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();
}
}