[Nut-upsdev] [Nut-upsuser] [EXTERNAL] Re: On retiring some terminology

[Jim Klimov]

Thank you for the suggestions, keep them coming :)

To me, I think I considered pub-sub but it did not quite fit - gotta
refresh my memory by code re-reading (or expert comments) - I found I'm
vague now on who hits the big red button to shout that a particular power
source device got critical - the upsmon in "master" role, or "upsd" that
talks to all subscribed (indeed!) upsmon's and just some choose to stop
asap (if they won't have enough PSUs powered) and others wait for them to
pull the plug on UPS afterwards :)

So if in a way upsd is a message broker between many clients actively
emitting commands, pub-sub is an option. If upsd emits messages differently
based on roles of registered clients - not so much.

Note also that there technically can be multiple machines with connections
and ability to bring the UPS down (or several UPSes) and perhaps configured
so for redundancy, so in general case it is neither a 1:1 nor 1:many
relationship.

Jim

On Sat, Mar 13, 2021, 05:05 Douglas Parsons <doug at parsonsemail.com> wrote:

> There is,
>
> https://en.m.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern
>
> I said I stayed away from it because of the Cisco link. Others as well as
> you are free to persue it. I was just making suggestions.
>
>
>
>
> On Fri, Mar 12, 2021, 10:43 PM Baker, Lawrence M <baker at usgs.gov> wrote:
>
>> That is terminology from Computer Science.  (Decades ago?)  It is
>> familiar.  Not invented by Cisco.  As in, producer-consumer, from the same
>> time.  Those were all different paradigms for client-server relationships.
>> There must be Wikipedia citations that can be consulted.  As I recall,
>> there were distinctions, such as, producer-consumer were tightly bound,
>> where the producer had no purpose without a consumer.  In
>> publisher-subscriber, subscribers registered their interest in what the
>> publisher had to say, but were neither required to exist at all, or might
>> ignore what was being published.
>>
>> Larry Baker
>> US Geological Survey
>> 650-329-5608
>> baker at usgs.gov
>>
>>
>>
>> On Mar 12 2021, at 7:22:35 PM, Douglas Parsons <doug at parsonsemail.com>
>> wrote:
>>
>> I didn't go there due to its use by Cisco.
>>
>> On Fri, Mar 12, 2021, 10:03 PM Baker, Lawrence M via Nut-upsuser <
>> nut-upsuser at alioth-lists.debian.net> wrote:
>>
>>> Jim,
>>>
>>> The terminology I recall for that one-to-many relationship is
>>> publisher-subscriber.
>>>
>>> Larry Baker
>>> US Geological Survey
>>> 650-329-5608
>>> baker at usgs.gov
>>>
>>>
>>>
>>> On Mar 12 2021, at 6:24:38 PM, Phil Stracchino via Nut-upsuser <
>>> nut-upsuser at alioth-lists.debian.net> wrote:
>>>
>>>
>>>
>>> This email has been received from outside of DOI - Use caution before
>>> clicking on links, opening attachments, or responding.
>>>
>>>
>>>
>>> On 3/12/21 9:14 PM, Rusty Bower wrote:
>>>
>>> Manager/subscriber seems most accurate
>>>
>>> Sent from my iPhone
>>>
>>> On Mar 12, 2021, at 20:13, Douglas Parsons <doug at parsonsemail.com>
>>> wrote:
>>>
>>> 
>>> In place of secondary how about subscriber? It would be accurate to
>>> the role.
>>>
>>>
>>>
>>> I'd been going to suggest controller and ... something.  Controller and
>>> subscriber?
>>>
>>>
>>> --
>>>  Phil Stracchino
>>>  Babylon Communications
>>>  phils at caerllewys.net
>>>  phil at co.ordinate.org
>>>  Landline: +1.603.293.8485
>>>  Mobile:   +1.603.998.6958
>>>
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