You’re dealing with sleep times termed in tens of seconds. The possible savings by changing your sleep option here is likely nanoseconds or microseconds. I’d prefer the latter style every time, but if you have the former and it’s going to cost you a lot to change it, “improving performance” isn’t a particularly good justification. … Read more
While the java.util.Timer used to be a good way to schedule future tasks, it is now preferable1 to instead use the classes in the java.util.concurrent package. There is a ScheduledExecutorService that is designed specifically to run a command after a delay (or to execute them periodically, but that’s not relevant to this question). It has … Read more
Simply cancel the future returned by scheduledAtFixedRate(): // Create the scheduler ScheduledExecutorService scheduledExecutorService = Executors.newScheduledThreadPool(1); // Create the task to execute Runnable r = new Runnable() { @Override public void run() { System.out.println(“Hello”); } }; // Schedule the task such that it will be executed every second ScheduledFuture<?> scheduledFuture = scheduledExecutorService.scheduleAtFixedRate(r, 1L, 1L, TimeUnit.SECONDS); // … Read more
As with the present java SE 8 release with it’s excellent date time API with java.time these kind of calculation can be done more easily instead of using java.util.Calendar and java.util.Date. Use date time class’s i.e. LocalDateTime of this new API Use ZonedDateTime class to handle Time Zone specific calculation including Daylight Saving issues. You … Read more
Your problem is that you misunderstand the purpose of the servlet. It’s intented to act on HTTP requests, nothing more. You want just a background task which runs once on daily basis. EJB available? Use @Schedule If your environment happen to support EJB (i.e. a real Java EE server such as WildFly, JBoss, TomEE, Payara, … Read more
Try adding a Thread.sleep(1000); call within your run() method… Basically it’s the difference between scheduling something based on when the previous execution ends and when it (logically) starts. For example, suppose I schedule an alarm to go off with a fixed rate of once an hour, and every time it goes off, I have a … Read more