This project is a skeleton application with a simple configuration of Apache Shiro for authentication/authorization. It's ready to be deployed on Heroku.
It's based on hello-vaadin-heroku and adding Shiro to the stack.
The Shiro integration is largelly based on vaadin-shiro-simple
As an example, this application is deployed on heroku and accessible at http://vaadin-heroku-shiro.herokuapp.com/
You can log-in as admin/admin or demo/demo