Error While Executing Multiple Gremlin Script using Groovy

[Vijay]

Hi All,

I am trying to execute multiple gremlin script using Groovy Pointing to Neo4J server. when I execute a single script I am able to get the response.

Execution Of single Gremlin Script code snippet:

def http = new groovyx.net.http.HTTPBuilder()

http.post(    uri: 'http://localhost:7474/db/data/ext/GremlinPlugin/graphdb/execute_script',

body: 'script=' + "g.v(1)",

requestContentType: URLENC) { resp,reader -> 

println "--------- Printing Status --------"

println "Success! ${resp.status}"

println "----------Printing Content type----------"

println "${resp.headers.'Content-Type'}"

println "---------------------------------"

println reader

}

Response obtained when Printing the Reader: 

[outgoing_relationships:http://localhost:7474/db/data/node/1/relationships/out, data:[Type:REFERENCE, ID:USER_REFERENCE, Label:USER_REFERENCE, CreateDate:2012-07-06T15:32:11.455-04:00], traverse:http://localhost:7474/db/data/node/1/traverse/{returnType}, all_typed_relationships:http://localhost:7474/db/data/node/1/relationships/all/{-list|&|types}, property:http://localhost:7474/db/data/node/1/properties/{key}, self:http://localhost:7474/db/data/node/1, properties:http://localhost:7474/db/data/node/1/properties, outgoing_typed_relationships:http://localhost:7474/db/data/node/1/relationships/out/{-list|&|types}, incoming_relationships:http://localhost:7474/db/data/node/1/relationships/in, extensions:[:], create_relationship:http://localhost:7474/db/data/node/1/relationships, paged_traverse:http://localhost:7474/db/data/node/1/paged/traverse/{returnType}{?pageSize,leaseTime}, all_relationships:http://localhost:7474/db/data/node/1/relationships/all, incoming_typed_relationships:http://localhost:7474/db/data/node/1/relationships/in/{-list|&|types}]

But when I try to execute multiple Script using Groovy I am getting a Missing Property exception.

Execution of Multiple Gremlin Script Code Snippet:

def http = new groovyx.net.http.HTTPBuilder()

http.post(    uri: 'http://localhost:7474/db/data/ext/GremlinPlugin/graphdb/execute_script',

body: 'script=' + "userid=g.v(45);known_items=[];g.v(45).out('PERFORMS').out('PUCHASED').out('BELONGS_TO').dedup.aggregate(known_items);",

requestContentType: URLENC) { resp,reader -> 

println "--------- Printing Status --------"

println "Success! ${resp.status}"

println "----------Printing Content type----------"

println "${resp.headers.'Content-Type'}"

println "---------------------------------"

println reader

}

Response Obtained when executing Multiple Gremlin Script: The gremlin script has a variable "userid" and "known_items"..

2012-07-19 10:22:22,047 DEBUG  wire - << "  "message" : "javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: userid for class: Script2",[\r][\n]"2012-07-19 10:22:22,047 DEBUG  wire - << "  "exception" : "org.neo4j.server.rest.repr.BadInputException: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: userid for class: Script2",[\r][\n]"2012-07-19 10:22:22,047 DEBUG  wire - << "  "stacktrace" : [ "org.neo4j.server.plugin.gremlin.GremlinPlugin.executeScript(GremlinPlugin.java:88)", "java.lang.reflect.Method.invoke(Unknown Source)",

How to resolve the above mentioned error.

Sample code snippet would help me to solve this issue.

Thanks

Vijay

[Peter Neubauer]

Vijay,

the URL encoding is a bit brittle if you send long scripts, which might lead to escaping errors. I actually think we should disallow that, and only send JSON encoded requests, like http://docs.neo4j.org/chunked/snapshot/gremlin-plugin.html#rest-api-group-count

Can you please try that?

/peter

--

Cheers,

/peter neubauer

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S:  peter.neubauer
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