Long running tasks (hours, days, ...) and actor pause

[kfrajtak]

Hi,
I would to get some help on how to implement long running task with actors.

Imagine a workflow which must be approved by an user:

• workflow is initialized
• some actor will send the notification to the user
• the actor will then wait for approval by the user

The actor should probably switch state to waiting and persist it state, right? Can the actor stay alive for the whole time (not counting restarts/shutdowns)? I read this post about PipeTo, can it be applied here? Or should I wait for some message sent to the actor from the UI addressing it by an anchor?

Thanks for hints and clarifications,
Karel