I'm working on a web-based front-end for a control system. At first I considered GWT but since it didn't have a server-push mechanism I considered to try Errai. My design goals is that different web clients can each interact with a unique Java object on the server where each object has its own state independent of the other. Moreover, it's crucial that the server can detect if any client abruptly closes or crashes. I'd like to know if I can accomplish that through errai.
Morever, I'd really appreciate if anybody point me to demos and examples since I'm on a very tight schedule and need to start ASAP.