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Re: [Tracker] Tracker-WARNING **: file is encrypted or is not a database

On Fri, 2011-08-05 at 12:34 +0530, suparno bose wipro com wrote:

Thatâs  kool.
Hey man can you help me with where to find the source code of SPAQL ??


SPARQL isn't a software but a specification that has multiple
implementations.

Tracker has its own SPARQL parser and implementation, but there are
others too. Tracker's can be found in libtracker-data

If you mean QSparql then:

http://maemo.gitorious.org/maemo-af/qsparql



Is there any more  dependencies??

Thnks 
Suparno

-----Original Message-----
From: Adrien Bustany [mailto:abustany gnome org] 
Sent: Friday, August 05, 2011 12:28 PM
To: Suparno Bose (WT01 - Manufacturing & Hi Tech)
Cc: tracker-list gnome org
Subject: RE: [Tracker] Tracker-WARNING **: file is encrypted or is not a database

If you can compile a Qt app with  your tools, you should be able to compile QSparql as well :)

On Fri, 5 Aug 2011 11:49:41 +0530, suparno bose wipro com wrote:

Adrien.
    Actually am working on Automotive linux platform . We can only use 
the Host cross platform tools provided To me only. So no qsparql is  
provided but only tracker-sparql .

I am also fond of Qt only. Is there any way I can compile  the qsparql 
library with my application only?

Thanks
Suparno

-----Original Message-----
From: Adrien Bustany [mailto:abustany gnome org]
Sent: Friday, August 05, 2011 11:43 AM
To: Suparno Bose (WT01 - Manufacturing & Hi Tech)
Cc: tracker-list gnome org
Subject: Re: [Tracker] Tracker-WARNING **: file is encrypted or is not 
a database

Note: don't forget to click "Reply to all" so that your answer goes 
back to the list too. CC-ing back the list

The SPARQL query you pasted is correct, so not sure why you would get 
this error. Can you see a file named 38-nmm.ontology in 
$prefix/share/tracker/ontologies ? I think that query worked for you 
if ran with the tracker-sparql tool, so it should work all the same if 
ran using libtracker-sparql.

I might be a bit stubborn, but QSparql works all fine on ARM, both 
Harmattan and MeeGo use it. I'm insisting a bit because:
1. The asynchronous models of GLib and Qt are a bit different, QSparql
   abstracts that nicely.
2. QSparql will make your memory management more c++-y, with objects 
on
   stack freed automatically etc. The example code you pasted presents
   various memory management errors (leaks).
3. QSparql allow you do deal with bindings, so that you don't have to
   escape the data you pass to your queries, and other niceties.

Compiling/packaging QSparql is easy, and it does not take much space.
If you want to make it minimal, you can enable only the driver you 
need (most likely QTRACKER_DIRECT), and maybe even compile it in 
statically (iirc).

Cheers

Adrien

Le Fri, 5 Aug 2011 11:28:23 +0530,
<suparno bose wipro com> a Ãcrit :


Hello Adrien,

                Thanks for you concern. I am developing on an arm 
platform where qsparql is  not available.



I am also getting an error as



Error Message 1.44: syntax error, use of undefined prefix `nmm'

Can you enlighten me on this error, why we get this  error??



Thnks

Suparno





-----Original Message-----
From: Adrien Bustany [mailto:abustany gnome org]
Sent: Friday, August 05, 2011 11:20 AM
To: Suparno Bose (WT01 - Manufacturing & Hi Tech)
Cc: martyn lanedo com; tracker-list gnome org
Subject: Re: [Tracker] Tracker-WARNING **: file is encrypted or is 
not a database



Hello Suparno!



Did you have a look at QSparql? It'll give you access to Tracker in 
a
much more Qt-ish way. In any case, you can have a look at the 
examples
for either library, that might help you get started:

libtracker-sparql (not so simple one):


http://git.gnome.org/browse/tracker/tree/examples/libtracker-sparql/as
ync-connection.c

<http://git.gnome.org/browse/tracker/tree/examples/libtracker-sparql/a
sync-connection.c>

qsparql:


https://maemo.gitorious.org/maemo-af/qsparql/blobs/master/examples/spa
rql/simple/main.cpp

<https://maemo.gitorious.org/maemo-af/qsparql/blobs/master/examples/sp
arql/simple/main.cpp>



In your case, not sure why tracker_sparql_connection_get would 
fail...

What platform are you developing on? Are there special restrictions 
to
the DB access?



Cheers



Adrien



Le Fri, 5 Aug 2011 10:05:28 +0530,

<suparno bose wipro com <mailto:suparno bose wipro com> > a Ãcrit :




Hi Martyn,







                Here is  what am doing inside my application :















  g_type_init();







  GError *error = NULL;







  m_connection = tracker_sparql_connection_get_direct(&error);







  qDebug() << error->message;







  if(m_connection != NULL)







  {







    gchar *query;







    query = g_strdup_printf ("SELECT ?url WHERE { ?song a



nmm:MusicPiece ; nie:isStoredAs ?as . ?as nie:url ?url . }");







    if(0 != query)







        m_cursor = tracker_sparql_connection_query (m_connection,



query, NULL, &error);







    else







        printf("Query is null \n");















    if(0 != error)







    {







        g_print("Error Message %s\n", error->message);







        //qDebug() << error->message;







        g_free (query);







    }







    else







        printf("No error returned from the SPARQL\n");















    if(0 != m_cursor)







        print_cursor (m_cursor, "No classes were found to match
search



term", "Classes", TRUE, l_list);







    else







        printf("cursor is NULL \n");







  }







  else







  {







    qDebug() << "connection not establisheds";







  }















-----Original Message-----



From: Martyn Russell [mailto:martyn lanedo com]



Sent: Thursday, August 04, 2011 6:53 PM



To: Suparno Bose (WT01 - Manufacturing & Hi Tech)



Cc: tracker-list gnome org



Subject: Re: [Tracker] Tracker-WARNING **: file is encrypted or is
not



a database















On 04/08/11 13:31, suparno bose wipro com
<mailto:suparno bose wipro com>



<mailto:suparno bose wipro com <mailto:suparno bose wipro com> >
wrote:







Attaching the file















Thanks,















-----Original Message-----







From: Suparno Bose (WT01 - Manufacturing&  Hi Tech)







Sent: Thursday, August 04, 2011 6:00 PM







To: 'Martyn Russell'







Cc: tracker-list gnome org <mailto:tracker-list gnome org>







Subject: RE: [Tracker] Tracker-WARNING **: file is encrypted or 

is


not











a database















Sorry Martyn ,







            I did some mistake. Please find my new log attached.







This time it worked fine from the command line but not from the







application .















I see, so how are you doing it form the application then? The
command



line tools are there to help you sanity check what you're
application



might be doing.















--







Regards,







Martyn















Founder and CEO of Lanedo GmbH.










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Philip Van Hoof
freelance software developer
Codeminded BVBA - http://codeminded.be
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