public interface WritableBuffer
{
    void put(CharSequence chars);
}

/**
 * Writable Buffer implementation based on a Netty ByteBuf
 */
public class AmqpWritableBuffer implements WritableBuffer {

    @Override
    public void put(CharSequence chars) {
        final int bytes = ByteBufUtil.utf8Bytes(chars);
        ByteBufUtil.reserveAndWriteUtf8(nettyBuffer, chars, bytes);
    }

}