I have a background thread which runs every 5 minutes. I am using ScheduledExecutorService for this. Every five minutes, I am making a call to one of my service and parsing the response coming back from that service.
public class ThreadScheduler {
private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
public void startScheduleTask() {
scheduler.scheduleAtFixedRate(new Runnable() {
public void run() {
try {
callService();
} catch (Exception ex) {
// log error
}
}
}, 0, 5L, TimeUnit.MINUTES);
}
public void callService() throws Exception {
// execute the service and parse the response
}
}
Now the above code is running in 1000 machines and they all are started at the same time, so that means it will make all the 1000 calls every 5 minutes simultaneously to my service. I'm trying to spread the load more evenly over a 5 minute window. Is this possible to do by any chance with the above code?
I am just trying to spread the load more evenly on my service over the 5 minute window so that it doesn't hit my service at the same time which will put more load once all the systems are started up simultaneously.
I came up with the below code trying to spread the load more evenly over the five minute window:
public class ThreadScheduler {
private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
public void startScheduleTask() {
scheduler.scheduleAtFixedRate(new Runnable() {
public void run() {
try {
callService();
} catch (Exception ex) {
// log error
}
}
}, (int)(Math.random()*5*60), 5*60L, TimeUnit.SECONDS);
}
public void callService() throws Exception {
// execute the service and parse the response
}
}
I am opting for code review to see whether this way load will get evenly spread out over the 5 minute window or not.
