public void processFile(String localFolderPrefix, File file, HtmlWriter htmlWriter) throws IOException {
        String fileName = extractLastPathElement(file.getName());
        Matcher miniMatcher = JPEG_MINI_EXTENSION.matcher(fileName);
        if (miniMatcher.matches() && miniMatcher.group("suffix") == null) {
            String extension = miniMatcher.group("extension");
            logger.info("process jpeg file {}", file);
            readImageStopWatcher.resume();
            BufferedImage image = ImageIO.read(file);
            if (image == null) {
                logger.warn("Something going wrong with file {}. Unable to read image.", file);
            } else {
                readImageStopWatcher.suspend();
                int x = image.getWidth();
                int y = image.getHeight();
                // TODO: fix non-accurate calculation of resize in pixels
                double scale = (double) targetHeightSize / y;
                resizeImageStopWatcher.resume();
                int thumbnailX = (int) (x * scale);
                int thumbnailY = (int) (y * scale);
                BufferedImage thumbnail = resizeImage(image, thumbnailX, thumbnailY);
                resizeImageStopWatcher.suspend();
                String miniPath = trimExtension(file.getAbsoluteFile().toString()) + MINI_SUFFIX + "." + extension;
                try (OutputStream outputStream = new FileOutputStream(miniPath)) {
                    ImageIO.write(thumbnail, "JPEG", outputStream);
                }
                String src = trimExtension(fileName) + MINI_SUFFIX + "." + extension;
                htmlWriter.writeImg("", src, null, x, y, "");
            }
        }
    }

    public static Options createOptions() {
        return new Options()
                .addRequiredOption("s", "source",  true, "Source jpeg files folder")
                .addOption("h", "thumnailheight",  true, "Thumbnail height size in pixels (default = 256)")
                .addOption("w", "clientareawidth", true, "Client area width in pixels (default = 1024)")
                .addOption("r", "rootfoldername",  true, "Root folder name. For ex: 'My Photos'");
    }