protected IoBuffer getNextBuffer(FileRegion fileRegion) throws IOException {
if (fileRegion.getRemainingBytes() <= 0L) {
return null;
}
int bufferSize = (int) Math.min(getWriteBufferSize(), fileRegion.getRemainingBytes());
IoBuffer buffer = IoBuffer.allocate(bufferSize);
int bytesRead = fileRegion.getFileChannel().read(buffer.buf(), fileRegion.getPosition());
fileRegion.update(bytesRead);
buffer.flip();
return buffer;
}
private int writeFile(
S session, WriteRequest req, boolean hasFragmentation, int maxLength, long currentTime)
throws Exception {
int localWrittenBytes;
FileRegion region = (FileRegion) req.getMessage();
if (region.getRemainingBytes() > 0) {
int length;
if (hasFragmentation) {
length = (int) Math.min(region.getRemainingBytes(), maxLength);
} else {
length = (int) Math.min(Integer.MAX_VALUE, region.getRemainingBytes());
}
localWrittenBytes = transferFile(session, region, length);
region.update(localWrittenBytes);
} else {
localWrittenBytes = 0;
}
session.increaseWrittenBytes(localWrittenBytes, currentTime);
if ((region.getRemainingBytes() <= 0) || (!hasFragmentation && (localWrittenBytes != 0))) {
fireMessageSent(session, req);
}
return localWrittenBytes;
}