Scheduling a java program using another java program

Question

As part of automation I want to schedule a java program after 12 hours using another java program that is currently running. My client machine is windows. I can't say when my first script will start and once it ends, it has to schedule the second script which should start after 12 hours. Any suggestions on how to do it?

It should start 12 hours from when? From when the first script ends? Or from now? What API will you use in the first java program to schedule the second? — Trenin
– Trenin, Commented Aug 19, 2013 at 19:18

Trenin · Accepted Answer · 2013-08-19 19:27:22Z

1

I would use java.util.Timer.schedule(TimerTask task, long delay). The task that you schedule can then invoke the second java program appropriately. For example:

public void scheduleTask() {
    Timer timer = new Timer();
    timer.schedule(new TimerTask() {
        public void run() {
            try {
                Runtime.getRuntime().exec("java secondprog.class &");
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }, 12*1000*60*60);

}

answered Aug 19, 2013 at 19:27

Trenin

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4 Comments

jimSampica Over a year ago

I think using ScheduledExecutorService would be better than Timer

Edward Falk Over a year ago

I think both approaches require that the first app stay alive for 12 hours. I don't know if there's an alternative.

Leo Over a year ago

All the approaches requires the first program to be alive.Is there a way to schedule a bat file in windows using java(using cli in windows)?

Trenin Over a year ago

Ah.. I didn't know that was a requirement. Use a system call with the at command.

duffymo · Accepted Answer · 2013-08-19 19:26:48Z

0

Look into Quartz, a Java scheduling library.

answered Aug 19, 2013 at 19:26

duffymo

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2 Comments

Leo Over a year ago

All the approaches requires the first program to be alive.Is there a way to schedule a bat file in windows using java(using cli in windows)?

duffymo Over a year ago

Use the Windows scheduler.

Community · Accepted Answer · 2017-05-23 12:05:35Z

0

You can use the Windows at command to schedule a task to run. This can be done via a system call.

This has already been answered here: https://stackoverflow.com/a/3397348/2471910

edited May 23, 2017 at 12:05

CommunityBot

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answered Aug 22, 2013 at 14:41

Trenin

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