK_SIZE

private static final int CACHE_BLOCK_SIZE

See Also:

• Constant Field Values

base

private final FileChannel base

cache

private final CacheLongKeyLIRS<ByteBuffer> cache

Constructor Details

FileCache

FileCache(FileChannel base)

Method Details

implCloseChannel

protected void implCloseChannel()
                         throws IOException

Overrides:

implCloseChannel in class FileBase

Throws:

IOException

position

public FileChannel position(long newPosition)
                     throws IOException

Specified by:

position in interface SeekableByteChannel

Specified by:

position in class FileChannel

Throws:

IOException

position

public long position()
              throws IOException

Specified by:

position in interface SeekableByteChannel

Specified by:

position in class FileChannel

Throws:

IOException

read

public int read(ByteBuffer dst)
         throws IOException

Specified by:

read in interface ReadableByteChannel

Specified by:

read in interface SeekableByteChannel

Specified by:

read in class FileChannel

Throws:

IOException

read

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

Overrides:

read in class FileBase

Throws:

IOException

getCachePos

private static long getCachePos(long pos)

size

public long size()
          throws IOException

Specified by:

size in interface SeekableByteChannel

Specified by:

size in class FileChannel

Throws:

IOException

truncate

public FileChannel truncate(long newSize)
                     throws IOException

Specified by:

truncate in interface SeekableByteChannel

Specified by:

truncate in class FileChannel

Throws:

IOException

write

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

Overrides:

write in class FileBase

Throws:

IOException

write

public int write(ByteBuffer src)
          throws IOException

Specified by:

write in interface SeekableByteChannel

Specified by:

write in interface WritableByteChannel

Specified by:

write in class FileChannel

Throws:

IOException

clearCache

private void clearCache(ByteBuffer src,
 long position)

force

public void force(boolean metaData)
           throws IOException

Overrides:

force in class FileBase

Throws:

IOException

tryLock

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

Overrides:

tryLock in class FileBase

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object