Re: [Neo4j] CNFE in Neo4j Server
The simplest explanation is probably the correct one: it is not on the classpath. This class is to be found in the jersey-server-1.3.jar is that jar on the classpath? (or in jersey-client-1.3.jar, either will do) The simplest way one might be fooled into not including it in the classpath is due to there not being a compile-time dependency on it. the JAX-RS API does not require an implementation for compiling, but at runtime you must have a valid JAX-RS implementation available on the classpath. The default implementation is the one defined by com.sun.ws.rs.ext.RuntimeDelegateImpl, a class that jersey provides, being the reference implementation. -tobias On Thu, Apr 7, 2011 at 7:19 AM, Peter Neubauer peter.neuba...@neotechnology.com wrote: Hi there, trying to execute https://github.com/peterneubauer/neo4j-gremlin-plugin/blob/master/src/test/org/neo4j/server/plugin/gremlin/GremlinPluginTest.java as a JUnit test on Eclipse/Mac with default JDK, Saikat is getting the following: java.lang.ExceptionInInitializerError at org.neo4j.server.rest.repr.formats.JsonFormat.init(JsonFormat.java:43) at org.neo4j.server.plugin.gremlin.GremlinPluginTest.setUpBeforeClass(GremlinPluginTest.java:37) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27) at org.junit.runners.ParentRunner.run(ParentRunner.java:236) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: com.sun.ws.rs.ext.RuntimeDelegateImpl at javax.ws.rs.ext.RuntimeDelegate.findDelegate(RuntimeDelegate.java:122) at javax.ws.rs.ext.RuntimeDelegate.getInstance(RuntimeDelegate.java:91) at javax.ws.rs.core.MediaType.clinit(MediaType.java:44) ... 17 more Caused by: java.lang.ClassNotFoundException: com.sun.ws.rs.ext.RuntimeDelegateImpl at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at javax.ws.rs.ext.FactoryFinder.newInstance(FactoryFinder.java:62) at javax.ws.rs.ext.FactoryFinder.find(FactoryFinder.java:155) at javax.ws.rs.ext.RuntimeDelegate.findDelegate(RuntimeDelegate.java:105) ... 19 more Any clues on why there is a class missing? Cheers, /peter neubauer GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org - Your high performance graph database. http://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Tobias Ivarsson tobias.ivars...@neotechnology.com Hacker, Neo Technology www.neotechnology.com Cellphone: +46 706 534857 ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] CNFE in Neo4j Server
Thanks Tobias, I dont believe I have this on my runtime classpath, I'll include it now. From: tobias.ivars...@neotechnology.com Date: Thu, 7 Apr 2011 08:06:51 +0200 To: user@lists.neo4j.org Subject: Re: [Neo4j] CNFE in Neo4j Server The simplest explanation is probably the correct one: it is not on the classpath. This class is to be found in the jersey-server-1.3.jar is that jar on the classpath? (or in jersey-client-1.3.jar, either will do) The simplest way one might be fooled into not including it in the classpath is due to there not being a compile-time dependency on it. the JAX-RS API does not require an implementation for compiling, but at runtime you must have a valid JAX-RS implementation available on the classpath. The default implementation is the one defined by com.sun.ws.rs.ext.RuntimeDelegateImpl, a class that jersey provides, being the reference implementation. -tobias On Thu, Apr 7, 2011 at 7:19 AM, Peter Neubauer peter.neuba...@neotechnology.com wrote: Hi there, trying to execute https://github.com/peterneubauer/neo4j-gremlin-plugin/blob/master/src/test/org/neo4j/server/plugin/gremlin/GremlinPluginTest.java as a JUnit test on Eclipse/Mac with default JDK, Saikat is getting the following: java.lang.ExceptionInInitializerError at org.neo4j.server.rest.repr.formats.JsonFormat.init(JsonFormat.java:43) at org.neo4j.server.plugin.gremlin.GremlinPluginTest.setUpBeforeClass(GremlinPluginTest.java:37) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27) at org.junit.runners.ParentRunner.run(ParentRunner.java:236) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: com.sun.ws.rs.ext.RuntimeDelegateImpl at javax.ws.rs.ext.RuntimeDelegate.findDelegate(RuntimeDelegate.java:122) at javax.ws.rs.ext.RuntimeDelegate.getInstance(RuntimeDelegate.java:91) at javax.ws.rs.core.MediaType.clinit(MediaType.java:44) ... 17 more Caused by: java.lang.ClassNotFoundException: com.sun.ws.rs.ext.RuntimeDelegateImpl at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at javax.ws.rs.ext.FactoryFinder.newInstance(FactoryFinder.java:62) at javax.ws.rs.ext.FactoryFinder.find(FactoryFinder.java:155) at javax.ws.rs.ext.RuntimeDelegate.findDelegate(RuntimeDelegate.java:105) ... 19 more Any clues on why there is a class missing? Cheers, /peter neubauer GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org - Your high performance graph database. http://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Tobias Ivarsson tobias.ivars...@neotechnology.com Hacker, Neo Technology www.neotechnology.com Cellphone: +46 706 534857 ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org
Re: [Neo4j] Constructing an evaluator that only takes specific nodes from a path
That would be EXCLUDE_AND_PRUNE.
On Thu, Apr 7, 2011 at 7:58 AM, Dario Rexin dario.re...@xing.com wrote:
Hi Peter, yes that would be not to include the path in the result set.
On 07.04.2011, at 07:01, Peter Neubauer
peter.neuba...@neotechnology.com wrote:
Dario,
I am not quite sure I understand what you mean by drop is that not
to include the path into the result or prune or something else? Do you
have a concrete example of this, maybe a simple toy graph test with
toy information?
Cheers,
/peter neubauer
GTalk: neubauer.peter
Skype peter.neubauer
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database.
http://startupbootcamp.org/- Öresund - Innovation happens HERE.
http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.
On Wed, Apr 6, 2011 at 6:35 PM, Dario Rexin dario.re...@xing.com
wrote:
Hello,
we are trying to construct an Evaluator that will select only one node
from the middle of a path and include it in the result. We do have a
specific path we are looking for and the endNode is stored in 'end'. Now
what we would like to do is have an Evaluator like this:
import org.neo4j.graphdb.traversal.
Evaluator;
new Evaluator(){
@Override
public Evaluation evaluate(org.neo4j.graphdb.Path path) {
if(path.length() 3) {
return Evaluation.EXCLUDE_AND_PRUNE;
} else if (path.length() == 2) {
return Evaluation.INCLUDE_AND_CONTINUE;
} else if (path.length() 2){
return Evaluation.EXCLUDE_AND_CONTINUE;
} else {
return path.endNode().getId() == end.getId() ?
Evaluation.EXCLUDE_AND_PRUNE : Evaluation.DROP_PATH_AND_PRUNE;
}
}
}
The decision on whether to accept or drop a path is based on wether we
have reached the endNode. That's why we would like to use something like
DROP_PATH_AND_PRUNE, which doesn't exist. What are we missing?
Any help appreciated!
Thanks,
Stephan and Dario
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Re: [Neo4j] Constructing an evaluator that only takes specific nodes from a path
INCLUDE_AND_CONTINUE
the path will be included in the result set and the traversal will
go further down that path
INCLUDE_AND_PRUNE
the path will be included in the result set, but the traversal
will continue from that path
EXCLUDE_AND_CONTINUE
the path won't be included in the result set, but the traversal
will continue from that path
EXCLUDE_AND_PRUNE
the path won't be included in the result set and the traversal
won't go further down that path, but will continue down other paths
that haven't been pruned
2011/4/7 Tobias Ivarsson tobias.ivars...@neotechnology.com:
That would be EXCLUDE_AND_PRUNE.
On Thu, Apr 7, 2011 at 7:58 AM, Dario Rexin dario.re...@xing.com wrote:
Hi Peter, yes that would be not to include the path in the result set.
On 07.04.2011, at 07:01, Peter Neubauer
peter.neuba...@neotechnology.com wrote:
Dario,
I am not quite sure I understand what you mean by drop is that not
to include the path into the result or prune or something else? Do you
have a concrete example of this, maybe a simple toy graph test with
toy information?
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, Apr 6, 2011 at 6:35 PM, Dario Rexin dario.re...@xing.com
wrote:
Hello,
we are trying to construct an Evaluator that will select only one node
from the middle of a path and include it in the result. We do have a
specific path we are looking for and the endNode is stored in 'end'. Now
what we would like to do is have an Evaluator like this:
import org.neo4j.graphdb.traversal.
Evaluator;
new Evaluator(){
@Override
public Evaluation evaluate(org.neo4j.graphdb.Path path) {
if(path.length() 3) {
return Evaluation.EXCLUDE_AND_PRUNE;
} else if (path.length() == 2) {
return Evaluation.INCLUDE_AND_CONTINUE;
} else if (path.length() 2){
return Evaluation.EXCLUDE_AND_CONTINUE;
} else {
return path.endNode().getId() == end.getId() ?
Evaluation.EXCLUDE_AND_PRUNE : Evaluation.DROP_PATH_AND_PRUNE;
}
}
}
The decision on whether to accept or drop a path is based on wether we
have reached the endNode. That's why we would like to use something like
DROP_PATH_AND_PRUNE, which doesn't exist. What are we missing?
Any help appreciated!
Thanks,
Stephan and Dario
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Re: [Neo4j] Constructing an evaluator that only takes specific nodes from a path
Sory, I meant INCLUDE_AND_PRUNE the path will be included in the result set, but the traversal won't go further down that path, but will continue down other paths that haven't been pruned -- 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] release party berlin
+1 /purbon 2011/4/7 Michael Hunger michael.hun...@neotechnology.com Thomas and I will do it on the evening of Sunday, April 17th, the day before I leave for Malmö this month. The party is to be held in the lots of different beer pub Aufsturz, http://www.aufsturz.de/, oranienburger str. 67. If I'm going to reserve some seats there, how many people should I account for? Rather 10, 100 or more ? So, who wants to come? Cheers Michael ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Pere Urbón-Bayes pere.ur...@gmail.com http://www.purbon.com http://twitter.com/purbon Barcelona - Catalonia Spain ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] How to trim first couple nodes from path in traversal framework?
You'd have to do the filtering/pruning in an evaluator, but the
sub-pathing afterwards, like:
for ( Path path : description.traverse(...) )
{
path = subPath( path, 2 );
}
private Path subPath( Path source, int from )
{
if ( source.length() from )
throw new IllegalArgumentException( source + isn't long
enough ( + from + ) );
IteratorNode nodes = source.nodes().iterator();
IteratorRelationship relationships =
source.relationships().iterator();
for ( int i = 0; i from; i++ )
{
nodes.next();
relationships.next();
}
PathImpl.Builder builder = new PathImpl.Builder( nodes.next() );
while ( relationships.hasNext() )
{
builder = builder.push( relationships.next() );
}
return builder.build();
}
Such a method should preferably be added to the Path interface,
Path#subPath or similar and it would be implemented much better also
:)
2011/4/7 Brendan Cheng ccp...@gmail.com:
Hi,
I would like to fetch a ending portion of a path where the timestamp
of the relationship match. for example:
(Node 1)---2pm(Node 3)---3PM---(Node 4)4PM---(Node 64)
from the above , I only want the subpath starting from Node 4 onward
for the timestamp greater than 3:30PM
How could I code evaluator to do it?
Thanks in advance,
Brendan
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Re: [Neo4j] Constructing an evaluator that only takes specific nodes from a path
Hi guys, Dario and I are working together on this, so let me clarify, what we want to achieve. An example query in a friend network would be: Retrieve a set of people P that are the direct friends of person A. P should include only those friends that are also on a path between A and another user B. We know how to find paths, but we fail at returning nodes - let alone sets of nodes. The old ReturnableEvaluator seemed to achieve just that: A client hook for evaluating whether a specific node should be returned from a traverser., but that is deprecated in the current milestone release. We're unable to find the equivalent functionality with the new Traversal framework. Thanks Stephan On Thu, Apr 7, 2011 at 09:35, Mattias Persson matt...@neotechnology.comwrote: Sory, I meant INCLUDE_AND_PRUNE the path will be included in the result set, but the traversal won't go further down that path, but will continue down other paths that haven't been pruned -- Mattias Persson, [matt...@neotechnology.com] Hacker, Neo Technology www.neotechnology.com ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Constructing an evaluator that only takes specific nodes from a path
2011/4/7 Stephan Hagemann stephan.hagem...@googlemail.com: Hi guys, Dario and I are working together on this, so let me clarify, what we want to achieve. An example query in a friend network would be: Retrieve a set of people P that are the direct friends of person A. P should include only those friends that are also on a path between A and another user B. We know how to find paths, but we fail at returning nodes - let alone sets of nodes. The old ReturnableEvaluator seemed to achieve just that: A client hook for evaluating whether a specific node should be returned from a traverser., but that is deprecated in the current milestone release. We're unable to find the equivalent functionality with the new Traversal framework. ReturnableEvaluator is like controlling the INCLUDE/EXCLUDE part of an evaluation StopEvaluator is like controlling the CONTINUE/PRUNE part of an evaluation The @Deprecated TraversalDescription#prune and #filter are also a direct mapping of StopEvaluator and ReturnableEvaluator respectively. Evaluator replaces those and combines them into one concept where you can express the same semantics. Thanks Stephan On Thu, Apr 7, 2011 at 09:35, Mattias Persson matt...@neotechnology.comwrote: Sory, I meant INCLUDE_AND_PRUNE the path will be included in the result set, but the traversal won't go further down that path, but will continue down other paths that haven't been pruned -- Mattias Persson, [matt...@neotechnology.com] Hacker, Neo Technology www.neotechnology.com ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Mattias Persson, [matt...@neotechnology.com] Hacker, Neo Technology www.neotechnology.com ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Constructing an evaluator that only takes specific nodes from a path
I think the confusing thing here is that ReturnableEvaluator talked about including/excluding nodes whereas when describing the Evaluations you spoke about including/excluding paths. Which of those is correct ? Cheers Michael Am 07.04.2011 um 10:40 schrieb Mattias Persson: 2011/4/7 Stephan Hagemann stephan.hagem...@googlemail.com: Hi guys, Dario and I are working together on this, so let me clarify, what we want to achieve. An example query in a friend network would be: Retrieve a set of people P that are the direct friends of person A. P should include only those friends that are also on a path between A and another user B. We know how to find paths, but we fail at returning nodes - let alone sets of nodes. The old ReturnableEvaluator seemed to achieve just that: A client hook for evaluating whether a specific node should be returned from a traverser., but that is deprecated in the current milestone release. We're unable to find the equivalent functionality with the new Traversal framework. ReturnableEvaluator is like controlling the INCLUDE/EXCLUDE part of an evaluation StopEvaluator is like controlling the CONTINUE/PRUNE part of an evaluation The @Deprecated TraversalDescription#prune and #filter are also a direct mapping of StopEvaluator and ReturnableEvaluator respectively. Evaluator replaces those and combines them into one concept where you can express the same semantics. Thanks Stephan On Thu, Apr 7, 2011 at 09:35, Mattias Persson matt...@neotechnology.comwrote: Sory, I meant INCLUDE_AND_PRUNE the path will be included in the result set, but the traversal won't go further down that path, but will continue down other paths that haven't been pruned -- Mattias Persson, [matt...@neotechnology.com] Hacker, Neo Technology www.neotechnology.com ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Mattias Persson, [matt...@neotechnology.com] Hacker, Neo Technology www.neotechnology.com ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Constructing an evaluator that only takes specific nodes from a path
If they are indeed equivalent, Michael is right - then I was confused by the doc talking about nodes vs the other talking about paths. On Thu, Apr 7, 2011 at 10:43, Michael Hunger michael.hun...@neotechnology.com wrote: I think the confusing thing here is that ReturnableEvaluator talked about including/excluding nodes whereas when describing the Evaluations you spoke about including/excluding paths. Which of those is correct ? Cheers Michael Am 07.04.2011 um 10:40 schrieb Mattias Persson: 2011/4/7 Stephan Hagemann stephan.hagem...@googlemail.com: Hi guys, Dario and I are working together on this, so let me clarify, what we want to achieve. An example query in a friend network would be: Retrieve a set of people P that are the direct friends of person A. P should include only those friends that are also on a path between A and another user B. We know how to find paths, but we fail at returning nodes - let alone sets of nodes. The old ReturnableEvaluator seemed to achieve just that: A client hook for evaluating whether a specific node should be returned from a traverser., but that is deprecated in the current milestone release. We're unable to find the equivalent functionality with the new Traversal framework. ReturnableEvaluator is like controlling the INCLUDE/EXCLUDE part of an evaluation StopEvaluator is like controlling the CONTINUE/PRUNE part of an evaluation The @Deprecated TraversalDescription#prune and #filter are also a direct mapping of StopEvaluator and ReturnableEvaluator respectively. Evaluator replaces those and combines them into one concept where you can express the same semantics. Thanks Stephan On Thu, Apr 7, 2011 at 09:35, Mattias Persson matt...@neotechnology.comwrote: Sory, I meant INCLUDE_AND_PRUNE the path will be included in the result set, but the traversal won't go further down that path, but will continue down other paths that haven't been pruned -- Mattias Persson, [matt...@neotechnology.com] Hacker, Neo Technology www.neotechnology.com ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Mattias Persson, [matt...@neotechnology.com] Hacker, Neo Technology www.neotechnology.com ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ 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] Constructing an evaluator that only takes specific nodes from a path
2011/4/7 Michael Hunger michael.hun...@neotechnology.com: I think the confusing thing here is that ReturnableEvaluator talked about including/excluding nodes whereas when describing the Evaluations you spoke about including/excluding paths. Oh, sorry... one major difference from the old traversal framework is that it returns nodes. The new framework returns paths leading from the start node up to that node. You still make include/exclude decisions based on the current position of the traversal, just that in the new framework you've got the full path in addition to the current node (the end node of the path). Which of those is correct ? Cheers Michael Am 07.04.2011 um 10:40 schrieb Mattias Persson: 2011/4/7 Stephan Hagemann stephan.hagem...@googlemail.com: Hi guys, Dario and I are working together on this, so let me clarify, what we want to achieve. An example query in a friend network would be: Retrieve a set of people P that are the direct friends of person A. P should include only those friends that are also on a path between A and another user B. We know how to find paths, but we fail at returning nodes - let alone sets of nodes. The old ReturnableEvaluator seemed to achieve just that: A client hook for evaluating whether a specific node should be returned from a traverser., but that is deprecated in the current milestone release. We're unable to find the equivalent functionality with the new Traversal framework. ReturnableEvaluator is like controlling the INCLUDE/EXCLUDE part of an evaluation StopEvaluator is like controlling the CONTINUE/PRUNE part of an evaluation The @Deprecated TraversalDescription#prune and #filter are also a direct mapping of StopEvaluator and ReturnableEvaluator respectively. Evaluator replaces those and combines them into one concept where you can express the same semantics. Thanks Stephan On Thu, Apr 7, 2011 at 09:35, Mattias Persson matt...@neotechnology.comwrote: Sory, I meant INCLUDE_AND_PRUNE the path will be included in the result set, but the traversal won't go further down that path, but will continue down other paths that haven't been pruned -- Mattias Persson, [matt...@neotechnology.com] Hacker, Neo Technology www.neotechnology.com ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Mattias Persson, [matt...@neotechnology.com] Hacker, Neo Technology www.neotechnology.com ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Mattias Persson, [matt...@neotechnology.com] Hacker, Neo Technology www.neotechnology.com ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] Lucene 3.1 with neo4j. Is it OK?
Hi, the subject says is all. :-) But anyway, is it possible/safe to use the brand new 3.1 (31 March 2011) release of Lucene with neo4j? Thanks, --- balazs ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Constructing an evaluator that only takes specific nodes from a path
2011/4/7 Stephan Hagemann stephan.hagem...@googlemail.com:
Thanks for clearing that up!
Then I can come back to my initial comment. If the Evaluator returns paths
and we are looking for nodes (sets of nodes to be specific), we have no easy
mechanism that will ensure we do not return duplicate nodes (because the
paths they are extracted from are not duplicates). Again, with the example:
Retrieve a set of people P that are the direct friends of person A. P should
include only those friends that are also on a path between A and another
user B.
I have attach an image that highlights this problem.
As you can see from the attached image, querying for the paths that satisfy
this proposition will lead to a duplication of node P in the result. If we
deduplicate after the traversal, we can't stop the traversal when we have
found the maximum number of nodes we wanted to return.
Oh, so if any node in the path has been returned in any other path
before if (except the start node) then exclude it? That's the first
time I've heard that requirement. Love the fact that you sent a
picture, guys :)
So what about:
int hitCount = 0;
for ( Path path : ...traverse(...) ) {
if ( unique( path ) ) {
if ( hitCount++ = 50 )
break;
// handle the path
}
}
...or wrap the IterablePath from traverse in:
new FilteringIterablePath(...traverse(...), new PredicatePath() {
public boolean accept( Path path ) {
return unique( path );
}
} );
and only iterate max 50 of those. Write the unique() method however
you'd like... maybe just with a SetNode with all the nodes except
the start/end nodes and add all those nodes from each path and if that
set had any of those nodes then don't consider it unique.
That is... unless we specify more complex include/exclude/continue/prune
rules in an Evaluator that takes into account the nodes that it has
internally stored as returnables. Is that the way to go?
On Thu, Apr 7, 2011 at 10:48, Mattias Persson
matt...@neotechnology.comwrote:
2011/4/7 Michael Hunger michael.hun...@neotechnology.com:
I think the confusing thing here is that ReturnableEvaluator talked about
including/excluding nodes
whereas when describing the Evaluations you spoke about
including/excluding paths.
Oh, sorry... one major difference from the old traversal framework is
that it returns nodes. The new framework returns paths leading from
the start node up to that node. You still make include/exclude
decisions based on the current position of the traversal, just that in
the new framework you've got the full path in addition to the current
node (the end node of the path).
Which of those is correct ?
Cheers
Michael
Am 07.04.2011 um 10:40 schrieb Mattias Persson:
2011/4/7 Stephan Hagemann stephan.hagem...@googlemail.com:
Hi guys,
Dario and I are working together on this, so let me clarify, what we
want to
achieve. An example query in a friend network would be:
Retrieve a set of people P that are the direct friends of person A. P
should
include only those friends that are also on a path between A and
another
user B.
We know how to find paths, but we fail at returning nodes - let alone
sets
of nodes.
The old ReturnableEvaluator seemed to achieve just that: A client hook
for
evaluating whether a specific node should be returned from a
traverser.,
but that is deprecated in the current milestone release. We're unable
to
find the equivalent functionality with the new Traversal framework.
ReturnableEvaluator is like controlling the INCLUDE/EXCLUDE part of an
evaluation
StopEvaluator is like controlling the CONTINUE/PRUNE part of an
evaluation
The @Deprecated TraversalDescription#prune and #filter are also a
direct mapping of StopEvaluator and ReturnableEvaluator respectively.
Evaluator replaces those and combines them into one concept where you
can express the same semantics.
Thanks
Stephan
On Thu, Apr 7, 2011 at 09:35, Mattias Persson
matt...@neotechnology.comwrote:
Sory, I meant
INCLUDE_AND_PRUNE
the path will be included in the result set, but the traversal
won't go further down that path, but will continue down other paths
that haven't been pruned
--
Mattias Persson, [matt...@neotechnology.com]
Hacker, Neo Technology
www.neotechnology.com
___
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https://lists.neo4j.org/mailman/listinfo/user
___
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https://lists.neo4j.org/mailman/listinfo/user
--
Mattias Persson, [matt...@neotechnology.com]
Hacker, Neo Technology
www.neotechnology.com
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Re: [Neo4j] Lucene 3.1 with neo4j. Is it OK?
I see no reason for it not to work, Lucene has a good story of compatibility between releases with the same major version. But please note that this isn't something Neo Technology would officially support (yet), so from that point of view you'd be on your own. -t On Thu, Apr 7, 2011 at 11:16 AM, Balazs E. Pataki pat...@dsd.sztaki.huwrote: Hi, the subject says is all. :-) But anyway, is it possible/safe to use the brand new 3.1 (31 March 2011) release of Lucene with neo4j? Thanks, --- balazs ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Tobias Ivarsson tobias.ivars...@neotechnology.com Hacker, Neo Technology www.neotechnology.com Cellphone: +46 706 534857 ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Lucene 3.1 with neo4j. Is it OK?
Ok, thanks. I will try and report if I find out something (good or bad). --- balazs On 4/7/11 11:44 AM, Tobias Ivarsson wrote: I see no reason for it not to work, Lucene has a good story of compatibility between releases with the same major version. But please note that this isn't something Neo Technology would officially support (yet), so from that point of view you'd be on your own. -t On Thu, Apr 7, 2011 at 11:16 AM, Balazs E. Patakipat...@dsd.sztaki.huwrote: Hi, the subject says is all. :-) But anyway, is it possible/safe to use the brand new 3.1 (31 March 2011) release of Lucene with neo4j? Thanks, --- balazs ___ 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] Constructing an evaluator that only takes specific nodes from a path
Thanks, that will help! Iwill try defining my own uniqueness criteria. Oh, so if any node in the path has been returned in any other path before if (except the start node) then exclude it? That's the first time I've heard that requirement. Love the fact that you sent a picture, guys :) Handcrafted - that's how we do it ;) Our requirement is a little bit different than you state it: if any node in the path _that will be returned_ has been returned in any other path before then exclude it. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] building from source
Thanks. I was trying to use the jar target rather than install. That build fails with: --- T E S T S --- Running org.neo4j.com.TestCommunication Thu Apr 07 10:53:14 EDT 2011: MadeUpServer communication server started and bound to 1234 [MadeUpServerProcess:27271] Thu Apr 07 10:53:15 EDT 2011: MadeUpServer communication server started and bound to [MadeUpServerProcess:27271] Thu Apr 07 10:53:24 EDT 2011: MadeUpServer shutdown, closing all channels Tests run: 5, Failures: 1, Errors: 3, Skipped: 0, Time elapsed: 10.353 sec FAILURE! Results : Failed tests: clientGetResponseFromServerViaComLayer(org.neo4j.com.TestCommunication) Tests in error: makeSureClientStoreIdsMustMatch(org.neo4j.com.TestCommunication) makeSureServerStoreIdsMustMatch(org.neo4j.com.TestCommunication) makeSureClientCanStreamBigData(org.neo4j.com.TestCommunication) Tests run: 5, Failures: 1, Errors: 3, Skipped: 0 I can get it to build though with: mvn -Dmaven.test.skip=true install –☮W On Thu, Apr 7, 2011 at 1:05 AM, Peter Neubauer peter.neuba...@neotechnology.com wrote: Willi, the main build tool is maven, and we are in the middle of a major reshuffling on GIT, so if you install maven.apache.org and try mvn clean install that, things should work out better. Would that be an option? Cheers, /peter neubauer ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] building from source
The failures you are seeing are for tests that deal with large data. They thus need a large heap configuration to succeed. For specifying such settings for maven you would use the MAVEN_OPTS environment variable, something like: export MAVEN_OPTS=-Xmx1G Cheers, Tobias On Thu, Apr 7, 2011 at 4:58 PM, Will Holcomb w...@dhappy.org wrote: Thanks. I was trying to use the jar target rather than install. That build fails with: --- T E S T S --- Running org.neo4j.com.TestCommunication Thu Apr 07 10:53:14 EDT 2011: MadeUpServer communication server started and bound to 1234 [MadeUpServerProcess:27271] Thu Apr 07 10:53:15 EDT 2011: MadeUpServer communication server started and bound to [MadeUpServerProcess:27271] Thu Apr 07 10:53:24 EDT 2011: MadeUpServer shutdown, closing all channels Tests run: 5, Failures: 1, Errors: 3, Skipped: 0, Time elapsed: 10.353 sec FAILURE! Results : Failed tests: clientGetResponseFromServerViaComLayer(org.neo4j.com.TestCommunication) Tests in error: makeSureClientStoreIdsMustMatch(org.neo4j.com.TestCommunication) makeSureServerStoreIdsMustMatch(org.neo4j.com.TestCommunication) makeSureClientCanStreamBigData(org.neo4j.com.TestCommunication) Tests run: 5, Failures: 1, Errors: 3, Skipped: 0 I can get it to build though with: mvn -Dmaven.test.skip=true install –☮W On Thu, Apr 7, 2011 at 1:05 AM, Peter Neubauer peter.neuba...@neotechnology.com wrote: Willi, the main build tool is maven, and we are in the middle of a major reshuffling on GIT, so if you install maven.apache.org and try mvn clean install that, things should work out better. Would that be an option? Cheers, /peter neubauer ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Tobias Ivarsson tobias.ivars...@neotechnology.com Hacker, Neo Technology www.neotechnology.com Cellphone: +46 706 534857 ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] Neo4j Neo Technology logos in vector format?
Hey, As subject, is there anywhere I can get Neo4j or Neo Technology logos in vector image format (ps, eps, pdf, svg)? I'll be using them in a few posters at work, for the SICS open day. They will be advertising past and ongoing Neo Technology related research. A lot of people from industry will participate, so it's a opportunity to advertise. Cheers, Alex ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j Neo Technology logos in vector format?
I did this a bit ago and it might help start you off: http://will.tip.dhappy.org/image/logo/Neo4j/ On Thu, Apr 7, 2011 at 11:59 AM, Alex Averbuch alex.averb...@gmail.comwrote: Hey, As subject, is there anywhere I can get Neo4j or Neo Technology logos in vector image format (ps, eps, pdf, svg)? I'll be using them in a few posters at work, for the SICS open day. They will be advertising past and ongoing Neo Technology related research. A lot of people from industry will participate, so it's a opportunity to advertise. Cheers, Alex ___ 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 Neo Technology logos in vector format?
Thanks Will! On Thu, Apr 7, 2011 at 6:08 PM, Will Holcomb w...@dhappy.org wrote: I did this a bit ago and it might help start you off: http://will.tip.dhappy.org/image/logo/Neo4j/ On Thu, Apr 7, 2011 at 11:59 AM, Alex Averbuch alex.averb...@gmail.com wrote: Hey, As subject, is there anywhere I can get Neo4j or Neo Technology logos in vector image format (ps, eps, pdf, svg)? I'll be using them in a few posters at work, for the SICS open day. They will be advertising past and ongoing Neo Technology related research. A lot of people from industry will participate, so it's a opportunity to advertise. Cheers, Alex ___ 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] Lucene 3.1 with neo4j. Is it OK?
Any plans to officially test Lucene 3.1 for Neo 1.3 GA? There are plenty of useful things and bug fixes in Lucene 3.1. -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Tobias Ivarsson Sent: Thursday, April 07, 2011 5:45 AM To: Neo4j user discussions Subject: Re: [Neo4j] Lucene 3.1 with neo4j. Is it OK? I see no reason for it not to work, Lucene has a good story of compatibility between releases with the same major version. But please note that this isn't something Neo Technology would officially support (yet), so from that point of view you'd be on your own. -t On Thu, Apr 7, 2011 at 11:16 AM, Balazs E. Pataki pat...@dsd.sztaki.huwrote: Hi, the subject says is all. :-) But anyway, is it possible/safe to use the brand new 3.1 (31 March 2011) release of Lucene with neo4j? Thanks, --- balazs ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Tobias Ivarsson tobias.ivars...@neotechnology.com Hacker, Neo Technology www.neotechnology.com Cellphone: +46 706 534857 ___ 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] Using Neo4J with Apache Solr
Does anyone have any experience using Solr with Neo4J? ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Using Neo4J with Apache Solr
I've had moderate success tying Solr into Neo4J using an custom UpdateRequestProcessor: http://wiki.apache.org/solr/UpdateRequestProcessor With this, I'm able to intercept incoming documents and update a graph to keep everything in sync. In my case, Solr is my primary system of record and I'm pushing updates to the graph asychronously (without touching the Solr document at all). Augmenting your query logic to support graph lookup is a different matter, though, and would likely involve doing some customization at the Lucene level. Another possibility is to define a custom function of value source which hooks into Neo4J somehow: http://lucene.apache.org/solr/api/org/apache/solr/search/function/package-summary.html But it all depends on your use case. On Thu, Apr 7, 2011 at 11:32 AM, Rick Bullotta rick.bullo...@thingworx.com wrote: Does anyone have any experience using Solr with Neo4J? ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Build Smarter Software. Spantree Technology Group, LLC email: ced...@spantree.net | phone: 773.359.3865 http://www.spantree.net ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Lucene 3.1 with neo4j. Is it OK?
1.3 is frozen, nothing new is going in until the 1.4 line. -tobias On Thu, Apr 7, 2011 at 6:32 PM, Rick Bullotta rick.bullo...@thingworx.comwrote: Any plans to officially test Lucene 3.1 for Neo 1.3 GA? There are plenty of useful things and bug fixes in Lucene 3.1. -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Tobias Ivarsson Sent: Thursday, April 07, 2011 5:45 AM To: Neo4j user discussions Subject: Re: [Neo4j] Lucene 3.1 with neo4j. Is it OK? I see no reason for it not to work, Lucene has a good story of compatibility between releases with the same major version. But please note that this isn't something Neo Technology would officially support (yet), so from that point of view you'd be on your own. -t On Thu, Apr 7, 2011 at 11:16 AM, Balazs E. Pataki pat...@dsd.sztaki.hu wrote: Hi, the subject says is all. :-) But anyway, is it possible/safe to use the brand new 3.1 (31 March 2011) release of Lucene with neo4j? Thanks, --- balazs ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Tobias Ivarsson tobias.ivars...@neotechnology.com Hacker, Neo Technology www.neotechnology.com Cellphone: +46 706 534857 ___ 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 -- Tobias Ivarsson tobias.ivars...@neotechnology.com Hacker, Neo Technology www.neotechnology.com Cellphone: +46 706 534857 ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j Neo Technology logos in vector format?
Nice! Also, I think Andreas Kollegger has been doing Vector Magic with the logo lately? /peter On Thu, Apr 7, 2011 at 6:15 PM, Alex Averbuch alex.averb...@gmail.com wrote: Thanks Will! On Thu, Apr 7, 2011 at 6:08 PM, Will Holcomb w...@dhappy.org wrote: I did this a bit ago and it might help start you off: http://will.tip.dhappy.org/image/logo/Neo4j/ On Thu, Apr 7, 2011 at 11:59 AM, Alex Averbuch alex.averb...@gmail.com wrote: Hey, As subject, is there anywhere I can get Neo4j or Neo Technology logos in vector image format (ps, eps, pdf, svg)? I'll be using them in a few posters at work, for the SICS open day. They will be advertising past and ongoing Neo Technology related research. A lot of people from industry will participate, so it's a opportunity to advertise. Cheers, Alex ___ 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
Re: [Neo4j] Using Neo4J with Apache Solr
All, also, Patrick O'Leary has contributed an initial Solr indexing approach that is still at https://svn.neo4j.org/laboratory/components/solr/ . You could check it out and update it and report back on what you think! 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 Thu, Apr 7, 2011 at 7:09 PM, Cedric Hurst ced...@spantree.net wrote: I've had moderate success tying Solr into Neo4J using an custom UpdateRequestProcessor: http://wiki.apache.org/solr/UpdateRequestProcessor With this, I'm able to intercept incoming documents and update a graph to keep everything in sync. In my case, Solr is my primary system of record and I'm pushing updates to the graph asychronously (without touching the Solr document at all). Augmenting your query logic to support graph lookup is a different matter, though, and would likely involve doing some customization at the Lucene level. Another possibility is to define a custom function of value source which hooks into Neo4J somehow: http://lucene.apache.org/solr/api/org/apache/solr/search/function/package-summary.html But it all depends on your use case. On Thu, Apr 7, 2011 at 11:32 AM, Rick Bullotta rick.bullo...@thingworx.com wrote: Does anyone have any experience using Solr with Neo4J? ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Build Smarter Software. Spantree Technology Group, LLC email: ced...@spantree.net | phone: 773.359.3865 http://www.spantree.net ___ 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
