You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@commons.apache.org by "Marco Brandizi (JIRA)" <ji...@apache.org> on 2017/11/23 11:12:00 UTC
[jira] [Updated] (COMMONSRDF-73) Jena module has Simple dependency,
SPI will never work
[ https://issues.apache.org/jira/browse/COMMONSRDF-73?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Marco Brandizi updated COMMONSRDF-73:
-------------------------------------
Description:
I'm trying to setup the RDF object one should use with Commons-RDF in a transparent way, using the SPI mechanism, ServiceLoader and META-INF/org.apache.commons.rdf.api.RDF.
This is the code I'm using:
{{
private synchronized static RDF getDefaultRdf ()
{
if ( defaultRdf != null ) return defaultRdf;
ServiceLoader<RDF> loader = ServiceLoader.load ( RDF.class );
Iterator<RDF> itr = loader.iterator();
if ( !itr.hasNext () ) throw new RdfException (
"No implementation found for Commons RDF, please, review your dependencies/classpath"
);
defaultRdf = itr.next();
if ( itr.hasNext () ) log.warn (
"More than one RDF instance available for Commons RDF, taking the first one ({})",
itr.next ().getClass ().getName ()
);
return defaultRdf;
}
}}
I've done a first test with the Jena module (commons-rdf-jena). SPI is broken by the fact this module also declares commons-rdf-simple as one of its dependencies. At least in Maven, the META-INF in commons-rdf-simple is the first that is met in the classpath and the simple implementation is the one that is picked by the code above, as reported by the warning. I expect the Jena implementation to be pulled up when I link the jena module as the only dependency.
Such dependency should be removed. I've given a look at the source files and it seem the simple module is only used for testing purposes (but physically is in the main code folders).
was:
I'm trying to setup the RDF object one should use with Commons-RDF in a transparent way, using the SPI mechanism, ServiceLoader and META-INF/org.apache.commons.rdf.api.RDF.
This is the code I'm using:
{quote}
private synchronized static RDF getDefaultRdf ()
{
if ( defaultRdf != null ) return defaultRdf;
ServiceLoader<RDF> loader = ServiceLoader.load ( RDF.class );
Iterator<RDF> itr = loader.iterator();
if ( !itr.hasNext () ) throw new RdfException (
"No implementation found for Commons RDF, please, review your dependencies/classpath"
);
defaultRdf = itr.next();
if ( itr.hasNext () ) log.warn (
"More than one RDF instance available for Commons RDF, taking the first one ({})",
itr.next ().getClass ().getName ()
);
return defaultRdf;
}
{quote}
I've done a first test with the Jena module (commons-rdf-jena). SPI is broken by the fact this module also declares commons-rdf-simple as one of its dependencies. At least in Maven, the META-INF in commons-rdf-simple is the first that is met in the classpath and the simple implementation is the one that is picked by the code above, as reported by the warning. I expect the Jena implementation to be pulled up when I link the jena module as the only dependency.
Such dependency should be removed. I've given a look at the source files and it seem the simple module is only used for testing purposes (but physically is in the main code folders).
> Jena module has Simple dependency, SPI will never work
> ------------------------------------------------------
>
> Key: COMMONSRDF-73
> URL: https://issues.apache.org/jira/browse/COMMONSRDF-73
> Project: Apache Commons RDF
> Issue Type: Bug
> Components: jena
> Affects Versions: 0.3.0
> Reporter: Marco Brandizi
>
> I'm trying to setup the RDF object one should use with Commons-RDF in a transparent way, using the SPI mechanism, ServiceLoader and META-INF/org.apache.commons.rdf.api.RDF.
> This is the code I'm using:
> {{
> private synchronized static RDF getDefaultRdf ()
> {
> if ( defaultRdf != null ) return defaultRdf;
>
> ServiceLoader<RDF> loader = ServiceLoader.load ( RDF.class );
> Iterator<RDF> itr = loader.iterator();
>
> if ( !itr.hasNext () ) throw new RdfException (
> "No implementation found for Commons RDF, please, review your dependencies/classpath"
> );
> defaultRdf = itr.next();
> if ( itr.hasNext () ) log.warn (
> "More than one RDF instance available for Commons RDF, taking the first one ({})",
> itr.next ().getClass ().getName ()
> );
>
> return defaultRdf;
> }
> }}
> I've done a first test with the Jena module (commons-rdf-jena). SPI is broken by the fact this module also declares commons-rdf-simple as one of its dependencies. At least in Maven, the META-INF in commons-rdf-simple is the first that is met in the classpath and the simple implementation is the one that is picked by the code above, as reported by the warning. I expect the Jena implementation to be pulled up when I link the jena module as the only dependency.
> Such dependency should be removed. I've given a look at the source files and it seem the simple module is only used for testing purposes (but physically is in the main code folders).
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)