public synchronized void dispose() {
List<SchedulerListener> l = listeners;
listeners = null;
if (l != null) {
boolean cont = true;
while (cont) {
synchronized (l) {
int queueSize = getQueueSize();
if (queueSize == 0) {
cont = false;
} else {
try {
l.wait();
} catch (InterruptedException ex) {
// Ignore!
}
}
}
}
synchronized (l) {
l.clear();
}
}
}
