scheduling

how to schedule a task at specific time?

两盒软妹~` 提交于 2019-11-28 11:42:27
i have one problem with java scheduler,my actual need is i have to start my process at particular time, and i will stop at certain time ,i can start my process at specific time but i can't stop my process at certain time ,how to specify the process how long to run in scheduler,(here i will not put while ) any one have suggestion for that. import java.util.Timer; import java.util.TimerTask; import java.text.SimpleDateFormat; import java.util.*; public class Timer { public static void main(String[] args) throws Exception { Date timeToRun = new Date(System.currentTimeMillis()); System.out.println

How to do “sequential” Job Scheduling (Quartz?)

我的梦境 提交于 2019-11-28 09:10:49
I'm making use of Quartz Scheduling and there are 2 jobs. First Job is performing the tasks for around 2 minutes and the Second one is to be setup for Cleaning Operations of Temporary Files. So, I need to setup the Schedule to work in a way that after the first job is executed/finished performing tasks I need to do the cleaning operations with the help of Second Job. Considering the Example 9 - Job Listeners under Quartz 2.1.x which states that we can define a method named jobWasExecuted( _, _ ); in the Job Listener and it executes when the 1st job is executed/or comes in running state. Are we

How to execute code in c# service one time per day at the same hour?

时光毁灭记忆、已成空白 提交于 2019-11-28 08:43:11
So here's my problem, I need to do a c# service running on a server who's getting file on ftp one time per day at 3am. I think that I can do it with a thread.sleep() or by compare the DateTime.Now with 3am.... Do you have better solution? Thank you very much for your help! Write a console app or equivalent, and use the Windows Scheduler (or whatever it's called nowadays...) to run it daily. I've used Scheduled Tasks successfully for backups, but I have a word of caution ... Scheduled tasks are not be performed if you log out. I'm not sure if this can be overidden, but I have been caught out by

Concurrent execution of scheduled tasks in Java

跟風遠走 提交于 2019-11-28 08:30:55
问题 I have a TimerTask that is designed to gather metrics at a specific interval. However it is possible that the period of the task execution is less than the time of task execution (occasionally if something times out and gets delayed). Is there a way to execute multiple TimerTasks or Runnables, threads, etc. concurrently without waiting for the previous task to complete? I know that Timer uses a single thread, and the ScheduledThreadPoolExecutor will delay execution regardless of the rate.

how to schedule a task in MVC4 C#?

二次信任 提交于 2019-11-28 08:13:26
I wanna create a notification system on my website?(something like stack-overflow) How can we schedule a task for mailing the notification for users on each 24 hours? Can we use MVC4 or we should use windows service ? Edit: My Experience with using FluentScheduler in 3 month within a MVC4 App . FluentScheduler is easy to config and using but it doesn't run tasks any time. Sometimes run and sometimes doesn't run. I think the best way for scheduling is Windows Service to ensure running a task at the specific time. Found this to be an awesome scheduler, FluentScheduler Usage: // Schedule an ITask

Reschedule timer in android

扶醉桌前 提交于 2019-11-28 06:15:42
How can I reschedule a timer. I have tried to cancel the timer/timertask and and schedule it again using a method. But its showing an exception error: Exception errorjava.lang.IllegalStateException: TimerTask is scheduled already Code I have used it : private Timer timer = new Timer("alertTimer",true); public void reScheduleTimer(int duration) { timer.cancel(); timer.schedule(timerTask, 1000L, duration * 1000L); } If you see the documentation on Timer.cancel() you'll see this: "Cancels the Timer and all scheduled tasks. If there is a currently running task it is not affected. No more tasks may

Concurrency of posix threads in multiprocessor machine

南楼画角 提交于 2019-11-28 04:27:35
问题 I have some doubts regarding concurrency of posix threads in multiprocessor machine. I have found similar questions in SO regarding it but didnt find conclusive answer. Below is my understanding. I want to know if i am correct. Posix threads are user level threads and kernel is not aware of it. Kernel scheduler will treat Process( with all its threads) as one entity for scheduling. It is the thread library that in turn chooses which thread to run. It can slice the cpu time given by the kernel

How can I see which CPU core a thread is running in?

∥☆過路亽.° 提交于 2019-11-28 03:27:39
In Linux, supposing a thread's pid is [pid], from the directory /proc/[pid] we can get many useful information. For example, these proc files, /proc/[pid]/status,/proc/[pid]/stat and /proc/[pid]/schedstat are all useful. But how can I get the CPU core number that a thread is running in? If a thread is in sleep state, how can I know which core it will run after it is scheduled again? BTW, is there a way to dump the process(thread) list of running and sleeping tasks for each CPU core? David Schwartz The answer below is no longer accurate as of 2014 Tasks don't sleep in any particular core. And

Class Scheduling to Boolean satisfiability [Polynomial-time reduction]

為{幸葍}努か 提交于 2019-11-28 03:12:04
I have some theoretical/practical problem and I don't have clue for now on how to manage, Here it is: I create a SAT solver able to find a model when one is existing and to prove the contradiction when it's not the case on CNF problems in C using genetics algorithms. A SAT-problem looks basically like this kind of problem : My goal is to use this solver to find solutions in a lot of different NP-completes problems. Basically, I translate different problems into SAT, solve SAT with my solver and then transform the solution into a solution acceptable for the original problem. I already succeed

PHP function that receive a cron string and return the next run timestamp

我是研究僧i 提交于 2019-11-28 02:46:43
问题 I need to develop a task system that should be able to work on servers that doesn't support crontab. I'm asking if there is any existing code that can take a cron string (e.g. '0 0,12 1 */2 *' and return the timestamp of the next scheduled run. If such a code couldn't be found then how should I start with that? 回答1: You could use this class PHP-Parse-cron-strings-and-compute-schedules It'll also compute the last scheduled run 回答2: Use this function: function parse_crontab($time, $crontab) {