Also for custom thumbnail we can use RenditionMaker or Asset Handler.By
RenditionMaker, we can associate an Asset "X" with Asset "Y" as a
thumbnail.// Create the Rendition Template for
thumbnailRenditionTemplate[] templates =
createRenditionTemplates(tempThumbnailAsset);// Generate
thumbnailrenditionMaker.generateRenditions(asset, templates);private
RenditionTemplate[] createRenditionTemplates(Asset tempThumbnailAsset) {
ThumbnailConfig[] thumbnails = new ThumbnailConfig[1]; ThumbnailConfig
thum...