Conversation Scope in Vaadin

In my application I need to manage some Spring Beans (like DataSource and EntityManager) awith a scope finer than session : the so called conversation scope.
I need it in order to have within the same vaadin application some long running forms with different transactions open with the DB.
I tryed to find implementations of the conversation scope but I find only implementations compliant with JSF or JSP (Orchestra, WebFlow, SEAM etc…) but not with Vaadin.
Could someone suggest a good solution for that problem.
Tks
Tullio

Nobody can help ?
Tks
Tullio

Afraid not. I’ve used Session and Request scope succesfully with vaadin, and I’ve also developed my own custom ApplicationOrSession scope (where we first look in the session scope, and then the Spring Application scope) but no more than that.,

Cheers,

Charles.