Re: [arc-dev] LOAD broken?
From: Will Daniels
Subject: Re: [arc-dev] LOAD broken?
Date: Sun, 06 Sep 2009 17:28:56 +0300
Well, I debugged this and it turned out that the problem was since I
started using keep_bnode_ids = true in the query call. Which led me to a
line in runQuery that passes the call to runQuery on the
ARC2_StoreLoadQueryHandler class:
function runQuery($infos, $type, $keep_bnode_ids = 0, $q = '') {
ARC2::inc('Store' . ucfirst($type) . 'QueryHandler');
$cls = 'ARC2_Store' . ucfirst($type) . 'QueryHandler';
$h =& new $cls($this->a, $this);
$ticket = 1;
if ($q && ($type == 'select')) $ticket = $this->getQueueTicket($q);
** $r = $ticket ? $h->runQuery($infos, $keep_bnode_ids) : array();
if ($q && ($type == 'select')) $this->removeQueueTicket($ticket);
$trigger_r = $this->processTriggers($type, $infos);
return $r;
}
This seems to be mismatched with the actual parameters of that function:
function runQuery($infos, $data = '', $keep_bnode_ids = 0) {
....such that when $keep_bnode_ids = true, $data actually gets set
instead, and thus it is trying to read the wrong type of stream, does
not get any headers, hence no format identified, leading finally to the
"no loader available" error.
All seems to be working fine after fixing that.
Regards,
Will
Will Daniels wrote:
>
> Hi,
>
> Would somebody mind confirming for me whether LOAD is working properly
> in the latest ARC (bzr revision 8)? A simple example:
>
> LOAD <http://dbpedia.org/resource/Charles_Dickens>
>
> ....tells me...
>
> No loader available for "http://dbpedia.org/resource/Charles_Dickens":
> in ARC2_StoreLoadQueryHandler
>
> Same with all sites that I've tried. I started to debug this and found
> that it's not getting the format from the stream headers in
> ARC2_Reader::getFormat:
>
> $mtype = $this->v('format', '', $this->stream['headers']);
>
> Here, $this->stream['headers'] is just an empty array, so it doesn't get
> any MIME type etc. But it would take me quite some time to dig into all
> the code before this that actually reads the stream, so I just wanted to
> ask if anybody can confirm that it should be working, or if somebody
> knows of any obvious configuration mishap that might stop this working
> properly (it always used to work fine when I was last playing with ARC,
> and I'm sure I didn't change anything except to update the ARC code with
> the latest version).
>
> Thanks,
> Will
>
