Nikolaos Abatzis wrote:
All:
I just did a check on the 2.6.4 Jena bundle and I see that even the latest ARQ
(2.8.7) seems to use the lucene-core-2.3.1.
Are there any plans to port ARQ so that it uses a more recent version of
Lucene. 2.3.1 is kind of ancient, current in the 2.x series is 2.9.4
and my understanding is that it uses Java 1.4. There is also a 3.x series that uses Java 1.5. per the lucene docs, the latest versions offer
significant enhancements and have fixed memory leaks, etc...
"Lucene 2.3.1 is kind of ancient", I agree. :-)
Yes, the plan is to extract LARQ as a separate module (which will depend on
ARQ).
You can look here: https://jena.svn.sourceforge.net/svnroot/jena/LARQ/trunk/
As you can see, it is using Lucene 3.0.3 (and it is backward compatible with
2.9.x
... as just a drop-in replacement if somebody needs an older version of Lucene).
We are currently waiting the "all clear" to move source code from SourceForge
to the
Apache SVN repository. Once we do that, little changes are necessary in the ARQ
source code to dynamically look for LARQ and wiring it in (if present in the
class
path).
The LARQ separate module has already a few improvements (i.e. avoiding
duplicates
with subsequents updates and removals).
Still pending:
- a way to support RDF Datasets in addition to Jena Models and proper
assemblers.
- a tool to make it easier to build Lucene indexes pointing to a TDB location.
- (at one point, I'd like to see LARQ in Fuseki ;-))
Later:
- Solr? https://github.com/castagna/SARQ
- ElasticSearch? https://github.com/castagna/EARQ
To checkout LARQ and compile it type:
svn co https://jena.svn.sourceforge.net/svnroot/jena/LARQ/trunk/ LARQ
cd LARQ
mvn package
Let me know if you have problems,
Paolo
Please do not hesitate to contact me if you need additional information. Thank
you.
Regards,
Nikolaos Abatzis
New River Systems Corporation
1890 Preston White Drive, Suite 240
Reston, VA 20191
