/**
* Get an expired tasks. This is called instead of {@link #tick()} to obtain the next expired
* Task, but without calling it's {@link Task#expire()} or {@link Task#expired()} methods.
*
* @return the next expired task or null.
*/
public Task expired() {
synchronized (_lock) {
long _expiry = _now - _duration;
if (_head._next != _head) {
Task task = _head._next;
if (task._timestamp > _expiry) return null;
task.unlink();
task._expired = true;
return task;
}
return null;
}
}
/**
* @param task
* @param delay A delay in addition to the default duration of the timeout
*/
public void schedule(Task task, long delay) {
synchronized (_lock) {
if (task._timestamp != 0) {
task.unlink();
task._timestamp = 0;
}
task._timeout = this;
task._expired = false;
task._delay = delay;
task._timestamp = _now + delay;
Task last = _head._prev;
while (last != _head) {
if (last._timestamp <= task._timestamp) break;
last = last._prev;
}
last.link(task);
}
}
/* ------------------------------------------------------------ */
public void tick() {
final long expiry = _now - _duration;
Task task = null;
while (true) {
try {
synchronized (_lock) {
task = _head._next;
if (task == _head || task._timestamp > expiry) break;
task.unlink();
task._expired = true;
task.expire();
}
task.expired();
} catch (Throwable th) {
LOG.warn(Log.EXCEPTION, th);
}
}
}
