Re: [arc-dev] LOAD broken?
From: Will Daniels
Subject: Re: [arc-dev] LOAD broken?
Date: Sun, 06 Sep 2009 21:23:33 +0300
Interesting, the first line of my message here got chopped, which was:
"PS: I decided to create a bzr branch for any bug fixes I make in ARC:"
(I only mention in case there is a bug in whatever is handling the
mailing list...)
Will Daniels wrote:
>
> https://code.launchpad.net/~wdaniels/+junk/arc
>
> Regards,
> Will
>
> Will Daniels wrote:
>> 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
>>>
>
