sked contains java code related to scheduling.
Cron expression parsing is based on the GNU crontab manpage that can be found here: http://unixhelp.ed.ac.uk/CGI/man-cgi?crontab+5
The following extensions are used:
- a mandatory field is added at the begining: seconds.
- a special string is added: @minutely
- a special character is added: ? to choose between dayOfMonth and dayOfWeek
The ? special char has the same behavior as in the Quartz Scheduler expression. The wikipedia page http://en.wikipedia.org/wiki/CRON_expression explains Quartz Scheduler expression, not simple cron expressions. You'll find there about the ? special char and maybe that some other extensions you would like to use are missing in this project.
The project is hosted in maven central. Here you'll find a quick copy/paste for the dependency.
sked-2.1 - Released 2014/01/12
- Made SLF4J dependency optional
- Starting with this version, sked has zero dependencies
sked-2.0 - Released 2014/01/11
- Removed Joda-Time dependency, now using plain old java.util.Calendar only
- Changed package!
- Minor optimisations
sked-1.2 - Released 2011/02/07
- Added a CronScheduleFactory with convenience methods to ease cron expression generation
- CronSchedule instances are now Serializable.
sked-1.1 - Released 2010/12/31
- Fixed a corner case bug in CronSchedule.firstRunAfter( timestamp ) when timestamp is less than a second ahead of previous run
sked-1.0 - Released 2010/12/12
- Initial release, do not use, contains a bug fixed in 1.1