How-To: Trigger That Executes Every Week

If you want a trigger that always fires at a certain time of day, use CronTrigger or CalendarIntervalTrigger because they can preserve the fire time’s time of day across daylight savings time changes.

Using CronTrigger

Create a CronTrigger. that executes every Wednesday at 3:00PM:

   
trigger = newTrigger()
    .withIdentity("trigger3", "group1")
    .startNow()
    .withSchedule(weeklyOnDayAndHourAndMinute(DateBuilder.WEDNESDAY, 15, 0)) // fire every wednesday at 15:00
    .build();

OR -

   
trigger = newTrigger()
    .withIdentity("trigger3", "group1")
    .startNow()
    .withSchedule(cronSchedule("0 0 15 ? * WED")) // fire every wednesday at 15:00
    .build();

Using SimpleTrigger

Create a SimpleTrigger that executes 3:00PM tomorrow, and then every 7 * 24 hours (which may not always be at 3:00 PM - because adding 24 hours on days where daylight savings time shifts may result in 2:00 PM or 4:00 PM depending upon whether the 3:00 PM time was started during DST or standard time):

   
trigger = newTrigger()
    .withIdentity("trigger3", "group1")
    .startAt(tomorrowAt(15, 0, 0)  // first fire time 15:00:00 tomorrow
    .withSchedule(simpleSchedule()
            .withIntervalInHours(7 * 24) // interval is actually set at 7 * 24 hours' worth of milliseconds
            .repeatForever())
    .build();

Using CalendarIntervalTrigger

   
trigger = newTrigger()
    .withIdentity("trigger3", "group1")
    .startAt(tomorrowAt(15, 0, 0)  // 15:00:00 tomorrow
    .withSchedule(calendarIntervalSchedule()
            .withIntervalInWeeks(1)) // interval is set in calendar weeks
    .build();