Re: [Neo4j] Modelling with neo4j
Great Bryce, Let us know if it could work out! /peter Sent from my phone. On Sep 28, 2011 5:38 AM, Bryce bryc...@gmail.com wrote: Following up on the part of this discussion about moving the enhanced api out of the graph collections module, was meaning to get to this earlier but got side tracked. The dependency that IndexedRelationship had on the ComparablePropertyType which I am assuming is what you are referring to there no longer exists. PropertySortedTree still has a dependency on ComparablePropertyType but this collection could be taken along with the enhanced api as a specialisation of the SortedTree collection specific to the enhanced api. As it still implements NodeCollection it can be used as the basis of an IndexedRelationship, but IndexedRelationship doesn't need to know about it at all. I am wondering however whether there is a problem with this as one thing I just realised isn't happening that previously did is the storage of the property type into the node collection, and for that matter PropertySortedTree currently has no node only constructor so wouldn't currently work correctly I will look into that (hadn't done that since I haven't even had a good look at the enhanced api yet). On Sun, Sep 25, 2011 at 3:28 AM, Niels Hoogeveen pd_aficion...@hotmail.comwrote: +1 Enhanced API grew out of a couple of classes I added to make IndexedRelationship work more easily (not exposing comparators), but it is essentially a separate component. Giving it that status would help other's improve it. Having laid some of the ground work, I feel it needs other people's input too. As it stands now, it is very much a one-man's work and while I am confident it contains plenty of good ideas, it can only grow with the input of other developers, just like IndexedRelationships has become much better thanks to the work Bryce put into it, and the work of others to include graph-collections with structures I would not even have thought about. There is however one thing we need to look at. Right now IndexRelationships has a dependency on Enhanced API for the indexing of nodes based on a property. At the same time Enhanced API has a dependency on graph-collections, transparently supporting IndexedRelationships in the API. I think it would be best to remove the dependency of graph-collections on enhanced-api and only offer the slightly more complex option where the user needs to provide a comparator. The other dependency can remain and in fact can even be made stronger. Enhanced API could in principle be made to support any type of collection, now that Bryce has added a generic nodecollection interface. I agree enhanced api is not a great name, it says what it does, but certainly has little appeal. So I will be happy if someone can come up with something sexier. Niels From: peter.neuba...@neotechnology.com Date: Sat, 24 Sep 2011 15:42:13 +0200 To: user@lists.neo4j.org Subject: Re: [Neo4j] Modelling with neo4j Great thoughts guys! I think it would be interesting to break out the Enhanced API from graph-collections, rename it into something better (we can think of a name together) and provide a more fully fledged example that we can document and evolve. WDYT? 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 Sat, Sep 24, 2011 at 3:37 PM, Rick Bullotta rick.bullo...@thingworx.com wrote: That's a great summary, Niels. Very similar to how we've applied Neo4J here at ThingWorx, though we've done most of the type system work (nodes and relationships are all typed/subtyped) in our application domain layer. A few other items that we leveraged in our implementation that you may wish to consider: - A common pattern we encountered was a collection of typed entities (e.g. a typed collection), and we implemented a specific model using supernodes for this. This also allowed us to rapidly and easily iterate/search collections and also to organize nodes in a human comprehensible way that can be readily viewed with something like Neoclipse for troubleshooting purposes. Also, if the type was truck, we stamped the node with the type truck as a property (using enumerations with a custom int member) and used that same enum as the relationship type between the node and the collection node. In our model, an entity has a single type, but we implemented the concept of supertyping/subtyping in our domain model - We found quite a few examples where a one-way relationship was more than adequate and, instead of incurring the overhead of a relationship (particularly when millions of these
Re: [Neo4j] Rebuilding Lucene index
Good, thanks for reporting back Rama! 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 Fri, Sep 23, 2011 at 1:16 AM, Rama Manusama rama.manus...@gmail.com wrote: Hi all, Would like to confirm that the problem got somewhat solved after it tried to perform CheckIndex -fix on every lucene index folder. Unfortunately I could not investigate which 'corrupted' index did the tool delete, therefore a 'complete' index rebuilding would be a good last option in this case. Anyway knowing that such tool exist is already a big step ahead. Thanks for everything! Rama On Mon, Sep 19, 2011 at 1:59 AM, Rama Manusama rama.manus...@gmail.comwrote: No problem, you could download it here https://docs.google.com/leaf?id=0B4qYoS7piZ7PNDdhNzkzMWEtMWMyYS00MWNmLWI3YzktYjFiZjllMzk0MzA2hl=en_US Thanks, Rama On Mon, Sep 19, 2011 at 12:32 AM, Michael Hunger michael.hun...@neotechnology.com wrote: Sorry the mailing list eats attachments, can you copy it in the mail or make it available somewhere? Thanks Michael Am 18.09.2011 um 23:32 schrieb Rama Manusama: True, I reproduced the error again just now, messages.log is attached Thanks and cheers, Rama On Sun, Sep 18, 2011 at 11:14 PM, Mattias Persson matt...@neotechnology.com wrote: I'm guessing the important stack trace regarding the loading of the lucene index provider is found in my-neo4j-db-folder/messages.log. Could you go look there? 2011/9/18 Rama Manusama rama.manus...@gmail.com Hi Michael, Sure, here you go, thanks! Sep 18, 2011 9:37:39 PM org.neo4j.kernel.impl.transaction.TransactionImpl doBeforeCompletion WARNING: Caught exception from tx syncronization[org.neo4j.kernel.impl.core.TransactionEventsSyncHook@1531a989 ] beforeCompletion() java.lang.RuntimeException: org.jruby.exceptions.RaiseException: Native Exception: 'class java.lang.IllegalArgumentException'; Message: No index provider 'lucene' found; StackTrace: java.lang.IllegalArgumentException: No index provider 'lucene' found at org.neo4j.kernel.IndexManagerImpl.getIndexProvider(IndexManagerImpl.java:76) at org.neo4j.kernel.IndexManagerImpl.findIndexConfig(IndexManagerImpl.java:116) at org.neo4j.kernel.IndexManagerImpl.getOrCreateIndexConfig(IndexManagerImpl.java:178) at org.neo4j.kernel.IndexManagerImpl.getOrCreateNodeIndex(IndexManagerImpl.java:267) at org.neo4j.kernel.IndexManagerImpl.forNodes(IndexManagerImpl.java:255) at org.neo4j.kernel.impl.core.TransactionEventsSyncHook.beforeCompletion(TransactionEventsSyncHook.java:95) at org.neo4j.kernel.impl.transaction.TransactionImpl.doBeforeCompletion(TransactionImpl.java:356) at org.neo4j.kernel.impl.transaction.TxManager.commit(TxManager.java:635) at org.neo4j.kernel.impl.transaction.TransactionImpl.commit(TransactionImpl.java:109) at org.neo4j.kernel.TopLevelTransaction.finish(TopLevelTransaction.java:85) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:616) at org.jruby.javasupport.JavaMethod.invokeDirectWithExceptionHandling(JavaMethod.java:508) at org.jruby.javasupport.JavaMethod.invokeDirect(JavaMethod.java:368) at org.jruby.java.invokers.InstanceMethodInvoker.call(InstanceMethodInvoker.java:50) at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:292) at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:135) at org.jruby.ast.CallNoArgNode.interpret(CallNoArgNode.java:63) at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104) at org.jruby.ast.BlockNode.interpret(BlockNode.java:71) at org.jruby.evaluator.ASTInterpreter.INTERPRET_METHOD(ASTInterpreter.java:75) at org.jruby.internal.runtime.methods.InterpretedMethod.call(InterpretedMethod.java:147) at org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:163) at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:292) at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:135) at org.jruby.ast.VCallNode.interpret(VCallNode.java:86) at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104) at org.jruby.ast.EnsureNode.interpret(EnsureNode.java:98) at
Re: [Neo4j] Some questions about design when using neo4j
Gen, I guess there is nothing out of the box right now, but you could get inspiration from http://jung.sourceforge.net/doc/api/index.html, especially http://jung.sourceforge.net/doc/api/edu/uci/ics/jung/algorithms/flows/EdmondsKarpMaxFlow.html and implement one or just use it on a toy graph to test it out? 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 Sat, Sep 3, 2011 at 12:33 AM, Benjamin Gustafsson benjamingustafs...@gmail.com wrote: Just in case there are any graph experts out there that want to exercise their brains. (Its quite a while since I studied algorithms and optimization regarding graphs. :-) I'm able to implement a algorithm described in pseudocode (if anyone knows a good algorithm for my special case below). I have the transportation problem and need to find a preferably small (not necessarily smallest) set of nodes that transports a certain amount of credit/commodity from source node S to sink node T. All edges have a capacity stated as a attribute for the edge, this can be read while traversing the graph. Transportation cost for commodity/credit in the graph is zero. The only cost in this graph problem is computation time to *find a set of paths delivering all the commodity*(in my case credit). The path lengths chosen are not important. (This is the standard ripplepay problem, but I didn't like the algorithms used by the original ripplepay implementation. It does not scale up to millions of users. It is not fast enough.) http://en.wikipedia.org/wiki/Transportation_network_%28graph_theory%29 And I also need a quick way of analysing if it is possible to send all commodity across the network. If the amount commodity to be sent is lower than max flow. (lower than min cut). There will initially be clusters with very few edges connecting the clusters. If the nodes are in different clusters the min cut can be really easy/*quick* to find (if we do it the right way). http://en.wikipedia.org/wiki/Max-flow_min-cut_theorem Any implementations for neo4j already available regarding my special case? -- //Benjamin Gustafsson ___ 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] REST API Base URI
On Tue, Sep 27, 2011 at 11:29 PM, Nuo Yan yan@gmail.com wrote: Hi Jake, Thanks for your reply. Sorry if my previous email was misleading, but I don't absolutely need key-based authentication; that just turned out to be the what I first thought of. I was trying to figure out what authentication methods were supported so that I can evaluate. HTTPS + basic auth with strong passwords do sound good to me at this moment. However, at this moment, instead of using authentication, I turned out configured security rules on my the neo4j server to only take connections from my app server so I temporarily don't have a problem in the near future. But it's good to know about the authentication extension. By the way, do you have any data about the performance impact of using the authentication extension to do basic auth + HTTPS compare to talking to neo4j without authentication (both through REST)? If you have such data, please let me know. That would be very helpful information. I'm afraid not. However, as long as you make sure to reuse TCP connections (Connection:keep-alive), the overhead of https should be minimal. While the same does not apply for basic auth, it should not add a significant performance overhead compared to normal REST. /Jake Thanks, Nuo On Tue, Sep 27, 2011 at 6:10 AM, Jacob Hansson jacob.hans...@neotechnology.com wrote: As far as I know, the auth plugin currently only supports HTTP BASIC authentication. But it would be interesting to expand it to allow other authentication methods, for instance by allowing pluggable authentication providers. So if I understand your question correctly, yes, it does support authentication beyond just limiting access by IP, but it does not support authentication using keys or certificates. Out of curiosity, what is the driver behind needing key-based authentication? The combination of HTTP BASIC, strong passwords and HTTPS seems like it would supply quite strong security, no? /Jake On Wed, Sep 21, 2011 at 9:16 PM, Nuo Yan yan@gmail.com wrote: Limiting access to certain URIs or IPs is great, but ideally at this moment I also need something like a key-based authentication so I can send a private key in the headers from my restclient and neo4j would authenticate and only take authenticated requests. Does the authentication extension support key-based authentication? If not, what forms of authentication does it currently support (user/password, token-based, shared-secret)? Thanks, Nuo On Wed, Sep 21, 2011 at 11:24 AM, Peter Neubauer peter.neuba...@neotechnology.com wrote: Nuo, Thomas Baum has been working on an authentication extension for Neo4j Server, see https://github.com/neo4j/authentication-extension. He could help you set it up and test it - it's used in hosting scenarios and should do what you want in terms of limiting access to certain URIs if that is what you want? 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 Wed, Sep 21, 2011 at 6:14 PM, Nuo Yan yan@gmail.com wrote: For my scenario, I currently only use the LB for request authentication, so that not everyone on the network can access the neo4j server. In my use case, I think making the base uri configurable (including the protocol, e.g. https://foobar.com/) is enough. There are a couple other approaches that may also solve my problem. For example, having a configurable option to make the REST APIs return only relative paths in the result. Or, if neo4j could have a built-in request authentication mechanism for the REST interface, I may be able to get rid of the lb completely. On Wed, Sep 21, 2011 at 7:04 AM, Peter Neubauer peter.neuba...@neotechnology.com wrote: Nuo, right now the server is discovering its own IP upon startup. However, it sounds reasonable to return configurable base URL. I am just wondering if that really is enough to support a LB scenario? Do you need more stuff there? 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.
Re: [Neo4j] cypher variable relationships
Hi Michael, I'm not using the latest snapshot but neo4j-community-1.5.M01, and neither * or ^ work there. I thought maybe it was because my relationship contains a blank space and thus is within ``. Anyway, it's not a big deal at the moment. Thanks anyway, Filip 2011/9/28 Michael Hunger michael.hun...@neotechnology.com There was a syntax change in the current snapshot from using the caret ^ to a star * Cheers Michael Am 27.09.2011 um 11:29 schrieb F. De Haes: Hi all, I tried this cypher query both in the console of the stable and in the milestone release, but it produces the same error: start a=(123) match b-[:`Runs on`^1..3]-a return distinct b == `]' expected but `^' found Thanks for your help, Filip ___ 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] cypher variable relationships
Ok, 1.5 is coming out in some week, so stay tuned, things will work then as seen in the appropriate manual edition. 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 Wed, Sep 28, 2011 at 10:33 AM, F. De Haes fi...@nibewege.org wrote: Hi Michael, I'm not using the latest snapshot but neo4j-community-1.5.M01, and neither * or ^ work there. I thought maybe it was because my relationship contains a blank space and thus is within ``. Anyway, it's not a big deal at the moment. Thanks anyway, Filip 2011/9/28 Michael Hunger michael.hun...@neotechnology.com There was a syntax change in the current snapshot from using the caret ^ to a star * Cheers Michael Am 27.09.2011 um 11:29 schrieb F. De Haes: Hi all, I tried this cypher query both in the console of the stable and in the milestone release, but it produces the same error: start a=(123) match b-[:`Runs on`^1..3]-a return distinct b == `]' expected but `^' found Thanks for your help, Filip ___ 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 mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] InvalidRecordException: Record[1983624] not in useRecord[1983624] not in use
hey everyone
I got a strange error message that a record is not in use if I call
hasRelationship() function even though I checked against null before! My
real purpose was to start the traverser but it exited with the same error
message. That is why I put the n.hasRelationship which also would not work.
I imported a graph with 50 mio. nodes and about the same size of
relationships. (though I am about to import more relationships later on) I
put 2 mio. nodes in a lucence index called article.
the counting variable t has the value 2385 (so the first 2385 calls work
fine) if I skip this node the same problem accoures again at t = 3239.
maybe it is usefull to say that I inserted the graph using the batch
inserter.
IndexHitsNode res = article.get(key, values[0]);
if (res!=null){
Node n = res.getSingle();
if (n!=null){
if (n.hasRelationship(DynamicRelationshipType.withName( UPDATE ),
Direction.BOTH)){
//n.traverse(Order.BREADTH_FIRST,StopEvaluator.DEPTH_ONE,
ReturnableEvaluator.ALL_BUT_START_NODE,DynamicRelationshipType.withName(
UPDATE ) );
t++;
}
}
callstack:
org.neo4j.kernel.impl.nioneo.store.InvalidRecordException: Record[1983624]
not in useRecord[1983624] not in use
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getRecord(RelationshipStore.java:230)
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getChainRecord(RelationshipStore.java:337)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:114)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:97)
at
org.neo4j.kernel.impl.persistence.PersistenceManager.getMoreRelationships(PersistenceManager.java:108)
at
org.neo4j.kernel.impl.core.NodeManager.getMoreRelationships(NodeManager.java:603)
at
org.neo4j.kernel.impl.core.NodeImpl.getMoreRelationships(NodeImpl.java:351)
at
org.neo4j.kernel.impl.core.NodeImpl.loadInitialRelationships(NodeImpl.java:318)
at
org.neo4j.kernel.impl.core.NodeImpl.ensureRelationshipMapNotNull(NodeImpl.java:305)
at
org.neo4j.kernel.impl.core.NodeImpl.getAllRelationshipsOfType(NodeImpl.java:156)
at org.neo4j.kernel.impl.core.NodeImpl.getRelationships(NodeImpl.java:236)
at org.neo4j.kernel.impl.core.NodeImpl.hasRelationship(NodeImpl.java:576)
at org.neo4j.kernel.impl.core.NodeProxy.hasRelationship(NodeProxy.java:109)
at IndexEvaluation.GenerateStreams(IndexEvaluation.java:124)
at IndexEvaluation.init(IndexEvaluation.java:98)
at EntryPoint.main(EntryPoint.java:20)
--
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[Neo4j] RBAC implementation using neo4j
Hi All, Was little curious if there is already any RBAC implementation using neo4j? Any pointers/links would be really helpful. Regards, Dharmendra. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] Current Geoserver integration instructions
Hi Another install question. I was wanting to test Neo4J as a backend for Geoserver. The Neo4J Spatial docs at: seem a little out of date. They say copy ..the following JAR files into the in the GeoServer directory webapps/geoserver/WEB-INF/lib: json-simple-1.1.jar geronimo-jta_1.1_spec-1.1.1.jar neo4j-kernel-1.2-1.2.M04.jar neo4j-index-1.2-1.2.M04.jar neo4j-spatial.jar These file names have obviously changed, well the bottom three certainly. And neo4j-index seems to have been deprecated, 'Changes.txt' says Excludes the neo4j-index component (not used anyhow) to enable HA mode. Anyway, could someone give me current instructions and filenames and locations. Apologies again for the noobness -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Current-Geoserver-integration-instructions-tp3375578p3375578.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] Creating a graph database with BatchInserter and getting the node degree of every node
On Thu, Sep 22, 2011 at 2:15 PM, st3ven st3...@web.de wrote: Hi Johan, I changed the settings as you described, but that changed the speed not really significantly. The previous configuration would make the machine use swap and that will kill performance. To store the degree as a property on each node is an option, but I want the node degree to be calculated from the graph database as I also want to check The problem is that you are trying to access a 85GB+ dataset using only 16GB RAM. The recommendation then is to aggregate the information (store the degree count as a property). Peter also mentioned using HA (cache sharding) but if you can just get some more RAM into the machine you will see an improvement. SSD disk would also help here since you are touching all edges in the graph while a mechanical disk (in this setup) will have horrible performance ( low throughput with 99% load on disk). There are SSD solutions that handle terabytes of data today and they are dropping in price. Regards, Johan ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] InvalidRecordException: Record[1983624] not in useRecord[1983624] not in use
Which version of neo4j did you use to import your data, was it a
downloadable package, from maven or building yourself from a branch?
2011/9/28 René Pickhardt r.pickha...@googlemail.com
hey everyone
I got a strange error message that a record is not in use if I call
hasRelationship() function even though I checked against null before! My
real purpose was to start the traverser but it exited with the same error
message. That is why I put the n.hasRelationship which also would not work.
I imported a graph with 50 mio. nodes and about the same size of
relationships. (though I am about to import more relationships later on) I
put 2 mio. nodes in a lucence index called article.
the counting variable t has the value 2385 (so the first 2385 calls work
fine) if I skip this node the same problem accoures again at t = 3239.
maybe it is usefull to say that I inserted the graph using the batch
inserter.
IndexHitsNode res = article.get(key, values[0]);
if (res!=null){
Node n = res.getSingle();
if (n!=null){
if (n.hasRelationship(DynamicRelationshipType.withName( UPDATE ),
Direction.BOTH)){
//n.traverse(Order.BREADTH_FIRST,StopEvaluator.DEPTH_ONE,
ReturnableEvaluator.ALL_BUT_START_NODE,DynamicRelationshipType.withName(
UPDATE ) );
t++;
}
}
callstack:
org.neo4j.kernel.impl.nioneo.store.InvalidRecordException: Record[1983624]
not in useRecord[1983624] not in use
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getRecord(RelationshipStore.java:230)
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getChainRecord(RelationshipStore.java:337)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:114)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:97)
at
org.neo4j.kernel.impl.persistence.PersistenceManager.getMoreRelationships(PersistenceManager.java:108)
at
org.neo4j.kernel.impl.core.NodeManager.getMoreRelationships(NodeManager.java:603)
at
org.neo4j.kernel.impl.core.NodeImpl.getMoreRelationships(NodeImpl.java:351)
at
org.neo4j.kernel.impl.core.NodeImpl.loadInitialRelationships(NodeImpl.java:318)
at
org.neo4j.kernel.impl.core.NodeImpl.ensureRelationshipMapNotNull(NodeImpl.java:305)
at
org.neo4j.kernel.impl.core.NodeImpl.getAllRelationshipsOfType(NodeImpl.java:156)
at org.neo4j.kernel.impl.core.NodeImpl.getRelationships(NodeImpl.java:236)
at org.neo4j.kernel.impl.core.NodeImpl.hasRelationship(NodeImpl.java:576)
at org.neo4j.kernel.impl.core.NodeProxy.hasRelationship(NodeProxy.java:109)
at IndexEvaluation.GenerateStreams(IndexEvaluation.java:124)
at IndexEvaluation.init(IndexEvaluation.java:98)
at EntryPoint.main(EntryPoint.java:20)
--
--
mobile: +49 (0)176 6433 2481
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http://www.beijing-china-blog.com
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--
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Hacker, Neo Technology
www.neotechnology.com
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Re: [Neo4j] Current Geoserver integration instructions
Al, Andreas has a working GeoServer integration with the current Neo4j Spatial and is just automating this with aWAR version of GeoServer. Give me some day and I will get back to you with an updated installation instruction of that is ok? 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 Wed, Sep 28, 2011 at 11:58 AM, handloomweaver a...@atomised.coop wrote: Hi Another install question. I was wanting to test Neo4J as a backend for Geoserver. The Neo4J Spatial docs at: seem a little out of date. They say copy ..the following JAR files into the in the GeoServer directory webapps/geoserver/WEB-INF/lib: json-simple-1.1.jar geronimo-jta_1.1_spec-1.1.1.jar neo4j-kernel-1.2-1.2.M04.jar neo4j-index-1.2-1.2.M04.jar neo4j-spatial.jar These file names have obviously changed, well the bottom three certainly. And neo4j-index seems to have been deprecated, 'Changes.txt' says Excludes the neo4j-index component (not used anyhow) to enable HA mode. Anyway, could someone give me current instructions and filenames and locations. Apologies again for the noobness -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Current-Geoserver-integration-instructions-tp3375578p3375578.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] threads on embeddedGraphDb
hi, while i was not trying to use threads, everything went fine. now i need concurrent java threads to access the same (embedded?) graph database. neo4j-manual.pdf for 1.4.1 says in section 1.1.2. that i should use HighlyAvailableGraphDatabase, which is no longer there in 1.5.1 as it seems. i have not looked into server and rest api yet, so is there a way to do a threaded app with say a queue thread and n worker threads inside the jvm that all do their own transactions on the same database location? the following exception is what i got for assigning the queue thread's embedded db to the worker threads, i guess. Exception in thread Thread-6 java.lang.RuntimeException: java.nio.channels.ClosedByInterruptException at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexWriter(LuceneDataSource.java:603) at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexSearcher(LuceneDataSource.java:486) at org.neo4j.index.impl.lucene.LuceneIndex.query(LuceneIndex.java:248) at org.neo4j.index.impl.lucene.LuceneIndex$RelationshipIndex.get(LuceneIndex.java:480) at de.stp.DatabaseNeo4j.removeUrlQueue(DatabaseNeo4j.java:777) at de.stp.util.BufferNeo4j.next(BufferNeo4j.java:194) at de.stp.RoboNeo4j.nächsterSchritt(RoboNeo4j.java:452) at de.stp.RoboNeo4j.run(RoboNeo4j.java:436) at java.lang.Thread.run(Thread.java:619) Caused by: java.nio.channels.ClosedByInterruptException at java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:184) at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:772) at org.apache.lucene.store.MMapDirectory$MMapIndexInput.init(MMapDirectory.java:225) at org.apache.lucene.store.MMapDirectory$MMapIndexInput.init(MMapDirectory.java:217) at org.apache.lucene.store.MMapDirectory.openInput(MMapDirectory.java:209) at org.apache.lucene.index.CompoundFileReader.init(CompoundFileReader.java:66) at org.apache.lucene.index.CompoundFileReader.init(CompoundFileReader.java:55) at org.apache.lucene.index.IndexWriter.getFieldInfos(IndexWriter.java:1193) at org.apache.lucene.index.IndexWriter.getCurrentFieldInfos(IndexWriter.java:1213) at org.apache.lucene.index.IndexWriter.init(IndexWriter.java:1149) at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexWriter(LuceneDataSource.java:590) ... 8 more Thx for any ideas. ciao, st.p. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] RBAC implementation using neo4j
Dharmendra, does something like http://docs.neo4j.org/chunked/snapshot/examples-acl-structures-in-graphs.html point you in the right direction? 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 Wed, Sep 28, 2011 at 11:57 AM, Dharmendra Kumar dharmendra...@gmail.com wrote: Hi All, Was little curious if there is already any RBAC implementation using neo4j? Any pointers/links would be really helpful. Regards, Dharmendra. ___ 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] RBAC implementation using neo4j
Thanks Peter! I also came across this page after making the post. It is indeed very helpful and sets a proper direction. -Dharmendra. On Wed, Sep 28, 2011 at 5:57 PM, Peter Neubauer peter.neuba...@neotechnology.com wrote: Dharmendra, does something like http://docs.neo4j.org/chunked/snapshot/examples-acl-structures-in-graphs.html point you in the right direction? 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 Wed, Sep 28, 2011 at 11:57 AM, Dharmendra Kumar dharmendra...@gmail.com wrote: Hi All, Was little curious if there is already any RBAC implementation using neo4j? Any pointers/links would be really helpful. Regards, Dharmendra. ___ 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] threads on embeddedGraphDb
Hi there, Neo4j in itself is thread safe, so you can pass it around as a singleton and access it from different Java threads. The HighlyAvailableGraphDatabase for scaling over multiple machines is part of neo4j-enterprise, so you need to update your maven dependencies to change community for enterprise. Does that help? 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 Wed, Sep 28, 2011 at 2:26 PM, st.pa st...@web.de wrote: hi, while i was not trying to use threads, everything went fine. now i need concurrent java threads to access the same (embedded?) graph database. neo4j-manual.pdf for 1.4.1 says in section 1.1.2. that i should use HighlyAvailableGraphDatabase, which is no longer there in 1.5.1 as it seems. i have not looked into server and rest api yet, so is there a way to do a threaded app with say a queue thread and n worker threads inside the jvm that all do their own transactions on the same database location? the following exception is what i got for assigning the queue thread's embedded db to the worker threads, i guess. Exception in thread Thread-6 java.lang.RuntimeException: java.nio.channels.ClosedByInterruptException at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexWriter(LuceneDataSource.java:603) at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexSearcher(LuceneDataSource.java:486) at org.neo4j.index.impl.lucene.LuceneIndex.query(LuceneIndex.java:248) at org.neo4j.index.impl.lucene.LuceneIndex$RelationshipIndex.get(LuceneIndex.java:480) at de.stp.DatabaseNeo4j.removeUrlQueue(DatabaseNeo4j.java:777) at de.stp.util.BufferNeo4j.next(BufferNeo4j.java:194) at de.stp.RoboNeo4j.nächsterSchritt(RoboNeo4j.java:452) at de.stp.RoboNeo4j.run(RoboNeo4j.java:436) at java.lang.Thread.run(Thread.java:619) Caused by: java.nio.channels.ClosedByInterruptException at java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:184) at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:772) at org.apache.lucene.store.MMapDirectory$MMapIndexInput.init(MMapDirectory.java:225) at org.apache.lucene.store.MMapDirectory$MMapIndexInput.init(MMapDirectory.java:217) at org.apache.lucene.store.MMapDirectory.openInput(MMapDirectory.java:209) at org.apache.lucene.index.CompoundFileReader.init(CompoundFileReader.java:66) at org.apache.lucene.index.CompoundFileReader.init(CompoundFileReader.java:55) at org.apache.lucene.index.IndexWriter.getFieldInfos(IndexWriter.java:1193) at org.apache.lucene.index.IndexWriter.getCurrentFieldInfos(IndexWriter.java:1213) at org.apache.lucene.index.IndexWriter.init(IndexWriter.java:1149) at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexWriter(LuceneDataSource.java:590) ... 8 more Thx for any ideas. ciao, st.p. ___ 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] threads on embeddedGraphDb
Having multiple threads accessing a neo4j graph database concurrently is what it's built for. This looks to be an issue with a lucene index. java.nio.* is very sensitive to thread interrupts, but I've never seen this exception before. Are you using Thread.interrupt() or some library that might do that for controlling threads? 2011/9/28 st.pa st...@web.de hi, while i was not trying to use threads, everything went fine. now i need concurrent java threads to access the same (embedded?) graph database. neo4j-manual.pdf for 1.4.1 says in section 1.1.2. that i should use HighlyAvailableGraphDatabase, which is no longer there in 1.5.1 as it seems. i have not looked into server and rest api yet, so is there a way to do a threaded app with say a queue thread and n worker threads inside the jvm that all do their own transactions on the same database location? the following exception is what i got for assigning the queue thread's embedded db to the worker threads, i guess. Exception in thread Thread-6 java.lang.RuntimeException: java.nio.channels.ClosedByInterruptException at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexWriter(LuceneDataSource.java:603) at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexSearcher(LuceneDataSource.java:486) at org.neo4j.index.impl.lucene.LuceneIndex.query(LuceneIndex.java:248) at org.neo4j.index.impl.lucene.LuceneIndex$RelationshipIndex.get(LuceneIndex.java:480) at de.stp.DatabaseNeo4j.removeUrlQueue(DatabaseNeo4j.java:777) at de.stp.util.BufferNeo4j.next(BufferNeo4j.java:194) at de.stp.RoboNeo4j.nächsterSchritt(RoboNeo4j.java:452) at de.stp.RoboNeo4j.run(RoboNeo4j.java:436) at java.lang.Thread.run(Thread.java:619) Caused by: java.nio.channels.ClosedByInterruptException at java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:184) at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:772) at org.apache.lucene.store.MMapDirectory$MMapIndexInput.init(MMapDirectory.java:225) at org.apache.lucene.store.MMapDirectory$MMapIndexInput.init(MMapDirectory.java:217) at org.apache.lucene.store.MMapDirectory.openInput(MMapDirectory.java:209) at org.apache.lucene.index.CompoundFileReader.init(CompoundFileReader.java:66) at org.apache.lucene.index.CompoundFileReader.init(CompoundFileReader.java:55) at org.apache.lucene.index.IndexWriter.getFieldInfos(IndexWriter.java:1193) at org.apache.lucene.index.IndexWriter.getCurrentFieldInfos(IndexWriter.java:1213) at org.apache.lucene.index.IndexWriter.init(IndexWriter.java:1149) at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexWriter(LuceneDataSource.java:590) ... 8 more Thx for any ideas. ciao, st.p. ___ 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
Re: [Neo4j] InvalidRecordException: Record[1983624] not in useRecord[1983624] not in use
Neo1.4.M04 community edition no self build.
2011/9/28 Mattias Persson matt...@neotechnology.com
Which version of neo4j did you use to import your data, was it a
downloadable package, from maven or building yourself from a branch?
2011/9/28 René Pickhardt r.pickha...@googlemail.com
hey everyone
I got a strange error message that a record is not in use if I call
hasRelationship() function even though I checked against null before! My
real purpose was to start the traverser but it exited with the same error
message. That is why I put the n.hasRelationship which also would not
work.
I imported a graph with 50 mio. nodes and about the same size of
relationships. (though I am about to import more relationships later on)
I
put 2 mio. nodes in a lucence index called article.
the counting variable t has the value 2385 (so the first 2385 calls work
fine) if I skip this node the same problem accoures again at t = 3239.
maybe it is usefull to say that I inserted the graph using the batch
inserter.
IndexHitsNode res = article.get(key, values[0]);
if (res!=null){
Node n = res.getSingle();
if (n!=null){
if (n.hasRelationship(DynamicRelationshipType.withName( UPDATE ),
Direction.BOTH)){
//n.traverse(Order.BREADTH_FIRST,StopEvaluator.DEPTH_ONE,
ReturnableEvaluator.ALL_BUT_START_NODE,DynamicRelationshipType.withName(
UPDATE ) );
t++;
}
}
callstack:
org.neo4j.kernel.impl.nioneo.store.InvalidRecordException:
Record[1983624]
not in useRecord[1983624] not in use
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getRecord(RelationshipStore.java:230)
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getChainRecord(RelationshipStore.java:337)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:114)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:97)
at
org.neo4j.kernel.impl.persistence.PersistenceManager.getMoreRelationships(PersistenceManager.java:108)
at
org.neo4j.kernel.impl.core.NodeManager.getMoreRelationships(NodeManager.java:603)
at
org.neo4j.kernel.impl.core.NodeImpl.getMoreRelationships(NodeImpl.java:351)
at
org.neo4j.kernel.impl.core.NodeImpl.loadInitialRelationships(NodeImpl.java:318)
at
org.neo4j.kernel.impl.core.NodeImpl.ensureRelationshipMapNotNull(NodeImpl.java:305)
at
org.neo4j.kernel.impl.core.NodeImpl.getAllRelationshipsOfType(NodeImpl.java:156)
at
org.neo4j.kernel.impl.core.NodeImpl.getRelationships(NodeImpl.java:236)
at
org.neo4j.kernel.impl.core.NodeImpl.hasRelationship(NodeImpl.java:576)
at
org.neo4j.kernel.impl.core.NodeProxy.hasRelationship(NodeProxy.java:109)
at IndexEvaluation.GenerateStreams(IndexEvaluation.java:124)
at IndexEvaluation.init(IndexEvaluation.java:98)
at EntryPoint.main(EntryPoint.java:20)
--
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Re: [Neo4j] InvalidRecordException: Record[1983624] not in useRecord[1983624] not in use
Why are you running a beta version?
On Sep 28, 2011, at 9:03 AM, René Pickhardt r.pickha...@googlemail.com
wrote:
Neo1.4.M04 community edition no self build.
2011/9/28 Mattias Persson matt...@neotechnology.com
Which version of neo4j did you use to import your data, was it a
downloadable package, from maven or building yourself from a branch?
2011/9/28 René Pickhardt r.pickha...@googlemail.com
hey everyone
I got a strange error message that a record is not in use if I call
hasRelationship() function even though I checked against null before! My
real purpose was to start the traverser but it exited with the same error
message. That is why I put the n.hasRelationship which also would not
work.
I imported a graph with 50 mio. nodes and about the same size of
relationships. (though I am about to import more relationships later on)
I
put 2 mio. nodes in a lucence index called article.
the counting variable t has the value 2385 (so the first 2385 calls work
fine) if I skip this node the same problem accoures again at t = 3239.
maybe it is usefull to say that I inserted the graph using the batch
inserter.
IndexHitsNode res = article.get(key, values[0]);
if (res!=null){
Node n = res.getSingle();
if (n!=null){
if (n.hasRelationship(DynamicRelationshipType.withName( UPDATE ),
Direction.BOTH)){
//n.traverse(Order.BREADTH_FIRST,StopEvaluator.DEPTH_ONE,
ReturnableEvaluator.ALL_BUT_START_NODE,DynamicRelationshipType.withName(
UPDATE ) );
t++;
}
}
callstack:
org.neo4j.kernel.impl.nioneo.store.InvalidRecordException:
Record[1983624]
not in useRecord[1983624] not in use
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getRecord(RelationshipStore.java:230)
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getChainRecord(RelationshipStore.java:337)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:114)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:97)
at
org.neo4j.kernel.impl.persistence.PersistenceManager.getMoreRelationships(PersistenceManager.java:108)
at
org.neo4j.kernel.impl.core.NodeManager.getMoreRelationships(NodeManager.java:603)
at
org.neo4j.kernel.impl.core.NodeImpl.getMoreRelationships(NodeImpl.java:351)
at
org.neo4j.kernel.impl.core.NodeImpl.loadInitialRelationships(NodeImpl.java:318)
at
org.neo4j.kernel.impl.core.NodeImpl.ensureRelationshipMapNotNull(NodeImpl.java:305)
at
org.neo4j.kernel.impl.core.NodeImpl.getAllRelationshipsOfType(NodeImpl.java:156)
at
org.neo4j.kernel.impl.core.NodeImpl.getRelationships(NodeImpl.java:236)
at
org.neo4j.kernel.impl.core.NodeImpl.hasRelationship(NodeImpl.java:576)
at
org.neo4j.kernel.impl.core.NodeProxy.hasRelationship(NodeProxy.java:109)
at IndexEvaluation.GenerateStreams(IndexEvaluation.java:124)
at IndexEvaluation.init(IndexEvaluation.java:98)
at EntryPoint.main(EntryPoint.java:20)
--
--
mobile: +49 (0)176 6433 2481
Skype: +49 (0)6131 / 4958926
Skype: rene.pickhardt
www.rene-pickhardt.de
http://www.beijing-china-blog.com
___
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--
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Hacker, Neo Technology
www.neotechnology.com
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Re: [Neo4j] InvalidRecordException: Record[1983624] not in useRecord[1983624] not in use
Hi Rene,
According to git log, 1,4.M04 was tagged 10/06/2011, while the fix for
a bug in the BatchInserterImpl that caused corrupted stores which gave
the message you are seeing is
https://github.com/neo4j/community/commit/71fbe4ac1174fad16a7bb154c9f78d3f1b377248
which has a date of 04/07/2011.
This makes 1.4.M06 the earliest release to use that does not have this
issue or, even better, go for 1.4.1 which is the latest stable
release. Since you are comfortable using milestones, 1.5.M01 might be
of interest to you.
http://neo4j.org/download has the links that you need.
hope that helped,
CG
2011/9/28 René Pickhardt r.pickha...@googlemail.com:
Neo1.4.M04 community edition no self build.
2011/9/28 Mattias Persson matt...@neotechnology.com
Which version of neo4j did you use to import your data, was it a
downloadable package, from maven or building yourself from a branch?
2011/9/28 René Pickhardt r.pickha...@googlemail.com
hey everyone
I got a strange error message that a record is not in use if I call
hasRelationship() function even though I checked against null before! My
real purpose was to start the traverser but it exited with the same error
message. That is why I put the n.hasRelationship which also would not
work.
I imported a graph with 50 mio. nodes and about the same size of
relationships. (though I am about to import more relationships later on)
I
put 2 mio. nodes in a lucence index called article.
the counting variable t has the value 2385 (so the first 2385 calls work
fine) if I skip this node the same problem accoures again at t = 3239.
maybe it is usefull to say that I inserted the graph using the batch
inserter.
IndexHitsNode res = article.get(key, values[0]);
if (res!=null){
Node n = res.getSingle();
if (n!=null){
if (n.hasRelationship(DynamicRelationshipType.withName( UPDATE ),
Direction.BOTH)){
//n.traverse(Order.BREADTH_FIRST,StopEvaluator.DEPTH_ONE,
ReturnableEvaluator.ALL_BUT_START_NODE,DynamicRelationshipType.withName(
UPDATE ) );
t++;
}
}
callstack:
org.neo4j.kernel.impl.nioneo.store.InvalidRecordException:
Record[1983624]
not in useRecord[1983624] not in use
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getRecord(RelationshipStore.java:230)
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getChainRecord(RelationshipStore.java:337)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:114)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:97)
at
org.neo4j.kernel.impl.persistence.PersistenceManager.getMoreRelationships(PersistenceManager.java:108)
at
org.neo4j.kernel.impl.core.NodeManager.getMoreRelationships(NodeManager.java:603)
at
org.neo4j.kernel.impl.core.NodeImpl.getMoreRelationships(NodeImpl.java:351)
at
org.neo4j.kernel.impl.core.NodeImpl.loadInitialRelationships(NodeImpl.java:318)
at
org.neo4j.kernel.impl.core.NodeImpl.ensureRelationshipMapNotNull(NodeImpl.java:305)
at
org.neo4j.kernel.impl.core.NodeImpl.getAllRelationshipsOfType(NodeImpl.java:156)
at
org.neo4j.kernel.impl.core.NodeImpl.getRelationships(NodeImpl.java:236)
at
org.neo4j.kernel.impl.core.NodeImpl.hasRelationship(NodeImpl.java:576)
at
org.neo4j.kernel.impl.core.NodeProxy.hasRelationship(NodeProxy.java:109)
at IndexEvaluation.GenerateStreams(IndexEvaluation.java:124)
at IndexEvaluation.init(IndexEvaluation.java:98)
at EntryPoint.main(EntryPoint.java:20)
--
--
mobile: +49 (0)176 6433 2481
Skype: +49 (0)6131 / 4958926
Skype: rene.pickhardt
www.rene-pickhardt.de
http://www.beijing-china-blog.com
___
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--
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Hacker, Neo Technology
www.neotechnology.com
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--
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Re: [Neo4j] Forward slashes in index values
Hi Tatham, I've closed off this issue in Github now: https://github.com/neo4j/community/issues/25 For all you Neo4j REST API client maintainers, this means there *WILL BE BREAKING CHANGES* to the Neo4j REST API in the 1.5 release. I'll try to ensure they're all very well documented in the manual, but following the URI above will show you how things look on the wire now. Tatham/Romiko/Josh/Nigel/Jake/and others, you have tweaks to make... Jim ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] InvalidRecordException: Record[1983624] not in useRecord[1983624] not in use
I'm curious to know how you found that old milestone also :) you picked the
one out of extremely few having some kind of data problems.
Den onsdagen den 28:e september 2011 skrev Chris Gioran
chris.gio...@neotechnology.com:
Hi Rene,
According to git log, 1,4.M04 was tagged 10/06/2011, while the fix for
a bug in the BatchInserterImpl that caused corrupted stores which gave
the message you are seeing is
https://github.com/neo4j/community/commit/71fbe4ac1174fad16a7bb154c9f78d3f1b377248
which has a date of 04/07/2011.
This makes 1.4.M06 the earliest release to use that does not have this
issue or, even better, go for 1.4.1 which is the latest stable
release. Since you are comfortable using milestones, 1.5.M01 might be
of interest to you.
http://neo4j.org/download has the links that you need.
hope that helped,
CG
2011/9/28 René Pickhardt r.pickha...@googlemail.com:
Neo1.4.M04 community edition no self build.
2011/9/28 Mattias Persson matt...@neotechnology.com
Which version of neo4j did you use to import your data, was it a
downloadable package, from maven or building yourself from a branch?
2011/9/28 René Pickhardt r.pickha...@googlemail.com
hey everyone
I got a strange error message that a record is not in use if I call
hasRelationship() function even though I checked against null before!
My
real purpose was to start the traverser but it exited with the same
error
message. That is why I put the n.hasRelationship which also would not
work.
I imported a graph with 50 mio. nodes and about the same size of
relationships. (though I am about to import more relationships later
on)
I
put 2 mio. nodes in a lucence index called article.
the counting variable t has the value 2385 (so the first 2385 calls
work
fine) if I skip this node the same problem accoures again at t = 3239.
maybe it is usefull to say that I inserted the graph using the batch
inserter.
IndexHitsNode res = article.get(key, values[0]);
if (res!=null){
Node n = res.getSingle();
if (n!=null){
if (n.hasRelationship(DynamicRelationshipType.withName( UPDATE ),
Direction.BOTH)){
//n.traverse(Order.BREADTH_FIRST,StopEvaluator.DEPTH_ONE,
ReturnableEvaluator.ALL_BUT_START_NODE,DynamicRelationshipType.withName(
UPDATE ) );
t++;
}
}
callstack:
org.neo4j.kernel.impl.nioneo.store.InvalidRecordException:
Record[1983624]
not in useRecord[1983624] not in use
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getRecord(RelationshipStore.java:230)
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getChainRecord(RelationshipStore.java:337)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:114)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:97)
at
org.neo4j.kernel.impl.persistence.PersistenceManager.getMoreRelationships(PersistenceManager.java:108)
at
org.neo4j.kernel.impl.core.NodeManager.getMoreRelationships(NodeManager.java:603)
at
org.neo4j.kernel.impl.core.NodeImpl.getMoreRelationships(NodeImpl.java:351)
at
org.neo4j.kernel.impl.core.NodeImpl.loadInitialRelationships(NodeImpl.java:318)
at
org.neo4j.kernel.impl.core.NodeImpl.ensureRelationshipMapNotNull(NodeImpl.java:305)
at
org.neo4j.kernel.impl.core.NodeImpl.getAllRelationshipsOfType(NodeImpl.java:156)
at
org.neo4j.kernel.impl.core.NodeImpl.getRelationships(NodeImpl.java:236)
at
org.neo4j.kernel.impl.core.NodeImpl.hasRelationship(NodeImpl.java:576)
at
org.neo4j.kernel.impl.core.NodeProxy.hasRelationship(NodeProxy.java:109)
at IndexEvaluation.GenerateStreams(IndexEvaluation.java:124)
at IndexEvaluation.init(IndexEvaluation.java:98)
at EntryPoint.main(EntryPoint.
--
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Hacker, Neo Technology
www.neotechnology.com
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[Neo4j] neo4j-ha and spring-data-graph
Hi,
I'm trying to do a POC using neo4j and spring-data-graph. I have configured 3
VMs running zookeeper and deployed a simple webapp to tomcat on each instance.
I've run into a bit of a problem with replication though. I can only see data
being replicated when I restart each tomcat instance – which is obviously no
good.
I have the following in my application context:
bean id=graphDatabaseService
class=org.neo4j.kernel.HighlyAvailableGraphDatabase destroy-method=shutdown
scope=singleton
constructor-arg index=0 value=${database.path}/
constructor-arg index=1
map
entry key=ha.machine_id value=${server.id} /
entry key=ha.server value=zoo1:${ha.server.port} /
entry key=ha.zoo_keeper_servers value=${zookeeper.servers}
/
entry key=enable_remote_shell value=port=1331 /
entry key=pull_interval value=1 /
/map
/constructor-arg
/bean
I am starting zoo1 first so that it becomes the master. Server.id is
allocated at runtime from a system property set on each machine –Dserver.id=x
in the tomcat startup script. From what I understand the pull_interval=1
setting means that data should be synchronized once per second, yet I am only
seeing it happen when the servers are bounced. Am I missing something?
Thanks,
Toby.
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Re: [Neo4j] threads on embeddedGraphDb
(inline response.) Am 28.09.2011 14:40, schrieb Peter Neubauer: Hi there, Neo4j in itself is thread safe, so you can pass it around as a singleton and access it from different Java threads. knowing that it should work helped me to make it work. my mistake probably was to pass the instance of EmbeddedGraphDb as a final parameter to the other threads, because it didn't throw up an exception when i took the final keyword out and i can live with checkstyle having a problem with a non-final parameter. The HighlyAvailableGraphDatabase for scaling over multiple machines is part of neo4j-enterprise, so you need to update your maven dependencies to change community for enterprise. Does that help? Cheers, /peter neubauer thankyousoverymuch, community will do for now. st.p. from berlin 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 Wed, Sep 28, 2011 at 2:26 PM, st.past...@web.de wrote: hi, while i was not trying to use threads, everything went fine. now i need concurrent java threads to access the same (embedded?) graph database. neo4j-manual.pdf for 1.4.1 says in section 1.1.2. that i should use HighlyAvailableGraphDatabase, which is no longer there in 1.5.1 as it seems. i have not looked into server and rest api yet, so is there a way to do a threaded app with say a queue thread and n worker threads inside the jvm that all do their own transactions on the same database location? the following exception is what i got for assigning the queue thread's embedded db to the worker threads, i guess. Exception in thread Thread-6 java.lang.RuntimeException: java.nio.channels.ClosedByInterruptException at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexWriter(LuceneDataSource.java:603) at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexSearcher(LuceneDataSource.java:486) at org.neo4j.index.impl.lucene.LuceneIndex.query(LuceneIndex.java:248) at org.neo4j.index.impl.lucene.LuceneIndex$RelationshipIndex.get(LuceneIndex.java:480) at de.stp.DatabaseNeo4j.removeUrlQueue(DatabaseNeo4j.java:777) at de.stp.util.BufferNeo4j.next(BufferNeo4j.java:194) at de.stp.RoboNeo4j.nächsterSchritt(RoboNeo4j.java:452) at de.stp.RoboNeo4j.run(RoboNeo4j.java:436) at java.lang.Thread.run(Thread.java:619) Caused by: java.nio.channels.ClosedByInterruptException at java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:184) at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:772) at org.apache.lucene.store.MMapDirectory$MMapIndexInput.init(MMapDirectory.java:225) at org.apache.lucene.store.MMapDirectory$MMapIndexInput.init(MMapDirectory.java:217) at org.apache.lucene.store.MMapDirectory.openInput(MMapDirectory.java:209) at org.apache.lucene.index.CompoundFileReader.init(CompoundFileReader.java:66) at org.apache.lucene.index.CompoundFileReader.init(CompoundFileReader.java:55) at org.apache.lucene.index.IndexWriter.getFieldInfos(IndexWriter.java:1193) at org.apache.lucene.index.IndexWriter.getCurrentFieldInfos(IndexWriter.java:1213) at org.apache.lucene.index.IndexWriter.init(IndexWriter.java:1149) at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexWriter(LuceneDataSource.java:590) ... 8 more Thx for any ideas. ciao, st.p. ___ 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] InvalidRecordException: Record[1983624] not in useRecord[1983624] not in use
Hey guys,
I don't know how I found the old milestone. I was downloading it once I
started using neo4j.
I will just migrate to the current stable version and tell you afterwards if
I still have problems. by your comments I guess the problem will be solved.
Thanks so far!
best regards René
2011/9/28 Mattias Persson matt...@neotechnology.com
I'm curious to know how you found that old milestone also :) you picked the
one out of extremely few having some kind of data problems.
Den onsdagen den 28:e september 2011 skrev Chris Gioran
chris.gio...@neotechnology.com:
Hi Rene,
According to git log, 1,4.M04 was tagged 10/06/2011, while the fix for
a bug in the BatchInserterImpl that caused corrupted stores which gave
the message you are seeing is
https://github.com/neo4j/community/commit/71fbe4ac1174fad16a7bb154c9f78d3f1b377248
which has a date of 04/07/2011.
This makes 1.4.M06 the earliest release to use that does not have this
issue or, even better, go for 1.4.1 which is the latest stable
release. Since you are comfortable using milestones, 1.5.M01 might be
of interest to you.
http://neo4j.org/download has the links that you need.
hope that helped,
CG
2011/9/28 René Pickhardt r.pickha...@googlemail.com:
Neo1.4.M04 community edition no self build.
2011/9/28 Mattias Persson matt...@neotechnology.com
Which version of neo4j did you use to import your data, was it a
downloadable package, from maven or building yourself from a branch?
2011/9/28 René Pickhardt r.pickha...@googlemail.com
hey everyone
I got a strange error message that a record is not in use if I call
hasRelationship() function even though I checked against null before!
My
real purpose was to start the traverser but it exited with the same
error
message. That is why I put the n.hasRelationship which also would not
work.
I imported a graph with 50 mio. nodes and about the same size of
relationships. (though I am about to import more relationships later
on)
I
put 2 mio. nodes in a lucence index called article.
the counting variable t has the value 2385 (so the first 2385 calls
work
fine) if I skip this node the same problem accoures again at t =
3239.
maybe it is usefull to say that I inserted the graph using the batch
inserter.
IndexHitsNode res = article.get(key, values[0]);
if (res!=null){
Node n = res.getSingle();
if (n!=null){
if (n.hasRelationship(DynamicRelationshipType.withName( UPDATE ),
Direction.BOTH)){
//n.traverse(Order.BREADTH_FIRST,StopEvaluator.DEPTH_ONE,
ReturnableEvaluator.ALL_BUT_START_NODE,DynamicRelationshipType.withName(
UPDATE ) );
t++;
}
}
callstack:
org.neo4j.kernel.impl.nioneo.store.InvalidRecordException:
Record[1983624]
not in useRecord[1983624] not in use
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getRecord(RelationshipStore.java:230)
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getChainRecord(RelationshipStore.java:337)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:114)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:97)
at
org.neo4j.kernel.impl.persistence.PersistenceManager.getMoreRelationships(PersistenceManager.java:108)
at
org.neo4j.kernel.impl.core.NodeManager.getMoreRelationships(NodeManager.java:603)
at
org.neo4j.kernel.impl.core.NodeImpl.getMoreRelationships(NodeImpl.java:351)
at
org.neo4j.kernel.impl.core.NodeImpl.loadInitialRelationships(NodeImpl.java:318)
at
org.neo4j.kernel.impl.core.NodeImpl.ensureRelationshipMapNotNull(NodeImpl.java:305)
at
org.neo4j.kernel.impl.core.NodeImpl.getAllRelationshipsOfType(NodeImpl.java:156)
at
org.neo4j.kernel.impl.core.NodeImpl.getRelationships(NodeImpl.java:236)
at
org.neo4j.kernel.impl.core.NodeImpl.hasRelationship(NodeImpl.java:576)
at
org.neo4j.kernel.impl.core.NodeProxy.hasRelationship(NodeProxy.java:109)
at IndexEvaluation.GenerateStreams(IndexEvaluation.java:124)
at IndexEvaluation.init(IndexEvaluation.java:98)
at EntryPoint.main(EntryPoint.
--
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Hacker, Neo Technology
www.neotechnology.com
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Re: [Neo4j] InvalidRecordException: Record[1983624] not in useRecord[1983624] not in use
Hi, René.
I recognized your error almost immediately, since we encountered it in an early
1.4 beta. ;-)
I think you'll have a good result if you can switch to the 1.4.1 release!
Best,
Rick
-Original Message-
From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On
Behalf Of René Pickhardt
Sent: Wednesday, September 28, 2011 10:29 AM
To: Neo4j user discussions
Subject: Re: [Neo4j] InvalidRecordException: Record[1983624] not in
useRecord[1983624] not in use
Hey guys,
I don't know how I found the old milestone. I was downloading it once I
started using neo4j.
I will just migrate to the current stable version and tell you afterwards if
I still have problems. by your comments I guess the problem will be solved.
Thanks so far!
best regards René
2011/9/28 Mattias Persson matt...@neotechnology.com
I'm curious to know how you found that old milestone also :) you picked the
one out of extremely few having some kind of data problems.
Den onsdagen den 28:e september 2011 skrev Chris Gioran
chris.gio...@neotechnology.com:
Hi Rene,
According to git log, 1,4.M04 was tagged 10/06/2011, while the fix for
a bug in the BatchInserterImpl that caused corrupted stores which gave
the message you are seeing is
https://github.com/neo4j/community/commit/71fbe4ac1174fad16a7bb154c9f78d3f1b377248
which has a date of 04/07/2011.
This makes 1.4.M06 the earliest release to use that does not have this
issue or, even better, go for 1.4.1 which is the latest stable
release. Since you are comfortable using milestones, 1.5.M01 might be
of interest to you.
http://neo4j.org/download has the links that you need.
hope that helped,
CG
2011/9/28 René Pickhardt r.pickha...@googlemail.com:
Neo1.4.M04 community edition no self build.
2011/9/28 Mattias Persson matt...@neotechnology.com
Which version of neo4j did you use to import your data, was it a
downloadable package, from maven or building yourself from a branch?
2011/9/28 René Pickhardt r.pickha...@googlemail.com
hey everyone
I got a strange error message that a record is not in use if I call
hasRelationship() function even though I checked against null before!
My
real purpose was to start the traverser but it exited with the same
error
message. That is why I put the n.hasRelationship which also would not
work.
I imported a graph with 50 mio. nodes and about the same size of
relationships. (though I am about to import more relationships later
on)
I
put 2 mio. nodes in a lucence index called article.
the counting variable t has the value 2385 (so the first 2385 calls
work
fine) if I skip this node the same problem accoures again at t =
3239.
maybe it is usefull to say that I inserted the graph using the batch
inserter.
IndexHitsNode res = article.get(key, values[0]);
if (res!=null){
Node n = res.getSingle();
if (n!=null){
if (n.hasRelationship(DynamicRelationshipType.withName( UPDATE ),
Direction.BOTH)){
//n.traverse(Order.BREADTH_FIRST,StopEvaluator.DEPTH_ONE,
ReturnableEvaluator.ALL_BUT_START_NODE,DynamicRelationshipType.withName(
UPDATE ) );
t++;
}
}
callstack:
org.neo4j.kernel.impl.nioneo.store.InvalidRecordException:
Record[1983624]
not in useRecord[1983624] not in use
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getRecord(RelationshipStore.java:230)
at
org.neo4j.kernel.impl.nioneo.store.RelationshipStore.getChainRecord(RelationshipStore.java:337)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:114)
at
org.neo4j.kernel.impl.nioneo.xa.ReadTransaction.getMoreRelationships(ReadTransaction.java:97)
at
org.neo4j.kernel.impl.persistence.PersistenceManager.getMoreRelationships(PersistenceManager.java:108)
at
org.neo4j.kernel.impl.core.NodeManager.getMoreRelationships(NodeManager.java:603)
at
org.neo4j.kernel.impl.core.NodeImpl.getMoreRelationships(NodeImpl.java:351)
at
org.neo4j.kernel.impl.core.NodeImpl.loadInitialRelationships(NodeImpl.java:318)
at
org.neo4j.kernel.impl.core.NodeImpl.ensureRelationshipMapNotNull(NodeImpl.java:305)
at
org.neo4j.kernel.impl.core.NodeImpl.getAllRelationshipsOfType(NodeImpl.java:156)
at
org.neo4j.kernel.impl.core.NodeImpl.getRelationships(NodeImpl.java:236)
at
org.neo4j.kernel.impl.core.NodeImpl.hasRelationship(NodeImpl.java:576)
at
org.neo4j.kernel.impl.core.NodeProxy.hasRelationship(NodeProxy.java:109)
at IndexEvaluation.GenerateStreams(IndexEvaluation.java:124)
at IndexEvaluation.init(IndexEvaluation.java:98)
at EntryPoint.main(EntryPoint.
--
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Hacker, Neo Technology
www.neotechnology.com
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Re: [Neo4j] neo4j-ha and spring-data-graph
Could you also share the property files of the 3 vm's ?
Thanks
Michael
Am 28.09.2011 um 15:59 schrieb Toby O'Rourke:
Hi,
I'm trying to do a POC using neo4j and spring-data-graph. I have configured 3
VMs running zookeeper and deployed a simple webapp to tomcat on each
instance. I've run into a bit of a problem with replication though. I can
only see data being replicated when I restart each tomcat instance – which is
obviously no good.
I have the following in my application context:
bean id=graphDatabaseService
class=org.neo4j.kernel.HighlyAvailableGraphDatabase
destroy-method=shutdown
scope=singleton
constructor-arg index=0 value=${database.path}/
constructor-arg index=1
map
entry key=ha.machine_id value=${server.id} /
entry key=ha.server value=zoo1:${ha.server.port} /
entry key=ha.zoo_keeper_servers
value=${zookeeper.servers} /
entry key=enable_remote_shell value=port=1331 /
entry key=pull_interval value=1 /
/map
/constructor-arg
/bean
I am starting zoo1 first so that it becomes the master. Server.id is
allocated at runtime from a system property set on each machine –Dserver.id=x
in the tomcat startup script. From what I understand the pull_interval=1
setting means that data should be synchronized once per second, yet I am only
seeing it happen when the servers are bounced. Am I missing something?
Thanks,
Toby.
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Re: [Neo4j] Some questions about design when using neo4j
Hey, If you want to play with JUNG over Neo4j, you can do it via TinkerPop. Graph g = new Neo4jGraph(/tmp/neo4j); GraphJung jung = new GraphJung(g); That GraphJung object is a implementation of the JUNG Interfaces and can be processed by the JUNG algorithms package. https://github.com/tinkerpop/blueprints/wiki/JUNG-Ouplementation HTH, Marko. http://markorodriguez.com On Sep 28, 2011, at 1:06 AM, Peter Neubauer wrote: Gen, I guess there is nothing out of the box right now, but you could get inspiration from http://jung.sourceforge.net/doc/api/index.html, especially http://jung.sourceforge.net/doc/api/edu/uci/ics/jung/algorithms/flows/EdmondsKarpMaxFlow.html and implement one or just use it on a toy graph to test it out? 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 Sat, Sep 3, 2011 at 12:33 AM, Benjamin Gustafsson benjamingustafs...@gmail.com wrote: Just in case there are any graph experts out there that want to exercise their brains. (Its quite a while since I studied algorithms and optimization regarding graphs. :-) I'm able to implement a algorithm described in pseudocode (if anyone knows a good algorithm for my special case below). I have the transportation problem and need to find a preferably small (not necessarily smallest) set of nodes that transports a certain amount of credit/commodity from source node S to sink node T. All edges have a capacity stated as a attribute for the edge, this can be read while traversing the graph. Transportation cost for commodity/credit in the graph is zero. The only cost in this graph problem is computation time to *find a set of paths delivering all the commodity*(in my case credit). The path lengths chosen are not important. (This is the standard ripplepay problem, but I didn't like the algorithms used by the original ripplepay implementation. It does not scale up to millions of users. It is not fast enough.) http://en.wikipedia.org/wiki/Transportation_network_%28graph_theory%29 And I also need a quick way of analysing if it is possible to send all commodity across the network. If the amount commodity to be sent is lower than max flow. (lower than min cut). There will initially be clusters with very few edges connecting the clusters. If the nodes are in different clusters the min cut can be really easy/*quick* to find (if we do it the right way). http://en.wikipedia.org/wiki/Max-flow_min-cut_theorem Any implementations for neo4j already available regarding my special case? -- //Benjamin Gustafsson ___ 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] neo4j-ha and spring-data-graph
Hi,
I'm not quite sure which property files you're talking about. The
configuration passed to HighlyAvailableGraphDatabase comes from the map
specified as a constructor argument directly in the spring Context.
database.path, server.id, ha.server.port, and zookeeper.servers are set by
system properties when tomcat is started so for each server:
# VM1
export JAVA_OPTS=-Dserver.id=1 -Dha.server.port=6001
-Ddatabase.path=/home/ubuntu/db
-Dzookeeper.servers=zoo1:2181,zoo2:2181,zoo3:2181
# VM2
export JAVA_OPTS=-Dserver.id=2 -Dha.server.port=6001
-Ddatabase.path=/home/ubuntu/db
-Dzookeeper.servers=zoo1:2181,zoo2:2181,zoo3:2181
# VM3
export JAVA_OPTS=-Dserver.id=3 -Dha.server.port=6001
-Ddatabase.path=/home/ubuntu/db
-Dzookeeper.servers=zoo1:2181,zoo2:2181,zoo3:2181
Written as a properties file, for one server, they would look like this:
ha.machine_id=1
ha.server=zoo1:6001
ha.zoo_keeper_servers=zoo1:2181,zoo2:2181,zoo3:2181
enable_remote_shell=port=1331
pull_interval=1
But looking at the sample code on the wiki, I'm just short cutting it a
bit by doing it in the Spring Context rather than parsing a properties
file in a main method? In terms of the zookeeper config, zoo.cfg looks
like this:
tickTime=2000
dataDir=/var/lib/zookeeper
clientPort=2181
initLimit=5
syncLimit=2
server.1=zoo1:2888:3888
server.2=zoo2:2888:3888
server.3=zoo3:2888:3888
Should I be including some other config?
Thanks,
Toby.
On 28/09/2011 15:53, Michael Hunger michael.hun...@neotechnology.com
wrote:
Could you also share the property files of the 3 vm's ?
Thanks
Michael
Am 28.09.2011 um 15:59 schrieb Toby O'Rourke:
Hi,
I'm trying to do a POC using neo4j and spring-data-graph. I have
configured 3 VMs running zookeeper and deployed a simple webapp to
tomcat on each instance. I've run into a bit of a problem with
replication though. I can only see data being replicated when I restart
each tomcat instance which is obviously no good.
I have the following in my application context:
bean id=graphDatabaseService
class=org.neo4j.kernel.HighlyAvailableGraphDatabase
destroy-method=shutdown
scope=singleton
constructor-arg index=0 value=${database.path}/
constructor-arg index=1
map
entry key=ha.machine_id value=${server.id} /
entry key=ha.server value=zoo1:${ha.server.port} /
entry key=ha.zoo_keeper_servers
value=${zookeeper.servers} /
entry key=enable_remote_shell value=port=1331 /
entry key=pull_interval value=1 /
/map
/constructor-arg
/bean
I am starting zoo1 first so that it becomes the master. Server.id is
allocated at runtime from a system property set on each machine
Dserver.id=x in the tomcat startup script. From what I understand the
pull_interval=1 setting means that data should be synchronized once per
second, yet I am only seeing it happen when the servers are bounced. Am
I missing something?
Thanks,
Toby.
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Re: [Neo4j] neo4j-ha and spring-data-graph
Could you also get the /home/ubuntu/db/messages.log of each of the 3 instances
to see if there are any issues with the HA communication?
Thanks so much,
Michael
Am 28.09.2011 um 18:11 schrieb Toby O'Rourke:
Hi,
I'm not quite sure which property files you're talking about. The
configuration passed to HighlyAvailableGraphDatabase comes from the map
specified as a constructor argument directly in the spring Context.
database.path, server.id, ha.server.port, and zookeeper.servers are set by
system properties when tomcat is started so for each server:
# VM1
export JAVA_OPTS=-Dserver.id=1 -Dha.server.port=6001
-Ddatabase.path=/home/ubuntu/db
-Dzookeeper.servers=zoo1:2181,zoo2:2181,zoo3:2181
# VM2
export JAVA_OPTS=-Dserver.id=2 -Dha.server.port=6001
-Ddatabase.path=/home/ubuntu/db
-Dzookeeper.servers=zoo1:2181,zoo2:2181,zoo3:2181
# VM3
export JAVA_OPTS=-Dserver.id=3 -Dha.server.port=6001
-Ddatabase.path=/home/ubuntu/db
-Dzookeeper.servers=zoo1:2181,zoo2:2181,zoo3:2181
Written as a properties file, for one server, they would look like this:
ha.machine_id=1
ha.server=zoo1:6001
ha.zoo_keeper_servers=zoo1:2181,zoo2:2181,zoo3:2181
enable_remote_shell=port=1331
pull_interval=1
But looking at the sample code on the wiki, I'm just short cutting it a
bit by doing it in the Spring Context rather than parsing a properties
file in a main method? In terms of the zookeeper config, zoo.cfg looks
like this:
tickTime=2000
dataDir=/var/lib/zookeeper
clientPort=2181
initLimit=5
syncLimit=2
server.1=zoo1:2888:3888
server.2=zoo2:2888:3888
server.3=zoo3:2888:3888
Should I be including some other config?
Thanks,
Toby.
On 28/09/2011 15:53, Michael Hunger michael.hun...@neotechnology.com
wrote:
Could you also share the property files of the 3 vm's ?
Thanks
Michael
Am 28.09.2011 um 15:59 schrieb Toby O'Rourke:
Hi,
I'm trying to do a POC using neo4j and spring-data-graph. I have
configured 3 VMs running zookeeper and deployed a simple webapp to
tomcat on each instance. I've run into a bit of a problem with
replication though. I can only see data being replicated when I restart
each tomcat instance which is obviously no good.
I have the following in my application context:
bean id=graphDatabaseService
class=org.neo4j.kernel.HighlyAvailableGraphDatabase
destroy-method=shutdown
scope=singleton
constructor-arg index=0 value=${database.path}/
constructor-arg index=1
map
entry key=ha.machine_id value=${server.id} /
entry key=ha.server value=zoo1:${ha.server.port} /
entry key=ha.zoo_keeper_servers
value=${zookeeper.servers} /
entry key=enable_remote_shell value=port=1331 /
entry key=pull_interval value=1 /
/map
/constructor-arg
/bean
I am starting zoo1 first so that it becomes the master. Server.id is
allocated at runtime from a system property set on each machine
Dserver.id=x in the tomcat startup script. From what I understand the
pull_interval=1 setting means that data should be synchronized once per
second, yet I am only seeing it happen when the servers are bounced. Am
I missing something?
Thanks,
Toby.
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Re: [Neo4j] InvalidRecordException: Record[1983624] not in useRecord[1983624] not in use
I used the current stable release and the problem did not arise anymore but
I got new problems.
for many nodes even though (according to the data set they should have
relations) the
function (n.hasRelationship(DynamicRelationshipType.withName( UPDATE ),
Direction.BOTH)) does not stop. It just seems to jump into an endless loop
;(
I don't think I made a mistake in the code for the batch inserter but i just
attached it. My insertion contains of two steps:
first I create many node in the graph and store them also in an index:
batchArticle. I do not query agains the index to check if a node with this
key already existed. But my keys are unique.
private void AddBatchNode(String key, String title){
MapString,Object properties = new HashMapString,Object();
properties.put( key, key );
properties.put( title, title );
properties.put( timestamp, 1 );
long node = inserter.createNode( properties );
properties = MapUtil.map( key, key );
batchArticle.add( node, properties );
}
then I attach many updates (also nodes encoded via timestamp) to every node
and connect them via a relationship.
private void BatchUpdate(String timestamp, String key) {
if (batchArticle.get(key, key).getSingle()!=null){
long node = batchArticle.get(key, key).getSingle();
MapString,Object properties = new HashMapString,Object();
properties.put( timestamp, timestamp );
long ci = inserter.createNode( properties );
inserter.createRelationship( node, ci, DynamicRelationshipType.withName(
UPDATE ),null);
}
}
the last step (i did not implement this) is to connect the nodes from the
first steps via friendship relations. But I wanted to do some testing
first...
anyone knows of this problem?
2011/9/28 Rick Bullotta rick.bullo...@thingworx.com
Hi, René.
I recognized your error almost immediately, since we encountered it in an
early 1.4 beta. ;-)
I think you'll have a good result if you can switch to the 1.4.1 release!
Best,
Rick
-Original Message-
From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org]
On Behalf Of René Pickhardt
Sent: Wednesday, September 28, 2011 10:29 AM
To: Neo4j user discussions
Subject: Re: [Neo4j] InvalidRecordException: Record[1983624] not in
useRecord[1983624] not in use
Hey guys,
I don't know how I found the old milestone. I was downloading it once I
started using neo4j.
I will just migrate to the current stable version and tell you afterwards
if
I still have problems. by your comments I guess the problem will be solved.
Thanks so far!
best regards René
2011/9/28 Mattias Persson matt...@neotechnology.com
I'm curious to know how you found that old milestone also :) you picked
the
one out of extremely few having some kind of data problems.
Den onsdagen den 28:e september 2011 skrev Chris Gioran
chris.gio...@neotechnology.com:
Hi Rene,
According to git log, 1,4.M04 was tagged 10/06/2011, while the fix for
a bug in the BatchInserterImpl that caused corrupted stores which gave
the message you are seeing is
https://github.com/neo4j/community/commit/71fbe4ac1174fad16a7bb154c9f78d3f1b377248
which has a date of 04/07/2011.
This makes 1.4.M06 the earliest release to use that does not have this
issue or, even better, go for 1.4.1 which is the latest stable
release. Since you are comfortable using milestones, 1.5.M01 might be
of interest to you.
http://neo4j.org/download has the links that you need.
hope that helped,
CG
2011/9/28 René Pickhardt r.pickha...@googlemail.com:
Neo1.4.M04 community edition no self build.
2011/9/28 Mattias Persson matt...@neotechnology.com
Which version of neo4j did you use to import your data, was it a
downloadable package, from maven or building yourself from a branch?
2011/9/28 René Pickhardt r.pickha...@googlemail.com
hey everyone
I got a strange error message that a record is not in use if I call
hasRelationship() function even though I checked against null
before!
My
real purpose was to start the traverser but it exited with the same
error
message. That is why I put the n.hasRelationship which also would
not
work.
I imported a graph with 50 mio. nodes and about the same size of
relationships. (though I am about to import more relationships
later
on)
I
put 2 mio. nodes in a lucence index called article.
the counting variable t has the value 2385 (so the first 2385 calls
work
fine) if I skip this node the same problem accoures again at t =
3239.
maybe it is usefull to say that I inserted the graph using the
batch
inserter.
IndexHitsNode res = article.get(key, values[0]);
if (res!=null){
Node n = res.getSingle();
if (n!=null){
if (n.hasRelationship(DynamicRelationshipType.withName( UPDATE ),
Direction.BOTH)){
//n.traverse(Order.BREADTH_FIRST,StopEvaluator.DEPTH_ONE,
Re: [Neo4j] REST, Transactions and Uniqueness
Peter,
I feel uniqueness has been a recurring theme in neo4j applications,
especially when it's used heavily on algorithms traversing existing
data. it would be great if it's supported in kernel level:
interface NodeUniquenessConstraint
{
public Node getNode();
public void setupNode(Node newNode);
}
public Node getOrCreateNode(NodeUniquenessConstraint constraint)
{
// Preparation, acquires lock, etc.
Node n = constraint.getNode();
if(n == null)
{
n = createNode();
constraint.setupNode(n);
}
...
return n;
}
or, there is something similar already implemented?
On Tue, Sep 27, 2011 at 9:38 PM, Peter Neubauer
peter.neuba...@neotechnology.com wrote:
Guys,
Maps are now supported as parameters, look at the Gremlin plugin för
reference in the docs. Will add that for parameters to the cypher plugin
too.
Thanks for chipping in!
/peter
Sent from my phone.
On Sep 27, 2011 8:12 PM, Tony Wooster twoos...@gmail.com wrote:
Hi Linan,
That's essentially what I implemented, but the logic just became that
much more tortured when going over REST. Like I said, less of a Java
programmer. The implementation I came up with on the REST side (hacky
though it may be) was this:
@Description( An extension to help maintain unique relationships )
public class IndexTester extends ServerPlugin
{
@Name( error_if_in_node_index )
@Description( Will return a 4xx error if a key/value pair is found in
+
a given index. Also errors if the index doesn't
exist.)
@PluginTarget( GraphDatabaseService.class )
public Boolean errorIfInNodeIndex(
@Source GraphDatabaseService graphDb,
@Description( Name of the index to earch. )
@Parameter( name = indexName ) String indexName,
@Description( Name of key to search. )
@Parameter( name = key ) String key,
@Description( Value to search for. )
@Parameter( name = value ) String value )
throws BadInputException
{
if ( !graphDb.index().existsForNodes( indexName ) )
throw new BadInputException(Index doesn't exist, new
NotFoundException());
IndexNode index = graphDb.index().forNodes( indexName );
if (index.get(key, value).size() 0)
throw new BadInputException(Key/value pair found in index);
return null;
}
}
I'm still not entirely certain that this is the appropriate way to go;
probably a better solution would be a more general add node with
unique, indexed fields command that's slightly more functional than
this batch-operation-quirks based hack. As an aside -- does anyone
know when/if lists of maps for parameters will be implemented for REST
plugins?
Thanks for the response!
-T
On Thu, Sep 22, 2011 at 4:57 PM, Linan Wang tali.w...@gmail.com wrote:
Hi,
i had the issue few days ago and thanks to McKinley I got a workable
solution. i think the best way to do is through unmanaged extension.
the overhead of multiple REST calls could make the matter more
complex.
here is part of my ObjectFactory class. in my situation it's an
external id needs to be uniq. feel free to correct my codes :) the
performance is not ideal though. on my imac I got around 50 insertions
per sec. the bottle neck is not memory.
public T get(long externalId)
{
// try asynchronized read first;
IndexNode idx = getDefaultNodeIndex();
IndexHitsNode h = idx.get(IDX_KEY_EXTERNAL_ID,
externalId);
Node n = h.getSingle();
h.close();
if(n != null)
return wrap(n);
// if not found, try synchronized version;
return null;
}
public T getOrCreate(long externalId)
{
T ret = get( externalId );
if(ret != null)
return ret;
// if not found, try synchronized version;
return synchronizedGetOrCreate(externalId);
}
private synchronized T synchronizedGetOrCreate(long externalId)
{
// Just in case!
T ret = get( externalId );
if(ret != null)
return ret;
IndexNode idx = getDefaultNodeIndex();
Node n = null;
Transaction tx = db.beginTx();
try{
n = db.createNode();
// set property
n.setProperty(AbstractObject.EXTERNAL_ID_KEY,
externalId);
// add to default index;
idx.add(n, IDX_KEY_EXTERNAL_ID, externalId);
tx.success();
}catch(Exception e){
tx.failure();
}finally{
tx.finish();
[Neo4j] See the graph in the Neo4J embedded db
Hello, I have stored triples into the Neo4J embedded db, now I want to see the graph or data in the db. How can I do it? Thanks, ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] See the graph in the Neo4J embedded db
You could use neoclipse to see it. Sent from my BlackBerry® wireless device -Original Message- From: tt6 [via Neo4j Community Discussions] ml-node+s438527n3377257...@n3.nabble.com Date: Wed, 28 Sep 2011 13:23:29 To: noppanitnoppani...@gmail.com Subject: [Neo4j] See the graph in the Neo4J embedded db Hello, I have stored triples into the Neo4J embedded db, now I want to see the graph or data in the db. How can I do it? Thanks, ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ If you reply to this email, your message will be added to the discussion below: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-See-the-graph-in-the-Neo4J-embedded-db-tp3377257p3377257.html To start a new topic under Neo4j Community Discussions, email ml-node+s438527n438527...@n3.nabble.com To unsubscribe from Neo4j Community Discussions, visit http://neo4j-community-discussions.438527.n3.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_codenode=438527code=bm9wcGFuaXQuY0BnbWFpbC5jb218NDM4NTI3fDExOTIzNzAyNjk= -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-See-the-graph-in-the-Neo4J-embedded-db-tp3377257p3377301.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] Forward slashes in index values
Thanks for the heads up, Jim. On a tangentially related note, I filed this request: https://github.com/neo4j/community/issues/35 Basically, in the future, it would be useful to have a way to determine the server version via REST so the various clients can account for differences in the protocol like this. Thanks! -- Josh Adell -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Forward-slashes-in-index-values-tp3347515p3377304.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] Neo4J Rest server support SPARQL??
Hi, After adding nodes and relationships into Neo4J REST server using REST API. How do I read data from the database using SPARQL? Does the database support SPARQL? Regards, ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4J Rest server support SPARQL??
Hey, After adding nodes and relationships into Neo4J REST server using REST API. How do I read data from the database using SPARQL? Does the database support SPARQL? Neo4j is not an RDF database in its raw form. Its data model is a bit more complicated than RDF and as such, is not amenable to SPARQL which assumes only an edge-labeled graph. However, with that said, the pattern matching functionality of Cypher is somewhat analogous to SPARQL so you might find solace in that. Moreover, you can also use Gremlin for pattern matching, though it doesn't have the same look-and-feel as SPARQL (see https://github.com/tinkerpop/gremlin/wiki/SPARQL-vs.-Gremlin ). Next. If you actually have used GraphSail (via Blueprints) to model your data as an RDF graph in Neo4j, then you can access it via Sesame SPARQL engine --- however, as it stands, not via the Neo4j REST server without rolling your own extension. If you are so inclined, you can either use Rexster (http://rexster.tinkerpop.com) and its SPARQL kibble or steal the code in Rexster's SPARQL kibble and make it work for Neo4j Server (shouldn't be more than an a few hours work). see http://rexster-kibbles.tinkerpop.com/ https://github.com/tinkerpop/rexster-kibbles/tree/master/sparql-kibble Hope that is clear, Marko. http://markorodriguez.com ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] Execute SPARQL on Neo4J REST database?
Hi, After adding nodes and relationships into Neo4J REST server using REST API. How do I read data from the database using SPARQL? Does the database support SPARQL? Regards, ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Forward slashes in index values
Good call Josh, Valid and much appreciated! /peter Sent from my phone. On Sep 28, 2011 10:33 PM, jadell josh.ad...@gmail.com wrote: Thanks for the heads up, Jim. On a tangentially related note, I filed this request: https://github.com/neo4j/community/issues/35 Basically, in the future, it would be useful to have a way to determine the server version via REST so the various clients can account for differences in the protocol like this. Thanks! -- Josh Adell -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Forward-slashes-in-index-values-tp3347515p3377304.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] REST, Transactions and Uniqueness
Linan,
It's high prio in the backlog for 1.6, so this WILL be taken care of. I
believe there is also an issue on this on Github? If not, please raise one
to track progress for the community. Thanks!
/peter
Sent from my phone.
On Sep 28, 2011 10:02 PM, Linan Wang tali.w...@gmail.com wrote:
Peter,
I feel uniqueness has been a recurring theme in neo4j applications,
especially when it's used heavily on algorithms traversing existing
data. it would be great if it's supported in kernel level:
interface NodeUniquenessConstraint
{
public Node getNode();
public void setupNode(Node newNode);
}
public Node getOrCreateNode(NodeUniquenessConstraint constraint)
{
// Preparation, acquires lock, etc.
Node n = constraint.getNode();
if(n == null)
{
n = createNode();
constraint.setupNode(n);
}
...
return n;
}
or, there is something similar already implemented?
On Tue, Sep 27, 2011 at 9:38 PM, Peter Neubauer
peter.neuba...@neotechnology.com wrote:
Guys,
Maps are now supported as parameters, look at the Gremlin plugin för
reference in the docs. Will add that for parameters to the cypher plugin
too.
Thanks for chipping in!
/peter
Sent from my phone.
On Sep 27, 2011 8:12 PM, Tony Wooster twoos...@gmail.com wrote:
Hi Linan,
That's essentially what I implemented, but the logic just became that
much more tortured when going over REST. Like I said, less of a Java
programmer. The implementation I came up with on the REST side (hacky
though it may be) was this:
@Description( An extension to help maintain unique relationships )
public class IndexTester extends ServerPlugin
{
@Name( error_if_in_node_index )
@Description( Will return a 4xx error if a key/value pair is found
in
+
a given index. Also errors if the index doesn't
exist.)
@PluginTarget( GraphDatabaseService.class )
public Boolean errorIfInNodeIndex(
@Source GraphDatabaseService graphDb,
@Description( Name of the index to earch. )
@Parameter( name = indexName ) String indexName,
@Description( Name of key to search. )
@Parameter( name = key ) String key,
@Description( Value to search for. )
@Parameter( name = value ) String value )
throws BadInputException
{
if ( !graphDb.index().existsForNodes( indexName ) )
throw new BadInputException(Index doesn't exist, new
NotFoundException());
IndexNode index = graphDb.index().forNodes( indexName );
if (index.get(key, value).size() 0)
throw new BadInputException(Key/value pair found in
index);
return null;
}
}
I'm still not entirely certain that this is the appropriate way to go;
probably a better solution would be a more general add node with
unique, indexed fields command that's slightly more functional than
this batch-operation-quirks based hack. As an aside -- does anyone
know when/if lists of maps for parameters will be implemented for REST
plugins?
Thanks for the response!
-T
On Thu, Sep 22, 2011 at 4:57 PM, Linan Wang tali.w...@gmail.com wrote:
Hi,
i had the issue few days ago and thanks to McKinley I got a workable
solution. i think the best way to do is through unmanaged extension.
the overhead of multiple REST calls could make the matter more
complex.
here is part of my ObjectFactory class. in my situation it's an
external id needs to be uniq. feel free to correct my codes :) the
performance is not ideal though. on my imac I got around 50 insertions
per sec. the bottle neck is not memory.
public T get(long externalId)
{
// try asynchronized read first;
IndexNode idx = getDefaultNodeIndex();
IndexHitsNode h = idx.get(IDX_KEY_EXTERNAL_ID,
externalId);
Node n = h.getSingle();
h.close();
if(n != null)
return wrap(n);
// if not found, try synchronized version;
return null;
}
public T getOrCreate(long externalId)
{
T ret = get( externalId );
if(ret != null)
return ret;
// if not found, try synchronized version;
return synchronizedGetOrCreate(externalId);
}
private synchronized T synchronizedGetOrCreate(long externalId)
{
// Just in case!
T ret = get( externalId );
if(ret != null)
return ret;
IndexNode idx = getDefaultNodeIndex();
Node n = null;
Transaction tx = db.beginTx();
try{
n = db.createNode();
// set property
n.setProperty(AbstractObject.EXTERNAL_ID_KEY,
externalId);
Re: [Neo4j] See the graph in the Neo4J embedded db
Or webadmin... 1) download the neo4j package 2) put your db in neo4j-dir/data/graph.db/ and start it 3) go to http://localhost:7474, click tab Data Browser and then the right most button for visualization mode there's you can see your graph. 2011/9/28 noppanit noppani...@gmail.com You could use neoclipse to see it. Sent from my BlackBerry® wireless device -Original Message- From: tt6 [via Neo4j Community Discussions] ml-node+s438527n3377257...@n3.nabble.com Date: Wed, 28 Sep 2011 13:23:29 To: noppanitnoppani...@gmail.com Subject: [Neo4j] See the graph in the Neo4J embedded db Hello, I have stored triples into the Neo4J embedded db, now I want to see the graph or data in the db. How can I do it? Thanks, ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ If you reply to this email, your message will be added to the discussion below: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-See-the-graph-in-the-Neo4J-embedded-db-tp3377257p3377257.html To start a new topic under Neo4j Community Discussions, email ml-node+s438527n438527...@n3.nabble.com To unsubscribe from Neo4j Community Discussions, visit http://neo4j-community-discussions.438527.n3.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_codenode=438527code=bm9wcGFuaXQuY0BnbWFpbC5jb218NDM4NTI3fDExOTIzNzAyNjk= -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-See-the-graph-in-the-Neo4J-embedded-db-tp3377257p3377301.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 -- 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
Re: [Neo4j] REST, Transactions and Uniqueness
Peter,
Thanks for replying. That's great to hear (the last I heard was just
that it wasn't going to make it into 1.5), elsewhere on the forums. I
know there's an issue tracking uniqueness in indices somewhere -- I
think on GitHub already.
In the meantime, you mentioned that maps are available as parameters
to extensions. Could you provide an example of how to use this? No
matter what I try, I'm getting errors like:
WARNING: Failed to load plugin [ServerPlugin[IndexAdder]]: Unsupported
parameter type: java.util.Mapjava.lang.String, java.lang.Object[]
... or ...
WARNING: Failed to load plugin [ServerPlugin[IndexAdder]]: Unsupported
parameter type: java.util.Mapjava.lang.String, java.lang.Object
... or ...
WARNING: Failed to load plugin [ServerPlugin[IndexAdder]]: Unsupported
parameter type: interface java.util.Map
Like I said previously, I'm not too hot on Java, but having spent a
lot of time reading the source code and a bit on java reflection, I
can't quite figure out how to specify Map types in the parameter list
to my extension. My attempts of:
public Node addUniqueNode(
@Source GraphDatabaseService graphDb,
@Description( Map of indexName : bodyKeys to search. )
@Parameter( name = indices )
MapString,String[] indices )
or, similarly:
@Parameter( name = indices ) MapString,Object indices )
or,
@Parameter( name = indices ) Map indices )
All failed. I just can't see how to wheedle at Map through
parameterExtractor in PluginPointFactoryImpl.java. Any ideas here?
Thanks much,
-Tony
On Wed, Sep 28, 2011 at 2:10 PM, Peter Neubauer
peter.neuba...@neotechnology.com wrote:
Linan,
It's high prio in the backlog for 1.6, so this WILL be taken care of. I
believe there is also an issue on this on Github? If not, please raise one
to track progress for the community. Thanks!
/peter
Sent from my phone.
On Sep 28, 2011 10:02 PM, Linan Wang tali.w...@gmail.com wrote:
Peter,
I feel uniqueness has been a recurring theme in neo4j applications,
especially when it's used heavily on algorithms traversing existing
data. it would be great if it's supported in kernel level:
interface NodeUniquenessConstraint
{
public Node getNode();
public void setupNode(Node newNode);
}
public Node getOrCreateNode(NodeUniquenessConstraint constraint)
{
// Preparation, acquires lock, etc.
Node n = constraint.getNode();
if(n == null)
{
n = createNode();
constraint.setupNode(n);
}
...
return n;
}
or, there is something similar already implemented?
On Tue, Sep 27, 2011 at 9:38 PM, Peter Neubauer
peter.neuba...@neotechnology.com wrote:
Guys,
Maps are now supported as parameters, look at the Gremlin plugin för
reference in the docs. Will add that for parameters to the cypher plugin
too.
Thanks for chipping in!
/peter
Sent from my phone.
On Sep 27, 2011 8:12 PM, Tony Wooster twoos...@gmail.com wrote:
Hi Linan,
That's essentially what I implemented, but the logic just became that
much more tortured when going over REST. Like I said, less of a Java
programmer. The implementation I came up with on the REST side (hacky
though it may be) was this:
@Description( An extension to help maintain unique relationships )
public class IndexTester extends ServerPlugin
{
@Name( error_if_in_node_index )
@Description( Will return a 4xx error if a key/value pair is found
in
+
a given index. Also errors if the index doesn't
exist.)
@PluginTarget( GraphDatabaseService.class )
public Boolean errorIfInNodeIndex(
@Source GraphDatabaseService graphDb,
@Description( Name of the index to earch. )
@Parameter( name = indexName ) String indexName,
@Description( Name of key to search. )
@Parameter( name = key ) String key,
@Description( Value to search for. )
@Parameter( name = value ) String value )
throws BadInputException
{
if ( !graphDb.index().existsForNodes( indexName ) )
throw new BadInputException(Index doesn't exist, new
NotFoundException());
IndexNode index = graphDb.index().forNodes( indexName );
if (index.get(key, value).size() 0)
throw new BadInputException(Key/value pair found in
index);
return null;
}
}
I'm still not entirely certain that this is the appropriate way to go;
probably a better solution would be a more general add node with
unique, indexed fields command that's slightly more functional than
this batch-operation-quirks based hack. As an aside -- does anyone
know when/if lists of maps for parameters will be implemented for REST
plugins?
Thanks for the response!
-T
On Thu, Sep 22, 2011 at 4:57 PM, Linan Wang tali.w...@gmail.com wrote:
Hi,
i had the issue few days ago and thanks to McKinley I got a workable
Re: [Neo4j] InvalidRecordException: Record[1983624] not in useRecord[1983624] not in use
So maybe you've hit yet another BatchInserter bug... will have to run a
similar test and try to reproduce it. Can it be reproduced consistently and
with varying data sets/sizes? Can you reproduce it if not using
BatchInserter?
2011/9/28 René Pickhardt r.pickha...@googlemail.com
I used the current stable release and the problem did not arise anymore but
I got new problems.
for many nodes even though (according to the data set they should have
relations) the
function (n.hasRelationship(DynamicRelationshipType.withName( UPDATE ),
Direction.BOTH)) does not stop. It just seems to jump into an endless loop
;(
I don't think I made a mistake in the code for the batch inserter but i
just
attached it. My insertion contains of two steps:
first I create many node in the graph and store them also in an index:
batchArticle. I do not query agains the index to check if a node with this
key already existed. But my keys are unique.
private void AddBatchNode(String key, String title){
MapString,Object properties = new HashMapString,Object();
properties.put( key, key );
properties.put( title, title );
properties.put( timestamp, 1 );
long node = inserter.createNode( properties );
properties = MapUtil.map( key, key );
batchArticle.add( node, properties );
}
then I attach many updates (also nodes encoded via timestamp) to every node
and connect them via a relationship.
private void BatchUpdate(String timestamp, String key) {
if (batchArticle.get(key, key).getSingle()!=null){
long node = batchArticle.get(key, key).getSingle();
MapString,Object properties = new HashMapString,Object();
properties.put( timestamp, timestamp );
long ci = inserter.createNode( properties );
inserter.createRelationship( node, ci, DynamicRelationshipType.withName(
UPDATE ),null);
}
}
the last step (i did not implement this) is to connect the nodes from the
first steps via friendship relations. But I wanted to do some testing
first...
anyone knows of this problem?
2011/9/28 Rick Bullotta rick.bullo...@thingworx.com
Hi, René.
I recognized your error almost immediately, since we encountered it in an
early 1.4 beta. ;-)
I think you'll have a good result if you can switch to the 1.4.1 release!
Best,
Rick
-Original Message-
From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org]
On Behalf Of René Pickhardt
Sent: Wednesday, September 28, 2011 10:29 AM
To: Neo4j user discussions
Subject: Re: [Neo4j] InvalidRecordException: Record[1983624] not in
useRecord[1983624] not in use
Hey guys,
I don't know how I found the old milestone. I was downloading it once I
started using neo4j.
I will just migrate to the current stable version and tell you afterwards
if
I still have problems. by your comments I guess the problem will be
solved.
Thanks so far!
best regards René
2011/9/28 Mattias Persson matt...@neotechnology.com
I'm curious to know how you found that old milestone also :) you picked
the
one out of extremely few having some kind of data problems.
Den onsdagen den 28:e september 2011 skrev Chris Gioran
chris.gio...@neotechnology.com:
Hi Rene,
According to git log, 1,4.M04 was tagged 10/06/2011, while the fix
for
a bug in the BatchInserterImpl that caused corrupted stores which
gave
the message you are seeing is
https://github.com/neo4j/community/commit/71fbe4ac1174fad16a7bb154c9f78d3f1b377248
which has a date of 04/07/2011.
This makes 1.4.M06 the earliest release to use that does not have
this
issue or, even better, go for 1.4.1 which is the latest stable
release. Since you are comfortable using milestones, 1.5.M01 might be
of interest to you.
http://neo4j.org/download has the links that you need.
hope that helped,
CG
2011/9/28 René Pickhardt r.pickha...@googlemail.com:
Neo1.4.M04 community edition no self build.
2011/9/28 Mattias Persson matt...@neotechnology.com
Which version of neo4j did you use to import your data, was it a
downloadable package, from maven or building yourself from a
branch?
2011/9/28 René Pickhardt r.pickha...@googlemail.com
hey everyone
I got a strange error message that a record is not in use if I
call
hasRelationship() function even though I checked against null
before!
My
real purpose was to start the traverser but it exited with the
same
error
message. That is why I put the n.hasRelationship which also would
not
work.
I imported a graph with 50 mio. nodes and about the same size of
relationships. (though I am about to import more relationships
later
on)
I
put 2 mio. nodes in a lucence index called article.
the counting variable t has the value 2385 (so the first 2385
calls
work
fine) if I skip this node the same problem accoures again at t =
3239.
[Neo4j] Neo4J support Android platform??
Hello, I'm playing around with Neo4J (both embedded and REST server). I have a question that can we use Neo4J on mobile platforms, e.g. Android? Regards, ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] Open Data Sets?
I want to create some demos of relational database extraction into Neo4j but I cannot share the data I use with the public. I know there are several resources for open data sets on the net, but has anyone on the list already found a nice, large data set that you are happy with? Thanks, McKinley ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] See the graph in the Neo4J embedded db
Hi noppanit, Thank you for your quick reply! I have checked http://wiki.neo4j.org/content/Neoclipse#Configuration about Neoclipse. Where can I find Neoclipse? The donwload page just show neo4j packages. I am using neo4j-community-1.5.M01 as REST server. In eclipse I use neo4j API to store data into embedded database. I really appreciate your help if you can give me clear information. Thank you! Regards, From: noppanit noppani...@gmail.com To: user@lists.neo4j.org Sent: Wednesday, September 28, 2011 1:33 PM Subject: Re: [Neo4j] See the graph in the Neo4J embedded db You could use neoclipse to see it. Sent from my BlackBerry® wireless device -Original Message- From: tt6 [via Neo4j Community Discussions] ml-node+s438527n3377257...@n3.nabble.com Date: Wed, 28 Sep 2011 13:23:29 To: noppanitnoppani...@gmail.com Subject: [Neo4j] See the graph in the Neo4J embedded db Hello, I have stored triples into the Neo4J embedded db, now I want to see the graph or data in the db. How can I do it? Thanks, ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ If you reply to this email, your message will be added to the discussion below: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-See-the-graph-in-the-Neo4J-embedded-db-tp3377257p3377257.html To start a new topic under Neo4j Community Discussions, email ml-node+s438527n438527...@n3.nabble.com To unsubscribe from Neo4j Community Discussions, visit http://neo4j-community-discussions.438527.n3.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_codenode=438527code=bm9wcGFuaXQuY0BnbWFpbC5jb218NDM4NTI3fDExOTIzNzAyNjk= -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-See-the-graph-in-the-Neo4J-embedded-db-tp3377257p3377301.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] Neo4J support Android platform??
I think if you can use REST then it won't be a problem. And I think most mobile platforms support REST and HTTP. -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Neo4J-support-Android-platform-tp3377564p3377651.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 support Android platform??
Hi noppanit, I meant that if I have an Android application then can my Android application stores data in a Neo4J database in the device? Thanks -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Neo4J-support-Android-platform-tp3377564p3377666.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] REST, Transactions and Uniqueness
peter,
a quick implementation is submitted. pull request sent. my naming
ability is probably not the best part. see if the codes make sense.
thanks.
On Wed, Sep 28, 2011 at 10:10 PM, Peter Neubauer
peter.neuba...@neotechnology.com wrote:
Linan,
It's high prio in the backlog for 1.6, so this WILL be taken care of. I
believe there is also an issue on this on Github? If not, please raise one
to track progress for the community. Thanks!
/peter
Sent from my phone.
On Sep 28, 2011 10:02 PM, Linan Wang tali.w...@gmail.com wrote:
Peter,
I feel uniqueness has been a recurring theme in neo4j applications,
especially when it's used heavily on algorithms traversing existing
data. it would be great if it's supported in kernel level:
interface NodeUniquenessConstraint
{
public Node getNode();
public void setupNode(Node newNode);
}
public Node getOrCreateNode(NodeUniquenessConstraint constraint)
{
// Preparation, acquires lock, etc.
Node n = constraint.getNode();
if(n == null)
{
n = createNode();
constraint.setupNode(n);
}
...
return n;
}
or, there is something similar already implemented?
On Tue, Sep 27, 2011 at 9:38 PM, Peter Neubauer
peter.neuba...@neotechnology.com wrote:
Guys,
Maps are now supported as parameters, look at the Gremlin plugin för
reference in the docs. Will add that for parameters to the cypher plugin
too.
Thanks for chipping in!
/peter
Sent from my phone.
On Sep 27, 2011 8:12 PM, Tony Wooster twoos...@gmail.com wrote:
Hi Linan,
That's essentially what I implemented, but the logic just became that
much more tortured when going over REST. Like I said, less of a Java
programmer. The implementation I came up with on the REST side (hacky
though it may be) was this:
@Description( An extension to help maintain unique relationships )
public class IndexTester extends ServerPlugin
{
@Name( error_if_in_node_index )
@Description( Will return a 4xx error if a key/value pair is found
in
+
a given index. Also errors if the index doesn't
exist.)
@PluginTarget( GraphDatabaseService.class )
public Boolean errorIfInNodeIndex(
@Source GraphDatabaseService graphDb,
@Description( Name of the index to earch. )
@Parameter( name = indexName ) String indexName,
@Description( Name of key to search. )
@Parameter( name = key ) String key,
@Description( Value to search for. )
@Parameter( name = value ) String value )
throws BadInputException
{
if ( !graphDb.index().existsForNodes( indexName ) )
throw new BadInputException(Index doesn't exist, new
NotFoundException());
IndexNode index = graphDb.index().forNodes( indexName );
if (index.get(key, value).size() 0)
throw new BadInputException(Key/value pair found in
index);
return null;
}
}
I'm still not entirely certain that this is the appropriate way to go;
probably a better solution would be a more general add node with
unique, indexed fields command that's slightly more functional than
this batch-operation-quirks based hack. As an aside -- does anyone
know when/if lists of maps for parameters will be implemented for REST
plugins?
Thanks for the response!
-T
On Thu, Sep 22, 2011 at 4:57 PM, Linan Wang tali.w...@gmail.com wrote:
Hi,
i had the issue few days ago and thanks to McKinley I got a workable
solution. i think the best way to do is through unmanaged extension.
the overhead of multiple REST calls could make the matter more
complex.
here is part of my ObjectFactory class. in my situation it's an
external id needs to be uniq. feel free to correct my codes :) the
performance is not ideal though. on my imac I got around 50 insertions
per sec. the bottle neck is not memory.
public T get(long externalId)
{
// try asynchronized read first;
IndexNode idx = getDefaultNodeIndex();
IndexHitsNode h = idx.get(IDX_KEY_EXTERNAL_ID,
externalId);
Node n = h.getSingle();
h.close();
if(n != null)
return wrap(n);
// if not found, try synchronized version;
return null;
}
public T getOrCreate(long externalId)
{
T ret = get( externalId );
if(ret != null)
return ret;
// if not found, try synchronized version;
return synchronizedGetOrCreate(externalId);
}
private synchronized T synchronizedGetOrCreate(long externalId)
{
// Just in case!
T ret = get( externalId );
if(ret != null)
return ret;
IndexNode idx = getDefaultNodeIndex();
Node n = null;
Re: [Neo4j] REST, Transactions and Uniqueness
Scratch that question...
Got it working. I didn't realize that Map parameters wasn't available
in stable 1.4.1. On the other hand, I also found what I believe to be
a bug?
I have an extension with the following signature:
@PluginTarget( GraphDatabaseService.class )
public Node addUniqueNode(
@Source GraphDatabaseService graphDb,
@Description( Map of indexName : bodyKeys to search. )
@Parameter( name = indices ) Map indices,
@Description( Node body )
@Parameter( name = body ) Map body )
throws BadInputException
I can POST against it, and it runs fine. However, trying to fetch
extension information yields:
http get /db/data/ext/IndexAdder/graphdb/add_unique_node
== 500 Internal Server Error
== html
== head
== meta http-equiv=Content-Type content=text/html; charset=ISO-8859-1/
== titleError 500 INTERNAL_SERVER_ERROR/title
== /head
== bodyh2HTTP ERROR 500/h2
== pProblem accessing
/db/data/ext/IndexAdder/graphdb/add_unique_node. Reason:
== preINTERNAL_SERVER_ERROR/pre/ph3Caused
by:/h3prejava.lang.NullPointerException
== at
org.neo4j.server.rest.repr.ExtensionPointRepresentation$ParameterRepresentation.serialize(ExtensionPointRepresentation.java:110)
== at org.neo4j.server.rest.repr.Serializer.serialize(Serializer.java:40)
== at
org.neo4j.server.rest.repr.ListSerializer.addMapping(ListSerializer.java:56)
== at
org.neo4j.server.rest.repr.MappingRepresentation.addTo(MappingRepresentation.java:52)
== at
org.neo4j.server.rest.repr.ListRepresentation.serialize(ListRepresentation.java:60)
== at org.neo4j.server.rest.repr.Serializer.serialize(Serializer.java:73)
== at
org.neo4j.server.rest.repr.MappingSerializer.putList(MappingSerializer.java:61)
== at
org.neo4j.server.rest.repr.ListRepresentation.putTo(ListRepresentation.java:73)
== at
org.neo4j.server.rest.repr.ObjectRepresentation$PropertyGetter.putTo(ObjectRepresentation.java:132)
== at
org.neo4j.server.rest.repr.ObjectRepresentation.serialize(ObjectRepresentation.java:143)
== at
org.neo4j.server.rest.repr.MappingRepresentation.serialize(MappingRepresentation.java:42)
== at org.neo4j.server.rest.repr.OutputFormat.format(OutputFormat.java:123)
== at
org.neo4j.server.rest.repr.OutputFormat.response(OutputFormat.java:100)
== at org.neo4j.server.rest.repr.OutputFormat.ok(OutputFormat.java:48)
== at
org.neo4j.server.rest.web.ExtensionService.getGraphDatabaseExtensionDescription(ExtensionService.java:148)
... snip ...
-Tony
On Wed, Sep 28, 2011 at 2:45 PM, Tony Wooster twoos...@gmail.com wrote:
Peter,
Thanks for replying. That's great to hear (the last I heard was just
that it wasn't going to make it into 1.5), elsewhere on the forums. I
know there's an issue tracking uniqueness in indices somewhere -- I
think on GitHub already.
In the meantime, you mentioned that maps are available as parameters
to extensions. Could you provide an example of how to use this? No
matter what I try, I'm getting errors like:
WARNING: Failed to load plugin [ServerPlugin[IndexAdder]]: Unsupported
parameter type: java.util.Mapjava.lang.String, java.lang.Object[]
... or ...
WARNING: Failed to load plugin [ServerPlugin[IndexAdder]]: Unsupported
parameter type: java.util.Mapjava.lang.String, java.lang.Object
... or ...
WARNING: Failed to load plugin [ServerPlugin[IndexAdder]]: Unsupported
parameter type: interface java.util.Map
Like I said previously, I'm not too hot on Java, but having spent a
lot of time reading the source code and a bit on java reflection, I
can't quite figure out how to specify Map types in the parameter list
to my extension. My attempts of:
public Node addUniqueNode(
@Source GraphDatabaseService graphDb,
@Description( Map of indexName : bodyKeys to search. )
@Parameter( name = indices )
MapString,String[] indices )
or, similarly:
@Parameter( name = indices ) MapString,Object indices )
or,
@Parameter( name = indices ) Map indices )
All failed. I just can't see how to wheedle at Map through
parameterExtractor in PluginPointFactoryImpl.java. Any ideas here?
Thanks much,
-Tony
On Wed, Sep 28, 2011 at 2:10 PM, Peter Neubauer
peter.neuba...@neotechnology.com wrote:
Linan,
It's high prio in the backlog for 1.6, so this WILL be taken care of. I
believe there is also an issue on this on Github? If not, please raise one
to track progress for the community. Thanks!
/peter
Sent from my phone.
On Sep 28, 2011 10:02 PM, Linan Wang tali.w...@gmail.com wrote:
Peter,
I feel uniqueness has been a recurring theme in neo4j applications,
especially when it's used heavily on algorithms traversing existing
data. it would be great if it's supported in kernel level:
interface NodeUniquenessConstraint
{
public Node getNode();
public void setupNode(Node
Re: [Neo4j] See the graph in the Neo4J embedded db
Andrew, check out the download page: http://neo4j.org/download/, you can find Neoclipse at the bottom of the page. Regards 2011/9/28 andrew ton andrewt...@yahoo.com Hi noppanit, Thank you for your quick reply! I have checked http://wiki.neo4j.org/content/Neoclipse#Configuration about Neoclipse. Where can I find Neoclipse? The donwload page just show neo4j packages. I am using neo4j-community-1.5.M01 as REST server. In eclipse I use neo4j API to store data into embedded database. I really appreciate your help if you can give me clear information. Thank you! Regards, From: noppanit noppani...@gmail.com To: user@lists.neo4j.org Sent: Wednesday, September 28, 2011 1:33 PM Subject: Re: [Neo4j] See the graph in the Neo4J embedded db You could use neoclipse to see it. Sent from my BlackBerry® wireless device -Original Message- From: tt6 [via Neo4j Community Discussions] ml-node+s438527n3377257...@n3.nabble.com Date: Wed, 28 Sep 2011 13:23:29 To: noppanitnoppani...@gmail.com Subject: [Neo4j] See the graph in the Neo4J embedded db Hello, I have stored triples into the Neo4J embedded db, now I want to see the graph or data in the db. How can I do it? Thanks, ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ If you reply to this email, your message will be added to the discussion below: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-See-the-graph-in-the-Neo4J-embedded-db-tp3377257p3377257.html To start a new topic under Neo4j Community Discussions, email ml-node+s438527n438527...@n3.nabble.com To unsubscribe from Neo4j Community Discussions, visit http://neo4j-community-discussions.438527.n3.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_codenode=438527code=bm9wcGFuaXQuY0BnbWFpbC5jb218NDM4NTI3fDExOTIzNzAyNjk= -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-See-the-graph-in-the-Neo4J-embedded-db-tp3377257p3377301.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 -- Adriano Almeida Caelum | Ensino e Inovação www.caelum.com.br ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] See the graph in the Neo4j embedded db
Hi, I think you should use graph viewers like jung. On Wed, Sep 28, 2011 at 11:50 PM, tt6 andrewt...@yahoo.com wrote: Hello, I have stored triples into the Neo4J embedded db, now I want to see the graph or data in the db. How can I do it? Thanks, -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/See-the-graph-in-the-Neo4j-embedded-db-tp3377246p3377246.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] Open Data Sets?
Dbpedia is good in RDF. We should start making a list. /peter Sent from my phone. On Sep 29, 2011 12:09 AM, McKinley mckinley1...@gmail.com wrote: I want to create some demos of relational database extraction into Neo4j but I cannot share the data I use with the public. I know there are several resources for open data sets on the net, but has anyone on the list already found a nice, large data set that you are happy with? Thanks, McKinley ___ 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] Open Data Sets?
and put them as ready to use neo4j databasen on http://example-data.neo4j.org Cheers M mobile mail please excuse brevity and typos Am 29.09.2011 um 07:17 schrieb Peter Neubauer peter.neuba...@neotechnology.com: Dbpedia is good in RDF. We should start making a list. /peter Sent from my phone. On Sep 29, 2011 12:09 AM, McKinley mckinley1...@gmail.com wrote: I want to create some demos of relational database extraction into Neo4j but I cannot share the data I use with the public. I know there are several resources for open data sets on the net, but has anyone on the list already found a nice, large data set that you are happy with? Thanks, McKinley ___ 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
