public void setDone(boolean b) {
try {
lock.lock();
done = b;
if (!done) cv.signal();
} finally {
lock.unlock();
}
}
public void run() {
try {
lock.lock();
while (true) {
try {
if (done) {
cv.await();
} else {
nextCharacter();
cv.await(getPauseTime(), TimeUnit.MILLISECONDS);
}
} catch (InterruptedException ie) {
return;
}
}
} finally {
lock.unlock();
}
}
public class RandomCharacterGenerator extends Thread implements CharacterSource {
private static char[] chars;
private static String charArray = "abcdefghijklmnopqrstuvwxyz0123456789";
static {
chars = charArray.toCharArray();
}
private Random random;
private CharacterEventHandler handler;
private boolean done = true;
private Lock lock = new ReentrantLock();
private Condition cv = lock.newCondition();
public RandomCharacterGenerator() {
random = new Random();
handler = new CharacterEventHandler();
}
public int getPauseTime() {
return (int) (Math.max(1000, 5000 * random.nextDouble()));
}
public void addCharacterListener(CharacterListener cl) {
handler.addCharacterListener(cl);
}
public void removeCharacterListener(CharacterListener cl) {
handler.removeCharacterListener(cl);
}
public void nextCharacter() {
handler.fireNewCharacter(this, (int) chars[random.nextInt(chars.length)]);
}
public void run() {
try {
lock.lock();
while (true) {
try {
if (done) {
cv.await();
} else {
nextCharacter();
cv.await(getPauseTime(), TimeUnit.MILLISECONDS);
}
} catch (InterruptedException ie) {
return;
}
}
} finally {
lock.unlock();
}
}
public void setDone(boolean b) {
try {
lock.lock();
done = b;
if (!done) cv.signal();
} finally {
lock.unlock();
}
}
}
