Maybe you can consider using
ThreadLocal
as an alternative?
This is an old trick: ThreadLocal variable gives you a static-like access, but are actaully bound to the current executing thread. Even in multi-user environments (like webservers) the processing for a single user is made (mostly) in a single thread. So, by correctly initializing ThreadLocals in the beginning of each http request you can access the data in a static way during the rest of the request. In practice this means per-user statics.
This pattern has been succesfully used with Vaadin also:
See this wiki-article here.