Rob/Andy - thanks!
I'm not sure if I made this clear ... My query does work fine as long as I
don't include "FILTER"; I'm able to get back a select ?s ?p ?o {?s ?p ?o} with
no issues from the driver
I did just try the latest snapshot bundle jar, unfortunately... If I include
FILTER regex(?var,"value")
I still get:
Caused by: java.lang.NoClassDefFoundError: Could not initialize class
org.apache.jena.sparql.expr.NodeValue
I don't believe Teiid is doing any repackaging, and I'm also confused if I
include the individual jar files it won't work ..
Anything else I could try to troubleshoot this? I'm at a loss
-----Original Message-----
From: Rob Vesse [mailto:[email protected]]
Sent: Wednesday, November 02, 2016 6:00 AM
To: [email protected]
Subject: Re: JDBC in Teiid/JBoss NodeValue / ClassNotFounderror
They seem to be conflating two different things here
We do use and support Standard JDBC Driver initialisation. We also use the
same underlying Java mechanism i.e. ServiceLoader to initialise Jena itself.
Our JDBC driver initialisation invokes our Jena initialisation. So as far as
we’re concerned we are not doing anything wrong:
https://github.com/apache/jena/blob/master/jena-jdbc/jena-jdbc-driver-remote/src/main/java/org/apache/jena/jdbc/remote/RemoteEndpointDriver.java#L178
https://github.com/apache/jena/blob/master/jena-jdbc/jena-jdbc-driver-tdb/src/main/java/org/apache/jena/jdbc/tdb/TDBDriver.java#L95
https://github.com/apache/jena/blob/master/jena-jdbc/jena-jdbc-driver-mem/src/main/java/org/apache/jena/jdbc/mem/MemDriver.java#L90
As Andy has pointed out there was a bug in how the bundle JAR with all the
drivers was being created which meant that Jena initialisation wasn’t happening
properly because the composites services file for Jena initialisers wasn’t
being created properly. If you use the latest 3.1.1-SNAPSHOT builds then this
is resolved.
lists.apache.org provides a much more modern interface to our mailing lists
Rob
On 02/11/2016 03:10, "[email protected]" <[email protected]>
wrote:
Hi Andy - further info from Ramesh ; thanks for your patience - he was
having access accessing /reading MarkMail - so I'm relaying (original from
bottom of https://developer.jboss.org/thread/272656) :
"Basically what they need to do, replace their ServiceLoader mechanism with
standard JDBC4 ServiceLoader mechanism like
https://github.com/rareddy/teiid/tree/master/client/src/main/resources/META-INF/services
That will register their Driver class, and in their driver class possibly
in a "static block" call ARQ.init() that will initialize every time one uses
their JDBC driver. "
-----Original Message-----
From: Andy Seaborne [mailto:[email protected]]
Sent: Tuesday, November 01, 2016 12:10 PM
To: [email protected]
Subject: Re: JDBC in Teiid/JBoss NodeValue / ClassNotFounderror
On 01/11/16 14:54, [email protected] wrote:
> Thanks Andy!
>
> Question - who is responsible for loading the JDBC driver, and how does
one load it?
>
> I'm not clear on exact details on how to get it to work. I reached out to
the Teiid team, and Ramesh has a question for you .
>
> Can you look at the bottom of this thread for the question from Ramesh?
>
> https://developer.jboss.org/thread/272656
Firstly - I didn't write and don't use jena-jdbc so my level of expertise
is limited. The initialization of Jena in shaded jars is something that has
come up before.
It looks like the problem is at the Jena initialization step, not the
loading the JDBC driver. That's supposed to be automatic and is - the crash
happens because the initialization is incomplete or is happening in the wrong
order because the normal sequence isn't happening.
In yoru code, if you can, call ARQ.init() before anything else. Calling it
repeatedly is safe and cheap.
Hopefully RobV can give a better answer for the JDBC aspects.
There is a services/java.sql.Driver - that should cause the JDBC driver to
load. Standard way for Java.
Andy
>
>
> -----Original Message-----
> From: Andy Seaborne [mailto:[email protected]]
> Sent: Tuesday, November 01, 2016 5:49 AM
> To: [email protected]
> Subject: Re: JDBC in Teiid/JBoss NodeValue / ClassNotFounderror
>
>
>> I checked and the jena-jdbc-driver-bundle does not set up the
>> ServiceLoader services correctly. We'll fix that.
>
> jena-jdbc-driver-bundle should be fixed (JENA-1255) now. There is a
development with it in.
>
> Andy
>
>>
>> But I don't immediately see why using the jars directly does not
>> work, but that's due to my lack of knowledge about Teiid and JBoss.
>>
>> Is there any repackaging going on?
>>
>> Andy
>
