code: @Override
    public VertxEventBus vertxEventBus() throws ResourceException {
      log.finest("getConnection()");
      if (this.mc != null) {
        return this.mc.getVertxEventBus();
      }
      throw new ResourceException("Vertx Managed Connection has been closed.");
    }
docs: Get connection from factory
  
  @return VertxConnection instance
  @exception ResourceException
  Thrown if a connection can't be obtained