Re: [Neo4j] Embedded or Standalone?
Aman, Generally speaking the embeddded use of Neo4j is fase since there is no network serialization overhead -the database runs in-process and is thus much faster. However, the core engine in both versions is the same so how big the network penalty is depends very much on your domain and use case . /Peter On Monday, August 29, 2011, Amandeep Jakhu wrote: > > Which method of using Neo4j is faster - Embedded or Standalone? > > -- > Aman > > ___ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > -- Cheers, /peter neubauer 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://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] Embedded or Standalone?
Which method of using Neo4j is faster - Embedded or Standalone? -- Aman ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] API adventures in Scalaland
Niels,
Is that Scala code in the graph collections? If you want, ,you could use the
neo4j/neoviz project to output .dot graphs at any point and thus visualize
what's happening in the graph to illustrate :)
/Peter
On Monday, August 29, 2011, Niels Hoogeveen
wrote:
>
> In the last week I have been working on a Neo4j API in Scala, taking
navigation in the graph as primary.
>
> Just like the Enhanced API written in Java, the Scala API generalizes each
element (Node, Relationship, RelationshipType, property name and property
value) of the Neo4j database as being a Vertex.
>
> Before digging into the details of the Scala API, let's start with some
example code.
>
>val name = Db(String("name"))
>val friend = Db(VertexOut("FRIEND"))
>val john = Db(NewVertex).put(name, "John")
>val pete = Db(NewVertex).put(name, "Pete").put(friend, john)
>
> This piece of code defines the PropertyType "name" and the EdgeTypes
"FRIEND", creates two vertices for the persons "John" and "Pete", and states
that John is a friend of Pete.
>
> In standard Neo4j API this could have been written as:
>
> Node john = db.createNode();
> Node pete = db.createNode();
> john.setProperty("name", "John");
> pete.setProperty("name", "Pete");
> pete.createRelationshipTo(john,
DynamicRelationshipType.withName("FRIEND"));
>
> Apart from an obvious style difference, there is one immediate difference
noticeable between the two API's.
>
> In the Neo4j API it is possible to write:
>
> john.setProperty("name", "John");
> pete.setProperty("name", 99);
>
> While the following Scala program won't typecheck:
>
> pete.put(name, 99) //ERROR
>
> The "name" property is defined as a String and the API enforces that type.
This also applies when fetching a property value. In the Neo4j API we write:
>
> john.getProperty("name") // returns java.lang.Object
>
> In the Scala API we write:
>
> john(name) // returns java.lang.String
>
> It is also possible to ask the names of pete's friend as follows:
>
> pete(friend andThen name)
>
> This is equal to the Neo4j call:
>
>
(String)pete.getSingleRelationship(DynamicRelationshipType.withName("FRIEND"),
Direction.OUTGOING).endNode.getProperty("name")
>
> If pete has more than one friend, we have to define a different key to
fetch them ( the VertexOut key refers to one single relationship, either the
one to be created, or a singular exisiting relationship ):
>
> val friends = Db(Vertices("FRIEND"))
>
> We now have a key to all "FRIEND" relationships so we can ask:
>
> pete(friends andThen name)
>
> This returns an Iterable[String] with the names of all Pete's friends.
>
> We can even do:
>
> pete(Rec(friends) andThen name)
>
> This returns an Iterable[String] with the names of all Pete's friends of
friends (to the n-th degree). The Rec object recursively applies "friend" to
all vertices it traverses, remembering already taken paths, traversed
Relationships or traversed Nodes (settings are optional with sensible
defaults).
>
> We can also write:
>
> pete(Rec(friend, 2) andThen name)
>
> This returns an Iterable[String] with the names of all Pete's friends of
friends (to the 2nd degree)
>
> It is even possible to write:
>
> pete(Rec(friend andThen friend) andThen name)
>
> This returns an Iterable[String] with the names of all Pete's friends of
friends (to the n-th degree where n is even)
>
> Instead of having get methods for properties and relationships and
traversal methods on nodes, the Scala API uses one calling pattern for all
database related objects:
>
> object(traverser)
>
> So a call like Db(String("name")) is not just a call on the database to
return a PropertyType with name "name" and datatype String, it is a
traversal from the database to that PropertyType. What is being returned
with that call is a traverser itself.
>
> Traversers can be composed with "andThen", so the output of one traverser
is used as input for the next traverser.
>
> All traversers are typed, so the "andThen" connective can only be applied
when the type of the output of the left-hand-side traverser is equal to the
type as the input of the right-hand-side traverser. This is checked at
compile time.
>
> Traversals not only work on Vertex objects and it's subtypes (Property,
PropertyType, Edge, EdgeType...), it also works on Iterable[Vertex].
>
> Instead of fetching just pete's friends, as in:
>
> pete(friends)
>
> we can also fetch the friends of pete and john:
>
> val frnds = List(pete, john)
> frnds(friends)
>
> or if we don't need the "frnds" object later on, we simply state:
>
> List(pete, john)(friends)
>
> and if we want the names of those friends:
>
> List(pete, john)(friends andThen name)
>
> it is even possible to set properties or create relationships on
Iterable[Vertex]
>
> val age = Db(Int("age"))
> val nationality = Db(String("nationality"))
> List(pete, john).put(age, 40).put(nationality, "Irish")
>
> This sets the "age" property to 40 on both "pete" and "john".
>
> It is also possible to write this
Re: [Neo4j] Neo4j .Net Api - Indexing
The Package and Source Code is now officially available here: http://nuget.org/List/Packages/Neo4jClient Source Code at: http://hg.readify.net/neo4jclient/ -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Tatham Oddie Sent: Sunday, 28 August 2011 8:14 PM To: Neo4j user discussions Subject: Re: [Neo4j] Neo4j .Net Api - Indexing Hi Peter, The client library is on NuGet: http://nuget.org/List/Packages/Neo4jClient.Edge (NuGet is .NET's package manager.) The source code is up at http://hg.tath.am/neo4jclient I haven't pushed it to GitHub yet because of a bug in Dulwich affecting my version of Hg-Git. (Empty repo at https://github.com/tathamoddie/Neo4jClient where it'll go eventually.) -- Tatham -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Peter Neubauer Sent: Sunday, 28 August 2011 5:55 PM To: Neo4j user discussions Subject: Re: [Neo4j] Neo4j .Net Api - Indexing Romiko, Nice writeup! Do you have the link to the full project for people to try? Is it on GIThub for people to try? /peter On Sunday, August 28, 2011, Romiko Derbynew wrote: > Hi Guys, > > I have written a blog on using our .Net Api for indexes in .Net, so > any .Net dudes out there might want to give it a bash, look forward hearing feedback. > > http://romikoderbynew.com/2011/08/28/lucene-full-text-indexing-with-ne > o4j/ > > Cheers > > ___ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > -- Cheers, /peter neubauer 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://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. ___ 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 ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] API adventures in Scalaland
In the last week I have been working on a Neo4j API in Scala, taking navigation
in the graph as primary.
Just like the Enhanced API written in Java, the Scala API generalizes each
element (Node, Relationship, RelationshipType, property name and property
value) of the Neo4j database as being a Vertex.
Before digging into the details of the Scala API, let's start with some example
code.
val name = Db(String("name"))
val friend = Db(VertexOut("FRIEND"))
val john = Db(NewVertex).put(name, "John")
val pete = Db(NewVertex).put(name, "Pete").put(friend, john)
This piece of code defines the PropertyType "name" and the EdgeTypes "FRIEND",
creates two vertices for the persons "John" and "Pete", and states that John is
a friend of Pete.
In standard Neo4j API this could have been written as:
Node john = db.createNode();
Node pete = db.createNode();
john.setProperty("name", "John");
pete.setProperty("name", "Pete");
pete.createRelationshipTo(john, DynamicRelationshipType.withName("FRIEND"));
Apart from an obvious style difference, there is one immediate difference
noticeable between the two API's.
In the Neo4j API it is possible to write:
john.setProperty("name", "John");
pete.setProperty("name", 99);
While the following Scala program won't typecheck:
pete.put(name, 99) //ERROR
The "name" property is defined as a String and the API enforces that type. This
also applies when fetching a property value. In the Neo4j API we write:
john.getProperty("name") // returns java.lang.Object
In the Scala API we write:
john(name) // returns java.lang.String
It is also possible to ask the names of pete's friend as follows:
pete(friend andThen name)
This is equal to the Neo4j call:
(String)pete.getSingleRelationship(DynamicRelationshipType.withName("FRIEND"),
Direction.OUTGOING).endNode.getProperty("name")
If pete has more than one friend, we have to define a different key to fetch
them ( the VertexOut key refers to one single relationship, either the one to
be created, or a singular exisiting relationship ):
val friends = Db(Vertices("FRIEND"))
We now have a key to all "FRIEND" relationships so we can ask:
pete(friends andThen name)
This returns an Iterable[String] with the names of all Pete's friends.
We can even do:
pete(Rec(friends) andThen name)
This returns an Iterable[String] with the names of all Pete's friends of
friends (to the n-th degree). The Rec object recursively applies "friend" to
all vertices it traverses, remembering already taken paths, traversed
Relationships or traversed Nodes (settings are optional with sensible defaults).
We can also write:
pete(Rec(friend, 2) andThen name)
This returns an Iterable[String] with the names of all Pete's friends of
friends (to the 2nd degree)
It is even possible to write:
pete(Rec(friend andThen friend) andThen name)
This returns an Iterable[String] with the names of all Pete's friends of
friends (to the n-th degree where n is even)
Instead of having get methods for properties and relationships and traversal
methods on nodes, the Scala API uses one calling pattern for all database
related objects:
object(traverser)
So a call like Db(String("name")) is not just a call on the database to return
a PropertyType with name "name" and datatype String, it is a traversal from the
database to that PropertyType. What is being returned with that call is a
traverser itself.
Traversers can be composed with "andThen", so the output of one traverser is
used as input for the next traverser.
All traversers are typed, so the "andThen" connective can only be applied when
the type of the output of the left-hand-side traverser is equal to the type as
the input of the right-hand-side traverser. This is checked at compile time.
Traversals not only work on Vertex objects and it's subtypes (Property,
PropertyType, Edge, EdgeType...), it also works on Iterable[Vertex].
Instead of fetching just pete's friends, as in:
pete(friends)
we can also fetch the friends of pete and john:
val frnds = List(pete, john)
frnds(friends)
or if we don't need the "frnds" object later on, we simply state:
List(pete, john)(friends)
and if we want the names of those friends:
List(pete, john)(friends andThen name)
it is even possible to set properties or create relationships on
Iterable[Vertex]
val age = Db(Int("age"))
val nationality = Db(String("nationality"))
List(pete, john).put(age, 40).put(nationality, "Irish")
This sets the "age" property to 40 on both "pete" and "john".
It is also possible to write this as a traversal:
List(pete, john)(Put(age, 40) andThen Put(nationality, "Irish"))
All traversers are function objects, so they can both be called as a function
and can be treated as an object. This makes it possible to create traverers
programmatically, allowing for the storage of traversers in the database, and
many more nifty tricks.
Using the Put object, we could for example create
Re: [Neo4j] Neo4j .Net Api - Indexing
Hi Peter, We been doing some work on Azure Cloud deployment. At some point I will put a blog post up on it when I find a moment. Some aspects of it in regards to automatic deployment (not bootstrapping) is on this blog, you will notice the PowerShell scripts in the blog below pertain to getting neo4j binaries from blog storage. The next blog will cover the actual hosting of Neo4j as a worker role off the blob and cloud drive. http://romikoderbynew.com/2011/08/12/automating-windows-azure-deployments-leveraging-teamcityartefacts-and-powershell/ -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Peter Neubauer Sent: Monday, 29 August 2011 2:05 AM To: Neo4j user discussions Subject: Re: [Neo4j] Neo4j .Net Api - Indexing Cool Tatham, Thanks for sharing, let us know your progress - there is also work going on to deploy Neo4j Server on Azure, let me know if you are interested in testing or helping out there! /peter On Sunday, August 28, 2011, Tatham Oddie wrote: > Hi Peter, > > The client library is on NuGet: http://nuget.org/List/Packages/Neo4jClient.Edge > > (NuGet is .NET's package manager.) > > The source code is up at http://hg.tath.am/neo4jclient > > I haven't pushed it to GitHub yet because of a bug in Dulwich > affecting my version of Hg-Git. (Empty repo at https://github.com/tathamoddie/Neo4jClientwhere it'll go eventually.) > > > > -- Tatham > > > -Original Message- > From: user-boun...@lists.neo4j.org > [mailto:user-boun...@lists.neo4j.org] On Behalf Of Peter Neubauer > Sent: Sunday, 28 August 2011 5:55 PM > To: Neo4j user discussions > Subject: Re: [Neo4j] Neo4j .Net Api - Indexing > > Romiko, > Nice writeup! Do you have the link to the full project for people to try? Is it on GIThub for people to try? > > /peter > > On Sunday, August 28, 2011, Romiko Derbynew > > wrote: >> Hi Guys, >> >> I have written a blog on using our .Net Api for indexes in .Net, so >> any > .Net dudes out there might want to give it a bash, look forward > hearing feedback. >> >> http://romikoderbynew.com/2011/08/28/lucene-full-text-indexing-with-n >> e >> o4j/ >> >> Cheers >> >> ___ >> Neo4j mailing list >> User@lists.neo4j.org >> https://lists.neo4j.org/mailman/listinfo/user >> > > -- > > Cheers, > > /peter neubauer > > 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://startupbootcamp.org/- Öresund - Innovation happens HERE. > http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. > ___ > 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 > -- Cheers, /peter neubauer 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://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. ___ 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
[Neo4j] Spatial query with property filter
Hey guys, I'm seeing some kind of disconnect between the spatial and the regular graph traversing query. I can't find a way of executing a spatial query like in SimplePointLayer but also providing something like a ReturnEvaluator. My use case is essentially for all nodes within a 10km radius, return all with name "foo". Do I actually have to iterate through all the nodes returned by the query in a list and individually check them? Thanks, faffi -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Spatial-query-with-property-filter-tp3291410p3291410.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Delete all contents in graph?
Thanks, Pete, this is perfect! -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Peter Neubauer Sent: Saturday, August 27, 2011 6:47 PM To: Neo4j user discussions Subject: Re: [Neo4j] Delete all contents in graph? Raffi, you can do something like https://github.com/neo4j/community/blob/master/kernel/src/test/java/org/neo4 j/test/ImpermanentGraphDatabase.java#L203, basically walking all nodes and deleting the relationships, and delete the nodes after that. Would that work? Otherwise, simple shutdown the DB, delete the database dir and start it again. Cheers, /peter neubauer 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://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. On Sun, Aug 28, 2011 at 12:11 AM, etc1 wrote: > Is there a function to delete all contents in the graph? > > Raffi > > ___ > 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 ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] More batch vs. single operation benchmarks
I suspect (though I haven't profiled it) that the decreasing performance of batches could be due to JSON processing. If so, we're going to have to switch to some kind of streamed approach for the REST batch API. I'll add these notes into the job in the community backlog. Thanks very much Josh! Jim ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Cypher with sequenced relationships return empty
What made it work? On Sunday, August 28, 2011, noppanit wrote: > Solved! > > -- > View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Cypher-with-sequenced-relationships-return-empty-tp3289960p3291043.html > Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. > ___ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > -- Cheers, /peter neubauer 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://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] More batch vs. single operation benchmarks
Wow. That's surprising data. With Neo4J embedded, we can usually get about 100X of that performance (including Lucene indexing of the nodes), so there clearly seem to be some big impacts from using the REST interface versus Neo4J embedded. -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of jadell Sent: Sunday, August 28, 2011 3:55 PM To: user@lists.neo4j.org Subject: [Neo4j] More batch vs. single operation benchmarks Here are the latest benchmarks of batch vs. individual entity creation using the Neo4jPHP library. Most of the processing time is spent on the server, so I believe that these numbers are probably not specific to Neo4jPHP. I'm not implying that there is anything wrong or to be fixed; I just thought the results might be of interest to others. I'd love to see results from others using a REST client in any language. 3 scenarios were run 10 times each for different batch sizes. The scenarios and averages of the 10 runs of each batch size are below. First column is the batch size, second column is the average time in seconds to create that many entities in a batch, third column is the average time in seconds to create that many entities with individual calls. Benchmark script can be found here: http://gist.github.com/1177100 Results: Scenario 1: Create nodes sizebatchsingle 10 00 100 00.8 250 0.1 1.5 500 0.9 1.7 10001.5 3.8 25006.7 9.6 500023.5 13.2 Scenario 2: Create relationships sizebatchsingle 10 00 100 0.2 0.2 250 0.3 0.5 500 0.6 1.1 10001.3 3 25007.1 9.7 500025.3 22.2 Scenario 3: Create 2 nodes and a relationship between them sizebatchsingle 10 00.1 100 0.4 1.3 250 0.8 3 500 2.9 5.2 10009.2 11.9 250054.3 29.9 5000710.359.6 Note: in the 5000 run of the last scenario, 15000 operations are sent in a single HTTP request. 10 runs of the 5000 batch size (15 operations total operations in 10 batches) took almost 2 hours to complete. -- Josh Adell -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/More-batch-vs-single-operation-benchmarks-tp3291092p3291092.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.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
[Neo4j] More batch vs. single operation benchmarks
Here are the latest benchmarks of batch vs. individual entity creation using the Neo4jPHP library. Most of the processing time is spent on the server, so I believe that these numbers are probably not specific to Neo4jPHP. I'm not implying that there is anything wrong or to be fixed; I just thought the results might be of interest to others. I'd love to see results from others using a REST client in any language. 3 scenarios were run 10 times each for different batch sizes. The scenarios and averages of the 10 runs of each batch size are below. First column is the batch size, second column is the average time in seconds to create that many entities in a batch, third column is the average time in seconds to create that many entities with individual calls. Benchmark script can be found here: http://gist.github.com/1177100 Results: Scenario 1: Create nodes sizebatchsingle 10 00 100 00.8 250 0.1 1.5 500 0.9 1.7 10001.5 3.8 25006.7 9.6 500023.5 13.2 Scenario 2: Create relationships sizebatchsingle 10 00 100 0.2 0.2 250 0.3 0.5 500 0.6 1.1 10001.3 3 25007.1 9.7 500025.3 22.2 Scenario 3: Create 2 nodes and a relationship between them sizebatchsingle 10 00.1 100 0.4 1.3 250 0.8 3 500 2.9 5.2 10009.2 11.9 250054.3 29.9 5000710.359.6 Note: in the 5000 run of the last scenario, 15000 operations are sent in a single HTTP request. 10 runs of the 5000 batch size (15 operations total operations in 10 batches) took almost 2 hours to complete. -- Josh Adell -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/More-batch-vs-single-operation-benchmarks-tp3291092p3291092.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] [Solved] Cypher with sequenced relationships return empty
Solved! -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Cypher-with-sequenced-relationships-return-empty-tp3289960p3291043.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Cypher with sequenced relationships return empty
Hi Thank you for your reply, but I did this in embedded neo4j.
This is what I've done.
String queryAllNotifications = String.format("start n=(%d), user=(%d) match
(n)-[:%s]-(x)-[:%s]-(user) return x", notificationsIndex.getId(),
userNode.getId(),
CONTAINS.name(),
MESSAGE_TO.name());
And I'm pretty sure that all the variables are correct.
And this is the printout of the string
start n=(6), user=(9) match (n)-[:Contains]-(x)-[:Message_To]-(user) return
x
Thanks a lot.
--
View this message in context:
http://neo4j-community-discussions.438527.n3.nabble.com/Cypher-with-sequenced-relationships-return-empty-tp3289960p3291022.html
Sent from the Neo4j Community Discussions mailing list archive at Nabble.com.
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Re: [Neo4j] Neo4j .Net Api - Indexing
Cool Tatham, Thanks for sharing, let us know your progress - there is also work going on to deploy Neo4j Server on Azure, let me know if you are interested in testing or helping out there! /peter On Sunday, August 28, 2011, Tatham Oddie wrote: > Hi Peter, > > The client library is on NuGet: http://nuget.org/List/Packages/Neo4jClient.Edge > > (NuGet is .NET's package manager.) > > The source code is up at http://hg.tath.am/neo4jclient > > I haven't pushed it to GitHub yet because of a bug in Dulwich affecting my version of Hg-Git. (Empty repo at https://github.com/tathamoddie/Neo4jClientwhere it'll go eventually.) > > > > -- Tatham > > > -Original Message- > From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Peter Neubauer > Sent: Sunday, 28 August 2011 5:55 PM > To: Neo4j user discussions > Subject: Re: [Neo4j] Neo4j .Net Api - Indexing > > Romiko, > Nice writeup! Do you have the link to the full project for people to try? Is it on GIThub for people to try? > > /peter > > On Sunday, August 28, 2011, Romiko Derbynew > wrote: >> Hi Guys, >> >> I have written a blog on using our .Net Api for indexes in .Net, so >> any > .Net dudes out there might want to give it a bash, look forward hearing feedback. >> >> http://romikoderbynew.com/2011/08/28/lucene-full-text-indexing-with-ne >> o4j/ >> >> Cheers >> >> ___ >> Neo4j mailing list >> User@lists.neo4j.org >> https://lists.neo4j.org/mailman/listinfo/user >> > > -- > > Cheers, > > /peter neubauer > > 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://startupbootcamp.org/- Öresund - Innovation happens HERE. > http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. > ___ > 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 > -- Cheers, /peter neubauer 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://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] RDF querying
Hello,
Note that with loadFile(), you are not incrementing your commit manager's
counter and thus, if your RDF file is large, you may run out of memory. See the
work of Claudio for a good model for large RDF graphs:
http://blog.acaro.org/entry/dbpedia4neo
https://github.com/claudiomartella/dbpedia4neo/tree/master/src/main/java/org/acaro/dbpedia4neo/inserter
Finally, you do not manager.close() at the end in order to commit your
transaction.
Good luck,
Marko.
http://markorodriguez.com
On Aug 28, 2011, at 9:09 AM, Shri :) wrote:
> Hello everyone,
>
> I am very very new to Neo4j and OOP, I am working on a project using
> Neo4j system. I have already uploaded my RDF data into Neo4j using the
> following code (snippet)
>
>
>
> Neo4jGraph neo = new Neo4jGraph("dataset");
>Sail sail = new GraphSail(neo);
> sail.initialize();
>CommitManager manager =
> TransactionalGraphHelper.createCommitManager(neo, 10);
>
>SailConnection sc= sail.getConnection();
>
>for (String file: args) {
>System.out.println("Loading " + file + ": ");
>loadFile(file, sail.getConnection(), sail.getValueFactory(), manager);
>System.out.print('\n');
>}
>
>
> I now want to write write a separate code to make my connection with the
> already created RDF store using Sail, I am confused about how I can make
> this connection without creating any new store..Kindly throw some light on
> this, I am stuck very badly..Thanks in advance..
>
>
> shri
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Re: [Neo4j] RDF querying
Hi there,
the basics should be covered under
https://github.com/tinkerpop/blueprints/wiki/Sail-Ouplementation, let me
know if that helps!
Cheers,
/peter neubauer
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://startupbootcamp.org/- Öresund - Innovation happens HERE.
http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.
On Sun, Aug 28, 2011 at 5:07 PM, shri wrote:
> Hello everyone,
>
> I am very very new to Neo4j and OOP, I am working on a project using
> Neo4j system. I have already uploaded my RDF data into Neo4j using the
> following code (snippet)
>
>
>
> Neo4jGraph neo = new Neo4jGraph("dataset");
>Sail sail = new GraphSail(neo);
> sail.initialize();
>CommitManager manager =
> TransactionalGraphHelper.createCommitManager(neo, 10);
>
>SailConnection sc= sail.getConnection();
>
>for (String file: args) {
>System.out.println("Loading " + file + ": ");
>loadFile(file, sail.getConnection(), sail.getValueFactory(),
> manager);
>System.out.print('\n');
>}
>
>
> I now want to write write a separate code to make my connection with the
> already created RDF store using Sail, I am confused about how I can make
> this connection without creating any new store..Kindly throw some light on
> this, I am stuck very badly..Thanks in advance..
>
> --
> View this message in context:
> http://neo4j-community-discussions.438527.n3.nabble.com/RDF-querying-tp3290725p3290725.html
> Sent from the Neo4j Community Discussions mailing list archive at
> Nabble.com.
> ___
> Neo4j mailing list
> User@lists.neo4j.org
> https://lists.neo4j.org/mailman/listinfo/user
>
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[Neo4j] RDF querying
Hello everyone,
I am very very new to Neo4j and OOP, I am working on a project using
Neo4j system. I have already uploaded my RDF data into Neo4j using the
following code (snippet)
Neo4jGraph neo = new Neo4jGraph("dataset");
Sail sail = new GraphSail(neo);
sail.initialize();
CommitManager manager =
TransactionalGraphHelper.createCommitManager(neo, 10);
SailConnection sc= sail.getConnection();
for (String file: args) {
System.out.println("Loading " + file + ": ");
loadFile(file, sail.getConnection(), sail.getValueFactory(), manager);
System.out.print('\n');
}
I now want to write write a separate code to make my connection with the
already created RDF store using Sail, I am confused about how I can make
this connection without creating any new store..Kindly throw some light on
this, I am stuck very badly..Thanks in advance..
shri
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[Neo4j] RDF querying
Hello everyone,
I am very very new to Neo4j and OOP, I am working on a project using
Neo4j system. I have already uploaded my RDF data into Neo4j using the
following code (snippet)
Neo4jGraph neo = new Neo4jGraph("dataset");
Sail sail = new GraphSail(neo);
sail.initialize();
CommitManager manager =
TransactionalGraphHelper.createCommitManager(neo, 10);
SailConnection sc= sail.getConnection();
for (String file: args) {
System.out.println("Loading " + file + ": ");
loadFile(file, sail.getConnection(), sail.getValueFactory(),
manager);
System.out.print('\n');
}
I now want to write write a separate code to make my connection with the
already created RDF store using Sail, I am confused about how I can make
this connection without creating any new store..Kindly throw some light on
this, I am stuck very badly..Thanks in advance..
--
View this message in context:
http://neo4j-community-discussions.438527.n3.nabble.com/RDF-querying-tp3290725p3290725.html
Sent from the Neo4j Community Discussions mailing list archive at Nabble.com.
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Re: [Neo4j] Cypher with sequenced relationships return empty
Did you do this in the webadmin? Remember to hit Enter twice, otherwise it is just a line break for multiline statements ... Cheers, /peter neubauer 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://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. On Sun, Aug 28, 2011 at 1:40 AM, noppanit wrote: > Hi All, > > This is my graph, > > Notifications --[Contains]-- Notification --[Message_To]-- User > > start n=(6), user=(9) match (n)-[:Contains]-(x)-[:Message_To]-(user) return > x > > But when I run this cypher I got nothing back, so I'm not sure if I'm > missing nothing obvious? > > -- > View this message in context: > http://neo4j-community-discussions.438527.n3.nabble.com/Cypher-with-sequenced-relationships-return-empty-tp3289960p3289960.html > Sent from the Neo4j Community Discussions mailing list archive at > Nabble.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
Re: [Neo4j] Best library for Clojure?
Don, yes, this looks pretty hot. also, https://github.com/mattrepl/clojure-neo4j/network seems to list some other forks. Does anyone have pointers? Cheers, /peter neubauer 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://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. On Mon, Jul 25, 2011 at 6:54 AM, Don Jackson < neo4j-u...@clark-communications.com> wrote: > > Hello, > > Which is the best library for using Neo4j from Clojure? > > This fork: > >https://github.com/wagjo/borneo > > Seems active, and maintained. > > Any advice or pointers would be appreciated. > > Don > > ___ > 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
Re: [Neo4j] Neo4j .Net Api - Indexing
Thx man! Sent from my iPhone On 28/08/2011, at 8:18 PM, "Tatham Oddie" wrote: > Hi Peter, > > The client library is on NuGet: > http://nuget.org/List/Packages/Neo4jClient.Edge > > (NuGet is .NET's package manager.) > > The source code is up at http://hg.tath.am/neo4jclient > > I haven't pushed it to GitHub yet because of a bug in Dulwich affecting my > version of Hg-Git. (Empty repo at https://github.com/tathamoddie/Neo4jClient > where it'll go eventually.) > > > > -- Tatham > > > -Original Message- > From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On > Behalf Of Peter Neubauer > Sent: Sunday, 28 August 2011 5:55 PM > To: Neo4j user discussions > Subject: Re: [Neo4j] Neo4j .Net Api - Indexing > > Romiko, > Nice writeup! Do you have the link to the full project for people to try? Is > it on GIThub for people to try? > > /peter > > On Sunday, August 28, 2011, Romiko Derbynew > wrote: >> Hi Guys, >> >> I have written a blog on using our .Net Api for indexes in .Net, so >> any > .Net dudes out there might want to give it a bash, look forward hearing > feedback. >> >> http://romikoderbynew.com/2011/08/28/lucene-full-text-indexing-with-ne >> o4j/ >> >> Cheers >> >> ___ >> Neo4j mailing list >> User@lists.neo4j.org >> https://lists.neo4j.org/mailman/listinfo/user >> > > -- > > Cheers, > > /peter neubauer > > 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://startupbootcamp.org/- Öresund - Innovation happens HERE. > http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. > ___ > 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 > ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Loading WordNet 3.0 RDF into Neo4j?
Peter Neubauer wrote: > > I would try the blueprints rdf importer. look at my github home > (peterneubauer) for a project to import rdf from dbpedia which should > work for any rdf. > Thanks Peter! -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Loading-WordNet-3-0-RDF-into-Neo4j-tp3289356p3290448.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j .Net Api - Indexing
Hi Peter, The client library is on NuGet: http://nuget.org/List/Packages/Neo4jClient.Edge (NuGet is .NET's package manager.) The source code is up at http://hg.tath.am/neo4jclient I haven't pushed it to GitHub yet because of a bug in Dulwich affecting my version of Hg-Git. (Empty repo at https://github.com/tathamoddie/Neo4jClient where it'll go eventually.) -- Tatham -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Peter Neubauer Sent: Sunday, 28 August 2011 5:55 PM To: Neo4j user discussions Subject: Re: [Neo4j] Neo4j .Net Api - Indexing Romiko, Nice writeup! Do you have the link to the full project for people to try? Is it on GIThub for people to try? /peter On Sunday, August 28, 2011, Romiko Derbynew wrote: > Hi Guys, > > I have written a blog on using our .Net Api for indexes in .Net, so > any .Net dudes out there might want to give it a bash, look forward hearing feedback. > > http://romikoderbynew.com/2011/08/28/lucene-full-text-indexing-with-ne > o4j/ > > Cheers > > ___ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > -- Cheers, /peter neubauer 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://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. ___ 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
Re: [Neo4j] Neo4j .Net Api - Indexing
Romiko, Nice writeup! Do you have the link to the full project for people to try? Is it on GIThub for people to try? /peter On Sunday, August 28, 2011, Romiko Derbynew wrote: > Hi Guys, > > I have written a blog on using our .Net Api for indexes in .Net, so any .Net dudes out there might want to give it a bash, look forward hearing feedback. > > http://romikoderbynew.com/2011/08/28/lucene-full-text-indexing-with-neo4j/ > > Cheers > > ___ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > -- Cheers, /peter neubauer 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://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
