I’ve figured out the answer to my question, so I thought I’d add it here. Below is the patch that will add a new scheduler to the 2.6.34 vanilla kernel. Right now, I’ve only compiled the kernel. I fully expect running a system with this EXACT patch will cause it to crash — so use … Read more
It turned out that I could not use the @Scheduled annotation, but I implemented a work-around. In the JavaDoc of the SchedulingConfigurer it is stated that: [SchedulingConfigurer is] Typically used for setting a specific TaskScheduler bean to be used when executing scheduled tasks or for registering scheduled tasks in a programmatic fashion as opposed to … Read more
You can use the cancel() method on Future. From the javadocs of scheduleAtFixedRate Otherwise, the task will only terminate via cancellation or termination of the executor Here is some example code that wraps a Runnable in another that tracks the number of times the original was run, and cancels after running N times. public void … Read more
This works. The key is to have the task itself (after it completes) schedule the next occurrence of the task. import java.util.Timer; import java.util.TimerTask; public class TaskManager { private Timer timer = new Timer(); public static void main(String[] args) { TaskManager manager = new TaskManager(); manager.startTask(); } public void startTask() { timer.schedule(new PeriodicTask(), 0); } … Read more
ScheduledExecutorService runs in your application process. If application process dies, none of the scheduled tasks will run. Hence the need for Service (so your process lives beyond Activities active part of lifecycle). While AlarmManager is critical system service that runs all the time. And if your application scheduled something and was killed, then AlarmManager may … Read more
JavaScript (in a browser) is single threaded. The event loop model means, we’re always in exactly one of two states: in the event loop executing an event handler There are many kinds of events: Click events, onload events, XHR events, timer events, … You’ll have to declare some handlers (at least one during page load), … Read more
The Linux scheduler (on recent Linux kernels, e.g. 3.0 at least) is scheduling schedulable tasks or simply tasks. A task may be : a single-threaded process (e.g. created by fork without any thread library) any thread inside a multi-threaded process (including its main thread), in particular Posix threads (pthreads) kernel tasks, which are started internally … Read more
As pointed out by Remus Rusanu, PowerShell would be the way to go. Here’s a simple one-liner that you can use to create a scheduled task, without needing to write a separate .ps1 file: powershell -ExecutionPolicy Bypass -Command Invoke-WebRequest ‘http://localhost/cron.aspx’ -UseBasicParsing Note that line breaks are added only for clarity in all of these command … Read more
How many images? If you limit the maximum page size, and have a value for the minimum picture height, you can calculate the maximum number of images per page. You would need this when evaluating any solution. I think there were 27 pictures on the link you gave. The following uses the first_fit algorithm mentioned … Read more
The Linux kernel scheduler is actually scheduling tasks, and these are either threads or (single-threaded) processes. So a task (a task_struct inside the kernel), in the context of the scheduler, is the thing being scheduled, and can be some kernel thread like kworker or kswapd, some user thread of a multi-threaded process (like firefox), or … Read more