我正在使用 Play Framework 2.6.x 创建一个在特定时间（例如凌晨 3 点）运行任务的简单 cron 作业。但现在我陷入了一个简单的计划任务：我创建了一个演员：package actors;import akka.actor.UntypedActor;import org.slf4j.LoggerFactory;public class DoSomethingActor extends UntypedActor {    private static final org.slf4j.Logger log = LoggerFactory.getLogger(DoSomethingActor.class);    @Override    public void onReceive(final Object message) throws Throwable {        log.info("Write your crone task or simply call your method here that perform your task " + message);    }}然后我创建了一个 Schedule 类，每次我设置时调用 Actor：package tasks;import java.util.concurrent.TimeUnit;import javax.inject.Inject;import javax.inject.Named;import javax.inject.Singleton;import akka.actor.ActorRef;import akka.actor.ActorSystem;import akka.actor.Cancellable;import scala.concurrent.duration.Duration;@Singletonpublic class DoSomethingScheduler {    @Inject    public DoSomethingScheduler(final ActorSystem system,            @Named("do-something-actor") final ActorRef doSomethingActor) {        final Cancellable scheduler;        final int timeDelayFromAppStart = 0;        final int timeGapInSeconds = 1; //Here you provide the time delay for every run        system.scheduler().schedule(                Duration.create(timeDelayFromAppStart, TimeUnit.MILLISECONDS), //Initial delay when system start                Duration.create(timeGapInSeconds, TimeUnit.SECONDS),     //Frequency delay for next run                doSomethingActor,                "message for onreceive method of doSomethingActor",                system.dispatcher(),                null);    }}最后，我将这些类绑定到一个模块类中：package modules;import actors.DoSomethingActor;import com.google.inject.AbstractModule;import play.libs.akka.AkkaGuiceSupport;import tasks.DoSomethingScheduler;在这些事情之后，我运行了该应用程序，但它并没有像我预期的那样工作。我希望它每 1 秒显示一次日志记录，但没有任何反应。你能帮我修一下吗？太感谢了！