Akka Actor获取计时器剩余时间

import akka.actor.AbstractActor;
import scala.concurrent.duration.Duration;
import scala.concurrent.duration.FiniteDuration;

import java.util.concurrent.TimeUnit;

public class MyActor extends AbstractActor {
    private final FiniteDuration delay = Duration.create(5, TimeUnit.SECONDS);
    private final FiniteDuration interval = Duration.create(1, TimeUnit.SECONDS);
    private Cancellable timer;

    @Override
    public Receive createReceive() {
        return receiveBuilder()
                .matchEquals("start", message -> {
                    timer = getContext().getSystem().scheduler().scheduleOnce(delay, getSelf(), "timeout", getContext().dispatcher(), getSelf());
                })
                .matchEquals("timeout", message -> {
                    System.out.println("Timeout occurred");
                })
                .matchEquals("cancel", message -> {
                    timer.cancel();
                })
                .build();
    }

    @Override
    public void postStop() {
        if (timer != null) {
            timer.cancel();
        }
    }
}

long remainingTime = timer.getDelay().length();
System.out.println("Remaining time: " + remainingTime + " milliseconds");