Re: [orientdb] running a gremlin query in groovy using groovyc , code examples
What you're missing is (1) initializing Gremlin, and (2) collecting
results. To initialize Gremlin, your code needs to execute the following
once (and preferably only once):
import com.tinkerpop.gremlin.groovy.Gremlin
Gremlin.load()
Once you've done that, you can run your query. Right now your method
creates a Gremlin query, but hasn't started it. There are lots of ways to
collect results; one way would be to use the Groovy collect() if you're
expecting a list of results. For something more complicated, such as the
what you're doing, I'd suggest something like this:
import com.tinkerpop.pipes.util.structures.Table
def t = new Table()
s.outE.inV.loop(2){it.object.firstName!=targetName it.loops
6}.path.filter{it.last().firstName==targetName}.transform{[it.findAll{it
instanceof Edge}.sum{it.weight}, it]}.table( t ).iterate()
That should give you a table structure that contains your results.
- Craig -
On Fri, Mar 20, 2015 at 12:24 PM, sck2015 sonukhullar@gmail.com wrote:
I am trying to find path traversals and explore them by increasing weight,
I was able to do this in gremlin and was trying to replicate the code in
groovy (using groovyc to compile a groovy file and integrate with my other
java code)... Can someone point me to documentation or how to execute the
following query in a .groovy file, my understanding is that gremlin is
interpreted by groovy but I cannot cache the results of the following
pipeline which should return a set of weights and paths:
public static List findAllPaths(Vertex s, Vertex e) {
String targetName = e.getProperty(firstName);
// look at paths that end at target, match on first name, calc
weights of these paths
results = s.outE.inV.loop(2){it.object.firstName!=targetName
it.loops
6}.path.filter{it.last().firstName==targetName}.transform{[it.findAll{it
instanceof Edge}.sum{it.weight}, it]};
// how to save results of pipe
}
I've gotten simple gremlin queries to return and pass back a list to java,
I could try stringing together gremlin pipelines but I thought the point of
having .groovy files was to be able to use/integrate gremlin directly to
talk to java, thanks, Sonu
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[orientdb] Re: Can't ETL CSV with null values into mandatory table
OrientDB Server v2.0.2
To reproduce, load a csv with null values into a vector in strictmode with
all parameters set to mandatory.
On Friday, March 27, 2015 at 9:08:46 PM UTC-4, Jeffrey Auguste wrote:
My database is in strictmode and I have set all the field properties to
mandatory and remain nullable. Trying to load a csv into the vertex and it
fails when loading a null value.
Error: The field 'Vertex.Field' is mandatory, but not found on record:
The CSV record has a value of NULL for some of the fields and I am
converting that to an actual null value in the control file.
I.E. { csv: {nullValue: NULL} }
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Re: [orientdb] Stable version of OrientDb for distributed environment?
Hi Simon, thank you for your reply, 2.0.5 isn't stable in distributed mode by any means, I'll try to do what you suggest - thank you On Saturday, March 28, 2015 at 1:25:46 PM UTC+1, Simon Gemmell wrote: Uffe we had some issues with distributed mode with 2.0.5 which have apparently been fixed in the latest version of the code. Given the defect density thus far I am wary but perhaps 2.0.6 will work for you when it is released. It is easy to get the code and build it yourself, use the 2.0.x branch. On Saturday, March 28, 2015 at 8:13:36 AM UTC+11, Lvc@ wrote: Hi Uffe, Get OrientDB 2.0.5 Lvc@ On 27 March 2015 at 18:07, Uffe Gavnholt ugav...@gmail.com wrote: Hi All, I'm having trouble finding a version of OrientDb that is stable enough for a production environment in a distributed setup, I've tried the versions I could find from 2.0.0 and on. Do anyone have experiences with a release that behaves, specificly it appears to be distributed transactions that are unstable in current releases? Best regards Uffe Gavnholt -- --- You received this message because you are subscribed to the Google Groups OrientDB group. To unsubscribe from this group and stop receiving emails from it, send an email to orient-databa...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- --- You received this message because you are subscribed to the Google Groups OrientDB group. To unsubscribe from this group and stop receiving emails from it, send an email to orient-database+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[orientdb] Best practice: How to properly set an potentially unsafe RID?
Hi everyone. I just have a quick best practice question. I want to set a Link property on a class instance. I have the RID of the link target as a string. The naive approach would look like this. 'INSERT INTO MyClass SET myLink = ' + itemId (I can't use a parameter, because Oriento (wisely) escapes all input strings) The trouble is, the the value for itemId comes in form of a user input over the internet. So I think a saver way would be to do it like this: insert into MyClass set myLink = (select from OtherClass where @rid = :itemId) Unfortunately params in sub queries don't work currently, so I resort to building the sub query with Oriento and adding it as a string. But what is you general take on this? Is there a better way to do it? Cheers Georg -- --- You received this message because you are subscribed to the Google Groups OrientDB group. To unsubscribe from this group and stop receiving emails from it, send an email to orient-database+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [orientdb] Hooks on vertices and edges
FYI I created the Java Hook Tutorial and pushed it to master branch under docs section 9.3. On Fri, Mar 27, 2015 at 11:05 AM, W. Craig Trader craig.tra...@gmail.com wrote: David ... In the short term, please share with the group. - Craig - On Fri, Mar 27, 2015 at 10:44 AM, David Carr dcarr...@gmail.com wrote: Followup questions: 1. I'm using orientdb server version 2.0.5 so classes V and E are already there by default as soon as I create the database. Can you elaborate on exactly how to accomplish let V and E extend OTriggered? 2. I was successful in creating a java hook despite the documentation being very hard to follow, incomplete, and containing bad examples that produce compile errors. I would like to put what I've learned and have working into some sort of summary that I can contribute back to the community for the next user who comes along. Do you have any suggestions on the best way to do this? One of the best things I like about http://php.net/manual/ is the user contributed notes at the bottom of each page. I don't see anything like that in the orientdb online manual. I could post a summary to this google group if that's the best way. Or possibly enhancing the online manual via a feature branch on git? Let me know. On Thursday, March 26, 2015 at 12:14:26 AM UTC-6, Luigi Dell'Aquila wrote: Hi David, you can just let V and E extend OTriggered, or define your hooks in Java if you want to avoid it. Regards Luigi 2015-03-26 0:40 GMT+01:00 David Carr dcar...@gmail.com: After a bit of trial and error, I have been able to get hooks working on custom classes extended from the OTriggered class. However, I need hooks working on classes extended from V and E. I can't get it to work in my tests. Does anyone out there know if hooks are possible on vertices and edges or if this is on the development roadmap somewhere? -- --- You received this message because you are subscribed to the Google Groups OrientDB group. To unsubscribe from this group and stop receiving emails from it, send an email to orient-databa...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- --- You received this message because you are subscribed to the Google Groups OrientDB group. To unsubscribe from this group and stop receiving emails from it, send an email to orient-database+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- --- You received this message because you are subscribed to a topic in the Google Groups OrientDB group. To unsubscribe from this topic, visit https://groups.google.com/d/topic/orient-database/pq-SqklprHs/unsubscribe. To unsubscribe from this group and all its topics, send an email to orient-database+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- David Carr 801.231.4946 -- --- You received this message because you are subscribed to the Google Groups OrientDB group. To unsubscribe from this group and stop receiving emails from it, send an email to orient-database+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[orientdb] Activity Feed
Hi, Has anybody implemented an activity feed in Orient? Something like Linkedin or Twitter. I am looking for examples on how to do this? Tom -- --- You received this message because you are subscribed to the Google Groups OrientDB group. To unsubscribe from this group and stop receiving emails from it, send an email to orient-database+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [orientdb] Stable version of OrientDb for distributed environment?
Uffe we had some issues with distributed mode with 2.0.5 which have apparently been fixed in the latest version of the code. Given the defect density thus far I am wary but perhaps 2.0.6 will work for you when it is released. It is easy to get the code and build it yourself, use the 2.0.x branch. On Saturday, March 28, 2015 at 8:13:36 AM UTC+11, Lvc@ wrote: Hi Uffe, Get OrientDB 2.0.5 Lvc@ On 27 March 2015 at 18:07, Uffe Gavnholt ugav...@gmail.com javascript: wrote: Hi All, I'm having trouble finding a version of OrientDb that is stable enough for a production environment in a distributed setup, I've tried the versions I could find from 2.0.0 and on. Do anyone have experiences with a release that behaves, specificly it appears to be distributed transactions that are unstable in current releases? Best regards Uffe Gavnholt -- --- You received this message because you are subscribed to the Google Groups OrientDB group. To unsubscribe from this group and stop receiving emails from it, send an email to orient-databa...@googlegroups.com javascript:. For more options, visit https://groups.google.com/d/optout. -- --- You received this message because you are subscribed to the Google Groups OrientDB group. To unsubscribe from this group and stop receiving emails from it, send an email to orient-database+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [orientdb] interesting question (unanswered) on stackoverflow: does OrientDB support hypergraphs
IMHO it's merely a bug, edge creation should check that both ends are vertices Luigi 2015-03-26 13:12 GMT+01:00 MrFT frederik.til...@vsko.be: http://stackoverflow.com/questions/28781749/am-i-supposed-to-be-able-to-create-edges-between-two-edges-and-or-an-edge-and-a Am I supposed to be able to create edges between two edges and/or an edge and a node in OrientDB? http://stackoverflow.com/questions/28781749/am-i-supposed-to-be-able-to-create-edges-between-two-edges-and-or-an-edge-and-a In OrientDB, I can do CREATE EDGE E from someEdge to AnotherEdge. It will execute with no problem, and the edge will be created. However, if I do this in the graph editor in Studio, it's extremely buggy. The properties/settings window will not work at all. My question is: is it a bug that it lets me create edges between two edges/an edge and a node or is it 'merely' the graph editor that's buggy when I do this? -- --- You received this message because you are subscribed to the Google Groups OrientDB group. To unsubscribe from this group and stop receiving emails from it, send an email to orient-database+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- --- You received this message because you are subscribed to the Google Groups OrientDB group. To unsubscribe from this group and stop receiving emails from it, send an email to orient-database+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
