stub websocket server implementation

class WebSocket extends org.eclipse.jetty.websocket.WebSocket.OnTextMessage {

  def onOpen(conn: Connection) =

  var endpoint : Connection = null

  def onOpen(conn: Connection) = {

    endpoint = conn

    FnordMetric.log_debug("[WebSocket] connection opened")

  }

  def onClose(code: Int, message: String) =

    FnordMetric.log_debug("[WebSocket] connection closed")

  def onMessage(message: String) {

    println("received: " + message);

    val ins = InstructionFactory.parse(message)

    endpoint.sendMessage(ins.execute);

  }