I'm working to integrate Terracotta with Roma Framework. The problem I encountered until now are due to Echo2 framework. It stores in HttpSession references to internal components and HttpSession itself.
This is the reason because Terracotta Session Configuraor asks me to insert in the tc-config.xml so many classes and boot-classes!
What I'd like to try is to store only user domain objects. If will work, the clustering workload will be much more light and the user (programmer) will not worry anymore about to assure any frameworks he's using to be terracotta compatible.
Good luck to myself!