Persist state machine before start and then start it

[ailjushkin]

Hey, guys.
I want to create and persist state machine in it's initial state with extended variables.
Then I want to start it reactively in separate thread, restoring it from database.
Some kind of postponed execution. The goal is to store a lot of tasks. And then have an event loop which would take part of them from DB and start.
I also need some mechanism to check if some of them is complete to get more from DB and start a new one.
How can I achieve this?