code: public void stop() throws Exception {
          // verify server isn't null
          if (server == null) {
              throw new NullPointerException("Internal server instance was null, server already stopped perhaps?");
          }
          
          logger.info("HttpServer [{}] on [{}] stopping...", configuration.safeGetName(), configuration.getPortString());
  
          server.stop();
  
          logger.info("HttpServer [{}] on [{}] stopped", configuration.safeGetName(), configuration.getPortString());
      }
docs: Stops the HTTP server.
  @throws Exception Thrown if there is an error during stop