使用guava AbstractScheduledService(Using guava AbstractScheduledService)

 我正在尝试使用guava AbstractScheduledService定期执行一些任务： 
 
public class MyService extends AbstractScheduledService {

    public MyService() {

    }

    @Override
    protected void runOneIteration() {
        doStuff();
    }

    private void doStuff() {
    // Do stuff
    }

    @Override
    protected Scheduler scheduler() {
        return Scheduler.newFixedRateSchedule(0, 8, TimeUnit.HOURS);
    }

}
 
 所以这项服务应该每8小时定期执行一些任务，但实际上并不是这样。 继承的isRunning()方法返回false，并且永远不会调用runOneIteration()方法。 
 
 我已经设法通过从我的服务构造函数调用startAsync()方法（从父类继承startAsync()来使它工作，但我没有看到任何引用说这是应该工作的方式。 
 
 我错过了什么吗？ 这是AbstractScheduledService工作方式吗？ 

I'm trying to execute some task periodically using guava AbstractScheduledService :
 
public class MyService extends AbstractScheduledService {

    public MyService() {

    }

    @Override
    protected void runOneIteration() {
        doStuff();
    }

    private void doStuff() {
    // Do stuff
    }

    @Override
    protected Scheduler scheduler() {
        return Scheduler.newFixedRateSchedule(0, 8, TimeUnit.HOURS);
    }

}
 
So this service should execute some task periodically every 8 hours but it never actually does. The inherited isRunning() method returns false and the runOneIteration() method never gets invoked.
 
I have managed to make it work by calling the startAsync() method (inherited from parent class) from my service constructor but I don't see any reference saying this is the way it should work.
 
Have I missed something here? Is this the way the AbstractScheduledService works?

原文：https://stackoverflow.com/questions/25499811