Re: [Neo4j] Filter by relationship Property
For the first position (at the start node), there is no relationship leading
up to it, which means that the lastRelationship() method returns null.
This is a special case that has to be dealt with.
Cheers,
Tobias
On Wed, Mar 23, 2011 at 9:05 PM, Justine Mathews justine.math...@megree.com
wrote:
Tobias,
I have used the return filter, I am getting following error when making
rest call for node traverse,
Error : The remote server returned an error: (500) Internal Server Error.
Response header status : *javax.script.ScriptException:
sun.org.mozilla.javascript.internal.EcmaError: TypeError: Cannot call method
getProperty of null (Unknown Source#1)*
please find below the syntax,
*url:* http://localhost:7474/db/data/node/80/traverse/node
*traverse:*
{order: depth first,relationships: [
{
type: Friend,
direction: all
}
],return filter: {
language: javascript,
body: position.lastRelationship().hasProperty(\customerId\);
},max depth: 1}
· *Kernel version*
Neo4j - Graph Database Kernel 1.3.M03
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Mob: +44-(0) 7795268546
http://www.justinemathews.com
http://uk.linkedin.com/in/justinemathews
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Re: [Neo4j] Data type returned by extensions in REST
Javier,
unfortunately it is not clear what you're asking for.
Is it the discoverable part of the REST API which describes parameters and
return values?
I think the parameter description is generated from the server plugin method
parameter names, types and annotation values.
This is handled by the ExtensionPointRepresentation in the server. I just
looked and it doesn't contain information about the result.
We will discuss that internally and probably add this information. By now you
are limited to documenting that in the description part.
Cheers
Michael
Am 22.03.2011 um 23:29 schrieb Javier de la Rosa:
Hi all,
I'm ending the support for extensions in the neo4j-rest-interface [1]
and it will be soon available for installing through easy_install and
pip, the Python Package Index, and probably with a new name, I don't
know yet.
But I have just find a little problem, the data type returned is not
revealed in any of params in REST interface. By example, in the
ShortestPath.shortestPath extension the dictionary of properties
received by the client is:
{u'description': u'Find the shortest path between two nodes.',
u'extends': u'node',
u'name': u'shortestPath',
u'parameters': [{u'description': u'The node to find the shortest path to.',
u'name': u'target',
u'optional': False,
u'type': u'node'},
{u'description': u'The relationship types to follow
when searching for the shortest path(s). Order is insignificant, if
omitted all types are followed.',
u'name': u'types',
u'optional': True,
u'type': u'strings'},
{u'description': u'The maximum path length to
search for, default value (if omitted) is 4.',
u'name': u'depth',
u'optional': True,
u'type': u'integer'}]}
That's enough to clean and send the parameters to the extension using
the REST interface, but doesn't for creating the returned objects
automatically. Adding a new returns in the properties returned
should work, but maybe setting some conventions about the types
returned and sent would be a good idea. Actually the type strings is
really a list of strings, a bit confusing.
Until now, the only way to discover the type of returned objects was
to inspect the self attribute of the first element, but that doesn't
work in all the cases.
Regards!
--
Javier de la Rosa
http://versae.es
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[Neo4j] neo4j-spatial pulled from neo4j maven repo?
Hi, is it true that the current neo4j-spatial jarfiles are not available on http://m2.neo4j.org/org/neo4j/neo4j-spatial/ anymore? I cannot find it at http://m2.neo4j.org/snapshots/org/neo4j/ either. On https://repo.neo4j.org/ I only find 0.1-SNAPSHOT. https://repo.neo4j.org/content/repositories/snapshots/org/neo4j/neo4j-spatial/0.5-SNAPSHOT/neo4j-spatial-0.5-SNAPSHOT.jar Where is the correct maven repo? Greetings Axel ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] buggy webadmin
Anton,
we are thinking of adding more property types to Neo4j after 1.3,
among them a structured document one that would be exactly this.
Until then, you can of course either just have properties for each of
the map entries, or escape the whole JSON map and store it as a String
property. Would any of this work for you?
/peter
On Tue, Mar 22, 2011 at 9:27 PM, Anton Kulaga antonkul...@gmail.com wrote:
Sorry for the delay in answer. Yes, {firstkey:Val,
secondkey:Val2} happened to be valid json-s but I got Maps are
not supported property values error. I wonder how soon maps support
will be added?
2011/3/14 Peter Neubauer peter.neuba...@neotechnology.com:
Anton,
just wanted to check if things did work out for you?
Cheers,
/peter neubauer
GTalk: neubauer.peter
Skype peter.neubauer
Phone +46 704 106975
LinkedIn http://www.linkedin.com/in/neubauer
Twitter http://twitter.com/peterneubauer
http://www.neo4j.org - Your high performance graph database.
http://startupbootcamp.org/ - Öresund - Innovation happens HERE.
http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.
On Sat, Mar 12, 2011 at 11:22 PM, Michael Hunger
michael.hun...@neotechnology.com wrote:
Regarding the second fact:
{firstkey:Val, secondkey:Val2} is no valid JSON, you always have to
quote strings.
i.e. {firstkey:Val, secondkey:Val2}
Cheers
Michael
Am 12.03.2011 um 21:49 schrieb Anton Kulaga:
Hello, I stumbled upon few bugs in neo4j webadmin.
When I create a relationship between any two nodes in neo4j webadmin I
get error that node 'id of the first node' cannot be found event if
both nodes DO EXIST. Creations of new nodes works fine although
webinterface for unknown reasons does not recognise things like
{firstkey:Val, secondkey:Val2} as valid JSON values; My OS is
WIndows 2008 Server RC2, Java version is 6, Browser: Chrome 10
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Re: [Neo4j] neo4j-spatial pulled from neo4j maven repo?
Hi! Lots of files in the repo got moved yesterday while some work was done there. I'll try to bring them back ASAP. /anders On 03/24/2011 10:18 AM, Axel Morgner wrote: Hi, is it true that the current neo4j-spatial jarfiles are not available on http://m2.neo4j.org/org/neo4j/neo4j-spatial/ anymore? I cannot find it at http://m2.neo4j.org/snapshots/org/neo4j/ either. On https://repo.neo4j.org/ I only find 0.1-SNAPSHOT. https://repo.neo4j.org/content/repositories/snapshots/org/neo4j/neo4j-spatial/0.5-SNAPSHOT/neo4j-spatial-0.5-SNAPSHOT.jar Where is the correct maven repo? Greetings Axel ___ 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-spatial pulled from neo4j maven repo?
Hi! The neo4j-spatial snapshots are now back. /anders On 03/24/2011 10:18 AM, Axel Morgner wrote: Hi, is it true that the current neo4j-spatial jarfiles are not available on http://m2.neo4j.org/org/neo4j/neo4j-spatial/ anymore? I cannot find it at http://m2.neo4j.org/snapshots/org/neo4j/ either. On https://repo.neo4j.org/ I only find 0.1-SNAPSHOT. https://repo.neo4j.org/content/repositories/snapshots/org/neo4j/neo4j-spatial/0.5-SNAPSHOT/neo4j-spatial-0.5-SNAPSHOT.jar Where is the correct maven repo? Greetings Axel ___ 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-spatial pulled from neo4j maven repo?
Yes, thanks a lot!! Am 24.03.2011 10:42, schrieb Anders Nawroth: Hi! The neo4j-spatial snapshots are now back. /anders On 03/24/2011 10:18 AM, Axel Morgner wrote: Hi, is it true that the current neo4j-spatial jarfiles are not available on http://m2.neo4j.org/org/neo4j/neo4j-spatial/ anymore? I cannot find it at http://m2.neo4j.org/snapshots/org/neo4j/ either. On https://repo.neo4j.org/ I only find 0.1-SNAPSHOT. https://repo.neo4j.org/content/repositories/snapshots/org/neo4j/neo4j-spatial/0.5-SNAPSHOT/neo4j-spatial-0.5-SNAPSHOT.jar Where is the correct maven repo? Greetings Axel ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] Neo4J High Availability : embedded or server mode ?
Hi, I'm new to Neo4J and I'm a little bit confused (maybe totally lost...) about the use of the Neo4J server against an embedded database in high availability mode... I need a database with high availability, replication and high concurrency management accessed as a remote server. If I have well understood, Neo4J server only give an access to the database through a REST API, which didn't implement all of the capabilities of the embedded database with full Java access. Neo4J server obviously could be run in high availability mode. BUT embedded database should to ! But for me, the principle of clustering and replication is inherent to a server mode ! So, if I make an embedded database in HA mode, I'll have a database that can be used like a remote server but with full Java access (with HighlyAvailableGraphDatabase class) ? So what's the advantage of using Neo4J server anymore ? :/ Sorry if I didn't understand anything but after some days of reading and reading again all the documentation and wiki pages, I don't know what to do... Thanks for explanations ! Kiiv PS : sorry if my english is not very understandable, I can try to explain things differently if needed ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4J High Availability : embedded or server mode ?
Hi Kiiv, Both the embedded database *and* the server database can run in HA mode. We tend to think of the server as simply a wrapper around the database that provides a RESTful API to augment the local API. So go right ahead and pick the configuration that's right for you, and you'll be able to use HA whatever configuration you decide. Jim ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] neo4j-spatial pulled from neo4j maven repo?
Hi Axel, We had a brief outtage of the m2.neo4j.org snapshot repository. It should all be back up again. Apologies, Andreas On Mar 24, 2011, at 10:18 AM, Axel Morgner wrote: Hi, is it true that the current neo4j-spatial jarfiles are not available on http://m2.neo4j.org/org/neo4j/neo4j-spatial/ anymore? I cannot find it at http://m2.neo4j.org/snapshots/org/neo4j/ either. On https://repo.neo4j.org/ I only find 0.1-SNAPSHOT. https://repo.neo4j.org/content/repositories/snapshots/org/neo4j/neo4j-spatial/0.5-SNAPSHOT/neo4j-spatial-0.5-SNAPSHOT.jar Where is the correct maven repo? Greetings Axel ___ 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] Neo4J Spatial - issue with bounding box indices in OSM Layer.
Hi, I've been playing with Neo4j Spatial and the OSM data imports to
see how it all fits together. I've been blogging on my experiences
(http://bbboblog.blogspot.com).
It's still early days but think that I have run into an issue. Having
imported the OSM data successfully I've tried to execute this code to
determine whether the centre of the town of Aylesbury (UK) is within
the county of Buckinghamshire (which it is) and to pull back all nodes
which contain the centre of the town:
final OSMLayer osmLayer = (OSMLayer)spatialDB.getLayer(OSM-BUCKS);
final GeometryFactory factory = osmLayer.getGeometryFactory();
final Point point = factory.createPoint(new
Coordinate(51.796726,-0.812988));
SearchContain searchContain = new SearchContain(point);
osmLayer.getIndex().executeSearch(searchContain);
for(SpatialDatabaseRecord record: searchContain.getResults()){
System.out.println(Container: + record);
}
The layer does contain the appropriate data imported from a .osm file
extract for Buckinghamshire (the smallest file for an English county).
When I've tried to run it I've got no results and when I've debugged
it appears that the bbox property attributes (minx, maxx, miny, maxy)
for the layer's root node are incorrect (mixed up) - minx=-1.1907455,
maxx = 51.0852483, miny=0.3909055, maxy=52.2274931 causing the search
to return immediately. Am I using this API correctly and have I
stumbled into a genuine bug?
Thank you,
Robert Boothby.
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Re: [Neo4j] Neo4J High Availability : embedded or server mode ?
Hi Jim, thanks for your answer. So the Neo4J server and REST API are principaly interesting for non supported langages but with Java you confirm that the embedded database in high availability mode act like a standalone server. Nice ;) Kiiv 2011/3/24 Jim Webber j...@neotechnology.com Hi Kiiv, Both the embedded database *and* the server database can run in HA mode. We tend to think of the server as simply a wrapper around the database that provides a RESTful API to augment the local API. So go right ahead and pick the configuration that's right for you, and you'll be able to use HA whatever configuration you decide. Jim ___ 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] Cron job inside embedded neo4j
Folks, I was wondering if there's a way to simulate the notion of a cron job inside embedded neo4j, I nerd to have a way to periodically update a certain property of each and every node in my graph by calling into a remote service . Regards Sent from my iPhone ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Cron job inside embedded neo4j
Hi Saikat, The embedded graph database does not have such a facility. You'd have to manage a timer thread yourself or use perhaps Quartz[1] for sophisticated job scheduling. Cheers, Andreas [1] http://www.quartz-scheduler.org/ On Mar 24, 2011, at 3:08 PM, Saikat Kanjilal wrote: Folks, I was wondering if there's a way to simulate the notion of a cron job inside embedded neo4j, I nerd to have a way to periodically update a certain property of each and every node in my graph by calling into a remote service . Regards Sent from my iPhone ___ 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] Data type returned by extensions in REST
On Thu, Mar 24, 2011 at 04:58, Michael Hunger
michael.hun...@neotechnology.com wrote:
unfortunately it is not clear what you're asking for.
Sorry about that. The only thing I want in the REST component is a way
to identify the data type of the value returned by an extension.
Is it the discoverable part of the REST API which describes parameters and
return values?
I think the parameter description is generated from the server plugin method
parameter names, types and annotation values.
Exactly, but there's no annotations for describing the data type
returned. I would like to have this information in order to create the
suitable object in Python, not only a dictionary containing the
values.
This is handled by the ExtensionPointRepresentation in the server. I just
looked and it doesn't contain information about the result.
We will discuss that internally and probably add this information. By now you
are limited to documenting that in the description part.
OK, I see. Are you planning to add this feature in some moment in the
near future?
Best regards.
Cheers
Michael
Am 22.03.2011 um 23:29 schrieb Javier de la Rosa:
Hi all,
I'm ending the support for extensions in the neo4j-rest-interface [1]
and it will be soon available for installing through easy_install and
pip, the Python Package Index, and probably with a new name, I don't
know yet.
But I have just find a little problem, the data type returned is not
revealed in any of params in REST interface. By example, in the
ShortestPath.shortestPath extension the dictionary of properties
received by the client is:
{u'description': u'Find the shortest path between two nodes.',
u'extends': u'node',
u'name': u'shortestPath',
u'parameters': [{u'description': u'The node to find the shortest path to.',
u'name': u'target',
u'optional': False,
u'type': u'node'},
{u'description': u'The relationship types to follow
when searching for the shortest path(s). Order is insignificant, if
omitted all types are followed.',
u'name': u'types',
u'optional': True,
u'type': u'strings'},
{u'description': u'The maximum path length to
search for, default value (if omitted) is 4.',
u'name': u'depth',
u'optional': True,
u'type': u'integer'}]}
That's enough to clean and send the parameters to the extension using
the REST interface, but doesn't for creating the returned objects
automatically. Adding a new returns in the properties returned
should work, but maybe setting some conventions about the types
returned and sent would be a good idea. Actually the type strings is
really a list of strings, a bit confusing.
Until now, the only way to discover the type of returned objects was
to inspect the self attribute of the first element, but that doesn't
work in all the cases.
Regards!
--
Javier de la Rosa
http://versae.es
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Re: [Neo4j] Cron job inside embedded neo4j
Hit there, there is a nice write-up at http://onjava.com/pub/a/onjava/2005/09/28/what-is-quartz.html?page=1 on quartz. I have used Quartz before - it's VERY convenient, and does handle threads etc nicely. I am not certain what use a wrapper or utility would provide in itself since Quartz already is nicely packaged. However, I think think of something connected to a utility that does some specific work like imports data etc? 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, Mar 24, 2011 at 3:48 PM, Saikat Kanjilal sxk1...@hotmail.com wrote: This seems like a useful little utility to have inside an embedded db, any thoughts on creating a utility like this using a background thread and management thread for the future. Sent from my iPhone On Mar 24, 2011, at 7:12 AM, Andreas Kollegger andreas.kolleg...@neotechnology.com wrote: Hi Saikat, The embedded graph database does not have such a facility. You'd have to manage a timer thread yourself or use perhaps Quartz[1] for sophisticated job scheduling. Cheers, Andreas [1] http://www.quartz-scheduler.org/ On Mar 24, 2011, at 3:08 PM, Saikat Kanjilal wrote: Folks, I was wondering if there's a way to simulate the notion of a cron job inside embedded neo4j, I nerd to have a way to periodically update a certain property of each and every node in my graph by calling into a remote service . Regards Sent from my iPhone ___ 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] Neo4J Spatial - issue with bounding box indices in OSM Layer.
Hi Robert,
Interesting work you're doing. I just read your blogs and I think it would
be great to discuss your tests in more detail. Michael Hunger has done some
interesting tests on the scalability of the OSM import, and could probably
give suggestions on configuring the import.
Looking at your code below, I think you have swapped the x and y around in
the Coordinate constructor. It should be Coordinate(x,y), but the values you
have passed look like lat,long (which means y,x).
Also, the SearchContain should return geometries that contain the point you
passed, so if your point is within a lake, or building, or some other
polygon geometry, you should get results, but I do not think it will return
anything if you point is not actually contained within closed polygons. To
give a more complete answer, I think I would need to run and test your code.
Hopefully the above comments help resolve the issue.
Regards, Craig
On Thu, Mar 24, 2011 at 12:42 PM, Robert Boothby rob...@presynt.com wrote:
Hi, I've been playing with Neo4j Spatial and the OSM data imports to
see how it all fits together. I've been blogging on my experiences
(http://bbboblog.blogspot.com).
It's still early days but think that I have run into an issue. Having
imported the OSM data successfully I've tried to execute this code to
determine whether the centre of the town of Aylesbury (UK) is within
the county of Buckinghamshire (which it is) and to pull back all nodes
which contain the centre of the town:
final OSMLayer osmLayer = (OSMLayer)spatialDB.getLayer(OSM-BUCKS);
final GeometryFactory factory = osmLayer.getGeometryFactory();
final Point point = factory.createPoint(new
Coordinate(51.796726,-0.812988));
SearchContain searchContain = new SearchContain(point);
osmLayer.getIndex().executeSearch(searchContain);
for(SpatialDatabaseRecord record: searchContain.getResults()){
System.out.println(Container: + record);
}
The layer does contain the appropriate data imported from a .osm file
extract for Buckinghamshire (the smallest file for an English county).
When I've tried to run it I've got no results and when I've debugged
it appears that the bbox property attributes (minx, maxx, miny, maxy)
for the layer's root node are incorrect (mixed up) - minx=-1.1907455,
maxx = 51.0852483, miny=0.3909055, maxy=52.2274931 causing the search
to return immediately. Am I using this API correctly and have I
stumbled into a genuine bug?
Thank you,
Robert Boothby.
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Re: [Neo4j] Cron job inside embedded neo4j
Yes to be clear what I need is some hook in neo4j connected to a utility that does update of global data using quartz, in my case I would need this to update a specific property of all nodes. Date: Thu, 24 Mar 2011 15:56:37 +0100 From: peter.neuba...@neotechnology.com To: user@lists.neo4j.org Subject: Re: [Neo4j] Cron job inside embedded neo4j Hit there, there is a nice write-up at http://onjava.com/pub/a/onjava/2005/09/28/what-is-quartz.html?page=1 on quartz. I have used Quartz before - it's VERY convenient, and does handle threads etc nicely. I am not certain what use a wrapper or utility would provide in itself since Quartz already is nicely packaged. However, I think think of something connected to a utility that does some specific work like imports data etc? 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, Mar 24, 2011 at 3:48 PM, Saikat Kanjilal sxk1...@hotmail.com wrote: This seems like a useful little utility to have inside an embedded db, any thoughts on creating a utility like this using a background thread and management thread for the future. Sent from my iPhone On Mar 24, 2011, at 7:12 AM, Andreas Kollegger andreas.kolleg...@neotechnology.com wrote: Hi Saikat, The embedded graph database does not have such a facility. You'd have to manage a timer thread yourself or use perhaps Quartz[1] for sophisticated job scheduling. Cheers, Andreas [1] http://www.quartz-scheduler.org/ On Mar 24, 2011, at 3:08 PM, Saikat Kanjilal wrote: Folks, I was wondering if there's a way to simulate the notion of a cron job inside embedded neo4j, I nerd to have a way to periodically update a certain property of each and every node in my graph by calling into a remote service . Regards Sent from my iPhone ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4J Spatial - issue with bounding box indices in OSM Layer.
Thanks for the response Craig. You're right I had mixed up the latitude and longitude coordinates. I've now got the expected answers... However the transposition of the elements of the spatial index's root node geometry envelope definitely occurs. I just wouldn't have spotted it if I hadn't mixed up the coordinates and debugged it. The envelopes of the result nodes do not have transposed elements. The index root node element bounding box envelope looks like: Env[-1.1907455 : 51.0852483, 0.3909055 : 52.2274931], my point envelope looks like Env[-0.812988 : -0.812988, 51.796726 : 51.796726] and the other node envelopes looks like Env[-0.8577898 : -0.7723875, 51.7930991 : 51.8378447], Env[-0.8502576 : -0.8028032, 51.786247 : 51.8211053], Env[-0.8516907 : -0.7686481, 51.7932282 : 51.8335107],Env[-0.8574819 : -0.7733667, 51.7921887 : 51.8394132],Env[-0.9067499 : -0.6564949, 51.6661276 : 51.9251302], Env[-0.8159025 : -0.8114534, 51.7961756 : 51.7997272], . It appears that the maxx and miny values have been swapped in the spatial index root node. There may be certain scenarios when valid coordinates are excluded because the spatial index root node has the incorrect envelope. Robert. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] A picture worth a 170'000 nodes and 650'000 edges
For fun: This is a visualization of the graph resulting from a simulation (interacting energy markets). http://test.eeni.tbm.tudelft.nl/~alfredas/d13n-graph.png After 10 simulation ticks we have ~170'000 entities (agents, markets, power plants, bids, substances, technologies, etc) and ~650'000 relations between these entities. Different colors represent different types of relations. These relations are created at a rate of ~60'000 per tick, as a result of agents trading, investing and energy flows. By the end of the simulation we get ~1m nodes and ~4m edges. The visualization was made using neo-graphviz: https://svn.neo4j.org/laboratory/components/neo-graphviz/ The crazy part is that we can still make sense of what's happening there, using a few pipes and traversals :-) Alfredas ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] Adding Nodes, transactions and such...
Hi All, When I load data via an EmbeddedGraphDatabase - I need to stop the server, load the nodes and then restart the server. Is there a way to load the server while it is active? Are there ways to do intermittent transaction commits? I was thinking to call transaction.finish and then get a new transaction after x number of records processed? ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Adding Nodes, transactions and such...
Hi, Is this of help? http://wiki.neo4j.org/content/Transactions#Big_transactions David On Thu, Mar 24, 2011 at 12:11 PM, jisenhart jisenh...@yoholla.com wrote: Hi All, When I load data via an EmbeddedGraphDatabase - I need to stop the server, load the nodes and then restart the server. Is there a way to load the server while it is active? Are there ways to do intermittent transaction commits? I was thinking to call transaction.finish and then get a new transaction after x number of records processed? ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- David Montag david.mon...@neotechnology.com Neo Technology, www.neotechnology.com Cell: 650.556.4411 Skype: ddmontag ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Adding Nodes, transactions and such...
only one jvm can access a graphdb at a time you could write a server plugin or extension for loading the data those share the db with the other server modules for intermittent commits just use a counter to commit and restart transactions after xx inserts Michael Sent from my iBrick4 Am 24.03.2011 um 20:11 schrieb jisenhart jisenh...@yoholla.com: Hi All, When I load data via an EmbeddedGraphDatabase - I need to stop the server, load the nodes and then restart the server. Is there a way to load the server while it is active? Are there ways to do intermittent transaction commits? I was thinking to call transaction.finish and then get a new transaction after x number of records processed? ___ 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] Cron job inside embedded neo4j
What kind of property is that? Is it the same on all nodes? So perhaps you can abstract that and just put it on one node and have the others linked to that? Could you please elaborate on your domain? Thanks Michael Am 24.03.2011 um 18:19 schrieb Saikat Kanjilal: Yes to be clear what I need is some hook in neo4j connected to a utility that does update of global data using quartz, in my case I would need this to update a specific property of all nodes. Date: Thu, 24 Mar 2011 15:56:37 +0100 From: peter.neuba...@neotechnology.com To: user@lists.neo4j.org Subject: Re: [Neo4j] Cron job inside embedded neo4j Hit there, there is a nice write-up at http://onjava.com/pub/a/onjava/2005/09/28/what-is-quartz.html?page=1 on quartz. I have used Quartz before - it's VERY convenient, and does handle threads etc nicely. I am not certain what use a wrapper or utility would provide in itself since Quartz already is nicely packaged. However, I think think of something connected to a utility that does some specific work like imports data etc? 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, Mar 24, 2011 at 3:48 PM, Saikat Kanjilal sxk1...@hotmail.com wrote: This seems like a useful little utility to have inside an embedded db, any thoughts on creating a utility like this using a background thread and management thread for the future. Sent from my iPhone On Mar 24, 2011, at 7:12 AM, Andreas Kollegger andreas.kolleg...@neotechnology.com wrote: Hi Saikat, The embedded graph database does not have such a facility. You'd have to manage a timer thread yourself or use perhaps Quartz[1] for sophisticated job scheduling. Cheers, Andreas [1] http://www.quartz-scheduler.org/ On Mar 24, 2011, at 3:08 PM, Saikat Kanjilal wrote: Folks, I was wondering if there's a way to simulate the notion of a cron job inside embedded neo4j, I nerd to have a way to periodically update a certain property of each and every node in my graph by calling into a remote service . Regards Sent from my iPhone ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j 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] A picture worth a 170'000 nodes and 650'000 edges
Wow! That is some wicked impressive visualization! Well done! Also, there will be a GeekOut in Tallin, Estonia, http://twitter.com/#!/GeekOut_ee Maybe we could meet up there and have some Graph-fun and you show off this stuff to the geeks? 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, Mar 24, 2011 at 8:09 PM, Alfredas Chmieliauskas al.fre...@gmail.com wrote: For fun: This is a visualization of the graph resulting from a simulation (interacting energy markets). http://test.eeni.tbm.tudelft.nl/~alfredas/d13n-graph.png After 10 simulation ticks we have ~170'000 entities (agents, markets, power plants, bids, substances, technologies, etc) and ~650'000 relations between these entities. Different colors represent different types of relations. These relations are created at a rate of ~60'000 per tick, as a result of agents trading, investing and energy flows. By the end of the simulation we get ~1m nodes and ~4m edges. The visualization was made using neo-graphviz: https://svn.neo4j.org/laboratory/components/neo-graphviz/ The crazy part is that we can still make sense of what's happening there, using a few pipes and traversals :-) Alfredas ___ 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] A picture worth a 170'000 nodes and 650'000 edges
But Alfredas is in the Netherlands, right, in Delft? Btw. they used Spring Data Graph successfully for their project, I already got some great feedback. Thanks for that Cheers Michael Am 24.03.2011 um 21:06 schrieb Peter Neubauer: Wow! That is some wicked impressive visualization! Well done! Also, there will be a GeekOut in Tallin, Estonia, http://twitter.com/#!/GeekOut_ee Maybe we could meet up there and have some Graph-fun and you show off this stuff to the geeks? 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, Mar 24, 2011 at 8:09 PM, Alfredas Chmieliauskas al.fre...@gmail.com wrote: For fun: This is a visualization of the graph resulting from a simulation (interacting energy markets). http://test.eeni.tbm.tudelft.nl/~alfredas/d13n-graph.png After 10 simulation ticks we have ~170'000 entities (agents, markets, power plants, bids, substances, technologies, etc) and ~650'000 relations between these entities. Different colors represent different types of relations. These relations are created at a rate of ~60'000 per tick, as a result of agents trading, investing and energy flows. By the end of the simulation we get ~1m nodes and ~4m edges. The visualization was made using neo-graphviz: https://svn.neo4j.org/laboratory/components/neo-graphviz/ The crazy part is that we can still make sense of what's happening there, using a few pipes and traversals :-) Alfredas ___ 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] Adding Nodes, transactions and such...
Thanks! On Thu, 24 Mar 2011 20:29:01 +0100, Michael Hunger michael.hun...@neotechnology.com wrote: only one jvm can access a graphdb at a time you could write a server plugin or extension for loading the data those share the db with the other server modules for intermittent commits just use a counter to commit and restart transactions after xx inserts Michael Sent from my iBrick4 Am 24.03.2011 um 20:11 schrieb jisenhart jisenh...@yoholla.com: Hi All, When I load data via an EmbeddedGraphDatabase - I need to stop the server, load the nodes and then restart the server. Is there a way to load the server while it is active? Are there ways to do intermittent transaction commits? I was thinking to call transaction.finish and then get a new transaction after x number of records processed? ___ 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] Read property file from a plugin
Is there a way to determine the path to the conf directory from within a plugin? ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] A picture worth a 170'000 nodes and 650'000 edges
Estonia is nice. But unfortunately I'm in Delft, NL most of the time. It would be great though to meet somewhere in the middle at some point, maybe Cph? Alfredas On Thu, Mar 24, 2011 at 9:20 PM, Michael Hunger michael.hun...@neotechnology.com wrote: But Alfredas is in the Netherlands, right, in Delft? Btw. they used Spring Data Graph successfully for their project, I already got some great feedback. Thanks for that Cheers Michael Am 24.03.2011 um 21:06 schrieb Peter Neubauer: Wow! That is some wicked impressive visualization! Well done! Also, there will be a GeekOut in Tallin, Estonia, http://twitter.com/#!/GeekOut_ee Maybe we could meet up there and have some Graph-fun and you show off this stuff to the geeks? 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, Mar 24, 2011 at 8:09 PM, Alfredas Chmieliauskas al.fre...@gmail.com wrote: For fun: This is a visualization of the graph resulting from a simulation (interacting energy markets). http://test.eeni.tbm.tudelft.nl/~alfredas/d13n-graph.png After 10 simulation ticks we have ~170'000 entities (agents, markets, power plants, bids, substances, technologies, etc) and ~650'000 relations between these entities. Different colors represent different types of relations. These relations are created at a rate of ~60'000 per tick, as a result of agents trading, investing and energy flows. By the end of the simulation we get ~1m nodes and ~4m edges. The visualization was made using neo-graphviz: https://svn.neo4j.org/laboratory/components/neo-graphviz/ The crazy part is that we can still make sense of what's happening there, using a few pipes and traversals :-) Alfredas ___ 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] A picture worth a 170'000 nodes and 650'000 edges
Nice to see my visualization code being put to good use. The most recent version has moved to github, along with the rest of Neo4j, since this is an unofficial tool it is on my personal github: https://github.com/thobe/neoviz Cheers, Tobias On Thu, Mar 24, 2011 at 8:09 PM, Alfredas Chmieliauskas al.fre...@gmail.com wrote: For fun: This is a visualization of the graph resulting from a simulation (interacting energy markets). http://test.eeni.tbm.tudelft.nl/~alfredas/d13n-graph.png After 10 simulation ticks we have ~170'000 entities (agents, markets, power plants, bids, substances, technologies, etc) and ~650'000 relations between these entities. Different colors represent different types of relations. These relations are created at a rate of ~60'000 per tick, as a result of agents trading, investing and energy flows. By the end of the simulation we get ~1m nodes and ~4m edges. The visualization was made using neo-graphviz: https://svn.neo4j.org/laboratory/components/neo-graphviz/ The crazy part is that we can still make sense of what's happening there, using a few pipes and traversals :-) Alfredas ___ 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 1.3 Abisko Lampa M05 - Preparing for arrival
Hello everyone, Another milestone has arrived, bringing a new webadmin UI, extended server extensions and improvements on the Windows side of things. For a thorough description of the changes present, as always, refer to the official blog post, available at: http://blog.neo4j.org/ A new interface awaits the users of the Web Administration Console for the Server component. The classic tabular view is present alongside a new visualization engine that makes navigation of the graph data easier. Also, appealing to your inner geek, keyboard shortcuts make their first appearance, where you can now press “s” from any page and have the data browser bar immediately available. For the Windows users out there, you will be relieved to know that this milestone levels out any differences between your platform and what Mac and Linux users have been enjoying so far. The full backup feature now works flawlessly, courtesy of a custom locking mechanism and a filesystem abstraction that enables backup operations and the High Availability component to operate as smoothly and as fast on Windows as on the rest of the supported platforms. As always, there is a host of bug fixes and less notable improvements scattered throughout the various components, many of which are a direct result of the feedback this community provides. Only one week remains until the GA release of 1.3 “Abisko Lampa” and we are hard at work trying to make this the best release so far. Until then, keep those ideas coming people! Cheers, Andreas ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4J Spatial - issue with bounding box indices in OSM Layer.
I will need to double check this. I know there was a dispute early on with Neo4j Spatial because the JTS library orders bbox params in one way, and GeoTools does it another way, so you might be seeing the results of that. I believed we sorted that all out, but perhaps not. I have have just checked the RTree code, and it does the right thing, however it is possible that code outside is passing in bbox parameters in a different order than expected. Perhaps you have some sample test code I can use to check this with? On Thu, Mar 24, 2011 at 7:01 PM, Robert Boothby rob...@presynt.com wrote: Thanks for the response Craig. You're right I had mixed up the latitude and longitude coordinates. I've now got the expected answers... However the transposition of the elements of the spatial index's root node geometry envelope definitely occurs. I just wouldn't have spotted it if I hadn't mixed up the coordinates and debugged it. The envelopes of the result nodes do not have transposed elements. The index root node element bounding box envelope looks like: Env[-1.1907455 : 51.0852483, 0.3909055 : 52.2274931], my point envelope looks like Env[-0.812988 : -0.812988, 51.796726 : 51.796726] and the other node envelopes looks like Env[-0.8577898 : -0.7723875, 51.7930991 : 51.8378447], Env[-0.8502576 : -0.8028032, 51.786247 : 51.8211053], Env[-0.8516907 : -0.7686481, 51.7932282 : 51.8335107],Env[-0.8574819 : -0.7733667, 51.7921887 : 51.8394132],Env[-0.9067499 : -0.6564949, 51.6661276 : 51.9251302], Env[-0.8159025 : -0.8114534, 51.7961756 : 51.7997272], . It appears that the maxx and miny values have been swapped in the spatial index root node. There may be certain scenarios when valid coordinates are excluded because the spatial index root node has the incorrect envelope. Robert. ___ 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] A picture worth a 170'000 nodes and 650'000 edges
Nice visualization! How long did it take to render this image? By the way, we are going to hire a student through Google Summer of Code to use Cytoscape 3 as a visualizer for Neo4j. If any of you are a student and interested in this type of coding project, please apply: http://chihuahua.ucsf.edu/cgi-bin/wikigsoc.pl(Idea #4) Thanks, Kei Cytoscape Core Developer: http://cytoscape.org/ 2011/3/24 Tobias Ivarsson tobias.ivars...@neotechnology.com: Nice to see my visualization code being put to good use. The most recent version has moved to github, along with the rest of Neo4j, since this is an unofficial tool it is on my personal github: https://github.com/thobe/neoviz Cheers, Tobias On Thu, Mar 24, 2011 at 8:09 PM, Alfredas Chmieliauskas al.fre...@gmail.com wrote: For fun: This is a visualization of the graph resulting from a simulation (interacting energy markets). http://test.eeni.tbm.tudelft.nl/~alfredas/d13n-graph.png After 10 simulation ticks we have ~170'000 entities (agents, markets, power plants, bids, substances, technologies, etc) and ~650'000 relations between these entities. Different colors represent different types of relations. These relations are created at a rate of ~60'000 per tick, as a result of agents trading, investing and energy flows. By the end of the simulation we get ~1m nodes and ~4m edges. The visualization was made using neo-graphviz: https://svn.neo4j.org/laboratory/components/neo-graphviz/ The crazy part is that we can still make sense of what's happening there, using a few pipes and traversals :-) Alfredas ___ 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 -- Keiichiro Ono http://www.keiono.net/ ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] General question: relationships vs indexes
Easy question (I hope): For a simple, one key index, is it better (more performant on write and query) to use the indexing framework or to create your own index using relationships? Thanks, Rick ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] General question: relationships vs indexes
Oh, and one related question: With the index framework, is there a way to limit the # of items returned from a query? I could potentially have millions of values, but am only interested in the top or bottom 100 (based on sort order). -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Rick Bullotta Sent: Thursday, March 24, 2011 9:00 PM To: Neo4j user discussions Subject: [Neo4j] General question: relationships vs indexes Easy question (I hope): For a simple, one key index, is it better (more performant on write and query) to use the indexing framework or to create your own index using relationships? Thanks, Rick ___ 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] LuceneTimeline in 1.3
Hi, Mattias. This looks like it is almost exactly what I need for one of our use cases, but I can't find any examples/documentation on its usage. Can you point me to an example of creating/adding/querying using these index? Cheers, Rick ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] General question: relationships vs indexes
Answering (part of) my own question, I found top(n) in QueryContext. Anyone have an example of its proper usage? -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Rick Bullotta Sent: Thursday, March 24, 2011 9:01 PM To: Neo4j user discussions Subject: Re: [Neo4j] General question: relationships vs indexes Oh, and one related question: With the index framework, is there a way to limit the # of items returned from a query? I could potentially have millions of values, but am only interested in the top or bottom 100 (based on sort order). -Original Message- From: user-boun...@lists.neo4j.org [mailto:user-boun...@lists.neo4j.org] On Behalf Of Rick Bullotta Sent: Thursday, March 24, 2011 9:00 PM To: Neo4j user discussions Subject: [Neo4j] General question: relationships vs indexes Easy question (I hope): For a simple, one key index, is it better (more performant on write and query) to use the indexing framework or to create your own index using relationships? Thanks, Rick ___ 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] the Problem about the real-time of index
Hi,all I am confused at the index real-time, If I make an index, and add some nodes in , when I can used the index and find the node ? if it's real-time , It will cause some CPU and calculate ? It is worth for me to use real-time ? how can config that ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4J High Availability : embedded or server mode ?
Though I don't see a reason not to support it, but I did not understand the point of HA in a embedded mode. Would be interested in hearing couple of examples of what that would be... Embedded would mean - same VM - so replication and concurrency - do they really mean much here ? Also, that brings me to another question - is the Embedded version of Neo4j concurrent for multiple threads ? Meaning can it have multiple simultaneous connections/transactions ongoing ? Thanks Guru On Thu, Mar 24, 2011 at 4:27 PM, Jim Webber j...@neotechnology.com wrote: Hi Kiiv, Both the embedded database *and* the server database can run in HA mode. We tend to think of the server as simply a wrapper around the database that provides a RESTful API to augment the local API. So go right ahead and pick the configuration that's right for you, and you'll be able to use HA whatever configuration you decide. Jim ___ 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
