Currently im working on my project which will use quartz scheduler 2.2.1, I want to run the job with quartz everyday at 3:21:00 PM and the code below work find. the only problem is the quartz not execute my time exactly as i instruct, for the first time it run exactly at specific time but on the next day and so on it will run only 10 second,30second or more after the time it suppose to execute. i need the quartz to run exactly at the time i have prescribe.
does any one of you have the same problem, what is the way to solve this.
public class QuartzDaily {
public static void main(String[] args) throws ParseException, SchedulerException{
//quart schedule to run job everyday
Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
Date startDate = new SimpleDateFormat("dd.M.yyyy hh:mm:ss a").parse("05.6.2014 3:21:00 PM");
System.out.println(startDate);
JobDetail job = newJob(TestJob.class)
.withIdentity("Job1", "groupJob1")
.build();
Trigger trigger = newTrigger()
.withIdentity("trigger1", "grouprigger")
.startAt(startDate) // first fire time 15:21:00
.withSchedule(simpleSchedule()
.withIntervalInHours(1*24) // interval is actually set at 24 hours' worth of milliseconds
.repeatForever())
.build();
scheduler.scheduleJob(job, trigger);
scheduler.start();
System.out.println("Cron has started");
}
//class containb job to run
public static class TestJob implements Job {
public void execute(JobExecutionContext context) throws JobExecutionException {
System.out.println("Job is Running");
}
}
}
The answer for My Question is:
If you manually change your computer system clock to jump on the date you set the quartz to run, it will effect the quartz job performance. it will take longer to start executing the job.Probably the clock system was having temporary problem to sync all the process within with the newly adjusted time. I have try this my selves and i believe the best way to test your quartz schedule is to wait for the actual date or time to come.
i have try experimenting my selves for three days start from Friday until Monday morning. i set the quartz to run every 5 minute, 20 minutes, 2 hours, 4 hours, daily and every 2 days. al the job run exactly at the time specify.
hope this can be useful tip to other.
Related
I am working with Quartz scheduler and everything work perfect according to the requirement. But there one thing that I want to implement and i.e. I want my next execution of job will trigger on (currentFinishTime + intervalOfScheduler)
Example of job execution with 30 seconds of interval:
Job-1-First-Executed at 10-10-2020 18:30:05
Job-1-Second-Executed at 10-10-2020 18:30:35
Job-1-Third-Executed at 10-10-2020 18:31:05
So, here if the job takes 20 seconds to execute then next trigger will happen on 05+20+30 = 55. Instead of 10-10-2020 18:30:35, it will trigger at 10-10-2020 18:30:55 and same for other execution and so on...
Note: #DisallowConcurrentExecution and MyJobExecutor implements Job {public void execute(JobExecutionContext context){...}} are already implemented.
Please help me to solve my problem.
After a lots of research, I have implemented my own solution which suffice my requirement. The code is mentioned below:
if(isExecutionTimeIncluded) {
final TriggerBuilder triggerBuilder = context.getTrigger().getTriggerBuilder();
final Trigger newTrigger = triggerBuilder
.withSchedule(SimpleScheduleBuilder.simpleSchedule()
.withIntervalInSeconds(cpoPullJobData.getInterval())
.repeatForever())
.startAt(futureDate(interval/*eg.30*/, DateBuilder.IntervalUnit.SECOND);)
.build();
context.getScheduler().rescheduleJob(context.getTrigger().getKey(), newTrigger);
}
I'd like to develop a Java program that executes tasks registered in a database. The tasks have their own cron-like schedule, which is an object of CronExpression of Quartz Scheduler, and saved in the database after being serialized.
Tasks should be executed anytime according to its schedule, so I think the program should be daemonized, and may be able to be restarted or stopped outside the program (like an usual service beneath /etc/init.d/)
I'm studying the examples of Quartz
and saw the program running continuously even if there's no sleep and shutdown method. This seems nice to achieve my purpose, but I'm not sure if this way can generate a daemon process.
// TODO: Retrieve cron format from the database
Trigger trigger = org.quartz.TriggerBuilder.newTrigger()
.withIdentity("trigger1", "group1")
.withSchedule(cronSchedule("* * * ? * MON-FRI"))
.startNow()
.build();
try {
sched.scheduleJob(job, trigger);
sched.start();
// Thread.sleep(90L * 1000L);
// sched.shutdown(true);
} catch (SchedulerException e) {
...
My question is
What is the best way to build a cron job scheduler which runs continuously on a server?
Thank you in advance, and any opinions or questions would be appreciated.
I am using Quartz scheduler to schedule some jobs. Below are my requirement.
All the jobs has to run at 00:00 hrs (EST).
All the jobs will run everyday except Saturday.
So the 2nd one is working fine. But instead of running it on EST it currently runs on GMT. Though i have set the Timezone as EST.
Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
WeeklyCalendar weeklyOff = new WeeklyCalendar ();
weeklyOff.setTimeZone(TimeZone.getTimeZone("est"));
weeklyOff.setDayExcluded(java.util.Calendar.SATURDAY, true);
scheduler.addCalendar("weeklyOff", weeklyOff, false,false);
JobDetail jobScheduleScan = JobBuilder.newJob(jobScheduleScan.class).withIdentity("scheduleScan", "alpaca").build();
Trigger triggerScheduleScan = TriggerBuilder
.newTrigger()
.withIdentity("scheduleTrigger", "alpaca")
.startNow()
//.withSchedule(simpleSchedule().withIntervalInHours(1).repeatForever())
.withSchedule(dailyAtHourAndMinute(00, 00).inTimeZone(TimeZone.getTimeZone("est")))
.modifiedByCalendar("weeklyOff")
.build();
scheduler.scheduleJob(jobScheduleScan,triggerScheduleScan);
scheduler.start();
This is the problem:
TimeZone.getTimeZone("est")
I suspect you write:
System.out.println(TimeZone.getTimeZone("est"));
you'll get something like
sun.util.calendar.ZoneInfo
[id="GMT",offset=0,dstSavings=0,useDaylight=false,transitions=0,lastRule=null]
Basically "est" isn't a valid time zone ID. I suspect you don't mean "EST" anyway, but "Eastern Time" which is EST and EDT, switching appropriately. For that, you should use an ID of "America/New_York", so:
weeklyOff.setTimeZone(TimeZone.getTimeZone("America/New_York"));
If you really want a fixed time zone of UTC-5, you can use:
weeklyOff.setTimeZone(TimeZone.getTimeZone("GMT-05:00"));
Good Day,
Is there any API for Java where I can "add" tasks like an OS? I have a ExecutorService that runs every 1 minute, and during this tick, I need it to send about 10 TCP messages to multiple sockets.
I currently have a function that goes sendMessage(string data,string ipAdd,int port)
I was wondering if there is an EASY API for me to simply go taskScheduler.addTask(sendMessage(..)) in a loop say 10 times for 10 different data, and I am guranteed for them to executed all simultaneously?
Thanks
yes there is. have a look at quartz scheduler.
its really not difficult to set-up:
// Grab the Scheduler instance from the Factory
Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
// and start it off
scheduler.start();
// define the job and tie it to our HelloJob class
JobDetail job = newJob(HelloJob.class)
.withIdentity("job1", "group1")
.build();
// Trigger the job to run now, and then repeat every 40 seconds
Trigger trigger = newTrigger()
.withIdentity("trigger1", "group1")
.startNow()
.withSchedule(simpleSchedule()
.withIntervalInSeconds(40)
.repeatForever())
.build();
// Tell quartz to schedule the job using our trigger
scheduler.scheduleJob(job, trigger);
This is a silly question but I can't seem to find the answer online.
If it is 9:00 am and I schedule a job at 12:00 pm do I need to set my thread.sleep to 3 hours?
In other words, if I set my thread.sleep to just 5 minutes and follow it with a sched.shutdown(true) will my job still run at noon? Or will the scheduler have already shut down? I don't get the point of thread.sleep...Can someone please clarify?
EDIT added code:
try {
SchedulerFactory sf = new StdSchedulerFactory();
Scheduler sched = sf.getScheduler();
JobDetail job = newJob(HelloWorld.class)
.withIdentity("job0","group1")
.build();
CronTrigger trigger = newTrigger()
.withIdentity("trigger1", "group1")
.withSchedule(cronSchedule("0 0 12 ? 1-12 2-6"))
.build();
sched.scheduleJob(job,trigger);
sched.start();
Thread.sleep(300000L); //300000 milliseconds is 5 minutes
sched.shutdown(true);
} catch (SchedulerException ex) {
Logger.getLogger(IBTradeGui.class.getName()).log(Level.SEVERE, null, ex);
}
The sleep is only in the example code to demonstrate quartz. It is not something to do in production code.
It is best to start the scheduler when your application initializes and stop it when your application shuts down. Scheduling jobs is then handled in other parts of your program.