IndexProvider provider = new LuceneIndexProvider( graphDb ); RelationshipIndex index = provider.relationshipIndex( "myIndex", LuceneIndexProvider.EXACT_CONFIG );
2010/8/16 Jeff Klann <jkl...@iupui.edu> > Hey I thought I'd try this out. Got the new kernel and downloaded the new > index component snapshot but can't figure out how to use it. Perhaps I'm > just dense. Looks like the only class in the Javadoc is an abstract class > so > I don't know how to instantiate a new relationship index. Have an example? > > Thanks, > Jeff Klann > > On Fri, Jul 30, 2010 at 10:19 AM, Mattias Persson < > matt...@neotechnology.com > > wrote: > > > The latest snapshots of things can be found at http://m2.neo4j.org/ > > and this component (jar-file) can be found in > > http://m2.neo4j.org/org/neo4j/neo4j-lucene-index/0.1-SNAPSHOT/ > > > > 2010/7/30, Arijit Mukherjee <ariji...@gmail.com>: > > > Thanx Mattias. Can I download a tar.gz or zip file from somewhere? I'm > > > not using Maven in my projects yet...I mean I'm not very comfortable > > > with it. > > > > > > Arijit > > > > > > On 30 July 2010 17:33, Mattias Persson <matt...@neotechnology.com> > > wrote: > > >> Looping through relatiomships manually is the way to go. However > > >> there's a new component in > > >> https://svn.neo4j.org/laboratory/components/lucene-index/ which can > > >> index relationships and do fast lookups on whether or not a > > >> relationship (with a certain attribute even) exists between two nodes. > > >> > > >> You'll need to go with the latest kernel then as well (as seen in > > >> https://svn.neo4j.org/laboratory/components/lucene-index/pom.xml). > > >> > > >> 2010/7/30, Arijit Mukherjee <ariji...@gmail.com>: > > >>> Hi All > > >>> > > >>> I have a requirement where I must check if there is an already > > >>> existing relationship between two nodes (say N1 and N2). Right now, > > >>> I'm doing it as follows: > > >>> > > >>> boolean found = false; > > >>> final Iterable<Relationship> currentRels = > > >>> N1.getRelationships(RelTypes.KNOWS, Direction.OUTGOING); > > >>> for (Relationship rel : currentRels) { > > >>> found = rel.getEndNode().equals(N2); > > >>> if (found) { > > >>> do something - like add some property to the existing > > >>> relationship; > > >>> break; > > >>> } > > >>> } > > >>> if (!found) { > > >>> create new relationship between N1 and N2; > > >>> } > > >>> > > >>> This means, for a high volume of data, all the relations going out of > > >>> N1 will be retrieved and checked - and this seems costly. I'm using > > >>> the 1.0 API, and wasn't able to find anything that would directly > > >>> check whether N1 has an outgoing relationship with N2 - like > > >>> N1.hasRelationship(N2, Direction.OUTGOING) - or something similar. I > > >>> think there was a similar mail sometime ago. Has there been any > > >>> updates lately which allows such checks? Or, is there any other > direct > > >>> way to do this with the 1.0 API? > > >>> > > >>> Regards > > >>> Arijit > > >>> > > >>> -- > > >>> "And when the night is cloudy, > > >>> There is still a light that shines on me, > > >>> Shine on until tomorrow, let it be." > > >>> _______________________________________________ > > >>> Neo4j mailing list > > >>> User@lists.neo4j.org > > >>> https://lists.neo4j.org/mailman/listinfo/user > > >>> > > >> > > >> > > >> -- > > >> Mattias Persson, [matt...@neotechnology.com] > > >> Hacker, Neo Technology > > >> www.neotechnology.com > > >> _______________________________________________ > > >> Neo4j mailing list > > >> User@lists.neo4j.org > > >> https://lists.neo4j.org/mailman/listinfo/user > > >> > > > > > > > > > > > > -- > > > "And when the night is cloudy, > > > There is still a light that shines on me, > > > Shine on until tomorrow, let it be." > > > _______________________________________________ > > > Neo4j mailing list > > > User@lists.neo4j.org > > > https://lists.neo4j.org/mailman/listinfo/user > > > > > > > > > -- > > Mattias Persson, [matt...@neotechnology.com] > > Hacker, Neo Technology > > www.neotechnology.com > > _______________________________________________ > > Neo4j mailing list > > User@lists.neo4j.org > > https://lists.neo4j.org/mailman/listinfo/user > > > _______________________________________________ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > -- Mattias Persson, [matt...@neotechnology.com] Hacker, Neo Technology www.neotechnology.com _______________________________________________ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
