如何在 Play Framework 中创建一个 cron 作业

Question

我正在创建一个简单的 cron 作业，该作业运行使用 Play Framework 2 在特定时间（例如凌晨 3 点）执行任务。6.x。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);

    }

}

然后我创建了一个调度 class，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;

@Singleton
public 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 class 绑定到模块 class:

package modules;

import actors.DoSomethingActor;
import com.google.inject.AbstractModule;

import play.libs.akka.AkkaGuiceSupport;
import tasks.DoSomethingScheduler;

public class SchedulerModule extends AbstractModule implements AkkaGuiceSupport{

    @Override
    protected void configure() {
        this.bindActor(DoSomethingActor.class, "do-something-actor");
        this.bind(DoSomethingScheduler.class).asEagerSingleton();
    }

}

在这些事情之后，我运行应用程序，但它没有像我预期的那样工作。我预计它会每 1 秒显示一次日志记录，但什么也没发生。

你能帮我解决一下吗？非常感谢！

Answer 1

解决方案是在开发模式下，我必须向应用程序发送 HTTP 请求以加载模块。在生产模式下，它们将立即加载。

如何在 Play Framework 中创建一个 cron 作业

How to create a cron job in Play Framework

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playframework