/**
* Cancels and clears the queue of all tasks that should not be run due to shutdown policy.
* Invoked within super.shutdown.
*/
@Override
void onShutdown() {
BlockingQueue<Runnable> q = super.getQueue();
boolean keepDelayed = getExecuteExistingDelayedTasksAfterShutdownPolicy();
boolean keepPeriodic = getContinueExistingPeriodicTasksAfterShutdownPolicy();
if (!keepDelayed && !keepPeriodic) {
for (Object e : q.toArray())
if (e instanceof RunnableScheduledFuture<?>) ((RunnableScheduledFuture<?>) e).cancel(false);
q.clear();
} else {
// Traverse snapshot to avoid iterator exceptions
for (Object e : q.toArray()) {
if (e instanceof RunnableScheduledFuture) {
RunnableScheduledFuture<?> t = (RunnableScheduledFuture<?>) e;
if ((t.isPeriodic() ? !keepPeriodic : !keepDelayed)
|| t.isCancelled()) { // also remove if already cancelled
if (q.remove(t)) t.cancel(false);
}
}
}
}
tryTerminate();
}
