Java – how to write cron jobs in play framework 2.3

I'm using play 2.3 8 (activator) & mongodb is DB

I have some products in the product series. Each product has a validity period. Once it expires, I need to delete the documents in the product collection

I am planning to write a cron job to delete documents in the product collection, which will run every day at a specific time

I think I can use annotations like @ on, @ everything in Java (I write code in Java, not in scala) But when I use Google search, I get some plug-ins, tools or solutions

a) https://github.com/ssachtleben/play-plugins/tree/master/cron

b) Quartz job schedule as dependency 2.3 (activator)

c) Akka works asynchronously (I don't know how to use it, how to use the game, even I'm a novice of akka)

I'm in a state of confusion. Can you give me some suggestions below

>Which one can I use according to my requirements? > Did I finish my work correctly? > Is there anything I can do at the database level? Thank you in advance

Solution

This can be done using global class, and the OnStart method can be used https://www.playframework.com/documentation/2.5.x/JavaGlobal

An abstract view of coding is given below I hope it helps

public class Global extends GlobalSettings {

private Cancellable scheduler;

@Override
public void onStart(Application application) {
    int timeDelayFromAppStartToLogFirstLogInMs = 0;
    int timeGapBetweenMemoryLogsInMinutes = 10;
    scheduler = Akka.system().scheduler().schedule(Duration.create(timeDelayFromAppStartToLogFirstLogInMs,TimeUnit.MILLISECONDS),Duration.create(timeGapBetweenMemoryLogsInMinutes,TimeUnit.MINUTES),new Runnable() {
                @Override
                public void run() {
                    System.out.println("Cron Job");
                    // Call a function (to print JVM stats)
                }
            },Akka.system().dispatcher());
    super.onStart(application);
}

@Override
public void onStop(Application app) {
    scheduler.cancel();
    super.onStop(app);
}

}