Getting a UIDetachedException: Cannot set the push mode for a detached UI error

[eoliphan]

Hi, I'm trying to run this with Play 2.2.3 and Vaadin/Scaladin/etc as follows

"com.vaadin" % "vaadin-server" % "7.3.0",
"com.vaadin" % "vaadin-client-compiled" % "7.3.0",
"com.vaadin" % "vaadin-themes" % "7.3.0",
"org.vaadin.addons" % "scaladin" % "3.0.0",
"org.vaadin.playintegration" %% "play-vaadin-integration" % "0.1-SNAPSHOT"

I ran into one issue where in VaadinSupport.onRouteRequest, I was always getting a 404 for my Vaadin app page. Upon investigation, it appeared that super.onRouteRequest was returning a Some for the 404, as opposed a None which would have triggered the code in the orElse. I hacked it by creating my own VaadinSupport and putting the check for a Vaadin page/app first

abstract override def onRouteRequest(request: RequestHeader): Option[Handler] = {
  val serveStatic = Play.current.configuration.getBoolean("vaadin.serve_static_resources") getOrElse true
if (serveStatic && request.path.startsWith("/VAADIN/")) {
  Option(controllers.Assets.at("/VAADIN", request.path.split("/VAADIN/")(1)))
} else onVaadinRequest(request) orElse super.onRouteRequest(request)
}
def onVaadinRequest(request: RequestHeader): Option[Handler] = {

val mappingOption = mappings find {
  request.path startsWith _._1
}
mappingOption map { m => Action {
  m._2.handleRequest(_)
}
}

}

So that worked in that my onVaadinRequest now finds my app in the mappings and attempts to handle it. I'm now getting this exception. And I've no idea what Vaadin is unhappy about

[ServiceException: com.vaadin.ui.UIDetachedException: Cannot set the push mode for a detached UI]