Cloud based Powerpoint compression component in Java/Deployable to CloudFoundry

Creating a java-app for compressing pptx-files with various methods. - Scanning .pptx powerpoints/files and create a list of not-used master decks in the pptx. - Remove not used master-slidedeck out of the pptx - Compress all images in the powerpoint with the standard-compression function. All actions would need to be available with a REST JSON API, versioned and deployable as a Container on CloudFoundry. Therefore Spring should be the favorite framework.