invoking facebook api(php) using java program hosted in google app engine

I created a Facebook API using PHP and MySQL and hosted it on a domain. Now I开发者_运维技巧 would like to host it on Google App Engine, however, Google App Engine does not support PHP. I would like to learn how to write a Java application that can invoke Facebook's API through HTTP and host the Java application on Google App Engine.

If you have any advice or links on how I can accomplish this, it would be a big help.

FYI GAE does support PHP Now: https://developers.google.com/appengine/docs/php/gettingstarted/introduction