Queue can be used to send multiple commands in a row. It is meant to be used as a layer between HMKit and the app, where all link communication is forwarded to the queue. It returns the response commands or failure indications if the commands fail.

See BleCommandQueue or TelematicsCommandQueue for more info about using the queue.

ConnectedLink link;
BleCommandQueue queue;

void sendCommands() {
  queue = new BleCommandQueue(iQueue);
  // get the VehicleStatus and wait for a response before sending OpenGasFlap.
  queue.queue(new VehicleStatus.GetVehicleStatus(), VehicleStatus.State.class);
  // send OpenGasFlap and only wait for the ack, not the GasFlapState response.
  queue.queue(new Fueling.ControlGasFlap(LockState.LOCKED, Position.CLOSED));
  // send HonkAndFlash straight after the OpenGasFlap ack.
  queue.queue(new HonkHornFlashLights.HonkFlash(3, new Duration(3d, Duration.Unit.SECONDS)));
}

// forward all link communication to the queue.

// MARK: LinkListener

@Override
public void onCommandReceived(Link link, Bytes bytes) {
  queue.onCommandReceived(bytes);
}

@Override
public void onLinkLost(ConnectedLink connectedLink) {
  queue.purge;
}

// MARK: CommandQueue

IBleCommandQueue iQueue = new IBleCommandQueue() {
  @Override public void onCommandAck(Command sentCommand) {
    // An ack was received for a queue command.
  }

  @Override public void onCommandReceived(Command command, Command sentCommand) {
    // One of the queue commands got a response.
  }

  @Override public void onCommandFailed(CommandFailure reason, Command sentCommand) {
    // A command failed. All commands in queue are cancelled.
  }

  @Override public void sendCommand(Command command) {
    // Send a queue command via link 
    link.sendCommand(command, new Link.CommandCallback() {
        @Override public void onCommandSent() {
          queue.onCommandSent(command);
        }

        @Override public void onCommandFailed(LinkError linkError) {
          queue.onCommandFailedToSend(command, linkError);
        }
    });
  }
};