Re: [Neo4j] how many relationships?

2011-07-22 Thread cyuczi eekc
thanks for that, I only had embedded-examples changed, but it looks like I
was doing the git pull wrong, that is I was using `git fetch from upstream`
instead of `git pull`... I actually never had to use this before :) I was
only ever committing with git  (used svn/mercurial before though) For some
reason I remembered (from a friend) that fetch was the way to pull.
So I did the git pull and it worked (the counting worked as expected too,
hooray!). Thus my bad, soz :)

I am glad I didn't have to wait 3 days, I even looked into Organizations on
github as an alternative way of getting limited (read-only) access to the
committers' repo.

Now I can continue ... xD

On Fri, Jul 22, 2011 at 7:51 AM, Michael Hunger 
michael.hun...@neotechnology.com wrote:

 github has no separate repo
 for the readonly url
 most probably your git pull failed due to local changes

 git stash
 them or use
 git pull --rebase

 Michael

 mobile mail please excuse brevity and typos

 Am 22.07.2011 um 04:32 schrieb cyuczi eekc cyuczie...@gmail.com:

  Hey, btw, the issue was fixed:
 https://trac.neo4j.org/ticket/356#comment:1
  However, github didn't yet sync the git-readonly (ie. git://
  github.com/neo4j/community.git ) and looks like I am 3-4 days back,
 since my
  HEAD is at:
 
  Minor fix to the cypher/identifiers section.
  
 https://github.com/neo4j/community/commit/dc260c269ae4e09362ada181d7b9a42e6c86560e
 
 
   nawroth https://github.com/nawroth (author)
  3 days ago
 
  as seen here: https://github.com/neo4j/community/commits/master/
  I guess that is why you didn't say anything yet (because me fetching from
  git would not be able to get the fix yet, 3 more days geezuz xD)
 
  Anyway, I'm only saying this just in case you were not aware this was
 fixed
  (apparently by someone else) and you were still working on it. Sorry, I
  already had made a ticket about this before you last replied.
 
  Thank you all, can't wait to test :)
 
  On Thu, Jul 21, 2011 at 12:13 PM, Michael Hunger 
  michael.hun...@neotechnology.com wrote:
 
  We're already on it. Looking through the causes for that issue and will
  keep you and everyone else informed.
 
  Michael
 
  Am 21.07.2011 um 06:52 schrieb cyuczi eekc:
 
  about this, should I create an issue?
 
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Re: [Neo4j] how many relationships?

2011-07-22 Thread Michael Hunger
you would have never gotten the update

git pull does a fetch and merge

please read a quick intro to git 
there are many on the internets

mobile mail please excuse brevity and typos

Am 22.07.2011 um 08:10 schrieb cyuczi eekc cyuczie...@gmail.com:

 thanks for that, I only had embedded-examples changed, but it looks like I
 was doing the git pull wrong, that is I was using `git fetch from upstream`
 instead of `git pull`... I actually never had to use this before :) I was
 only ever committing with git  (used svn/mercurial before though) For some
 reason I remembered (from a friend) that fetch was the way to pull.
 So I did the git pull and it worked (the counting worked as expected too,
 hooray!). Thus my bad, soz :)
 
 I am glad I didn't have to wait 3 days, I even looked into Organizations on
 github as an alternative way of getting limited (read-only) access to the
 committers' repo.
 
 Now I can continue ... xD
 
 On Fri, Jul 22, 2011 at 7:51 AM, Michael Hunger 
 michael.hun...@neotechnology.com wrote:
 
 github has no separate repo
 for the readonly url
 most probably your git pull failed due to local changes
 
 git stash
 them or use
 git pull --rebase
 
 Michael
 
 mobile mail please excuse brevity and typos
 
 Am 22.07.2011 um 04:32 schrieb cyuczi eekc cyuczie...@gmail.com:
 
 Hey, btw, the issue was fixed:
 https://trac.neo4j.org/ticket/356#comment:1
 However, github didn't yet sync the git-readonly (ie. git://
 github.com/neo4j/community.git ) and looks like I am 3-4 days back,
 since my
 HEAD is at:
 
 Minor fix to the cypher/identifiers section.
 
 https://github.com/neo4j/community/commit/dc260c269ae4e09362ada181d7b9a42e6c86560e
 
 
 nawroth https://github.com/nawroth (author)
 3 days ago
 
 as seen here: https://github.com/neo4j/community/commits/master/
 I guess that is why you didn't say anything yet (because me fetching from
 git would not be able to get the fix yet, 3 more days geezuz xD)
 
 Anyway, I'm only saying this just in case you were not aware this was
 fixed
 (apparently by someone else) and you were still working on it. Sorry, I
 already had made a ticket about this before you last replied.
 
 Thank you all, can't wait to test :)
 
 On Thu, Jul 21, 2011 at 12:13 PM, Michael Hunger 
 michael.hun...@neotechnology.com wrote:
 
 We're already on it. Looking through the causes for that issue and will
 keep you and everyone else informed.
 
 Michael
 
 Am 21.07.2011 um 06:52 schrieb cyuczi eekc:
 
 about this, should I create an issue?
 
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Re: [Neo4j] How often are Spatial snapshots published?

2011-07-22 Thread Peter Neubauer
Nolan,
saftest is to build it yourself from GITHub, I will check the
deployment. Is that ok for now?

/peter

On Fri, Jul 22, 2011 at 3:57 AM, Nolan Darilek no...@thewordnerd.info wrote:
 I'm looking at the Spatial sources from Git, and am seeing lots of
 versions of SpatialTopologyUtils.findClosestEdges that don't appear to
 be in the snapshot I'm downloading. For instance,

     public static ArrayListPointResult findClosestEdges(Point point,
             Layer layer) {


 doesn't appear to be in the snapshot build I have--that or my local
 cache is borken.

 Are these snapshots rebuilt regularly?

 Thanks.
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Re: [Neo4j] How often are Spatial snapshots published?

2011-07-22 Thread Anders Nawroth
Hi!

The deployment seems to be broken at the moment, I'll look into that ASAP.

/anders

2011-07-22 09:28, Peter Neubauer skrev:
 Nolan,
 saftest is to build it yourself from GITHub, I will check the
 deployment. Is that ok for now?

 /peter

 On Fri, Jul 22, 2011 at 3:57 AM, Nolan Darilekno...@thewordnerd.info  wrote:
 I'm looking at the Spatial sources from Git, and am seeing lots of
 versions of SpatialTopologyUtils.findClosestEdges that don't appear to
 be in the snapshot I'm downloading. For instance,

  public static ArrayListPointResult  findClosestEdges(Point point,
  Layer layer) {


 doesn't appear to be in the snapshot build I have--that or my local
 cache is borken.

 Are these snapshots rebuilt regularly?

 Thanks.
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Re: [Neo4j] How often are Spatial snapshots published?

2011-07-22 Thread Craig Taverner
Interesting that if you look at the github 'blame' for that file (see
https://github.com/neo4j/neo4j-spatial/blame/master/src/main/java/org/neo4j/gis/spatial/SpatialTopologyUtils.java),
you find that all the findClosestEdges methods where added in October 2010.
So if Nolan has a version older than that, then something weird is going on.
He must have the very first version from September 2010, which is not
compatible with any recent Neo4, Geotools or uDig.

When I look at m2.neo4j.org I can see that the latest 0.6-SNAPSHOT is from
May. So we do have a problem, but not one that takes us back to last
September.

Nolan, perhaps your pom.xml refers to an older neo4j-spatial? You should use
0.6-SNAPSHOT. And we will change that again soon (to 0.7) since we are
making changes to the geoprocessing and indexing.

On Fri, Jul 22, 2011 at 10:04 AM, Anders Nawroth
and...@neotechnology.comwrote:

 Hi!

 The deployment seems to be broken at the moment, I'll look into that ASAP.

 /anders

 2011-07-22 09:28, Peter Neubauer skrev:
  Nolan,
  saftest is to build it yourself from GITHub, I will check the
  deployment. Is that ok for now?
 
  /peter
 
  On Fri, Jul 22, 2011 at 3:57 AM, Nolan Darilekno...@thewordnerd.info
  wrote:
  I'm looking at the Spatial sources from Git, and am seeing lots of
  versions of SpatialTopologyUtils.findClosestEdges that don't appear to
  be in the snapshot I'm downloading. For instance,
 
   public static ArrayListPointResult  findClosestEdges(Point point,
   Layer layer) {
 
 
  doesn't appear to be in the snapshot build I have--that or my local
  cache is borken.
 
  Are these snapshots rebuilt regularly?
 
  Thanks.
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[Neo4j] Using neo4j spatial in non maven projects

2011-07-22 Thread craig.taverner
Hi,

I received a message on github asking how to setup the dependencies for
using neo4j-spatial in a non-maven project, and I replied there, but thought
this should also be posted to the neo4j mailing list in case it is of
interest to others.

Even if you don't use maven for your own project, you could still use maven
to grab all the dependencies once and then manually add them to your
project. For example, in neo4j-spatial/pom.xml, we have the maven target
dependency:copy-dependencies that will copy all the jars into
target/dependency. Then you can copy those to your application.

git clone git://github.com/neo4j/neo4j-spatial.git
cd neo4j-spatial
mvn dependency:copy-dependencies
cp -a target/dependency/* ~/my-app/lib/

You also started to describe a little about your applications requirements.
Do you want advice on the graph model? We support importing OSM, but it
sounds like you have a modified OSM model of your own. Either just import
your data as you see fit (and write a GeometryEncoder to map to spatial), or
use our OSM importer and add your own extra graph constructs to the OSM
graph (eg. add direct relationships between some nodes specific for your
routing algorithms), then you have the standard OSM (for map rendering,
etc.) and your routing graph combined. We have been thinking of doing that
anyway for routing, since OSM 'out the box' is not ideal for routing.

Regards, Craig

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[Neo4j] How to download neo4j 1.3 [for using jo4Neo]

2011-07-22 Thread BatiG
Hi everybody,

I'd like to download the version 1.3 of neo4j. Where could I find the URL to
download it?

By the way, does someone know jo4neo? Because I'm trying to use jo4neo and
neo4j-server but without success. Maybe someone have a great advise for me
to use the both together.

Many thanks,

Bat

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Re: [Neo4j] How to download neo4j 1.3 [for using jo4Neo]

2011-07-22 Thread Peter Neubauer
Hi there,
I don't think there is much support for jo4neo around, as it is superseded
by Spring Data Graph. Could you please try that instead?

/peter

Sent from my phone.
On Jul 22, 2011 12:12 PM, BatiG batistutagabrielf...@gmail.com wrote:
 Hi everybody,

 I'd like to download the version 1.3 of neo4j. Where could I find the URL
to
 download it?

 By the way, does someone know jo4neo? Because I'm trying to use jo4neo and
 neo4j-server but without success. Maybe someone have a great advise for me
 to use the both together.

 Many thanks,

 Bat

 --
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Re: [Neo4j] How to download neo4j 1.3 [for using jo4Neo]

2011-07-22 Thread BatiG
You mean that Jo4neo is dead and It has been replaced by Spring Data Graph?

Is Sping Data graph stable? 

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Re: [Neo4j] Best way to find all the relationships between nodes which in a list

2011-07-22 Thread Peter Neubauer
Hi there,
Cypher does not let you address the ID directly (yet) in the where
parts. Michael, Andres, WDYT of supporting it?

Cheers,

/peter neubauer

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On Wed, Jul 20, 2011 at 3:03 AM, Jingex gulei...@zju.edu.cn wrote:
 Hi all,

 In a case we have several people, name:Mike,Jack,John,
 as their node id are:1,2,3
 We want to find out all the relationships between them.

 Use Cypher, the query like this:

 start n = (1,2,3)
 mathch (n)-[r]-(people)
 where people.name = Mike or people.name = Jack or people.name = John
 return n.name,r.type,people.name

 So, is it possible to use node ID as filter in the WHERE part, just as START
 part? Such as where people.id = (1,2,3)? Or return all the (people) related
 with (n), than filter the ID in return results?
 IN and BETWEEN are usefull operators, especially when you have a long list.
 As far as I know, now I have to use a lot of or to find out all the
 possible?

 Thanks
 Alfred

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[Neo4j] Number of properties on a PropertyContainer

2011-07-22 Thread Niels Hoogeveen

Last night while working on some enhancements on the Neo4J API, I set up a 
method to lookup the name of a relationship, to facilitate the creation of 
associated nodes.
The method I use, is to create a node (which can be found through the reference 
node) and on this node create a property for each relationship name. The value 
of the property is the node id of the associated node.
My question is if this scales properly. It is unlikely any Neo4J store will 
contain millions of relationship types, but it is conceivable that there may be 
over ten thousand relationship types in a store. Will this solution still work 
under such conditions, or is it better to create a relationship for each 
relationship type and store the node id of the associated node in the relation.
Niels 
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Re: [Neo4j] Number of properties on a PropertyContainer

2011-07-22 Thread Rick Bullotta
That's a perfect use case for a super trivial Lucene index, no?  Would seem to 
be a much easier solution with much faster lookup...and built into Neo4J.


From: user-boun...@lists.neo4j.org [user-boun...@lists.neo4j.org] On Behalf Of 
Niels Hoogeveen [pd_aficion...@hotmail.com]
Sent: Friday, July 22, 2011 8:21 AM
To: user@lists.neo4j.org
Subject: [Neo4j] Number of properties on a PropertyContainer

Last night while working on some enhancements on the Neo4J API, I set up a 
method to lookup the name of a relationship, to facilitate the creation of 
associated nodes.
The method I use, is to create a node (which can be found through the reference 
node) and on this node create a property for each relationship name. The value 
of the property is the node id of the associated node.
My question is if this scales properly. It is unlikely any Neo4J store will 
contain millions of relationship types, but it is conceivable that there may be 
over ten thousand relationship types in a store. Will this solution still work 
under such conditions, or is it better to create a relationship for each 
relationship type and store the node id of the associated node in the relation.
Niels
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Re: [Neo4j] Number of properties on a PropertyContainer

2011-07-22 Thread Niels Hoogeveen

This certainly can be done with a Lucene lookup, I am just not so sure if the 
lookup is actually faster. 

 From: rick.bullo...@thingworx.com
 To: user@lists.neo4j.org
 Date: Fri, 22 Jul 2011 05:41:09 -0700
 Subject: Re: [Neo4j] Number of properties on a PropertyContainer
 
 That's a perfect use case for a super trivial Lucene index, no?  Would seem 
 to be a much easier solution with much faster lookup...and built into Neo4J.
 
 
 From: user-boun...@lists.neo4j.org [user-boun...@lists.neo4j.org] On Behalf 
 Of Niels Hoogeveen [pd_aficion...@hotmail.com]
 Sent: Friday, July 22, 2011 8:21 AM
 To: user@lists.neo4j.org
 Subject: [Neo4j] Number of properties on a PropertyContainer
 
 Last night while working on some enhancements on the Neo4J API, I set up a 
 method to lookup the name of a relationship, to facilitate the creation of 
 associated nodes.
 The method I use, is to create a node (which can be found through the 
 reference node) and on this node create a property for each relationship 
 name. The value of the property is the node id of the associated node.
 My question is if this scales properly. It is unlikely any Neo4J store will 
 contain millions of relationship types, but it is conceivable that there may 
 be over ten thousand relationship types in a store. Will this solution still 
 work under such conditions, or is it better to create a relationship for each 
 relationship type and store the node id of the associated node in the 
 relation.
 Niels
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Re: [Neo4j] How to download neo4j 1.3 [for using jo4Neo]

2011-07-22 Thread BatiG
Do you know an another framework that makes POJO as jo4neo or Spring Data
Graph?
I'd like to test everything before choosing.

Thanks

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Re: [Neo4j] How to download neo4j 1.3 [for using jo4Neo]

2011-07-22 Thread Peter Neubauer
Hi there,
you could also try https://github.com/tinkerpop/frames/wiki which
supports Neo4j. Otherwise, there is a number of non-java bindings for
JRuby, Python, Scala and others.

Cheers,

/peter neubauer

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On Fri, Jul 22, 2011 at 2:46 PM, BatiG batistutagabrielf...@gmail.com wrote:
 Do you know an another framework that makes POJO as jo4neo or Spring Data
 Graph?
 I'd like to test everything before choosing.

 Thanks

 --
 View this message in context: 
 http://neo4j-community-discussions.438527.n3.nabble.com/How-to-download-neo4j-1-3-for-using-jo4Neo-tp3191002p3191250.html
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Re: [Neo4j] Number of properties on a PropertyContainer

2011-07-22 Thread Mattias Persson
Loading one property on a node results in the entire property chain being
loaded, i.e. if you have numeric values all properties will be loaded on the
first getProperty request on that node... after that it's a HashMap lookup
from the key to the value. So the first getProperty (if that node hasn't
been loaded yet or it has been loaded but flushed out of the cache to make
room for other more frequently used nodes) will be slow (a sequential scan
through all properties), all other will be very fast.

2011/7/22 Niels Hoogeveen pd_aficion...@hotmail.com


 This certainly can be done with a Lucene lookup, I am just not so sure if
 the lookup is actually faster.

  From: rick.bullo...@thingworx.com
  To: user@lists.neo4j.org
  Date: Fri, 22 Jul 2011 05:41:09 -0700
  Subject: Re: [Neo4j] Number of properties on a PropertyContainer
 
  That's a perfect use case for a super trivial Lucene index, no?  Would
 seem to be a much easier solution with much faster lookup...and built into
 Neo4J.
 
  
  From: user-boun...@lists.neo4j.org [user-boun...@lists.neo4j.org] On
 Behalf Of Niels Hoogeveen [pd_aficion...@hotmail.com]
  Sent: Friday, July 22, 2011 8:21 AM
  To: user@lists.neo4j.org
  Subject: [Neo4j] Number of properties on a PropertyContainer
 
  Last night while working on some enhancements on the Neo4J API, I set up
 a method to lookup the name of a relationship, to facilitate the creation of
 associated nodes.
  The method I use, is to create a node (which can be found through the
 reference node) and on this node create a property for each relationship
 name. The value of the property is the node id of the associated node.
  My question is if this scales properly. It is unlikely any Neo4J store
 will contain millions of relationship types, but it is conceivable that
 there may be over ten thousand relationship types in a store. Will this
 solution still work under such conditions, or is it better to create a
 relationship for each relationship type and store the node id of the
 associated node in the relation.
  Niels
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-- 
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Hacker, Neo Technology
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[Neo4j] neo4j.py install problems

2011-07-22 Thread Eddy
I'm getting error after error trying to get neo4j.py working. Right now I'm
stuck at a problem that appears to be the same as this ticket 
https://trac.neo4j.org/ticket/275 https://trac.neo4j.org/ticket/275 . But it
doesn't actually say how to go about solving it.

I don't actually have to go back to an older version of Neo4j do I?

*Python:*
import os, sys, traceback
from neo4j import *

java_home = os.getenv(JAVA_HOME) #I registered JAVA_HOME but python
wouldn't pick it up so I added it manually
if(java_home == None):
os.environ[JAVA_HOME] = /usr/lib/jvm/java-6-openjdk

graphdb = GraphDatabase(/srv/neo4j/databases/graph.db,
classpath=[/usr/share/java/neo4j-kernel.jar], log=True)

*Error:*
[Fri Jul 22 20:19:12 2011] [info] [client 10.211.55.2] mod_wsgi (pid=1885,
process='', application='directory.private.com|'): Loading WSGI script
'/var/www/production/directory.private.com/start.wsgi'.
[Fri Jul 22 20:19:12 2011] [error]
/var/www/production/directory.private.com/lib/dispatch/core/wsgi.py:53:
SyntaxWarning: import * only allowed at module level
[Fri Jul 22 20:19:12 2011] [error]   def __call__(self, environ,
start_response):
[Fri Jul 22 20:19:12 2011] [error]
/usr/lib/pymodules/python2.6/jpype/_pykeywords.py:18: DeprecationWarning:
the sets module is deprecated
[Fri Jul 22 20:19:12 2011] [error]   import sets
[Fri Jul 22 20:19:12 2011] [info] mod_wsgi (pid=1899): Initializing Python.
[Fri Jul 22 20:19:12 2011] [info] mod_wsgi (pid=1899): Attach interpreter
''.
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2] mod_wsgi (pid=1885):
Exception occurred processing WSGI script
'/var/www/production/directory.private.com/start.wsgi'.
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2] Traceback (most
recent call last):
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2]   File
/var/www/production/directory.private.com/lib/dispatch/core/wsgi.py, line
75, in __call__
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2] graphdb =
GraphDatabase(/srv/neo4j/databases/graph.db,
classpath=[/usr/share/java/neo4j-kernel.jar], log=True)
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2]   File
/usr/local/lib/python2.6/dist-packages/Neo4j.py-0.1_SNAPSHOT-py2.6.egg/neo4j/__init__.py,
line 522, in __new__
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2] neo =
core.load_neo(resource_uri, params)
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2]   File
/usr/local/lib/python2.6/dist-packages/Neo4j.py-0.1_SNAPSHOT-py2.6.egg/neo4j/_core.py,
line 332, in load_neo
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2] return
load_neo(resource_uri, parameters)
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2]   File
/usr/local/lib/python2.6/dist-packages/Neo4j.py-0.1_SNAPSHOT-py2.6.egg/neo4j/_core.py,
line 225, in load_neo
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2] return
GraphDatabase(resource_uri, settings, config, log)
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2]   File
/usr/local/lib/python2.6/dist-packages/Neo4j.py-0.1_SNAPSHOT-py2.6.egg/neo4j/_core.py,
line 230, in __init__
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2] neo =
backend.load_neo(resource_uri, settings)
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2]   File
/usr/local/lib/python2.6/dist-packages/Neo4j.py-0.1_SNAPSHOT-py2.6.egg/neo4j/_backend/__init__.py,
line 74, in load_neo
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2] return
impl(resource_uri, implementation.make_map(settings))
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2]   File
/usr/lib/pymodules/python2.6/jpype/_jclass.py, line 79, in _javaInit
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2]
self.__javaobject__ = self.__class__.__javaclass__.newClassInstance(*args)
[Fri Jul 22 20:19:12 2011] [error] [client 10.211.55.2]
java.lang.RuntimeExceptionPyRaisable:
org.neo4j.kernel.impl.transaction.TransactionFailureException: Could not
create data source [nioneodb], see nested exception for cause of error

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Re: [Neo4j] How to download neo4j 1.3 [for using jo4Neo]

2011-07-22 Thread BatiG
Spring Graph Database is not really what I want. And It could be very hard to
deploy that on BlazeDS [
http://opensource.adobe.com/wiki/display/blazeds/BlazeDS
http://opensource.adobe.com/wiki/display/blazeds/BlazeDS ].

Do you know the developpers of jo4neo? Is it possible to help them to
upgrade jo4neo?

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Re: [Neo4j] How to download neo4j 1.3 [for using jo4Neo]

2011-07-22 Thread Michael Hunger
probably I can look into it

what are the your issues with spring data graph?


Michael

mobile mail please excuse brevity and typos

Am 22.07.2011 um 16:38 schrieb BatiG batistutagabrielf...@gmail.com:

 Spring Graph Database is not really what I want. And It could be very hard to
 deploy that on BlazeDS [
 http://opensource.adobe.com/wiki/display/blazeds/BlazeDS
 http://opensource.adobe.com/wiki/display/blazeds/BlazeDS ].
 
 Do you know the developpers of jo4neo? Is it possible to help them to
 upgrade jo4neo?
 
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Re: [Neo4j] How to download neo4j 1.3 [for using jo4Neo]

2011-07-22 Thread BatiG
You could look into the code of jo4neo? It could be very usefull and
powerfull for everybody!!

I mean, with jo4neo, you can create very easly withtout configuration a
Graph Database and we could have the web administration. With Spring, you
need to configure a lof of files and for myself, I've already a web
application running on my server. So it means that, if I use Spring, the
both applications shall communicate together... It could be very difficult
to deploy that...

However, with jo4neo, I can include the code using jo4neo as a library
(.jar) in my running web application : very easy!


Thanks

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Re: [Neo4j] How often are Spatial snapshots published?

2011-07-22 Thread Nolan Darilek
Not sure what's up, but I went ahead and built from Git. All's well now.

On 07/22/2011 02:28 AM, Peter Neubauer wrote:
 Nolan,
 saftest is to build it yourself from GITHub, I will check the
 deployment. Is that ok for now?

 /peter

 On Fri, Jul 22, 2011 at 3:57 AM, Nolan Darilekno...@thewordnerd.info  wrote:
 I'm looking at the Spatial sources from Git, and am seeing lots of
 versions of SpatialTopologyUtils.findClosestEdges that don't appear to
 be in the snapshot I'm downloading. For instance,

  public static ArrayListPointResult  findClosestEdges(Point point,
  Layer layer) {


 doesn't appear to be in the snapshot build I have--that or my local
 cache is borken.

 Are these snapshots rebuilt regularly?

 Thanks.
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Re: [Neo4j] How to download neo4j 1.3 [for using jo4Neo]

2011-07-22 Thread Michael Hunger
You can add Spring Data Graph to any existing Webapp as well. Just saying.
I don't think it is difficult to deploy that. Just add SDG to your domain layer.

Anyway, whatever approach you use for Object-Graph-Mapping against a remote 
Server
you should be aware that the performance limitations of the REST API will 
affect the very
fine grained Mapping Operations.

By default jo4neo only works with an embedded Neo4j database. We'll see how it 
works out remotely.

Cheers

Michael

Am 22.07.2011 um 16:55 schrieb BatiG:

 You could look into the code of jo4neo? It could be very usefull and
 powerfull for everybody!!
 
 I mean, with jo4neo, you can create very easly withtout configuration a
 Graph Database and we could have the web administration. With Spring, you
 need to configure a lof of files and for myself, I've already a web
 application running on my server. So it means that, if I use Spring, the
 both applications shall communicate together... It could be very difficult
 to deploy that...
 
 However, with jo4neo, I can include the code using jo4neo as a library
 (.jar) in my running web application : very easy!
 
 
 Thanks
 
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Re: [Neo4j] More spatial questions

2011-07-22 Thread Nolan Darilek
OK, thanks for this. Unfortunately my project is getting less attention 
now than it ever has, but I finally sat down and reworked my 
architecture. Instead of working with Neo4J Nodes, I've reworked my 
library to use SpatialDatabaseRecord and am now having a bit more success.

I have three more query types to implement, and I'm not immediately 
seeing how to do this using the OSM API. I'm not sure if I need to drop 
to the lower-level JTS searches for these, so any guidance would be 
appreciated. Note that, in all that follows, node means OSM node, not 
Neo4J node:

   def nearestWay(lat:Double, lon:Double, 
allowedTypes:Option[List[String]] = None) = {

Finds the nearest way to a given lat, lon. The list of allowed types 
lets me filter out power lines, footways, etc. by specifying values for 
the highway= tag.

   def nearestNodeWithWay(lat:Double, lon:Double, 
allowedTypes:Option[List[String]]) = {

Finds the nearest node on any way.

   def waysForNode(n:Node) = {

Lists the ways on which a given node is found. OSMDataset lets me do the 
opposite and returns the nodes for a way, but I don't immediately see a 
way to do this.

Thanks.


On 06/19/2011 04:47 PM, Craig Taverner wrote:
 Hi Nolan,

 I think I can answer a few of your questions. Firstly, some background. The
 graph model of the OSM data is based largely on the XML formated OSM
 documents, and there you will find 'nodes', 'ways', 'relations' and 'tags'
 each as their own xml-tag, and as a consequence each will also have their
 own neo4j-node in the graph. Another point is that the geometry can be based
 on one or more nodes or ways, and so we always create another node for the
 geometry, and link it to the osm-node, way or relation that represents that
 geometry.

 What all this boils down to is that you cannot find the tags on the geometry
 node itself. You cannot even find the location on that node. If you want to
 use the graph model in a direct way, as you have been trying, you really do
 need to know how the OSM data is modeled. For example, for a LineString
 geometry, you would need to traverse from the geometry node to the way node
 and finally to the tags node (to get the tags). To get to the locations is
 even more complex. Rather than do that, I would suggest that you work with
 the OSM API we provided with the OSMLayer, OSMDataset and OSMGeometryEncoder
 classes. Then you do not need to know the graph model at all.

 For example, OSMDataset has a method for getting a Way object from a node,
 and the returned object can be queried for its nodes, geometry, etc.
 Currently we provide methods for returning neo4j-nodes as well as objects
 that make spatial sense. One minor issue here is the ambiguity inherent in
 the fact that both neo4j and OSM make use of the term 'node', but for
 different things. We have various solutions to this, sometimes replacing
 'node' with 'point' and sometimes prefixing with 'osm'. The unit tests in
 TestsForDocs includes some tests for the OSM API.

 My first goal is to find the nearest OSM node to a given lat, lon. My
 attempts seem to be made of fail thus far, however. Here's my code:

 Most of the OSM dataset is converted into LineStrings, and what you really
 want to do is find the closest vertex of the closest LineString. We have a
 utility function 'findClosestEdges' in the SpatialTopologyUtils class for
 that. The unit tests in TestSpatialUtils, and the testSnapping() method in
 particular, show use of this.

 My thinking is that nodes should be represented as points, so I can't
 see why this fails. When I run this in a REPL, I do get a node back. So
 far so good. Next, I want to get the node's tags. So I run:

 The spatial search will return 'geometries', which are spatial objects. In
 neo4j-spatial every geometry is represented by a unique node, but it is not
 required that that node contain coordinates or tags. That is up to the
 GeometryEncoder. In the case of the OSM model, this information is
 elsewhere, because of the nature of the OSM graph, which is a highly
 interconnected network of points, most of which do not represent Point
 geometries, but are part of much more complex geometries (streets, regions,
 buildings, etc.).

 n.getSingleRelationship(OSMRelation.TAGS, Direction.INCOMING)
 The geometry node is not connected directly to the tags node. You need two
 steps to get there. But again, rather than figure out the graph yourself,
 use the API. In this case, instead of getting the geometry node from the
 SpatialDatabaseRecord, rather just get the properties using getPropertyNames
 and getProperty(String). This API works the same on all kinds of spatial
 data, and in the case of OSM data will return the TAGS, since those are
 interpreted as attributes of the geometries.

 n.getSingleRelationship(OSMRelationship.GEOM,
 Direction.INCOMING).getOtherNode(n).getPropertyKeys
 I see what appears to be a series of tags (oneway, name, etc.) Why are
 these being returned for OSMRelation.GEOM 

[Neo4j] Neo4j server - Gremlin plugin - line break in script

2011-07-22 Thread Guillaume ALLEE
Hi,


I am using neo4j server 1.4. I want to send a gremin script (which is ok
with script with one line). I am wondering if I can send script with line
break in it. 

I currently have 
/message: Illegal unquoted character ((CTRL-CHAR, code 10)): has to be
escaped using backslash to be included in string value at [Source:
java.io.StringReader@fde4e6; line: 1, column: 21],
exception: org.neo4j.server.rest.repr.BadInputException: Illegal unquoted
character ((CTRL-CHAR, code 10)): has to be escaped using backslash to be
included in string value at [Source: java.io.StringReader@fde4e6; line: 1,
column: 21],
stacktrace: [(36)/



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Re: [Neo4j] Neo4j server - Gremlin plugin - line break in script

2011-07-22 Thread Peter Neubauer
Guillaume,
Are you sending it via the rest plugin? In docs.neo4j.org the sample graph
example is using multiple lines, separated by semicolon.

/peter

Sent from my phone.
On Jul 22, 2011 6:17 PM, Guillaume ALLEE guillaume.al...@capgemini.com
wrote:
 Hi,


 I am using neo4j server 1.4. I want to send a gremin script (which is ok
 with script with one line). I am wondering if I can send script with line
 break in it.

 I currently have
 /message: Illegal unquoted character ((CTRL-CHAR, code 10)): has to be
 escaped using backslash to be included in string value at [Source:
 java.io.StringReader@fde4e6; line: 1, column: 21],
 exception: org.neo4j.server.rest.repr.BadInputException: Illegal
unquoted
 character ((CTRL-CHAR, code 10)): has to be escaped using backslash to be
 included in string value at [Source: java.io.StringReader@fde4e6; line: 1,
 column: 21],
 stacktrace: [(36)/



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Re: [Neo4j] NoSuchElementException

2011-07-22 Thread Mattias Persson
2011/7/18 sulabh choudhury sula...@gmail.com

 Though when I think about it, I guess I would still have the issue of
 getting duplicate nodes.

 Say I have 1 million node1, node2, rel entries to put in Neo,
 What you are suggesting is that I do a Batch of all sets of node1,node2
 first and then flush and go about inserting all rels in the next batch
 insert
 Since I can have duplicate nodes in the 1million entries, how do I make
 sure that all the nodes within a Batch insert are unique?

 Do I maintain another index within a batch insert (say a
 hahmap) which would have entries of node and its indices, or is there a
 better way ?

 If the dataset is small enough you could have it in a HashMap, but
otherwise you could run that set through some pre-processing before
inserting which removes duplicates... I think that would be the best
alternative.


 On Mon, Jul 18, 2011 at 11:39 AM, sulabh choudhury sula...@gmail.comwrote:

 Makes sense. Will try that.
 Thanks.


 On Fri, Jul 15, 2011 at 2:59 PM, sulabh choudhury sula...@gmail.comwrote:

 Well while inserting the nodes I keep a
 check batchInserter.nodeExists(node1) so I would guess a node would not be
 duplicated.
 Otherwise during a traversal I guess duplicate nodes. IIs there a way I
 can look into the BtachInsert data before I flush so that I can make sure no
 duplicate data has been inserted ?

 On Sat, Jun 25, 2011 at 10:49 AM, sulabh choudhury sula...@gmail.comwrote:

 Thank you Jim.
 I will wait for 1.5 and hope it resolves the issue :)


 On Fri, Jun 24, 2011 at 7:11 PM, sulabh choudhury sula...@gmail.comwrote:

 Hi,

 I just downloaded the neo4j-community-1.4.M04. I stumbled into the
 java.util.NoSuchElementException: More than one element in
 org.neo4j.index.impl.lucene.LuceneIndex$1@396cbd97. First element is
 'Node[3]' and the second element is 'Node[2]'
  at
 org.neo4j.helpers.collection.IteratorUtil.singleOrNull(IteratorUtil.java:114)
 ~[working_graphGen.jar:na]
 at
 org.neo4j.index.impl.lucene.IdToEntityIterator.getSingle(IdToEntityIterator.java:88)
 ~[working_graphGen.jar:na]
  at
 org.neo4j.index.impl.lucene.IdToEntityIterator.getSingle(IdToEntityIterator.java:32)
 ~[working_graphGen.jar:na]

 I looked up and found that this is a bug and has been fixed. I was
 wondering if the fix has been incorporated in the latest Milestone or not?




 --

 --
 Thanks and Regards,
 Sulabh Choudhury




 --

 --
 Thanks and Regards,
 Sulabh Choudhury










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www.neotechnology.com
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[Neo4j] help for Traverser

2011-07-22 Thread sulabh choudhury
Hi,

I am trying to create a traverser and I am stuck.
So my code takes in a startNode, 2 relationshiptypes and 2 directions.
It will starting from startNode go to nodes with rel1 in dir1 and from all
those nodes to rel2,dir2.
The code below (in SCALA) works fine and I get the expected nodes.

The issue is, along with the nodes I also need to get properties from the
relationships. So all my relationshiptypes have certain properties (key,
value), what I want is to get a particular property from rel1 and rel2. How
do I do that?


 def traverser(node: Node, rel1: RelationshipType, rel2: RelationshipType,
dir1: Direction, dir2: Direction) = {

   val q1 =  node.traverse(Order.BREADTH_FIRST, StopEvaluator.DEPTH_ONE,
ReturnableEvaluator.ALL_BUT_START_NODE, rel1, dir1).iterator()

while(q1.hasNext){
  val n = q1.next()
  val q2 =
n.traverse(Order.BREADTH_FIRST,StopEvaluator.DEPTH_ONE,ReturnableEvaluator.ALL_BUT_START_NODE,
rel2, dir2).iterator()
  while(q2.hasNext)
   println(q2.next)
   }
}
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[Neo4j] GSoC 2011 Neo4j Geoprocessing | Weekly Report #8

2011-07-22 Thread Andreas Wilhelm
Hi,

This week I started with my second phase of GSOC which means to create 
an Neo4j geoprocessing example in uDig.
For that I set up the development environment for uDig.

Also added some more code comments to the spatial functions and 
installed the doc-toolchain for Neo4j (Spatial).

Currently I´m checking the GeoServer integration of Neo4j Spatial.

Best Regards

Andreas

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Re: [Neo4j] GSoC 2011 Neo4j Geoprocessing | Weekly Report #8

2011-07-22 Thread reyman
Hi,

First, thanks a lot for your work :)

If you have time, i post a bug on github about the integration of
neo4jSpatial into geoserver,
if you want some help on this point, i'am here and ready ! ;)

https://github.com/neo4j/neo4j-spatial/issues/12

Best regards,
SRey.



On Fri, Jul 22, 2011 at 8:52 PM, Andreas Wilhelm a...@kabelbw.de wrote:

 Hi,

 This week I started with my second phase of GSOC which means to create
 an Neo4j geoprocessing example in uDig.
 For that I set up the development environment for uDig.

 Also added some more code comments to the spatial functions and
 installed the doc-toolchain for Neo4j (Spatial).

 Currently I´m checking the GeoServer integration of Neo4j Spatial.

 Best Regards

 Andreas

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Re: [Neo4j] Officially supported mechanism for J2EE

2011-07-22 Thread eialbur
Sorry for the quantity of my questions, and I apologize in advance if any of
them are trivial or stupid.


ok - so I guess that in my Session Bean I would use the regular old
@Resource annotation:
@Resource
GraphDatabaseService graphDb;


Or do I need to declare Neo to jndi and then reference it? 
@Resource(name=neo/myGraphDb)
GraphDatabaseService graphDb;


Do I have to update the server.xml file so graphDb knows what to open?  I am
assuming that there is no connection pooling.  I am assuming that my Session
Bean does not need to be a Singleton.

Is an alternative for me to actually open in ejbCreate?
As you stated, it is important to release everything when I'm done ... would
that be done thru ejbRemove?


OK - so now I'll need XA transaction support.  I have never done anything
with XA.  I am trying to look up articles on Google for Glassfish ... so far
I have found very little.  I'm not sure yet if Glassfish has built-in
support for XA (I'm assuming it does) and I can just use the
javax.transaction package, or if I have to do special app server
configuration ... and not yet sure if/how to set it all up as a container
managed transaction.  Can you tell I am not yet comfortable with J2EE?  :-)  

Frankly, I am evaluating the use cases to see if I ever need to share a
transaction with the database or if they are always separate (or if I can
design so they are always separate).  I am essentially using Neo4j as a
hierarchic index against a mysql table ..  lots of queries but very very few
inserts or updates. 




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Re: [Neo4j] NOSQL article on InfoWorld

2011-07-22 Thread Charles Bedon
Hello

There's also a thread on the article at Slashdot:


http://it.slashdot.org/story/11/07/21/1858250/Making-Sense-of-the-NoSQL-Standouts

-
Charles Edward Bedón Cortázar
ITIL Foundation Certified
Open Source Network Inventory for the masses!  http://kuwaiba.sourceforge.net | 
Follow Kuwaiba on Twitter
Linux Registered User #38



 Am Thu, 21 Jul 2011 07:40:02 -0500 Michael Hunger 
lt;michael.hun...@neotechnology.comgt; schrieb  


Hey Graphistas, 
 
there is a new article on NOSQL databases on InfoWorld. The part for Neo4j is 
badly researched. If anyone of you thinks he could add some useful information 
for the reader, please do so in the commenting section. 
 
Thanks so much 
 
Michael 
 
http://www.infoworld.com/d/data-explosion/no-sql-new-databases-new-applications-400?page=0,4
 
 
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Re: [Neo4j] Hyperedges and Objects

2011-07-22 Thread Niels Hoogeveen

I simplified the implementation of the enhanced API, mostly removal of code 
duplication, and added support of a property value associated node.
Looking for feedback, especially with regard to the defined interfaces.
Use of the enhanced features of the API has consequences for the name/node 
space:
Relationships: an additional property may be created on the 
relationship.PropertyTypes: may create nodes as a subref of the reference 
node.RelationshipTypes: may create nodes as a subref of the reference 
node.Properties: an additional property (per property) may be create on the 
node.

Niels
 From: pd_aficion...@hotmail.com
 To: user@lists.neo4j.org
 Date: Fri, 22 Jul 2011 04:00:18 +0200
 Subject: Re: [Neo4j] Hyperedges and Objects
 
 
 I uploaded the first edit (still needs to completely be tested - IS-PRE-ALPHA 
 quality) of the enhanced API.
 
 See: 
 https://github.com/peterneubauer/graph-collections/tree/master/src/main/java/org/neo4j/collections/graphdb
 
 The enhanced API has several new features:
 
 
 1.) A new interface RelationshipContainer, supporting createRelation, 
 getRelation,  and hasRelation methods.
 
 
 2.) Relationship implements RelationshipContainer so relationships to and 
 from relationships can be created.
 A relationship property is maintained containing the node ID of an associated 
 node. This node is lazily created (and with that the relationship property is 
 set).
 Relationships are stored on the associated node, while properties are stored 
 on the relationship itself.
 
 
 3.) EnhancedRelationshipType implements RelationshipContainer (and with that 
 PropertyContainer) so RelationshipTypes can have properties and relationships.
 
 A node associated with a RelationshipType is created lazily. From the 
 reference node a RELTYPE_SUBREF relation points to a node, containing 
 properties corresponding to RelationshipType names. The value of this 
 property is the node ID of the RelationshipType associated node.
 
 All relationships creation to and from a EnhancedRelationshipType and all 
 properties setting on a EnhancedRelationshipType are performed on the 
 associated node. 
 All retrievals are done from the associated node. 
 
 The associated node is created the first time it is needed.
 
 4.) PropertyType implements RelationshipContainer (and with that 
 PropertyContainer). PropertyTypes can be used in getProperty, setProperty and 
 hasProperty style operations.
 
 PropertyTypes are parameterized with the datatype of the property. This makes 
 it possible to support methods such as: T getPropertyValue(PropertyType) 
 and  setProperty(PropertyTypeT, T) that guard property values added conform 
 to the datatype presumed by the PropertyType and property values are returned 
 typed.
 
 A node associated with a PropertyType is created lazily. From the reference 
 node a PROPTYPE_SUBREF relation points to a node, which points to nodes per 
 datatype. 
 These datatype related nodes contain properties corresponding to PropertyType 
 names. 
 
 All relationships creation to and from a PropertyType and all properties 
 setting on a PropertyType are performed on the associated node. All 
 retrievals are done from the associated node. 
 
 The associated node is created the first time it is needed.
 
 5.) GraphDatabaseService allows for the lookup of PropertyTypes and 
 RelationshipTypes and enhanced Nodes and Relationships.
 
 
 6.) Property implements RelationshipContainer (and with that 
 PropertyContainer). //TODO 
 A node associated to a property is created lazily, allowing properties to 
 have relationships and properties. 
 The associated node is created the first time it is needed.
 
 With these enhancements, all elements of Neo4j (Node, Relationship, 
 RelationshipType, property name and property value) are unified, sharing a 
 common interface RelationshipContainer (and with that PropertyContainer). 
 Node and Relationship also extend their original interfaces, so the API is a 
 drop-in replacement for the original API.
 
 Both ProperyType and RelatioshipType now provide the necessary methods to 
 implement a type/class system on top of Neo4j, but nothing imposes a 
 type/class system.
 
 Being able to create Relationships to and from Relationships opens the way to 
 a transparent implementation of n-ary relationships.
 
 
 This is all neat, I believe, but I would be really happy if there could be 
 some support in core to hide the implementation a bit more.
 
 Now:
 
 1.) Relationships can have a property containing the node ID of the 
 associated node. This polutes the namespace, so it would be better if there 
 were a setLong and getLong method on Relationship, where the node ID can be 
 stored, keeping the property name away from the property namespace.
 
 2.) Named persistent maps from String to PropertyContainer. This would 
 eliminate the REL_SUBREF related node and the PROP_SUBREF related nodes. It 
 would be nice if these enhancements didn't polute the node space. 

Re: [Neo4j] Neo4j server - Gremlin plugin - line break in script

2011-07-22 Thread Guillaume ALLEE
Hi Peter,

Thanks for your answer. I knew that it was possible to put semi colons for
line break ;-)

To be more precise, I have the following script that was given kindly given
by Marko on another thread.

   m = [:] 
g.idx('id')[[object_type:'A']].transform{ 
if(it.out('USES'){it.object_type.equals('B')}.count()  1) 
count = 1 
else 
count  1 
}.groupCount(m)  -1 
m 

I know it is possible to do the same following in one line  (see below)
however I would like, for more readability to be able to submit it to the
REST gremlin plugin with multiple lines.

m = [:]
;g.idx('id')[[object_type:'A']].transform{if(it.out('USES'){it.object_type.equals('B')}.count()
 1) count = 1 else count  1}.groupCount(m)  -1 ; m  


Guillaume in holiday tonight  ;-)

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Re: [Neo4j] Neo4j server - Gremlin plugin - line break in script

2011-07-22 Thread Peter Neubauer
Mmh,
ok, I get the thought. Will see how we could do that. How would you
like to submit this? JSON with \n instead of ;? Wanna write a test
for this.

Now back to parental leave and the catastrophe in Norway.

Cheers,

/peter neubauer

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Skype       peter.neubauer
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http://startupbootcamp.org/    - Öresund - Innovation happens HERE.
http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.



On Fri, Jul 22, 2011 at 10:25 PM, Guillaume ALLEE
guillaume.al...@capgemini.com wrote:
 Hi Peter,

 Thanks for your answer. I knew that it was possible to put semi colons for
 line break ;-)

 To be more precise, I have the following script that was given kindly given
 by Marko on another thread.

       m = [:]
        g.idx('id')[[object_type:'A']].transform{
                if(it.out('USES'){it.object_type.equals('B')}.count()  1)
                        count = 1
                else
                        count  1
                }.groupCount(m)  -1
        m

 I know it is possible to do the same following in one line  (see below)
 however I would like, for more readability to be able to submit it to the
 REST gremlin plugin with multiple lines.

 m = [:]
 ;g.idx('id')[[object_type:'A']].transform{if(it.out('USES'){it.object_type.equals('B')}.count()
 1) count = 1 else count  1}.groupCount(m)  -1 ; m


 Guillaume in holiday tonight  ;-)

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Re: [Neo4j] How often are Spatial snapshots published?

2011-07-22 Thread Anders Nawroth
Hi!

 Are these snapshots rebuilt regularly?

Now they are, again:
http://m2.neo4j.org/snapshots/org/neo4j/neo4j-spatial/0.6-SNAPSHOT/


/anders


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Re: [Neo4j] how many relationships?

2011-07-22 Thread John cyuczieekc
How would I go about getting all relationships in the entire database ?
(with neo4j embedded)
I see there is an db.getAllNodes() for nodes
is there something similar for relationships?

On Wed, Jul 20, 2011 at 7:13 PM, cyuczi eekc cyuczie...@gmail.com wrote:

 Is there a way to get the number of relationships without having to iterate
 through (and count++) them?
 ie. rels=firstNode.getRelationships();
 rels.size(); //doesn't actually exist

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Re: [Neo4j] How often are Spatial snapshots published?

2011-07-22 Thread Peter Neubauer
Nice,
thanks Anders! And, we want to make a 0.6 release ASAP before merging
in all the new good stuff.

Cheers,

/peter neubauer

GTalk:      neubauer.peter
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http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.



On Fri, Jul 22, 2011 at 11:33 PM, Anders Nawroth
and...@neotechnology.com wrote:
 Hi!

 Are these snapshots rebuilt regularly?

 Now they are, again:
 http://m2.neo4j.org/snapshots/org/neo4j/neo4j-spatial/0.6-SNAPSHOT/


 /anders


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Re: [Neo4j] how many relationships?

2011-07-22 Thread Michael Hunger
for (Node node : db.getAllNodes()) for (Relationship rel : 
node.getRelationships(Direction.OUTGOING)) {
   // your code here
}

Michael

Am 22.07.2011 um 23:40 schrieb John cyuczieekc:

 How would I go about getting all relationships in the entire database ?
 (with neo4j embedded)
 I see there is an db.getAllNodes() for nodes
 is there something similar for relationships?
 
 On Wed, Jul 20, 2011 at 7:13 PM, cyuczi eekc cyuczie...@gmail.com wrote:
 
 Is there a way to get the number of relationships without having to iterate
 through (and count++) them?
 ie. rels=firstNode.getRelationships();
rels.size(); //doesn't actually exist
 
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Re: [Neo4j] Officially supported mechanism for J2EE

2011-07-22 Thread Alexander Smirnov
No, that's wrong. To create ( and shut down GraphDatabaseService in
your bean, you should:
1) create @Singleton session bean. In its @PostConstruct method,
create appropriate GraphDataBase service object, and stop it in
@PreDestroy method. You can mark that bean as created on startup, if
you wish to get possible database errors on deployment instead of the
first use.
2) create producer method for GraphDataBaseService :
@Produces public GraphDataBaseService getDatabase() { return db; }
3) inject GraphDataBaseService wherever you need it:
@Inject private GraphDataBaseService db;
The most tricky part is Transaction synchronization. There are two options:
- manage transactions in your code by GraphDataBaseService , if you
don't need to synchronize it with other resources.
- create custom TransactionManagerProvider that enforces Neo4j to use
TransactionManager provided by server instead of built-in. You can
grab such code from Spring Data Graph project or my Neo4j connector.
Spring implementation injects TransactionManager from framework, so
you will need at least spring core while my code gets
TransactionManager from JNDI, that works in some servers only. All
other resources participated the same transaction with Neo4j should
also use XA Transactions.

On Fri, Jul 22, 2011 at 12:02 PM, eialbur ronalb...@gmail.com wrote:
 Sorry for the quantity of my questions, and I apologize in advance if any of
 them are trivial or stupid.


 ok - so I guess that in my Session Bean I would use the regular old
 @Resource annotation:
 @Resource
 GraphDatabaseService graphDb;


 Or do I need to declare Neo to jndi and then reference it?
 @Resource(name=neo/myGraphDb)
 GraphDatabaseService graphDb;


 Do I have to update the server.xml file so graphDb knows what to open?  I am
 assuming that there is no connection pooling.  I am assuming that my Session
 Bean does not need to be a Singleton.

 Is an alternative for me to actually open in ejbCreate?
 As you stated, it is important to release everything when I'm done ... would
 that be done thru ejbRemove?


 OK - so now I'll need XA transaction support.  I have never done anything
 with XA.  I am trying to look up articles on Google for Glassfish ... so far
 I have found very little.  I'm not sure yet if Glassfish has built-in
 support for XA (I'm assuming it does) and I can just use the
 javax.transaction package, or if I have to do special app server
 configuration ... and not yet sure if/how to set it all up as a container
 managed transaction.  Can you tell I am not yet comfortable with J2EE?  :-)

 Frankly, I am evaluating the use cases to see if I ever need to share a
 transaction with the database or if they are always separate (or if I can
 design so they are always separate).  I am essentially using Neo4j as a
 hierarchic index against a mysql table ..  lots of queries but very very few
 inserts or updates.




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Re: [Neo4j] how many relationships?

2011-07-22 Thread John cyuczieekc
Though that is kind of telling me that relationships only exist in java as
wrappers for an ordered tuple of nodes. I guess I was thinking that they
were stored/accessed differently as unique objects(since they each have an
id)... maybe they are but neo4j isn't exposing a method for parsing
relationships directly, that is without going through a node first.
  The method you suggested seems like the long way to parse all
relationships. Still, I will use it nonetheless ;)

Thank you!

On Fri, Jul 22, 2011 at 11:57 PM, Michael Hunger 
michael.hun...@neotechnology.com wrote:

 for (Node node : db.getAllNodes()) for (Relationship rel :
 node.getRelationships(Direction.OUTGOING)) {
   // your code here
 }

 Michael

 Am 22.07.2011 um 23:40 schrieb John cyuczieekc:

  How would I go about getting all relationships in the entire database ?
  (with neo4j embedded)
  I see there is an db.getAllNodes() for nodes
  is there something similar for relationships?
 
  On Wed, Jul 20, 2011 at 7:13 PM, cyuczi eekc cyuczie...@gmail.com
 wrote:
 
  Is there a way to get the number of relationships without having to
 iterate
  through (and count++) them?
  ie. rels=firstNode.getRelationships();
 rels.size(); //doesn't actually exist
 
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Re: [Neo4j] OSGi and Neo4j - superbundle approach

2011-07-22 Thread Jörg Richter

I'm seriously trying the superbundle approach and can't get rid of No index 
provider 'lucene' found.

The tests at https://github.com/neo4j/neo4j-osgi run successful but I have 
serious problems to transfer them to my application (I'm using Felix 3.2.1 on a 
Mac).

Just to check my understanding: the No index provider 'lucene' found problem 
is with fine granular bundling, OSGi classloaders, and Java's service loader. 
One way to solve it is the superbundle approach: putting the user application's 
activator and all required neo and lucene bundles/libs into a single bundle. 
Correct?

So I took neo4j-osgi/bundle/pom.xml as an template for my application's pom, 
especially its bundle plugin configuration:


Import-Package!javax.transaction.*,!com.sun.*,!sun.misc.*,!org.junit.*,!junit.*,*;/Import-Package
Export-Packageorg.neo4j.*;version=1.4,*/Export-Package
Embed-Dependency*;scope=compile|runtime/Embed-Dependency
Embed-Transitivetrue/Embed-Transitive

and added my application's activator:

Bundle-Activator de.deepamehta.neo4j.Activator/Bundle-Activator 

The activator's start() method is fairly simple:

public void start(BundleContext context) {
GraphDatabaseService neo4j = new 
EmbeddedGraphDatabase(test-db);
IndexNode index = neo4j.index().forNodes(exact);
}

But it throws: java.lang.IllegalArgumentException: No index provider 'lucene' 
found

The bundle list looks fine (#1 is the super bundle):

ID|State  |Level|Name
 0|Active |0|System Bundle (3.2.1)
 1|Resolved   |5|Neo4j OSGi Test (0.1.0)
 2|Active |1|Apache Felix Gogo Command (0.8.0)
 3|Active |1|Apache Felix Gogo Runtime (0.8.0)
 4|Active |1|Apache Felix Gogo Shell (0.8.0)

To let you reproduce this I packed a minimal test project here:
https://github.com/jri/neo4j-osgi-test

Run it:
git clone git://github.com/jri/neo4j-osgi-test.git
cd neo4j-osgi-test
mvn clean install pax:run

This uses pax runner to provision the super bundle in a Felix runtime.
Deploying the super bundle manually in Felix makes no difference.

Using the latest Maven bundle plugin (2.3.5 instead of 1.4) makes no difference 
(after tweaking the pom a little) and also getting rid of the bundle plugin's 
warnings (again by tweaking the pom) makes no difference.

Who can help?

Cheers,
Jörg

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Re: [Neo4j] OSGi and Neo4j - superbundle approach

2011-07-22 Thread Peter Neubauer
Jörg,
Will try to check it out tomorrow. Now sleep. Thanks for the test!

/peter

Sent from my phone.
On Jul 23, 2011 1:10 AM, Jörg Richter j...@deepamehta.de wrote:

 I'm seriously trying the superbundle approach and can't get rid of No
index provider 'lucene' found.

 The tests at https://github.com/neo4j/neo4j-osgi run successful but I have
serious problems to transfer them to my application (I'm using Felix 3.2.1
on a Mac).

 Just to check my understanding: the No index provider 'lucene' found
problem is with fine granular bundling, OSGi classloaders, and Java's
service loader. One way to solve it is the superbundle approach: putting the
user application's activator and all required neo and lucene bundles/libs
into a single bundle. Correct?

 So I took neo4j-osgi/bundle/pom.xml as an template for my application's
pom, especially its bundle plugin configuration:


Import-Package!javax.transaction.*,!com.sun.*,!sun.misc.*,!org.junit.*,!junit.*,*;/Import-Package
 Export-Packageorg.neo4j.*;version=1.4,*/Export-Package
 Embed-Dependency*;scope=compile|runtime/Embed-Dependency
 Embed-Transitivetrue/Embed-Transitive

 and added my application's activator:

 Bundle-Activator de.deepamehta.neo4j.Activator/Bundle-Activator

 The activator's start() method is fairly simple:

 public void start(BundleContext context) {
 GraphDatabaseService neo4j = new EmbeddedGraphDatabase(test-db);
 IndexNode index = neo4j.index().forNodes(exact);
 }

 But it throws: java.lang.IllegalArgumentException: No index provider
'lucene' found

 The bundle list looks fine (#1 is the super bundle):

 ID|State |Level|Name
 0|Active | 0|System Bundle (3.2.1)
 1|Resolved | 5|Neo4j OSGi Test (0.1.0)
 2|Active | 1|Apache Felix Gogo Command (0.8.0)
 3|Active | 1|Apache Felix Gogo Runtime (0.8.0)
 4|Active | 1|Apache Felix Gogo Shell (0.8.0)

 To let you reproduce this I packed a minimal test project here:
 https://github.com/jri/neo4j-osgi-test

 Run it:
 git clone git://github.com/jri/neo4j-osgi-test.git
 cd neo4j-osgi-test
 mvn clean install pax:run

 This uses pax runner to provision the super bundle in a Felix runtime.
 Deploying the super bundle manually in Felix makes no difference.

 Using the latest Maven bundle plugin (2.3.5 instead of 1.4) makes no
difference (after tweaking the pom a little) and also getting rid of the
bundle plugin's warnings (again by tweaking the pom) makes no difference.

 Who can help?

 Cheers,
 Jörg

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Re: [Neo4j] OSGi and Neo4j - superbundle approach

2011-07-22 Thread Jörg Richter

On Jul 23, 2011, at 1:13, Peter Neubauer wrote:

 Will try to check it out tomorrow. Now sleep. Thanks for the test!

Sure.

Just one addition for tomorrow: the only neo-bundles my application need are 
kernel and lucene-index. So I did add just these 2 to the super bundle's 
dependencies instead the neo4j meta package.

Good night!
Jörg

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Re: [Neo4j] How often are Spatial snapshots published?

2011-07-22 Thread Nolan Darilek
Awesome! Thanks a bunch.

On 07/22/2011 04:33 PM, Anders Nawroth wrote:
 Hi!

 Are these snapshots rebuilt regularly?
 Now they are, again:
 http://m2.neo4j.org/snapshots/org/neo4j/neo4j-spatial/0.6-SNAPSHOT/


 /anders

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Re: [Neo4j] how many relationships?

2011-07-22 Thread Jim Webber
Hi John,

Relationships are stored in a different store than nodes. This enables Neo4j to 
manage lifecycle events (like caching) for nodes and relationships separately. 

Neo4j really is a graph DB, not a tripple store masquerading as a graph DB.

Nonetheless, that code Michael sent still works :-)

Jim
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Re: [Neo4j] how many relationships?

2011-07-22 Thread John cyuczieekc
Hey Jim,
I am sort of glad to hear that, maybe in the future I could see a method
like getAllRelationships(), or not, np :)
Yes, using Michael's code works, but ...
total relations count=100,011 timedelta=3,075,897,991 ns
it kind of takes 3 seconds (when not cached) to count 100k relationships
(considering there are 100k+2 unique nodes too)
when cached:
total relations count=100,011 timedelta=154,673,763 ns

Still, it's pretty fast, but I have to wonder if it would be faster if using
relationships directly :)

Either way, wish y'all a great day!


On Sat, Jul 23, 2011 at 3:57 AM, Jim Webber j...@neotechnology.com wrote:

 Hi John,

 Relationships are stored in a different store than nodes. This enables
 Neo4j to manage lifecycle events (like caching) for nodes and relationships
 separately.

 Neo4j really is a graph DB, not a triple store masquerading as a graph DB.

 Nonetheless, that code Michael sent still works :-)

 Jim
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[Neo4j] shortestPath slower than it could be

2011-07-22 Thread John cyuczieekc
Hey guys, me bugging you again :)

(This whole thing is kind of based on the lack of being able to get the
number of relationships a node has)

 If I have two nodes, and the first one has 1 million outgoing relationships
of the type X to 1 million unique/different nodes,
and the second node has 10 incoming relationships of type X (same type) of
which one is from the first node,
then using GraphAlgoFactory.shortestPath  (or suggest a better way?)
 How can I tell neo4j to iterate the search on the second node's incoming
rels simply because it has 10 relationships instead of 1 million, in order
to check if each relationship is in the form of firstNode--secondNode ?

For the case when first node has 100,000 relationships and second node has
10,
it takes *1.7 seconds* for shortestPath to find the only one link between
them using:

final PathFinderPath finder = GraphAlgoFactory.shortestPath(
Traversal.expanderForTypes( rel, Direction.OUTGOING  ), 1 );
final Path foundPath = finder.findSinglePath( *one, two* );

I can put Direction.*BOTH *and get the same amount of time
*Path from one to two: (one)--(two) timedelta=1,862,726,634 ns*

*BUT*, get this: if I swap the nodes:
finder.findSinglePath(* two, one*);
and i use either Direction.INCOMING or Direction.*BOTH  *(which makes sense
for the second node ,right) then I get *20ms* the time until it finishes...
*Path from one to two: (two)--(one) timedelta=20,830,111 ns*

(both cases are without data being priorly cached)

I was expecting it to act like this: (but only when using Direction.BOTH)
  see which node has the least number of relationships and iterate on those,
but this would work if findSinglePath would be made for depth 1 (aka
particular case), but as I read Tries to find a single path between startand
end nodes. then it makes sense to me why it works like it does... that is,
iterate on relationships from start node, rather than from end node... but
I'm not sure if it would *not *make sense to iterate on the end node instead
of start node, when knowing that end node has less relationships, for make
the search faster (well at least if depth is one) - I didn't look into how
neo4j actually does stuff yet :D

anyway, it's fairly clear to me that I could make a simple wrapper method to
make this kind of search faster, *IF* I had the ability to know how many
relationships each node has, so I can call findSinglePath  with the first
param being the node with the least relationship count :) But as I
understood it, it's not possible to find how many rels a node has... gimme
feat! :)) [by not possible I mean, without having to iterate thru all and
count them, which would make the use case here obsolete]

PS: clearly all the text I wrote here would benefit from being represented
by a graph, just think about all those grouping with autohiding the ie. []
and all kinds of stuff... heh
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[Neo4j] Hybrid Relational + Graph solution

2011-07-22 Thread Felipe Oliveira Carvalho
I'm creating a social network. I would like to use Neo4J to represent the
relationships between people (FOLLOWS, WENT_TO, LIKES) and other objects I
have in my network. I already started storing the users (and other objects)
in PostgreSQL tables.

Is it reasonable to use PostgreSQL to store the objects while using Neo4J to
store the relationships between these objects? I would use ids as vertex
properties and would fetch the data for each object from PostgreSQL.

One problem I see with this approach is that if I want to traverse the graph
and use the data of the objects I would have to duplicate the data and add
more properties to the vertexes.

But I also think that minimizing the use of Neo4J would make it easier for
the other developers of the team that are used to relational databases.

Do you see more problems on this approach? Does it make thinks much more
complicated?

Thanks!
Felipe
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