@Override
public ByteBuffer readPage(File file, long position, ByteBuffer pageBuffer)
throws IOException, InterruptedException {
long start = System.currentTimeMillis();
RandomAccessFile randomAccessFile = randomAccessFile(file);
try {
randomAccessFile.seek(position);
randomAccessFile.readFully(pageBuffer.array(), pageBuffer.arrayOffset(), pageSizeBytes);
if (Thread.interrupted()) {
throw new InterruptedException();
}
long stop = System.currentTimeMillis();
if (LOG.isLoggable(Level.FINE)) {
LOG.log(
Level.FINE,
"Read page at {0} of {1}: {2} msec",
new Object[] {position, file, stop - start});
}
} catch (EOFException e) {
LOG.log(
Level.SEVERE,
"Caught EOFException while reading {0}, position {1}",
new Object[] {file, position});
LOG.log(Level.SEVERE, "stack", e);
throw e;
} finally {
randomAccessFile.close();
}
return pageBuffer;
}
@Override
public void flush(File file) throws IOException {
long start = System.currentTimeMillis();
RandomAccessFile randomAccessFile = randomAccessFile(file);
try {
FileChannel channel = randomAccessFile.getChannel();
channel.force(true);
if (LOG.isLoggable(Level.FINE)) {
long stop = System.currentTimeMillis();
LOG.log(Level.FINE, "Flushed {0}: {1} msec", new Object[] {file, stop - start});
}
} finally {
randomAccessFile.close();
}
}
@Override
public void write(File file, long position, ByteBuffer buffer)
throws IOException, InterruptedException {
long start = System.currentTimeMillis();
RandomAccessFile randomAccessFile = randomAccessFile(file);
try {
FileChannel channel = randomAccessFile.getChannel();
channel.position(position);
channel.write(buffer);
if (Thread.interrupted()) {
throw new InterruptedException();
}
long stop = System.currentTimeMillis();
if (LOG.isLoggable(Level.FINE)) {
LOG.log(
Level.FINE,
"Wrote page at {0} of {1}: {2} msec",
new Object[] {position, file, stop - start});
}
} finally {
randomAccessFile.close();
}
}
