[Twisted-Python] suggestions sought on multi-service application dealing with shared database issue

[Jonathan Vanasco]

On Jan 17, 2017, at 5:08 AM, Glyph Lefkowitz wrote:
> 
> It depends if it's easier to keep track of when changes happen, or determine what the current state is.
> 
> If it's easier to keep track of when changes happen, I would recommend calling `setServiceParent` to add/remove the service to the active service hierarchy.  (This will call `startService` / `stopService` for you automatically, as well as cooperating with things like ^c so it's better than calling them yourself).
> 
> If it's easier to query the current state, then a conditional in the timer is a lot simpler.

Thanks for the quick reply.

Can you point to some docs about setServiceParent being used to remove the service?  I couldn't find that anywhere.

I'm leaning towards that approach, because it would just consolidate where I write conditional (one place vs 9 services).  I had intended to run nagios, but got lazy and just installed monit, which was took under 3 minutes to install and configure to invoke an alert and touch/remove a marker on the filesystem to indicate state.


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