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Re: [T2TRG] OCF Observe on special interfaces, design question, RFC requirements?

Michael Koster <michael.koster@smartthings.com> Wed, 10 July 2019 00:08 UTC

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From: Michael Koster <michael.koster@smartthings.com>
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Date: Tue, 09 Jul 2019 17:08:03 -0700
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Cc: Klaus Hartke <hartke@projectcool.de>, "t2trg@irtf.org" <t2trg@irtf.org>, core <core@ietf.org>
To: Michael Koster <michaeljohnkoster@gmail.com>
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Subject: Re: [T2TRG] OCF Observe on special interfaces, design question, RFC requirements?
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Hi Klaus,

What if we retained the last notified state such that it would also be returned by polling?

> On Jul 9, 2019, at 4:34 PM, Michael Koster <michaeljohnkoster@gmail.com> wrote:
> 
> Thank you, Klaus.
> 
>> On Jul 9, 2019, at 3:24 PM, Klaus Hartke <hartke@projectcool.de <mailto:hartke@projectcool.de>> wrote:
>> 
>> When observing a resource with a rather large representation, it might
>> often make more sense to observe a projection of that resource. That
>> is, to observe a resource X whose state depends on the state of
>> another resource Y.
> 
> This is already the intention with providing the alternate URI through the use of the query parameter. It is a different resource which is a projection of the state of the base resource.
> 
> klaus> * The state of X is a list of the last 10 additions/removals to that list.
> 
> Or perhaps the last one addition or removal...
> 
> What we are doing is not that different.
> 
> Best regards,
> 
> Michael
> 
>

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