How do you execute cron job every 5 minutes?

Question

JobDetail job1 = JobBuilder.newJob(FirstJob.class).withIdentity("job1", "group1").build();

        Trigger trigger1 = TriggerBuilder.newTrigger().withIdentity("cronTrigger1", "group1")
                .withSchedule(CronScheduleBuilder.cronSchedule("*/10 * * * * ?")).build();

        Scheduler scheduler1 = new StdSchedulerFactory().getScheduler();
        scheduler1.start();
        scheduler1.scheduleJob(job1, trigger1);

        JobDetail job2 = JobBuilder.newJob(SecondJob.class).withIdentity("job2", "group2").build();

        Trigger trigger2 = TriggerBuilder.newTrigger().withIdentity("cronTrigger2", "group2")
                .withSchedule(CronScheduleBuilder.cronSchedule(new CronExpression("0/7 * * * * ?"))).build();

        Scheduler scheduler2 = new StdSchedulerFactory().getScheduler();
        scheduler2.start();
        scheduler2.scheduleJob(job2, trigger2);

        Thread.sleep(100000);

        scheduler1.shutdown();
        scheduler2.shutdown();

I am trying to execute a Cron Job every 5 minutes of an hour but its not executing on time. I think that the time expression is wrong.

How do you set the time expression for a 1, 5 minute job and a 2 for 1 hour job?

Answer 1

For job 1, 5 minute, you can use:

*/5 * * * * ?

Because the first field is for minutes. If you specify * in this field, it runs every minutes. If you specify */5 in the 1st field, it runs every 5 minutes as shown above.

For job 2, 1 hour, you can use:

0 */1 * * *

Because the second field is for hours. If you specify * in this field, it runs every hour. If you specify */5 in the 2nd field, it runs every 5 hours as shown above.

Not related with cron but your code seems to be missing to pass expression as to TheLostMind comment.

Correct sentence For job 1:

Trigger trigger1 = TriggerBuilder.newTrigger().withIdentity("cronTrigger1", "group1")
                .withSchedule(CronScheduleBuilder.cronSchedule(new CronExpression("*/10 * * * * ?"))).build();

Hope it helps.