Examples with CannotGenerateThumbnailException org.olat.core.commons.services.thumbnail.CannotGenerateThumbnailException used on opensource projects

Example 6 with CannotGenerateThumbnailException

use of org.olat.core.commons.services.thumbnail.CannotGenerateThumbnailException in project openolat by klemens.

the class MetaInfoFileImpl method getThumbnailInfo.

private Thumbnail getThumbnailInfo(int maxWidth, int maxHeight, boolean fill) {
    for (Thumbnail thumbnail : thumbnails) {
        if (maxHeight == thumbnail.getMaxHeight() && maxWidth == thumbnail.getMaxWidth()) {
            if (thumbnail.exists()) {
                return thumbnail;
            }
        }
    }
    // generate a file name
    File metaLoc = metaFile.getParentFile();
    String name = originFile.getName();
    String extension = FileUtils.getFileSuffix(name);
    String nameOnly = name.substring(0, name.length() - extension.length() - 1);
    String randuuid = UUID.randomUUID().toString();
    String thumbnailExtension = preferedThumbnailType(extension);
    File thumbnailFile = new File(metaLoc, nameOnly + "_" + randuuid + "_" + maxHeight + "x" + maxWidth + (fill ? "xfill" : "") + "." + thumbnailExtension);
    // generate thumbnail
    long start = 0l;
    if (log.isDebug())
        start = System.currentTimeMillis();
    VFSLeaf thumbnailLeaf = new LocalFileImpl(thumbnailFile);
    VFSLeaf originLeaf = new LocalFileImpl(originFile);
    if (thumbnailService != null && thumbnailService.isThumbnailPossible(thumbnailLeaf)) {
        try {
            if (thumbnails.isEmpty()) {
                // be paranoid
                cannotGenerateThumbnail = true;
                write();
            }
            log.info("Start thumbnail: " + thumbnailLeaf);
            FinalSize finalSize = thumbnailService.generateThumbnail(originLeaf, thumbnailLeaf, maxWidth, maxHeight, fill);
            if (finalSize == null) {
                return null;
            } else {
                Thumbnail thumbnail = new Thumbnail();
                thumbnail.setMaxHeight(maxHeight);
                thumbnail.setMaxWidth(maxWidth);
                thumbnail.setFinalHeight(finalSize.getHeight());
                thumbnail.setFinalWidth(finalSize.getWidth());
                thumbnail.setFill(true);
                thumbnail.setThumbnailFile(thumbnailFile);
                thumbnails.add(thumbnail);
                cannotGenerateThumbnail = false;
                write();
                log.info("Create thumbnail: " + thumbnailLeaf);
                if (log.isDebug()) {
                    log.debug("Creation of thumbnail takes (ms): " + (System.currentTimeMillis() - start));
                }
                return thumbnail;
            }
        } catch (CannotGenerateThumbnailException e) {
            // don't try every time to create the thumbnail.
            cannotGenerateThumbnail = true;
            write();
            return null;
        }
    }
    return null;
}