Re: [Tracker] How to use tracker-miner-rss?

[simon hong <simon hong81 gmail com>]

Hi,

In these days, I'm trying to use tracker-miner-rss.

I tried Tracker-based feed reader ( http://phidias.barberaware.org/ ), but sadly, it cannot build with latest tracker libraries.

I want to write tracker-feed utility to manage feed information for tracker-miner-rss, but currently I don't have enough knowledge about tracker system and rdf ontology.

So, I wrote ttl file to insert feed information for tracker-miner-rss.

=====   ttl file contents - start ======

@prefix nie: <http://www.semanticdesktop.org/ontologies/2007/01/19/nie#>.

@prefix mfo: <http://www.tracker-project.org/temp/mfo#>.

<nytimes> a nie:DataObject, mfo:FeedChannel;

        mfo:feedSettings <nytimesSettings>;

        nie:url "http://feeds.nytimes.com/nyt/rss/Americas";

        nie:title "nytimes - Americas" .

<nytimesSettings> a mfo:FeedSettings;

        mfo:updateInterval 1 .

====== ttl file contents - end =======

After I import this file by using tracker-import, I could confirm by the same sparql query in tracker-miner-rss.

tracker-sparql -q "SELECT ?chanUrl ?interval ?chanUrn WHERE{?chanUrn a mfo:FeedChannel . ?chanUrn mfo:feedSettings ?settings . ?chanUrn nie:url ?chanUrl . ?settings mfo:updateInterval ?interval}"

tracker-query outputs

Results:

  http://feeds.nytimes.com/nyt/rss/Americas, 1, nytimes

After this import, I run "/usr/local/libexec/tracker-miner-rss"

And, It is dead by segmentation fault.

This is the output tracker-miner-rss.

======= tracker-miner-rss output - start ========

Starting log:

  File:'/home/simon/.local/share/tracker/tracker-miner-rss.log'

(tracker-miner-rss:28218): GLib-GObject-WARNING **: invalid cast from `TrackerSparqlBackend' to `TrackerMinerRSS'

(tracker-miner-rss:28218): GLib-GObject-WARNING **: invalid cast from `TrackerSparqlBackend' to `TrackerMiner'

Segmentation Fault

======= tracker-miner-rss output -end =========

Am I wrong to use tracker-miner-rss or my ttl file?

I want to use tracker-miner-rss, but it is difficult to me.

Please give any advices.

Thank you.

Simon.

2011/1/31 Martyn Russell <martyn lanedo com>

On 25/01/11 14:57, Roberto Guido wrote:

On Tue, 2011-01-25 at 23:33 +0900, simon hong wrote:

When I want to add feed adsress, shoud I update feed address in
tracker store by using tracker-sparql?
Is this right?

Yes, it is. All managed feeds are mapped in tracker-store with MFO
ontology, no other configurations are involved.

Some time ago I started a project for a Tracker-based feed reader
( http://phidias.barberaware.org/ ), but as many other things I had noTracker-based feed reader
time to maintain and evolve it. My TODO list is too long :-\
In that package you find feeds-manager, a graphical tool to admin feeds
mapped in tracker-store (add, remove, change attributes...): I'm unsure
it is yet aligned with current version of Tracker's API, try it and if
it doesn't works we can try to fix it.

Actually, it is interesting you mention this, I would like to improve the way feeds are used with the tracker utils perhaps. I agree, we have a miner, but it is not obvious how that miner works or how to get your feeds into it. Perhaps tracker-feed (a new utility) should be written to test and allow simple administration of this?

Any takers?

--
Regards,
Martyn