How to call a thread to run on specific time in java?
Solution 1
Use TimerTask .
Create a TimerTask object with a field variable as your thread. Call the Thread start from the Timer task Run method.
public class SampleTask extends TimerTask {
Thread myThreadObj;
SampleTask (Thread t){
this.myThreadObj=t;
}
public void run() {
myThreadObj.start();
}
}
Configure it like this.
Timer timer new Timer();
Thread myThread= // Your thread
Calendar date = Calendar.getInstance();
date.set(
Calendar.DAY_OF_WEEK,
Calendar.SUNDAY
);
date.set(Calendar.HOUR, 0);
date.set(Calendar.MINUTE, 0);
date.set(Calendar.SECOND, 0);
date.set(Calendar.MILLISECOND, 0);
// Schedule to run every Sunday in midnight
timer.schedule(
new SampleTask (myThread),
date.getTime(),
1000 * 60 * 60 * 24 * 7
);
Solution 2
I think you should better use some library like the Quartz Scheduler. This is basically an implementation of cron for Java.
Solution 3
Have you looked at CountDownLatch from the java.util.concurrent package? It provides a count down then triggers the thread(s) to run. I never needed to use it myself, but have seen it in use a couple times.
Sami
Updated on July 05, 2022Comments
-
Sami almost 2 years
I want o make threads execute at specific exact times (for example at: 2012-07-11 13:12:24 and 2012-07-11 15:23:45)
I checked
ScheduledExecutorService
, but it only supports executing after specific period from the first run and I don't have any fixed periods, instead I have times from database to execute tasks on.In a previous question for a different problem here, TimerTask was the solution, but obviuosly I can't make thread a
TimerTask
asRunnable
andTimerTask
both have the methodrun
which needs to be implemented. The question here if I make the thread extendsTimerTask
and have one implementation ofrun()
, would that work? If not, then how it's possible to do what I'm trying to do?