Re: [Neo4j] Fetching Nodes from Graph Database(which was created earlier)
Karthik,
that is a very valid point. There are plans to produce a
tutorial-style one-stop documentation, it has just not gotten underway
yet. If you have input on topics to cover, I would be most interested
to get a little table of content from you so we can do a better job
when the community gets to it!
Thanks for your time,
Cheers,
/peter neubauer
GTalk: neubauer.peter
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On Wed, Feb 2, 2011 at 2:35 PM, karthik aithal wrote:
> Thanks for your reply. It resolved my problem.
>
> I think it is a basic question. But I found very difficult to find solution
> online. So can you please provide any consolidated user guide to use
> Neo4j(other than doc/videos in neo4j sites)?
>
> Thanks,
> Karthik
> On Wed, Feb 2, 2011 at 6:12 PM, Mattias Persson
> wrote:
>
>> You mean copy nodes from one database to another? You can bring up two
>> EmbeddedGraphDatabase instances, pointing to two different locations, and
>> start getting nodes/relationships from one and creating them (not just
>> adding) in the other.
>>
>> GraphDatabaseService gDB1 = new
>> EmbeddedGraphDatabase("/NeoDB/store/db");
>> GraphDatabaseService gDB2 = new EmbeddedGraphDatabase("target/db");
>>
>> for ( Node sourceNode : gDB1.getAllNodes() )
>> {
>> // Insert the contents of that node in gDB2
>> }
>>
>> 2011/2/2 karthik aithal
>>
>> > Hi,
>> >
>> > I am biginner to Neo4j and eager to learn more about it. I am aware
>> > of creating new Graph database with 1k to 10k nodes and relationship and
>> > was
>> > successfully traverse to specific nodes. But currently I am facing
>> > difficult
>> > to get node from existing graph DB and traverse to specific node in that
>> > DB.
>> >
>> > For creating new Graph DB I am using:
>> >
>> > GraphDatabaseService gDB = new EmbeddedGraphDatabase("target/db");
>> >
>> > So, if I have 10k nodes(with relationship) in Path: "/NeoDB/store/db"
>> then
>> > how can I retrive nodes from this DB?
>> >
>> > Thanks for your help in advance,
>> >
>> > Karthik
>> > ___
>> > 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
>>
> ___
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>
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Re: [Neo4j] Fetching Nodes from Graph Database(which was created earlier)
Thanks for your reply. It resolved my problem.
I think it is a basic question. But I found very difficult to find solution
online. So can you please provide any consolidated user guide to use
Neo4j(other than doc/videos in neo4j sites)?
Thanks,
Karthik
On Wed, Feb 2, 2011 at 6:12 PM, Mattias Persson
wrote:
> You mean copy nodes from one database to another? You can bring up two
> EmbeddedGraphDatabase instances, pointing to two different locations, and
> start getting nodes/relationships from one and creating them (not just
> adding) in the other.
>
>GraphDatabaseService gDB1 = new
> EmbeddedGraphDatabase("/NeoDB/store/db");
>GraphDatabaseService gDB2 = new EmbeddedGraphDatabase("target/db");
>
>for ( Node sourceNode : gDB1.getAllNodes() )
>{
> // Insert the contents of that node in gDB2
>}
>
> 2011/2/2 karthik aithal
>
> > Hi,
> >
> > I am biginner to Neo4j and eager to learn more about it. I am aware
> > of creating new Graph database with 1k to 10k nodes and relationship and
> > was
> > successfully traverse to specific nodes. But currently I am facing
> > difficult
> > to get node from existing graph DB and traverse to specific node in that
> > DB.
> >
> > For creating new Graph DB I am using:
> >
> > GraphDatabaseService gDB = new EmbeddedGraphDatabase("target/db");
> >
> > So, if I have 10k nodes(with relationship) in Path: "/NeoDB/store/db"
> then
> > how can I retrive nodes from this DB?
> >
> > Thanks for your help in advance,
> >
> > Karthik
> > ___
> > 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
>
___
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Re: [Neo4j] Fetching Nodes from Graph Database(which was created earlier)
Karthik,
You can index the nodes you are interested in as start and/or end-nodes of your
traversal and then retrieve them via the index.
// to add them
gDB.index().forNodes("indexName").add(node,"key","value");
nodeIndex.get("key","value") returns an IndexHits that you can iterate
over or use getSingle() to retrieve a single matching node.
See also:
http://wiki.neo4j.org/content/Index_Framework
Other ways of accessing nodes in the db are getById() or traversal using the
traversal framework
or manual traversal starting from the reference node (gDB.getReferenceNode())
that you should connect your graph to.
Cheers
Michael
Am 02.02.2011 um 13:34 schrieb karthik aithal:
> Hi,
>
> I am biginner to Neo4j and eager to learn more about it. I am aware
> of creating new Graph database with 1k to 10k nodes and relationship and was
> successfully traverse to specific nodes. But currently I am facing difficult
> to get node from existing graph DB and traverse to specific node in that DB.
>
> For creating new Graph DB I am using:
>
> GraphDatabaseService gDB = new EmbeddedGraphDatabase("target/db");
>
> So, if I have 10k nodes(with relationship) in Path: "/NeoDB/store/db" then
> how can I retrive nodes from this DB?
>
> Thanks for your help in advance,
>
> Karthik
> ___
> Neo4j mailing list
> User@lists.neo4j.org
> https://lists.neo4j.org/mailman/listinfo/user
___
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Re: [Neo4j] Fetching Nodes from Graph Database(which was created earlier)
You mean copy nodes from one database to another? You can bring up two
EmbeddedGraphDatabase instances, pointing to two different locations, and
start getting nodes/relationships from one and creating them (not just
adding) in the other.
GraphDatabaseService gDB1 = new
EmbeddedGraphDatabase("/NeoDB/store/db");
GraphDatabaseService gDB2 = new EmbeddedGraphDatabase("target/db");
for ( Node sourceNode : gDB1.getAllNodes() )
{
// Insert the contents of that node in gDB2
}
2011/2/2 karthik aithal
> Hi,
>
> I am biginner to Neo4j and eager to learn more about it. I am aware
> of creating new Graph database with 1k to 10k nodes and relationship and
> was
> successfully traverse to specific nodes. But currently I am facing
> difficult
> to get node from existing graph DB and traverse to specific node in that
> DB.
>
> For creating new Graph DB I am using:
>
> GraphDatabaseService gDB = new EmbeddedGraphDatabase("target/db");
>
> So, if I have 10k nodes(with relationship) in Path: "/NeoDB/store/db" then
> how can I retrive nodes from this DB?
>
> Thanks for your help in advance,
>
> Karthik
> ___
> 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
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[Neo4j] Fetching Nodes from Graph Database(which was created earlier)
Hi,
I am biginner to Neo4j and eager to learn more about it. I am aware
of creating new Graph database with 1k to 10k nodes and relationship and was
successfully traverse to specific nodes. But currently I am facing difficult
to get node from existing graph DB and traverse to specific node in that DB.
For creating new Graph DB I am using:
GraphDatabaseService gDB = new EmbeddedGraphDatabase("target/db");
So, if I have 10k nodes(with relationship) in Path: "/NeoDB/store/db" then
how can I retrive nodes from this DB?
Thanks for your help in advance,
Karthik
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