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https://issues.apache.org/jira/browse/JENA-63?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13028743#comment-13028743
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Paolo Castagna edited comment on JENA-63 at 5/4/11 1:53 PM:
------------------------------------------------------------
To enable and use LARQ from Fuseki, simply point to the Lucene index location
using ja:textIndex property:
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix ja: <http://jena.hpl.hp.com/2005/11/Assembler#> .
@prefix tdb: <http://jena.hpl.hp.com/2008/tdb#> .
[] ja:loadClass "com.hp.hpl.jena.tdb.TDB" .
tdb:DatasetTDB rdfs:subClassOf ja:RDFDataset .
tdb:GraphTDB rdfs:subClassOf ja:Model .
<#dataset> rdf:type tdb:DatasetTDB ;
tdb:location "/path/to/tdb/indexes/" ;
ja:textIndex "/path/to/lucene/index/" ;
.
Also, I think there is a bug in FusekiCmd which cases the assembler code to
initialize a Dataset twice. This causes problems with Lucene which is failing
to lock the index directory the second time.
Index: src/main/java/org/openjena/fuseki/FusekiCmd.java
===================================================================
--- src/main/java/org/openjena/fuseki/FusekiCmd.java (revision 8763)
+++ src/main/java/org/openjena/fuseki/FusekiCmd.java (working copy)
@@ -183,12 +183,6 @@
throw new CmdException(argPort.getKeyName()+" : bad port
number: "+portStr) ;
}
}
- else
- {
- Dataset ds = modDataset.createDataset() ;
- if ( ds != null )
- dsg = ds.asDatasetGraph() ;
- }
if ( dsg == null )
throw new CmdException("No dataset defined: "+argUsage) ;
was (Author: castagna):
To enable and use LARQ from Fuseki, simply point to the Lucene index
location using ja:textIndex property:
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix ja: <http://jena.hpl.hp.com/2005/11/Assembler#> .
@prefix tdb: <http://jena.hpl.hp.com/2008/tdb#> .
[] ja:loadClass "com.hp.hpl.jena.tdb.TDB" .
tdb:DatasetTDB rdfs:subClassOf ja:RDFDataset .
tdb:GraphTDB rdfs:subClassOf ja:Model .
<#dataset> rdf:type tdb:DatasetTDB ;
tdb:location "/path/to/tdb/indexes/" ;
ja:textIndex "/path/to/lucene/index/" ;
.
> Add LARQ to TBD and Fuseki
> --------------------------
>
> Key: JENA-63
> URL: https://issues.apache.org/jira/browse/JENA-63
> Project: Jena
> Issue Type: Improvement
> Components: Fuseki, LARQ, TDB
> Reporter: Paolo Castagna
> Attachments: TDB-r8763.patch
>
>
> It is possible (although not easy for users) to use LARQ with TDB and Fuseki.
> This is to make possible and easy to use LARQ with TDB datasets and with
> Fuseki.
> One way to achieve this is to improve DatasetAssemblerTDB in TDB as suggested
> by http://markmail.org/thread/r5phyiuqkqsyi2xc. This way, LARQ will be loaded
> and wired into ARQ if present in the classpath. Uses will need just to add
> the LARQ jar to their classpath (or depend on it if they use Maven).
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