package primer3_synchronized;

/**
 * Banka sa odredjenim brojem racuna koja koristi synchronization primitive
 * 
 */

public class Bank2 {

	private final double[] accounts;

	public Bank2(int n, double initialBalance) {
		accounts = new double[n];
		for (int i = 0; i < accounts.length; i++)
			accounts[i] = initialBalance;
	}

	public synchronized void transfer(int from, int to, double amount) throws InterruptedException {
		while (accounts[from] < amount)
			wait();
		System.out.print(Thread.currentThread());
		accounts[from] -= amount;
		System.out.printf(" %10.2f from %d to %d", amount, from, to);
		accounts[to] += amount;
		System.out.printf(" Total Balance: %10.2f%n", getTotalBalance());
		notifyAll();
	}

	public synchronized double getTotalBalance() {
		double sum = 0;
		for (double a : accounts)
			sum += a;
		return sum;
	}

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