Send data in multiple ways depending on how you want to send it

I have bunch of keys and values that I want to send to our messaging queue by packing them in one byte array. I will make one byte array of all the keys and values which should always be less than 50K and then send to messaging queue.

Packet class:

public final class Packet implements Closeable {
  private static final int MAX_SIZE = 50000;
  private static final int HEADER_SIZE = 36;

  private final byte dataCenter;
  private final byte recordVersion;
  private final long address;
  private final long addressFrom;
  private final long addressOrigin;
  private final byte recordsPartition;
  private final byte replicated;
  private final ByteBuffer itemBuffer = ByteBuffer.allocate(MAX_SIZE);
  private int pendingItems = 0;

  public Packet(final RecordPartition recordPartition) {
    this.recordsPartition = (byte) recordPartition.getPartition();
    this.dataCenter = Utils.LOCATION.get().datacenter();
    this.recordVersion = 1;
    this.replicated = 0;
    final long packedAddress = new Data().packAddress();
    this.address = packedAddress;
    this.addressFrom = 0L;
    this.addressOrigin = packedAddress;
  }

  private void addHeader(final ByteBuffer buffer, final int items) {
    buffer.put(dataCenter).put(recordVersion).putInt(items).putInt(buffer.capacity())
        .putLong(address).putLong(addressFrom).putLong(addressOrigin).put(recordsPartition)
        .put(replicated);
  }

  private void sendData() {
    if (itemBuffer.position() == 0) {
      // no data to be sent
      return;
    }
    final ByteBuffer buffer = ByteBuffer.allocate(MAX_SIZE);
    addHeader(buffer, pendingItems);
    buffer.put(itemBuffer);
    // sender.sendToQueueAsync(address, buffer.array());
    // sender.sendToQueueSync(address, buffer.array());
    // sender.sendToQueueSync(address, buffer.array(), socket);
    itemBuffer.clear();
    pendingItems = 0;
  }

  public void addAndSendJunked(final byte[] key, final byte[] data) {
    if (key.length > 255) {
      return;
    }
    final byte keyLength = (byte) key.length;
    final byte dataLength = (byte) data.length;

    final int additionalSize = dataLength + keyLength + 1 + 1 + 8 + 2;
    final int newSize = itemBuffer.position() + additionalSize;
    if (newSize >= (MAX_SIZE - HEADER_SIZE)) {
      sendData();
    }
    if (additionalSize > (MAX_SIZE - HEADER_SIZE)) {
      throw new AppConfigurationException("Size of single item exceeds maximum size");
    }

    final ByteBuffer dataBuffer = ByteBuffer.wrap(data);
    final long timestamp = dataLength > 10 ? dataBuffer.getLong(2) : System.currentTimeMillis();
    // data layout
    itemBuffer.put((byte) 0).put(keyLength).put(key).putLong(timestamp).putShort(dataLength)
        .put(data);
    pendingItems++;
  }

  @Override
  public void close() {
    if (pendingItems > 0) {
      sendData();
    }
  }
}

Below is the way I am sending data. As of now my design only permits to send data asynchronously by calling sender.sendToQueueAsync method in sendData() method.

  private void validateAndSend(final RecordPartition partition) {
    final ConcurrentLinkedQueue<DataHolder> dataHolders = dataHoldersByPartition.get(partition);

    final Packet packet = new Packet(partition);

    DataHolder dataHolder;
    while ((dataHolder = dataHolders.poll()) != null) {
      packet.addAndSendJunked(dataHolder.getClientKey().getBytes(StandardCharsets.UTF_8),
          dataHolder.getProcessBytes());
    }
    packet.close();
  }

Now I need to extend my design so that I can send data in three different ways:

• I need to send data asynchronously by calling sender.sendToQueueAsync method.
• or I need to send data synchronously by calling sender.sendToQueueSync method.
• or I need to send data synchronously but on a particular socket by calling sender.sendToQueueSync method. In this case I need to pass socket variable somehow so that sendData knows about this variable.

How should I design my class so that I can tell Packet class that this data needs to be send in either of above three ways assuming I have three different methods in some class to send the data to my messaging queue.