How to use

MqttHardwareLoginHandler

in

cc.blynk.server.hardware.handlers.hardware.mqtt.auth

@Override
protected void channelRead0(ChannelHandlerContext ctx, MqttConnectMessage message) {
  String username = message.payload().userName().trim().toLowerCase();
  String token = new String(message.payload().passwordInBytes(), CharsetUtil.UTF_8);
  TokenValue tokenValue = holder.tokenManager.getTokenValueByToken(token);
  if (tokenValue == null || !tokenValue.user.email.equalsIgnoreCase(username)) {
    log.debug("MqttHardwareLogic token is invalid. Token '{}', '{}'", token, ctx.channel().remoteAddress());
    ctx.writeAndFlush(createConnAckMessage(CONNECTION_REFUSED_BAD_USER_NAME_OR_PASSWORD), ctx.voidPromise());
    return;
  }
  User user = tokenValue.user;
  Device device = tokenValue.device;
  DashBoard dash = tokenValue.dash;
  ChannelPipeline pipeline = ctx.pipeline();
  HardwareStateHolder hardwareStateHolder = new HardwareStateHolder(user, tokenValue.dash, device);
  pipeline.replace(this, "HHArdwareMqttHandler", new MqttHardwareHandler(holder, hardwareStateHolder));
  Session session = holder.sessionDao.getOrCreateSessionByUser(
      hardwareStateHolder.userKey, ctx.channel().eventLoop());
  if (session.isSameEventLoop(ctx)) {
    completeLogin(ctx.channel(), session, user, dash, device, -1);
  } else {
    log.debug("Re registering hard channel. {}", ctx.channel());
    ReregisterChannelUtil.reRegisterChannel(ctx, session, channelFuture ->
        completeLogin(channelFuture.channel(), session, user, dash, device, -1));
  }
}

public MQTTHardwareServer(Holder holder) {
  super(holder.props.getProperty("listen.address"),
      holder.props.getIntProperty("hardware.mqtt.port"), holder.transportTypeHolder);
  var hardTimeoutSecs = holder.limits.hardwareIdleTimeout;
  var mqttHardwareLoginHandler = new MqttHardwareLoginHandler(holder);
  var alreadyLoggedHandler = new AlreadyLoggedHandler();
  var hardwareChannelStateHandler = new HardwareChannelStateHandler(holder);
  channelInitializer = new ChannelInitializer<>() {
    @Override
    protected void initChannel(SocketChannel ch) {
      ch.pipeline()
        .addLast("MqttIdleStateHandler", new IdleStateHandler(hardTimeoutSecs, hardTimeoutSecs, 0))
        .addLast(hardwareChannelStateHandler)
        .addLast(new MqttDecoder())
        .addLast(MqttEncoder.INSTANCE)
        .addLast(mqttHardwareLoginHandler)
        .addLast(alreadyLoggedHandler);
    }
  };
  log.debug("hard.socket.idle.timeout = {}", hardTimeoutSecs);
}