Re: [Neo] Instances of meta model
I just committed a fix for this. Wow, that was quick, if you don't mind my saying so ;) If you're using maven a new version of the meta-model component (version 0.8-SNAPSHOT) will be available within an hour from now. Please come back with feedback if something isn't working as you'd expect or if you have more feature requests. FYI: the method MetaModelClass#getInstances() is split into #getDirectInstances() and #getAllInstances() so that it adds this functionality and also adheres to the convention found in the meta model. / Mattias 2010/3/12 Mattias Persson matt...@neotechnology.com: Hi Niels, You're absolutely right. I'll see if I can whip up a nice method for that! 2010/3/10 Niels Hoogeveen pd_aficion...@hotmail.com: I just started working with Neo4J and created a meta model for the nodes and relationships I am adding. When retrieving the instances of a Class, I only get those nodes I have explicitly added to the collection of class instances, but not the ones that are only added to the collection of a sub-class. Example: MetaModelClass thing = namespace.getMetaClass( thing, true ); MetaModelClass person = namespace.getMetaClass( person, true ); thing.getDirectSubs().add( person ) Node pers = db.createNode() person.getInstances.add(pers) When asking for the instances of person the node pers is found within the collection, when asking for instances of thing this node is not found. It would be nice if the instances of thing would contain the nodes added to the person collection, greatly reducing the number of redundant relationships, and allowing for a more flexible evolution of the meta schema. Niels Hoogeveen ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] Delete nodes
Hi Miguel,
contacted you off-list - I think we should Skype and guide guide you
through configuration etc. and see how the docs can be improved to
clarify some of the issues. Probably saves a lot of mails and we will
publish the results to the wiki/list for others to share.
Cheers,
/peter neubauer
COO and Sales, Neo Technology
GTalk: neubauer.peter
Skype peter.neubauer
Phone +46 704 106975
LinkedIn http://www.linkedin.com/in/neubauer
Twitter http://twitter.com/peterneubauer
http://www.neo4j.org - Your high performance graph database.
http://www.tinkerpop.com - Processing for Internet-scale graphs.
http://www.thoughtmade.com - Scandinavias coolest Bring-a-Thing party.
2010/3/12 Miguel Ángel Águila magu...@ac.upc.edu:
Hello,
I'm doing an operation for deleting nodes, the database has 56.876.085
nodes and 321.393.972 edges. I'm deleting 4.495.136 nodes and 39.894.943
edges, and I'm a little worry about the time that the operation spends.
After one day executing the operation it only has delete 200.000 nodes,
I don't know if I'm doing something wrong. Using 40 GB RAM I need to
finish the transaccion every 10.000 nodes delete because in other case I
have the following error:
Exception in thread main java.lang.OutOfMemoryError: Java heap space
at java.util.HashMap.resize(HashMap.java:462)
at java.util.HashMap.addEntry(HashMap.java:755)
at java.util.HashMap.put(HashMap.java:385)
at
org.neo4j.kernel.impl.transaction.LockManager.getWriteLock(LockManager.java:118)
at
org.neo4j.kernel.impl.nioneo.xa.NeoTransaction.getWriteLock(NeoTransaction.java:785)
at
org.neo4j.kernel.impl.nioneo.xa.NeoTransaction.disconnectRelationship(NeoTransaction.java:758)
at
org.neo4j.kernel.impl.nioneo.xa.NeoTransaction.relDelete(NeoTransaction.java:662)
at org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaConnection
$RelationshipEventConsumerImpl.deleteRelationship(NeoStoreXaConnection.java:249)
at org.neo4j.kernel.impl.nioneo.xa.NioNeoDbPersistenceSource
$NioNeoDbResourceConnection.relDelete(NioNeoDbPersistenceSource.java:350)
at
org.neo4j.kernel.impl.persistence.PersistenceManager.relDelete(PersistenceManager.java:149)
at
org.neo4j.kernel.impl.core.NodeManager.deleteRelationship(NodeManager.java:816)
at
org.neo4j.kernel.impl.core.RelationshipImpl.delete(RelationshipImpl.java:162)
at
org.neo4j.kernel.impl.core.RelationshipProxy.delete(RelationshipProxy.java:44)
at edu.upc.dama.dex.loader.Queries.delTitles(Queries.java:780)
at edu.upc.dama.dex.loader.TestBenchmark.main(TestBenchmark.java:70)
May be the problem is the transaction take a lot of time.
I let here the code for somebody can help me.
public static void delTitles(final EmbeddedGraphDatabase neo, final
IndexService indexService) {
Node idNode;
Node first;
Node second;
IndexHitsNode nodes;
IteratorNode it;
Transaction tx = neo.beginTx();
try
{
nodes = indexService.getNodes(#images, 0);
it = nodes.iterator();
int counter=0;
IteratorRelationship relIterator;
Relationship rel;
while ((it.hasNext())) {
idNode=it.next();
relIterator = idNode.getRelationships().iterator();
while (relIterator.hasNext()) {
rel = relIterator.next();
rel.delete();
}
if ( ++counter % 1 == 0 ) {
tx.success();
tx.finish();
tx = neo.beginTx();
System.out.println(Porta+counter);
}
indexService.removeIndex(idNode,ID_TITLE,idNode.getProperty(ID_TITLE));
indexService.removeIndex(idNode,NLC,idNode.getProperty(NLC));
indexService.removeIndex(idNode,TYPE,1);
indexService.removeIndex(idNode,#images,0);
idNode.delete();
}
tx.success();
tx.finish();
tx = neo.beginTx();
System.out.println(Nodes del +counter);
tx.success();
}
finally
{
tx.finish();
}
}
Thank you very much.
Mike
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[Neo] How to cite Neo4j?
Hi, I'm using Neo4j in my research thesis as a great data store. How can I cite it?, I can't find any research paper that represent Neo4j. If one available, let me know. Kind regards, Amir ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo] Connecting to Neo4j DB from ActionScript
Hi, Is it possible to connect a Neo4j instance using ActionScript and Adobe Flex?! Thanks. ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] Connecting to Neo4j DB from ActionScript
Hi Amir, I used GSON (google's json package) on the Neo side and Flex's json AS3 classes to make the connection. -Todd On Fri, Mar 12, 2010 at 4:31 PM, Amir Hossein Jadidinejad amir.jad...@yahoo.com wrote: Hi, Is it possible to connect a Neo4j instance using ActionScript and Adobe Flex?! Thanks. ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] Connecting to Neo4j DB from ActionScript
Dear Todd, I'm not familiar with them. Would you please provide me a simple how-to or some source code example? In fact, I'm going to visualise the Neo4j DB using FlexViz. It's really beautiful and flexible. Thanks. Amir --- On Fri, 3/12/10, Todd Stavish toddstav...@gmail.com wrote: From: Todd Stavish toddstav...@gmail.com Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript To: Neo user discussions user@lists.neo4j.org Date: Friday, March 12, 2010, 4:43 PM Hi Amir, I used GSON (google's json package) on the Neo side and Flex's json AS3 classes to make the connection. -Todd On Fri, Mar 12, 2010 at 4:31 PM, Amir Hossein Jadidinejad amir.jad...@yahoo.com wrote: Hi, Is it possible to connect a Neo4j instance using ActionScript and Adobe Flex?! Thanks. ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] Connecting to Neo4j DB from ActionScript
Amir, I'm doing something similar (also with Flexviz). I looked at a number of other Flex graph visualization libraries (Kapit, SpringGraph, YFiles, Raviz/Birdeye, Flare) and definitely preferred Flexviz to the others. It seems quite extensible/customizable as well. I'm using Flex/Flash remoting between the server and the client, and on the server side, I'm using WebORB Java. Rick -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Amir Hossein Jadidinejad Sent: Friday, March 12, 2010 5:10 PM To: Neo user discussions Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript Dear Todd, I'm not familiar with them. Would you please provide me a simple how-to or some source code example? In fact, I'm going to visualise the Neo4j DB using FlexViz. It's really beautiful and flexible. Thanks. Amir --- On Fri, 3/12/10, Todd Stavish toddstav...@gmail.com wrote: From: Todd Stavish toddstav...@gmail.com Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript To: Neo user discussions user@lists.neo4j.org Date: Friday, March 12, 2010, 4:43 PM Hi Amir, I used GSON (google's json package) on the Neo side and Flex's json AS3 classes to make the connection. -Todd On Fri, Mar 12, 2010 at 4:31 PM, Amir Hossein Jadidinejad amir.jad...@yahoo.com wrote: Hi, Is it possible to connect a Neo4j instance using ActionScript and Adobe Flex?! Thanks. ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] Connecting to Neo4j DB from ActionScript
Dear Rick, It's really interesting. Would you please share your experiments with us?, Some example, source code,... Greatly appreciate your help. Kind regards, Amir --- On Fri, 3/12/10, Rick Bullotta rick.bullo...@burningskysoftware.com wrote: From: Rick Bullotta rick.bullo...@burningskysoftware.com Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript To: 'Neo user discussions' user@lists.neo4j.org Date: Friday, March 12, 2010, 6:27 PM Amir, I'm doing something similar (also with Flexviz). I looked at a number of other Flex graph visualization libraries (Kapit, SpringGraph, YFiles, Raviz/Birdeye, Flare) and definitely preferred Flexviz to the others. It seems quite extensible/customizable as well. I'm using Flex/Flash remoting between the server and the client, and on the server side, I'm using WebORB Java. Rick -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Amir Hossein Jadidinejad Sent: Friday, March 12, 2010 5:10 PM To: Neo user discussions Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript Dear Todd, I'm not familiar with them. Would you please provide me a simple how-to or some source code example? In fact, I'm going to visualise the Neo4j DB using FlexViz. It's really beautiful and flexible. Thanks. Amir --- On Fri, 3/12/10, Todd Stavish toddstav...@gmail.com wrote: From: Todd Stavish toddstav...@gmail.com Subject: Re: [Neo] Connecting to Neo4j DB from ActionScript To: Neo user discussions user@lists.neo4j.org Date: Friday, March 12, 2010, 4:43 PM Hi Amir, I used GSON (google's json package) on the Neo side and Flex's json AS3 classes to make the connection. -Todd On Fri, Mar 12, 2010 at 4:31 PM, Amir Hossein Jadidinejad amir.jad...@yahoo.com wrote: Hi, Is it possible to connect a Neo4j instance using ActionScript and Adobe Flex?! Thanks. ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo] Javascript/JSON binding?
Hi, I'm new to this mailling list. I just wondered if there was a Javascript/JSON binding for Neo4j which made the database available to NodeJS. This could done as: 1. a C++ NodeJS plugin 2. JSON objects over TCP 3. JSON objects over HTTP (less efficient, could be extended for browser-side with auth, transaction/session issues) 4. JSON objects over HTML5 websockets (though I don't think NodeJS has a websockets CLIENT yet) Any thoughts? Chris. -- http://www.finalcog.com/ ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
