.::Session manager module

Hi everybody -_- ,
i m a beginner on Vaadin , i'm trying to establish a back end of web portal, to full fill this projetc i have to establish a session module; I have to manage the acccess of the different roles of my users .:what:
My question is ; is there any mechanisme in Vaadin that boost my project or shall i define my own code !! :V
Best regards B)

No idea !!

JOJO, if I understood you correctly, you could take a look at Kim's AppFoundation component which has the authorization module and allow easy management and checking permissions in Vaadin app.

Dmitri that's what I mean , thanks for your help I will process on it as soon as possible .
Best regards.