Session resource registry example

sessionresource.scala

object SessionResourceRegistry {
  /** map of session id's to closeables */
  private[this] val resources: ConcurrentHashMap[String, Seq[Closeable]] = new ConcurrentHashMap();
  
  def registerResource(sessionId: String, resource: Closeable): Unit = {
    // add the resource to the hash map
  }
  
  def onSessionShutdown(session: LiftSession): Unit = {
    val sessionId = session.uniqueId
    
    Option(resources.get(sessionId)) match {
      case None => //no resources, do nothing
      case Some(resources) =>
        resources.foreach(_.close())
        resources.remove(sessionId)
    }
  }
}