如何在Heroku上用Java调整图像大小？

Question

I'm running a Play Framework 2 web app on Heroku, and I need to create thumbnails when users upload images, before saving them to the Amazon s3 cloud. What is the best way to do this?

Note: I am already saving images to s3. I just need to know how to create the thumbnails first.

Answer 1

Ended up using http://www.blitline.com/ . It's a cloud based image processor, and they have a good free plan and reasonable prices after that. They even store my images in s3 for me after they are processed.