How to make Telegram bot work for each user separately (JAVA)?

Question

Java

Hello. I wrote a telegram bot, it logs in to the electronic diary website and issues a schedule, dz, and so on.
My problem is that the bot runs on the same instance for all users. Please tell me what needs to be done so that a new instance of the bot is created for each user. Thank you.
Here is part of my bot code:

public void onUpdateReceived(Update update) {

 if(message != null && message.hasText()){

        if(message.getText().equals("/start")){
            sendMsg(message, area.toString());
            flag = true;
            flagTwo = true;

        }
        result = message.getText();

        if (message.getText().equals(eq()) && flag) {
            GetAutorization  get = new GetAutorization();
            String mes = message.getText();
            prefs.put("pid", mes);
            get.getArea();
            parseGet = new JParseGetAuthorization();
            parseGet.jParse(get.getResponse());
            ArrayList<School> school = parseGet.getSchool();
            StringBuilder builder = new StringBuilder();
            for(int i = 0; i < school.size(); i++){
                School schools = school.get(i);
                builder.append(schools.getId()).append(": ").append(schools.getName()).append("\n");
            }

            sendMsg(message,builder.toString());
            flag = false;
        }

        if(message.getText().equals(eq(parseGet)) && flagTwo){
            GetAutorization  get = new GetAutorization();
            String mes = message.getText();
            prefs.put("cn", mes);
            get.getCity();
            parseGet = new JParseGetAuthorization();
            parseGet.jParse(get.getResponse());
            ArrayList<School> school = parseGet.getSchool();
            StringBuilder builder = new StringBuilder();
            for(int i = 0; i < school.size(); i++){
                School schools = school.get(i);
                builder.append(schools.getId()).append(": ").append(schools.getName()).append("\n");
            }

            sendMsg(message,builder.toString());
            flagTwo =false;
        }
private void sendMsg(Message message, String str) {

    SendMessage sendMessage = new SendMessage();
    sendMessage.setChatId(message.getChatId().toString());
    sendMessage.setText(str);
    try{
        execute(sendMessage);
    }catch (TelegramApiException ex){
        ex.printStackTrace();
    }

}

Answer 1

I faced a similar problem in the development of my bot. Fixed this problem like this:
Created a field Map userMap; and the Set of States in a separate State class (can be implemented through enum or in another convenient way)
when the user accesses the bot, it enters it in this field, when a new request comes to the bot, it checks if there is a user in the userMap. If there is a user in the list - continue with his State, if not - start from the starting state

The code

@Override
    public void onUpdateReceived(Update update) {
        if (update.hasMessage()) {
            Message inMessage = update.getMessage();
            long chatId = inMessage.getChatId();
            botState = switchBot(inMessage.getFrom());

            if (botState == State.main) {
                if (inMessage.hasText()) {
                ...
            } else if (botState == State.newOrder) {//заявка записаться
                String positiveAnswer = "Спасибо, мы Вам перезвоним";
                String messageAdminsText = "";
                ...
            } else if (botState == State.dev) { //команды разработчика
                if (inMessage.hasText() && inMessage.getFrom().getUserName().equals(Const.DEV)) {
                ...

This is not the best way, you can do better through streams, but I did not bother much with this.