The attempt to write to dedicated bytebuffers per thread.

DedicatedByteBufferPerThread

abstract class RandomAccessFileWriterTemplate implements Writer<ByteBuffer[]> {
  private final File file;

	public RandomAccessFileWriterTemplate(File file) {
		this.file = file;
	}

	public void write() {
		RandomAccessFile randomAccessFile;
		FileChannel channel = null;
		try {
			randomAccessFile = new RandomAccessFile(file, "rw");
			channel = randomAccessFile.getChannel();
			ByteBuffer[] buffers = new ByteBuffer[10];
			for (int i = 0; i < buffers.length; i++) {
				buffers[i] = ByteBuffer.allocateDirect(1 * MB);
			}
			write(buffers);
			long position = 0;
			for (int i = 0; i < buffers.length; i++) {
				buffers[i].flip();
				channel.write(buffers[i], position);
				position += buffers[i].position();
			}
			channel.truncate(position);
		} catch (Exception e) {
			throw new ParserException("Could not write the file:", e);
		} finally {
			if (channel != null) {
				try {
					channel.close();
				} catch (IOException e) {
					throw new ParserException("Could not close file.", e);
				}
			}
		}
	}
}