[Standards] MIX-PAM: private PEP node for joined channels

Daniel Gultsch daniel at gultsch.de
Thu Nov 21 15:09:09 UTC 2019

We can probably find solutions for the PubSub delta problem. There might
also be an argument that we should solve this anyway. Normal user archive
(instead of a virtual archive on the pubsub service for example) has
problems if the retention period is not high enough.
I'm not fully convinced that MIX PAM should be blocked by this.

That said I don't want to be overly negative towards putting the channels
into PubSub (I suggested that in the first place.)
If we do, it needs to be properly specified. For example how the access
model looks like (whitelist with the server as the only one on that list
for example). Otherwise it will be very weird on why you can't write
directly to that node. Other node config properties like max items set to
'max' should also be well specified so clients can discover what's going on
with that node even if they don't know about MIX.


On Thu, Nov 21, 2019, 11:53 Holger Weiß <holger at zedat.fu-berlin.de> wrote:

> * Daniel Gultsch <daniel at gultsch.de> [2019-11-20 21:49]:
> > Am Mi., 20. Nov. 2019 um 20:45 Uhr schrieb Linus Jahn <lnj at kaidan.im>:
> > > Also the 'blocking command' way isn't so flexible. Ideally I would
> like to send one request to the
> > > server to receive all updates of all of my implicitly subscribed nodes
> after logging in. (I'm not
> > > entirely sure whether this is currently possible with PEP and MAM
> though?)
> >
> > "Give me the delta" is currently not (properly?) specified in PubSub.
> There's XEP-0312 (PubSub Since), but that's timestamp-based.
> I guess you wouldn't want to base queries on item IDs, as items may be
> overwritten.  So maybe you'd want PubSub-MAM indeed?  Or just make sure
> notifications end up in the user archive?
> Holger
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