Manage one time dispatch jobs including edit/rescheduling

how do you manage one time jobs? I do not see task scheduling as a solution . for example: I have a job set by an admin to query group A and send emails at a set DateTime.

Once dispatched to the queue I cannot remove/update it .

so how should I approach it?

My solution is to manage the admin created jobs in a a table and run a command that checks for new jobs on that table.

I am using beanstalkd for queuing

your advise