Multithreading/Transactions/src/Bank.java - master - Nicholas/java_basics

Multithreading/Transactions/src/Bank.java
57 строк2 KB
Nicholay Sokolovsky
19.2 FIX
24 ноя 2023, 10:50
24 ноя 2023, 10:50e7b22fa
import java.util.HashMap;
import java.util.Random;

public class Bank {
    final static String ACCHEADER = "4070281000000";
    private HashMap<String, Account> accounts = new HashMap<>();
    private final Random random = new Random();
    private long accNumber = 1;

    public synchronized boolean isFraud(String fromAccountNum, String toAccountNum, long amount) throws InterruptedException {
        if (amount > 50000) {
            Thread.sleep(1000);
            boolean fraud = random.nextBoolean();
            if (fraud) {
                accounts.get(fromAccountNum).setBlock();
                accounts.get(toAccountNum).setBlock();
            }
            return fraud;
        } else return false;
    }

    public void transfer(String fromAccountNum, String toAccountNum, long amount) throws InterruptedException {
        if (!accounts.get(fromAccountNum).getBlock() &&
            !accounts.get(toAccountNum).getBlock() &&
            !fromAccountNum.equals(toAccountNum) &&
            !isFraud(fromAccountNum, toAccountNum, amount)) {
            accounts.get(fromAccountNum).setMoney(accounts.get(fromAccountNum).getMoney() - amount);
            accounts.get(toAccountNum).setMoney(accounts.get(toAccountNum).getMoney() + amount);
        }
    }

    public boolean getBlockAcc(String acc) {
        return accounts.get(acc).getBlock();
    }

    public long getBalance(String accountNum) {
        return accounts.get(accountNum).getMoney();
    }

    public long getSumAllAccounts() {
        long balance = 0;
        for (Account acc : accounts.values()) {
            balance = balance + acc.getMoney();
        }
        return balance;
    }

    public String openAccount(long amount) {
        String accountNum = ACCHEADER + String.format("%07d", accNumber++);
        accounts.put(accountNum, new Account(amount, accountNum));
        return accountNum;
    }

    public int numOfAccounts() {
        return accounts.size();
    }
}