Schedule something for 2 hours in future?

General
1

Hey,

Wondering if anyone has a solution to this.

So I have an event that when fires uses a timeout node to countdown for 2 hours before I need to turn off the device. It works fine, but the problem with any timeout that is longer than a few minutes is, that if I deploy in the meantime, or restart the server etc, the timeout is lost.

So what I need is a persistent timeout (like using a data store in the change mode), or a way to dynamically create an inject node or something that fires at a certain time (and then gets deleted).

What's the best way to handle this?

I'm thinking that I could set the finish time (now + 2 hours) to a persistant data store, through change, and set up an inject that fires after deploy / start that reads that, sees if a timer was active, and if so resets the timer with (end time - now). Should work, but wondering if there's a better solution I'm missing.

Thanks

2

I think you have already solved your problem! Think about how to implement it!

3

There are some “fun” edges cases to this sort of problem, but the basic principle is right.

4

Or you could use cron-plus and configure it dynamically for the right time. Would have to cope with being switched off over the time it should trigger though

5

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