Dear Graphistas,
I'd like to inform you that we released the M2 milestone of Spring Data Graph
1.1.0.
The most obvious change is repackaging, sorry for that but the Spring Data
project decided to move all packages to
org.springsource.data.datastore so ours will be
org.springsource.data.neo4j
Thanks for replies!
Yes, the super bundle approach (putting *all* neo modules and *all* their
dependencies in one bundle) works in principle. But to be a deployable solution
...
1) it must exist in the Maven repo and be on a par with the Neo4j release
2) A configuration mechanism is required
Neo4jists,
Was my question dumb or was it really not clear ?
Cheers
--
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Hello devs,
First i refer for my problem to this previous message on neo4j list (
http://lists.neo4j.org/pipermail/user/2011-July/010158.html)
because i have the same issue/error with geoserver and neo4j-spatial plugin
:/
*
Error creating data store, check the parameters. Error message: Could not
Hi!
I've been trying to fix this error, and I've kind of succeeded.
My context is, that I've pulled neo4j sources from github and using
them in eclipse (without maven and such), and I have the
neo4j-community sources as a project, and I am including this project
in any of my projects that require
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
___
Neo4j mailing list
User@lists.neo4j.org
Hi SRay,
If you want test out and update the Wiki, that would be most appreciated!
Both Craig and me are low on cycles right now, Saikat is working on the
RTree and Andreas on putting PostGIS functions into place.
If if you fork the codebase, please send in the CLA as described in the code
Hi Jörg,
I understand your view. However, as there is no support for scopes in
OSGi, the reasonable approach would be to import ALL dependencies for
all Neo4j code. That would require quite substancial numbers of
bundles for e.g. the enterprise edition that pollute the Bundle Space
for the whole
but but I don't know what osgi and project bundle stuff really is :) I
don't think I would need that for what I want. (if those mean building as
.jar or using jars)
What I actually want is to keep the neo4j-community project (which is git
linked to the github sources), keep this as source only
For sources,
I guess you would need to mount the src/main/resources folders as
source folders in order to have the META-INF/services files on the
classpath. Does that work?
Cheers,
/peter neubauer
GTalk: neubauer.peter
Skype peter.neubauer
Phone +46 704 106975
LinkedIn
Yup,
have pulled and can see it. Thanks! Will ask the Toni for a way to
cleanly shut down the framework so we can get both tests working.
/peter
On Mon, Jul 18, 2011 at 11:58 PM, Peter Neubauer
neubauer.pe...@gmail.com wrote:
Nicolas,
I am away for 2 days, will try it out after that. Thanks
that is awesome! that file is there:
..\workspace\neo4j-community\lucene-index\src\main\resources\META-INF\services\
though if I add lucene-index\src\main\resources\ as source folder, i get
some weird java exception and no-class def found error :))
but you probably only wanted me to add it in
Hi there,
this is not Neo4j using this file, but the Java Service Loader
requiring this,
http://download.oracle.com/javase/6/docs/api/java/util/ServiceLoader.html
If you find some programatic way to add services, that could be good
for the OSGi setup scenarios, too :)
Cheers,
/peter neubauer
Hehe,
On Wed, Jul 20, 2011 at 8:22 PM, cyuczi eekc cyuczie...@gmail.com wrote:
PS: you mispelled programmatic =)) (I'm actually laughing with you, not at
you xD)
As I am a Gmail fanboy, I blame Google for not introducing a Do not
send if misspelled button. The Undo send I use in around 60% of
How would I go about retrieving all nodes for a certain relationship Type
(ie. assuming I don't know any of them nodes) ? (in java code, the other
variants rest/cypher I will probably not need to use)
ie. rel.getAllNodes(Direction.INCOMING)
or rel.getAllNodes(Direction.OUTGOING)
or Direction.BOTH
Hey,
How would I go about retrieving all nodes for a certain relationship Type
(ie. assuming I don't know any of them nodes) ?
Use an index. I don't know in native Neo4j off the top of my head, but the
analogous to this in Blueprints:
g.getIndex(edges, Edge.class).get(label,myType)
Hi,
Responses from calling the Neo4j APIs are typically lazy, for performance
reasons. So there's no way of eagerly counting the number of relationships
unless you force eager evaluation as you've suggested below.
Jim
On 20 Jul 2011, at 11:13, cyuczi eekc wrote:
Is there a way to get the
Hello everyone
May I chime in here...
We are really interested to see neo4j working in an OSGi environment
esp. together with Spring Data Graph. After an unsuccessful attempt to
get it up and running a couple of weeks ago we gave it another chance
today after seeing this post and after a whole
Hi Jean-Pierre,
sorry for the inconvenience, the Tinybundles version is not yet
released by the OPS4J team, so you can build it yourself from
https://github.com/ops4j/org.ops4j.pax.tinybundles
with
mvn clean install
Feedback is appreciated!
Cheers,
/peter neubauer
GTalk: neubauer.peter
My understanding of the J2EE standard is that you should *not* do file I/O
from inside a bean (my assumption is to avoid issues if you run in a
clustered environment). If I access Neo4j directly from a bean, wouldn't I
be violating that?
I am not currently clustered, and my app is small enough I
Hi Peter,
thanks for reply!
Is there any chance to get the old index API back, as an *alternative* to the
new one?
Within an OSGi environment the old index API worked perfectly in Neo4j 1.0,
1.1, and 1.2. In the latter ones the old index API friendly coexists with the
new
Hi Peter
When I ran mvn install, I got:
...
[WARNING] Warning building bundle
org.ops4j.pax.tinybundles:tinybundles:bundle:1.0.0-SNAPSHOT
...
[INFO] Installing
org/ops4j/pax/tinybundles/tinybundles/1.0.0-SNAPSHOT/tinybundles-1.0.0-SNAPSHOT.jar
I think there is a tinybundles to much in between.
I guess I was hoping it(size/count) was cached in the database or the
underlaying database would provide this somehow, ie. in berkeleydb (java
edition) there's a cursor.count() I could use (though I don't know how they
did it implementation-wise)
Thanks! I needed to know that.
On Wed, Jul 20,
To simplify the use of IndexedRelationships, I added support for the use case
where relationships are placed in an index based on the value of a property of
the node added.
Hereto, I added wrappers for property types for all data types supported.
There is also a specialized version of
@Michael I am glad that this feature will be added in 1.5 and I already did
the java code but I wanted to do it with server.
@Marko thanks. I just tried to do it with Gremlin but I have not your
knowledge of gremlin. I will try to do that.
--
View this message in context:
Hey,
@Marko thanks. I just tried to do it with Gremlin but I have not your
knowledge of gremlin. I will try to do that.
If you use Neo4j Server 1.4, then you will be in Gremlin 1.1 land. I don't know
what you are rolling with (embedded, server, etc.), but if you want the query
in Gremlin
@Marko I am using neo4j 1.4 server so I guess I am running gremlin 1.1.
It would be cool if you can send me the compatible query when you have time.
--
View this message in context:
Hi all,
I'm trying to implement full support for unicode in my neo4j Python
REST client, but I'm finding some dificulties:
- I send a property key such as p r öp€rtŷ, and I'm able to get
everything working using a URL encoding, that converts that string
into
Just curious - as I traced down OSGI service loading from the neo4j
Service class it commented out, so the only Java META-INF/services
used in any environment. May be that's the case ?
On Wed, Jul 20, 2011 at 4:55 AM, Jörg Richter j...@deepamehta.de wrote:
Thanks for replies!
Yes, the super
@Marko I am using neo4j 1.4 server so I guess I am running gremlin 1.1.
It would be cool if you can send me the compatible query when you have time.
Good, cause time is all I have.
m = [:]
Hi,
Sorry, but i know anything about the core structure of neo4j-spatial and the
code source of the project is really big, so i don't know how to begin to
search for patch this error :-/
I have only a null pointer exception in the geoserver.log, it's few :/
If a dev contributor of neo4j-spatial
Ahh,
sorry, seems Tinybundles changes groupId and API since my last pull.
Pushed the updates. Please try again :)
Cheers,
/peter neubauer
GTalk: neubauer.peter
Skype peter.neubauer
Phone +46 704 106975
LinkedIn http://www.linkedin.com/in/neubauer
Twitter
Does it auto fail? Considering how I see in the examples, it does
auto-fail... if it doesn't then maybe the doc for tx.finish() should specify
what happens, or even throw ? if there isn't a specified default.
Ah, I just read the javadoc for Transaction (interface):
If an exception is raised in
Yes, right.
Neo4j right now is only using Java Service Loader. Reason for that is
that, as stated in the other thread, it's very hard to decide on the
granularity of exposed services without spamming the Service Registry
with Neo4j internal stuff. If we register every index provider and
kernel
Hi there,
I would love to check this out, but will be traveling for the next week. Is
it ok if this takes a few weeks to get to? Otherwise, maybe someone else can
get his hands dirty to update the GeoServer tutorial?
/peter
On Wed, Jul 20, 2011 at 10:41 PM, reyman reyma...@gmail.com wrote:
Hi,
And, there was a bug in Pax Exam not shutting down the bundles
properly. Fixed by Toni Menzel in 5 minutes. Thanks!
I added some build instructions to https://github.com/neo4j/neo4j-osgi
to get things working. Give it a try!
Cheers,
/peter neubauer
GTalk: neubauer.peter
Skype
btw, sorry about the Tinybundles disruption. The group id org.ops4j.pax
was actually wrong since ripping out tinybundles from pax swissbox.
Actually there will be just one tinybundles artifact and it will carry 1.0
really soon.
Until then you may grab latest artifacts from
Javier,
do you have the curl command for this? We can just add a test case and
fix it. Thanks!
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
There is another point in the doc that is not correct. The doc states
out that you can call tx.success after tx.failure. In this case the
transaction stays at being fault. So one call to tx.failure causes a
rollback when calling tx.finish, also when there are further calls to
tx.success before or
Very cool stuff Nils!
Now, a good question is how to document this. Are the interfaces all
like normal collections? Maybe we could write some introductory text
and pull code from the tests into the docs. Have you been able to get
the manual buidl working at your machine, see
Hi, Peter
On Wed, Jul 20, 2011 at 18:32, Peter Neubauer
peter.neuba...@neotechnology.com wrote:
Javier,
do you have the curl command for this? We can just add a test case and
fix it. Thanks!
The server works great, but the problem is, in practice, it's not
possible to set property keys with
Thank Peter.
I did a write up on IndexedRelationships on the Github wiki:
https://github.com/peterneubauer/graph-collections/wiki/Indexed-relationships
That one needs to be updated to reflect property-indexed-relationships.
SortedTree, PropertySortedTree, IndexedRelationship all implement
To answer a few of your questions:
Neo4j is a database, GraphDatabaseService encapsulates your connection to
that database.
You don't mind using other databases from J2EE. If you run clustered just use
Neo4j's High Availability mode across the cluster.
As Neo4j has no concept of a connection
Caching that result would require synchronizing it with every change using up
memory and performance (at every change) for something that can be computed
So far it has not been worth the effort.
If you really need that value very often you could write a small
TransactionEventHandler that keeps
Graphistas of the North,
Join us at Mozilla Labs in Vancouver next Wednesday, the 27th, for a graph
meetup with the inimitable Peter Neubauer[1]...
Every graph starts with a single node, then branches out. So, we'll start with
a general introduction to graphs, discussing the concepts,
Javier,
what is the concrete error that happens if you send over that space + slash
encoded property?
Cheers
Michael
Am 21.07.2011 um 01:15 schrieb Javier de la Rosa:
Hi, Peter
On Wed, Jul 20, 2011 at 18:32, Peter Neubauer
peter.neuba...@neotechnology.com wrote:
Javier,
do you have
Seattlite Graphistas,
No need for a border crossing next Wednesday the 27th to talk about graphs,
because we'll be meeting in Seattle, making an appearance at the monthly Hadoop
meetup[2].
After a brief introduction to graph databases for the uninitiated, we'll review
the new features of the
Trying to count the relationships the normal way I find that oddly, I
cannot see more than 100+x relationships, where x is the maximum number of
relations ever added within a transaction.
For example, if I add 91 relationships in a transation, and I count them,
I have 91. I run the program again
I should probably mention that I am using neo4j community (embedded) latest
sources up to date from github
On Thu, Jul 21, 2011 at 4:59 AM, cyuczi eekc cyuczie...@gmail.com wrote:
Trying to count the relationships the normal way I find that oddly, I
cannot see more than 100+x relationships,
Ok there, I found out something new, if I do the count outside of the
transaction (ie. after tx.finish() ) then it works right,
ie. in a different example:
Node `one` has 100,100 out rels, time=7,954,653,001
tx.finish() time=1,525,669,261
Node `one` has 1,200,546 out rels
And as long as I create
When trying to use the same database (or path) from two different java
programs, the second one cannot open it. Is this normal ? Can't two or more
java programs work on the same (embedded)database ? I used BerkeleyDB (java
edition) before, and this was possible, hence why I was expecting this with
Hi Cyuczi,
You can't open the same database twice in two programs. If you want data to be
replicated between Neo4j instances, look into HA:
http://docs.neo4j.org/chunked/stable/ha-how.html
http://wiki.neo4j.org/content/High_Availability_Cluster
Jim
I took a quick glance, though it seems they are duplicating(replicating?)
the database, but I was hoping I could use only one database (instead of
having multiple copies of it, though this would be good in the future of
course).
With this in mind, what should I look for? maybe neo4j server ? that
I you want to have a read-only-snapshot view of the database you can also use
new EmbeddedReadOnlyGraphDatabase(path);
Cheers
Michael
Am 21.07.2011 um 05:31 schrieb Jim Webber:
Hi Cyuczi,
You can't open the same database twice in two programs. If you want data to
be replicated between
Thanks Michael, that is good to know...
I would've tried that right now, for tests, but unfortunately I get that
silly error No index provider 'lucene' found, but only when using
EmbeddedReadOnlyGraphDatabase, not EmbeddedGraphDatabase. Perhaps it would
be worth mentioning that in order to not
Probably you have to add that for the other project too ?
Am 21.07.2011 um 05:57 schrieb cyuczi eekc:
Thanks Michael, that is good to know...
I would've tried that right now, for tests, but unfortunately I get that
silly error No index provider 'lucene' found, but only when using
Anyway as Peter said it should work to add the
.\lucene-index\src\main\resources
as source path to your eclipse project. You said you were getting exceptions
with eclipse.
What kind of exceptions are those?
Michael
Am 20.07.2011 um 20:25 schrieb Peter Neubauer:
Hehe,
On Wed, Jul 20,
It is not necessary however your reply made me retest, and it works as it
were, but it only shows that error, if, I run the program with
EmbeddedGraphDatabase and put it in an 100 second sleep(so that it keeps the
database open), and then I change it to EmbeddedReadOnlyGraphDatabase and
run it
If you run into errors, please make sure to include the exceptions in the
e-mail.
Verbal descriptions are sometimes hard to follow without having the code and
the environment.
You mean you take the same program and exchange the code line to use
EmbeddedReadOnlyGraphDb ?
Why do you do that?
Summary: it works if you set \lucene-index\src\main\resources as source
folder (no need to set it as class folder)
--
yes, if I add it as source folder instead of add it as class folder
let's see, reproducing...
wow, it is working now, how odd... (so adding it as source folder works)
well
Yeah sorry about that :)
Bottom line is, EmbeddedReadOnlyGraphDb works.
It only displays the `lucene index not found error` when the database(path)
is already in use by another program. Otherwise it just works.
I should've said this, it's simpler to understand.
To answer your question, I was
now looking back at HA, I see here:
Porting your application to run on Neo4j-HA
As mentioned earlier the only thing that needs to change is the creation of
the graph database service. In single machine operations the
EmbeddedGraphDatabase class should be used while in multi machine HA
about this, should I create an issue?
On Thu, Jul 21, 2011 at 5:15 AM, cyuczi eekc cyuczie...@gmail.com wrote:
Ok there, I found out something new, if I do the count outside of the
transaction (ie. after tx.finish() ) then it works right,
ie. in a different example:
Node `one` has 100,100
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