Periodic Object Patterns?

I'm looking for someone to point me in the right direction here.

I'm developing a system that contains objects that are scheduled to
run repeatedly over many months. The scheduled objects generally
either create messages or create files.

I'm looking to decouple the elements of the objects that are involved
in scheduling with the actual tasks of creating messages or files.

Currently I've defined the following elements which are common to all
scheduled (periodic objects):

id, // a unique identifier
type, // the type of scheduled object
runcount, // how many times the scheduled object has run
nextruntime, // the time that the scheduled object should run next
initialstarttime, // the first time the scheduled object ran
priority

Surely there must be some scheduling or periodic object type patterns
out there??