Message Scheduling

You can schedule sending messages to actor that will be acted upon in the future. To achieve that you can use the following methods on the Actor System:

• ScheduleOnce - will send the given message to a local actor once after a given interval

• Schedule - will send the given message to a local actor at a given interval

• RemoteSchedule - will send the given message to a remote actor at a given interval. This requires remoting to be enabled on the actor system.

• RemoteScheduleOnce - will send the given message to a remote actor once after a given interval. This requires remoting to be enabled on the actor system.

• ScheduleWithCron - will send the given message to a local actor using a cron expression.

• RemoteScheduleWithCron - will send the given message to a remote actor using a cron expression. This requires remoting to be enabled on the actor system.

• CancelSchedule - will cancel a prior scheduled message given its reference

• PauseSchedule - will pause a prior scheduled message given its reference

• ResumeSchedule - will resume a prior paused scheduled message given its reference.

Cron Expression Format

Field	Required	Allowed Values	Allowed Special Characters
Seconds	yes	0-59	, - * /
Minutes	yes	0-59	, - * /
Hours	yes	0-23	, - * /
Day of month	yes	1-31	, - * ? /
Month	yes	1-12 or JAN-DEC	, - * /
Day of week	yes	1-7 or SUN-SAT	, - * ? /
Year	no	empty, 1970-	, - * /

Note

All the schedule method comes with a ScheduleOption that can help configure:

• The Sender to set the message's sender when the scheduled message is delivered

• The SenderAddress to set the message's sender address. This is suitable for remote message scheduling

• The Reference uniquely identifies the scheduled message and can be used later to manage it such as canceling, pausing or resuming.