Re: [Tracker] Integrating Tracker and Zeitgeist in Solang

[Seif Lotfy <seiflotfy googlemail com>]

GAJ already makes use of both

Collect all matches for the search criteria using Tracker. Then take the URIS of the files targeted by the "search criteria" and ask zeitgeist to sort them for you based on populartiy or recency.

Cheers

Seif

2010/2/9 Debarshi Ray <debarshi ray gmail com>

I have spent some time thinking how to integrate both Tracker and
Zeitgeist in Solang [1] and I am repeatedly hitting the wall when
trying to figure out a way to abstract out accesses to two different
databases. I am going to use Solang to describe my problem but I
suspect this would be true to some extent for some other applications
as well.

In Solang whenever we try to search (based on free text or URIs, tags,
Exif meta-data) we put the criteria in a search manager which
generates the SPARQL query and retrieves a list of photos from
Tracker. You can find a bit more in the FOSDEM slides [2]. Now it
would be only too natural to allow the user to search for the most
recent photos and such in the same way she would initiate a search
based on the other criteria. But this information, as far as I
understand, is present in Zeitgeist. So the current approach of just
iterating over all the criteria in the search manager and creating a
SPARQL query won't really work if all the criteria are divided into
Tracker and Zeitgeist.

Ofcourse the UI can be divided into "search Tracker" and "search
Zeitgeist" but might be a bad thing to do. After all the user does not
really care. :-)

So any suggestions? I am out of ideas at the moment.

Thanks,
Debarshi

[1] http://projects.gnome.org/solang/
[2] http://rishi.fedorapeople.org/solang-fosdem.pdf
--
One reason that life is complex is that it has a real part and an
imaginary part.
   -- Andrew Koenig
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