HandlerThreadScheduler.java 文件源码

@Override
public Subscription schedule(final Action0 action, long delayTime, TimeUnit unit) {
    if (innerSubscription.isUnsubscribed()) {
        return Subscriptions.empty();
    }
    final ScheduledAction scheduledAction = new ScheduledAction(action, operationQueue);
    final ScheduledExecutorService executor = IOSScheduledExecutorPool.getInstance();
    Future<?> future;
    if (delayTime <= 0) {
        future = executor.submit(scheduledAction);
    } else {
        future = executor.schedule(scheduledAction, delayTime, unit);
    }
    scheduledAction.add(Subscriptions.from(future));
    scheduledAction.addParent(innerSubscription);
    return scheduledAction;
}