I have written an example web application for my cloud computing lecture. The code is not pretty nor 100% functionally and there are some bugs, but it shows how my applications work. It's just for demonstration purposes and therefore kept simple.

https://github.com/dak0rn/Zwitscher

Feel free to shout me questions or remarks.

Edit: Here's a simple endpoint that uses a service which then works with the database;

https://github.com/dak0rn/Zwitscher/blob/master/src/zwitsche...