Does Quartz scheduler have inclusion calendars

Question

Does Quartz scheduler have inclusion calendars? I see that there exclusion calendars but I do not see anything about inclusion calendars. I would like to be able to select days from calendar and run jobs on those days. There is not necessarily a pattern to the dates. How can I do this in Quartz?

Answer 1

Quartz Calendar only defines inclusions. Here is the interface:

public interface Calendar {

  public boolean isTimeIncluded(long timeStamp);

  public long getNextIncludedTime(long timeStamp);

}

Some implementations are used for defining exclusions but other support inclusions. Take a look at DailyCalendar and its invertTimeRange property.

Since you mention that you want to include only specific days on your calendar, I suspect you might have to implement your own calendar. Check out BaseCalendar which should be a great starting point.

If you're lazy, you might be able to inherit HolidayCalendar and simply change isTimeIncluded to

@Override
public boolean isTimeIncluded(long timeStamp) {
    if (super.isTimeIncluded(timeStamp) == false) {
        return false;
    }

    Date lookFor = getStartOfDayJavaCalendar(timeStamp).getTime();

    return dates.contains(lookFor); // <-- HERE we remove the bang (!)
}

Defining your calendar should be pretty simple. Keep in mind that it needs to be Serializable!

Check out the Quartz Tutorial for more info.