Dear Tim
Unfortunately the docu from 4sience has a lot unsolved issues. E.g.
LDN Inbox URL: this is the url used to send the LDN Notifications.
This url is also used when a notification is received to retrieve the
registered LDN service it belongs to
This URL must is unique among the registered LDN Services
But config/modules/ldn.cfg says
#LDN message inbox endpoint
ldn.notify.inbox = ${dspace.server.url}/ldn/inbox
and
Service URL: the url of the remote Notify Service. This is mostly used as a
descriptive URL when sending notification to an external system.
The service URL must not be confused with the inbox url. As said this url is
descriptive so we expect the main application URL to be added here
So coming back to their documentation on
https://wiki.lyrasis.org/display/DSDOC8x/Use+Cases+-+Getting+two+DSpace+application+to+communicate+with+each+other
* in the example screenshot, they’re both the same. That’s confusing me. I
ask for screenshots of LDN Service from each server. In the wiki page both
entries are pointing on https://dspace-coar.4sience.cloud
* and I asked for local.cfg or other modules where notification and ldn are
specified
All in all we want to let it run and I’m happy to add this to the wiki if it
runs 😉
THX
Jens
--
Jens Witzel
Universität Zürich
Zentrale Informatik
Pfingstweidstrasse 60B
CH-8005 Zürich
mail: [email protected]
phone: +41 44 63 56777
http://www.zi.uzh.ch<http://www.zi.uzh.ch/>
Von: Jens Witzel <[email protected]>
Gesendet: Montag, 24. Februar 2025 16:45
An: DSpace Technical Support <[email protected]>
Betreff: AW: [dspace-tech] Re: COAR PingPong with two DSpace8 servers
Thx Tim, once again
very interesting what Andrea Bollini from 4Science was presenting at COAR
Conference<https://www.youtube.com/live/iwaofixtYoA?t=2017s> – that was exactly
what I want to *see* playing with two DS8. What I want to *know* is how
“Notifocations QA” and “COAR Notify / LDN Service” were configured, and what
else is needed in local.cfg (I think I read the 4Science and Lyrasis
documentation multiple times and tried out a lot).
I’ll ask Andrea or if anybody in this round has experience and screenshots or
ideas to share - I would welcome that very much. => PM me. Once it is running –
I swear – I’ll enrich the documentation! 😊
Kind regards
Jens
--
Jens Witzel
Universität Zürich
Zentrale Informatik
Pfingstweidstrasse 60B
CH-8005 Zürich
mail: [email protected]<mailto:[email protected]>
phone: +41 44 63 56777
http://www.zi.uzh.ch<http://www.zi.uzh.ch/>
Von: DSpace Technical Support
<[email protected]<mailto:[email protected]>>
Gesendet: Montag, 24. Februar 2025 16:09
An: DSpace Technical Support
<[email protected]<mailto:[email protected]>>
Betreff: [dspace-tech] Re: COAR PingPong with two DSpace8 servers
Hi Jens,
I know this is possible, but documentation is currently missing it seems. This
feature to allow two DSpace sites to communicate via Notify was added by the
4Science team.
Here's the ticket where it was initially described (including a link to a video
that shows the expected behavior): https://github.com/DSpace/DSpace/issues/9644
Here's the PRs where the behavior was added
https://github.com/DSpace/DSpace/pull/9645 and
https://github.com/DSpace/dspace-angular/pull/3113 (The first of those PRs
has the basic steps listed for how to configure two DSpaces to talk to one
another.)
If you manage to get it working, I'd very much appreciate better documentation
in this area. It seems to not yet be documented in any of the pages under
https://wiki.lyrasis.org/display/DSDOC8x/COAR+Notify So, if you (or anyone
else reading this) are interested in helping to better document this, I'd
appreciate it.
Tim
On Monday, February 10, 2025 at 9:24:04 AM UTC-6 Jens Witzel wrote:
Hello everyone
Question: Who has ever successfully set up two DS8 instances and had them feed
each other via LDN and COAR?
For a better understanding in the future (and to take a closer look at the
killer feature ‘COAR Notify’ of DS8), we have set up two DS8 instances and are
now working on the configs and the documentation on
https://wiki.lyrasis.org/display/DSDOC8x/COAR+Notify. As we understand it, the
local.cfg on both servers (I'll call them A and B) is extended by
*ldn.enabled=true *and then administered via the ‘COAR Notify’ admin menu:
* Dashboard provides a nice overview of the ‘Number of
received LDN’ and ‘Number of generated LDN’, i.e. Inbox/Outbox
* LDN Services contains profiles about when, who and about what
is informed
This all looks very clear there - big praise to the makers 😊
Now we have set up the profiles on both A and B to the best of our knowledge
and belief and classified them as mutually trustworthy. Everything according to
the instructions https://wiki.lyrasis.org/display/DSDOC8x/COAR+Notify
If I now create a public item on one of the two servers, the LDN message should
go out to the other ... but the dashboard and the logs remain empty.
What else needs to be activated or configured?
The database has tables with the names notifypatterns_to, and
notifyservice_inbound_pattern.
Who has experience here? A hint as to what we are thinking wrong, which logs we
should look at or what we should debug would be great.
Many thanks and greetings from Zurich
Jens & Martin
--
Jens Witzel
Universität Zürich
Zentrale Informatik
Pfingstweidstrasse 60B
CH-8005 Zürich
mail: [email protected]<mailto:[email protected]>
phone: +41 44 63 56777
http://www.zi.uzh.ch<http://www.zi.uzh.ch/>
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