scheduling

I want to run a task every minute on Heroku to check if conditions are met to time-out certain user tasks. I can only run a Heroku cron job every hour, so what's the best way to set up a timed task like this. I am using Rails 3.1 on Heroku. You could use delayed_job with a self-restarting job with a :run_at . Something sort of like this: class YourJob def do_interesting_things #... Do what needs to be done. self.delay(:run_at => 1.minute.from_now).do_interesting_things end def self.start_me_up new.do_interesting_things end end And then somewhere during your application's initialization:

I know the very basics about using coroutines as a base and implementing a toy scheduler. But I assume it's oversimplified view about asynchronous schedulers in whole. There are whole set of holes missing in my thoughts. How to keep the cpu from running a scheduler that's running idle/waiting? Some fibers just sleep, others wait for input from operating system. You'd need to multiplex io operations into an event based interface(select/poll), so you can leverage the OS to do the waiting, while still being able to schedule other fibers. select/poll have a timeout argument - for fibers that want

How can I execute an action (maybe an Intent) on every specified time (e.g. Every day on 5AM)? It has to stay after device reboots, similar to how cron works. I am not sure if I can use AlarmManager for this, or can I? If you want it to stay after the device reboots, you have to schedule the alarm after the device reboots. You will need to have the RECEIVE_BOOT_COMPLETED permission in your AndroidManifest.xml <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /> A BroadcastReceiver is needed as well to capture the intent ACTION_BOOT_COMPLETED <receiver android:name="

Who schedules the scheduler? Which is the first task created and how is this first task created? Isn't any resource or memory required for it? isn't like a chicken and egg scenario? Isn't scheduler a task? Does it get the CPU at the end of each time slice to check which task needs to be given CPU? Are there any good links which makes a person think and understand deeply all these concepts rather than spilling out some theory which needs to be byhearted? The scheduler is scheduled by an (external) event such as an interrupt, (disk done, mouse click, timer tick) or an internal event (such as the

How do I schedule a task with celery that runs on 1st of every month? Since Celery 3.0 the crontab schedule now supports day_of_month and month_of_year arguments: http://docs.celeryproject.org/en/latest/userguide/periodic-tasks.html#crontab-schedules You can do this using Crontab schedules and you cand define this either: in your django settings.py : from celery.schedules import crontab CELERYBEAT_SCHEDULE = { 'my_periodic_task': { 'task': 'my_app.tasks.my_periodic_task', 'schedule': crontab(0, 0, day_of_month='1'), # Execute on the first day of every month. }, } in celery.py config: from

I want to use a timer in my simple .NET application written in C#. The only one I can find is the Windows.Forms.Timer class. I don't want to reference this namespace just for my console application. Is there a C# timer (or timer like) class for use in console applications? albertein System.Timers.Timer And as MagicKat says: System.Threading.Timer You can see the differences here: http://intellitect.com/system-windows-forms-timer-vs-system-threading-timer-vs-system-timers-timer/ And you can see MSDN examples here: http://msdn.microsoft.com/en-us/library/system.timers.timer(VS.80).aspx And here: