package net.jcip.examples;

import java.util.*;

import net.jcip.examples.DynamicOrderDeadlock.Account;

import net.jcip.examples.DynamicOrderDeadlock.DollarAmount;

/**

* DemonstrateDeadlock

* <p/>

* Driver loop that induces deadlock under typical conditions

*

* @author Brian Goetz and Tim Peierls

*/

public class DemonstrateDeadlock {

private static final int NUM_THREADS = 20;

private static final int NUM_ACCOUNTS = 5;

private static final int NUM_ITERATIONS = 1000000;

public static void main(String[] args) {

final Random rnd = new Random();

final Account[] accounts = new Account[NUM_ACCOUNTS];

for (int i = 0; i < accounts.length; i++)

accounts[i] = new Account();

class TransferThread extends Thread {

public void run() {

for (int i = 0; i < NUM_ITERATIONS; i++) {

int fromAcct = rnd.nextInt(NUM_ACCOUNTS);

int toAcct = rnd.nextInt(NUM_ACCOUNTS);

DollarAmount amount = new DollarAmount(rnd.nextInt(1000));

try {

DynamicOrderDeadlock.transferMoney(accounts[fromAcct], accounts[toAcct], amount);

} catch (DynamicOrderDeadlock.InsufficientFundsException ignored) {

}

}

}

}

for (int i = 0; i < NUM_THREADS; i++)

new TransferThread().start();

}

}