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如何关闭Guava AbstractScheduledService?

guava scheduled-tasks service java

maaartinus · 技术社区 · 6 年前

我正在使用从 AbstractScheduledService ,由 ServiceManager runOneIteration 需要相当长的时间,因此,我的进程需要很长时间才能终止(超过5秒)。

有其他服务继承自 AbstractExecutionThreadService ,有一个类似的问题,我可以通过

@Override
protected final void triggerShutdown() {
    if (thread != null) thread.interrupt();
}

private volatile thread 在 run 方法。但是,没有 triggerShutdown 抽象调度服务 如中所述 this issue .

跳动 少做些工作,但既难看又低效。

stopAsync

1 回复 | 直到 6 年前

Charles 6 年前

你能用这个吗?有什么原因你不能自己添加触发器吗?

class GuavaServer {
    public static void main(String[] args) throws InterruptedException {
        GuavaServer gs = new GuavaServer();
        Set<ForceStoppableScheduledService> services = new HashSet<>();
        ForceStoppableScheduledService ts = gs.new ForceStoppableScheduledService();
        services.add(ts);
        ServiceManager manager = new ServiceManager(services);
        manager.addListener(new Listener() {
            public void stopped() {
                System.out.println("Stopped");
            }

            public void healthy() {
                System.out.println("Health");
            }

            public void failure(Service service) {
                System.out.println("Failure");
                System.exit(1);
            }
        }, MoreExecutors.directExecutor());

        manager.startAsync(); // start all the services asynchronously
        Thread.sleep(3000);
        manager.stopAsync();
        //maybe make a manager.StopNOW()?
        for (ForceStoppableScheduledService service : services) {
            service.triggerShutdown();
        }
    }

    public class ForceStoppableScheduledService extends AbstractScheduledService {

        Thread thread;

        @Override
        protected void runOneIteration() throws Exception {
            thread = Thread.currentThread();
            try {
                System.out.println("Working");
                Thread.sleep(10000);
            } catch (InterruptedException e) {// can your long process throw InterruptedException?
                System.out.println("Thread was interrupted, Failed to complete operation");
            } finally {
                thread = null;
            }
            System.out.println("Done");
        }

        @Override
        protected Scheduler scheduler() {
            return Scheduler.newFixedRateSchedule(0, 1, TimeUnit.SECONDS);
        }

        protected void triggerShutdown() {
            if (thread != null) thread.interrupt();
        }
    }
}