scheduling

Possible Duplicate: How might I schedule a C# Windows Service to perform a task daily? I am creating a C# Windows Service, but I didn't figure out the best way to make timer fire a method daily at a specific time specified in App.Config file (e.g. daily at 6:00AM, my method is executed). How do you do it? Thanks This code should do it: Trigger tg = new DailyTrigger(); ScheduledTasks st = new ScheduledTasks(); Task t = st.OpenTask("foo"); t.Triggers.Add(tg); t.Save(); Create a scheduled task. It's by far the easiest way. If you've got enough access to install a service you should have enough

I have a table of schedule items, they may be scheduled for the same time. I'm wondering how to have them all execute at the correct time when: The problem I see is that executing one scheduled item (like a scheduled twitter post) requires an API request which may take up to a second or two - probably longer. If I execute them sequentially + there are too many scheduled items at the same time, the time they get executed at could be after the scheduled time. How would I go about building this "scheduling" system that avoids these problems? Any tips, advice? Thanks! I would use a Windows service

We have a quartz based scheduler application which runs about 1000 jobs per minute which are evenly distributed across seconds of each minute i.e. about 16-17 jobs per second. Ideally, these 16-17 jobs should fire at same time, however our first statement, which simply logs the time of execution, of execute method of the job is being called very late. e.g. let us assume we have 1000 jobs scheduled per minute from 05:00 to 05:04. So, ideally the job which is scheduled at 05:03:50 should have logged the first statement of the execute method at 05:03:50, however, it is doing it at about 05:06:38.

Is there a way in Java to find the "Last Fired Time" from a Cron Expression. E.g. If now = 25-Apr-2010 10pm, cron expression "0 15 10 ? * *" (quartz) should return me 25-Apr-2010 10:15am Note: 1) I do not care if we use standard cron expressions (like Unix and Quartz) or less popular ones if they can fetch me the correct "Last Fired Time" 2) Also it is not literally "Last Fire time" as the trigger may not have fired, but logically there should be a way of telling when it (would have) fired last. cron-utils is an opensource Java library to parse, validate, migrate crons that supports the

I'm a little new to threading, so you'll have to forgive the naiveté of this question. How is pthread_join implemented and how does it effect thread scheduling? I always pictured pthread_join implemented with a while loop, simply causing the calling thread to yield until the target thread completes. Like this (very approximate pseudocode): atomic bool done; thread_run { do_stuff(); done = true; } thread_join { while(!done) { thread_yield(); // basically, make the thread that calls "join" on // our thread yield until our thread completes } } Is this an accurate depiction, or am I vastly