Q:

How to schedule tasks without Quartz

Can anyone tell,advice how to run a scheduler without Quartz in java. I want to implement such features that if application server remain stop , my scheduler will run. So I thought the executable class to place outside of the war file. So can anyone give me suggestion ? Thanks.

A:

Regarding scheduling tasks without Quartz, you can use Java's ScheduledExecutorService:
ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);

final Runnable beeper = new Runnable() {
    public void run() { System.out.println("beep"); }
};

// Beeps every 10 seconds
scheduler.scheduleAtFixedRate(beeper, 0, 10, TimeUnit.SECONDS);

Now, regarding doing it when your application is not running, I see three options:

Develop a stand-alone application with your scheduled tasks, decoupled from your webapp
Look up for Application Server features for that purpose
OS scheduled tasks, as Linux's cron job

