Re: [Neo4j] Gremlin from Java Error
On Tue, Feb 22, 2011 at 4:26 PM, Marko Rodriguez wrote: > Hey, > >> Thanks a lot. Updated to 0.8-SNAPSHOT. Strangely maven did not resolve >> groovy dependence automatically. Had to add it by hand. > > Huh? Gremlin 0.8-SNAPSHOT uses Groovy 1.7.8 (which was released maybe 1 week > ago). Gremlin 0.7 was using Groovy 1.7.5. Perhaps something about that was > making it burp? What do you mean "add it by hand?" I had to add a dependency to groovy in my pom file, i did not need that with 0.7 (it was inherited?). > >> ScriptEngine approach works fine, Gremlin.compile(expr) does not? > > Were you compiling a Pipe or a Gremlin statement? Compile can only be used to > create a Pipe: > public static Pipe compile(final String gremlin); > See the first section of: > https://github.com/tinkerpop/gremlin/wiki/Using-Gremlin-through-Java > > If you want to do an arbitrary Gremlin statement, then you use > GremlinScriptEngine.eval(); > > ?? Or, is it because you haven't linked Groovy into your project. Realize > that Gremlin class is Gremlin.groovy, not Gremlin.java. Thus, you need to > make sure you have gmaven-pluggin support in your pom.xml. See the second > section of: > https://github.com/tinkerpop/gremlin/wiki/Using-Gremlin-through-Groovy > I have that. Read the docs. >> I understand that it could be faster&cleaner to use groovy, but I need >> to be able to pass string queries and get results back. >> In my use-case this is the definite use of gremlin - arbitrary string >> queries. > > Gotcha. > >> For "static" business logic I can use Pipes - I'm not >> bothered by the wordy expressions. > > > Cool. You can get around that by using Gremlin.compile() :P. In that way, you > can compile a Gremlin statement to get the raw Pipes. I like that idea. But still could not get it to work. Will try to reproduce and send the trace. Thanks, A > > Enjoy, > Marko. > > http://markorodriguez.com > > > > ___ > 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] Gremlin from Java Error
Hey, > Thanks a lot. Updated to 0.8-SNAPSHOT. Strangely maven did not resolve > groovy dependence automatically. Had to add it by hand. Huh? Gremlin 0.8-SNAPSHOT uses Groovy 1.7.8 (which was released maybe 1 week ago). Gremlin 0.7 was using Groovy 1.7.5. Perhaps something about that was making it burp? What do you mean "add it by hand?" > ScriptEngine approach works fine, Gremlin.compile(expr) does not? Were you compiling a Pipe or a Gremlin statement? Compile can only be used to create a Pipe: public static Pipe compile(final String gremlin); See the first section of: https://github.com/tinkerpop/gremlin/wiki/Using-Gremlin-through-Java If you want to do an arbitrary Gremlin statement, then you use GremlinScriptEngine.eval(); ?? Or, is it because you haven't linked Groovy into your project. Realize that Gremlin class is Gremlin.groovy, not Gremlin.java. Thus, you need to make sure you have gmaven-pluggin support in your pom.xml. See the second section of: https://github.com/tinkerpop/gremlin/wiki/Using-Gremlin-through-Groovy > I understand that it could be faster&cleaner to use groovy, but I need > to be able to pass string queries and get results back. > In my use-case this is the definite use of gremlin - arbitrary string > queries. Gotcha. > For "static" business logic I can use Pipes - I'm not > bothered by the wordy expressions. Cool. You can get around that by using Gremlin.compile() :P. In that way, you can compile a Gremlin statement to get the raw Pipes. Enjoy, Marko. http://markorodriguez.com ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Gremlin from Java Error
Thanks a lot. Updated to 0.8-SNAPSHOT. Strangely maven did not resolve
groovy dependence automatically. Had to add it by hand.
ScriptEngine approach works fine, Gremlin.compile(expr) does not?
I understand that it could be faster&cleaner to use groovy, but I need
to be able to pass string queries and get results back.
In my use-case this is the definite use of gremlin - arbitrary string
queries. For "static" business logic I can use Pipes - I'm not
bothered by the wordy expressions.
Alfredas
On Mon, Feb 21, 2011 at 4:23 PM, Marko Rodriguez wrote:
> Hi,
>
> outE(String) is in Gremlin 0.8-SNASPHOT, not Gremlin 0.7.
>
> Note at the bottom of the main Wiki page: "Gremlin documentation is up to
> date with the current Gremlin codebase, not with the latest Gremlin release."
>
> I do this so its easier for me to maintain documentation. The documentation
> for Gremlin 0.7 is in the doc/wiki directory of the distribution.
>
> If you still want to use Gremlin 0.7, do this:
>
> engine.eval("v.outE[[label='KNOWS']].inV >> results");
>
> Finally, I would recommend using Groovy in your codebase instead of JSR 223
> ScriptEngine. Groovy and Java work seamlessly together and its so much
> handier/cleaner/faster than through JSR 223. See:
> https://github.com/tinkerpop/gremlin/wiki/Using-Gremlin-through-Groovy
>
> Hope that helps,
> Marko.
>
> http://markorodriguez.com
>
>
> On Feb 21, 2011, at 9:15 AM, Alfredas Chmieliauskas wrote:
>
>> Dear all,
>>
>> I have the following code:
>>
>> ScriptEngine engine = new GremlinScriptEngineFactory().getScriptEngine();
>> List results = new ArrayList();
>> engine.getBindings(ScriptContext.ENGINE_SCOPE).put("g", getGraph());
>> engine.getBindings(ScriptContext.ENGINE_SCOPE).put("v",
>> getVertex(startNode));
>> engine.getBindings(ScriptContext.ENGINE_SCOPE).put("results", results);
>> try {
>> engine.eval(v.outE('KNOWS').inV >> results");
>> } catch (ScriptException e) {
>> logger.error(e.getMessage(), e);
>> }
>>
>> produces the following error:
>>
>>
>> ERROR javax.script.ScriptException:
>> groovy.lang.MissingMethodException: No signature of method:
>> com.tinkerpop.blueprints.pgm.impls.neo4j.Neo4jVertex.outE() is
>> applicable for argument types: (java.lang.String) values: [KNOWS]
>> Possible solutions: outE(groovy.lang.Closure), dump(),
>> use([Ljava.lang.Object;), getAt(java.lang.String),
>> getAt(java.lang.String), with(groovy.lang.Closure)
>> javax.script.ScriptException: javax.script.ScriptException:
>> groovy.lang.MissingMethodException: No signature of method:
>> com.tinkerpop.blueprints.pgm.impls.neo4j.Neo4jVertex.outE() is
>> applicable for argument types: (java.lang.String) values: [KNOWS]
>> Possible solutions: outE(groovy.lang.Closure), dump(),
>> use([Ljava.lang.Object;), getAt(java.lang.String),
>> getAt(java.lang.String), with(groovy.lang.Closure)
>> at
>> org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:117)
>> at
>> com.tinkerpop.gremlin.jsr223.GremlinScriptEngine.eval(GremlinScriptEngine.java:36)
>> at
>> javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:247)
>> at
>> com.tinkerpop.gremlin.jsr223.GremlinScriptEngine.eval(GremlinScriptEngine.java:32)
>> at
>> alfredas.springdatagraph.template.domain.AbstractRepository.findAllByGremlin2(AbstractRepository.java:94)
>> at alfredas.springdatagraph.template.App.(App.java:84)
>> at alfredas.springdatagraph.template.App.main(App.java:93)
>> Caused by: javax.script.ScriptException:
>> groovy.lang.MissingMethodException: No signature of method:
>> com.tinkerpop.blueprints.pgm.impls.neo4j.Neo4jVertex.outE() is
>> applicable for argument types: (java.lang.String) values: [KNOWS]
>> Possible solutions: outE(groovy.lang.Closure), dump(),
>> use([Ljava.lang.Object;), getAt(java.lang.String),
>> getAt(java.lang.String), with(groovy.lang.Closure)
>> at
>> org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:318)
>> at
>> org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:111)
>> ... 6 more
>> Caused by: groovy.lang.MissingMethodException: No signature of method:
>> com.tinkerpop.blueprints.pgm.impls.neo4j.Neo4jVertex.outE() is
>> applicable for argument types: (java.lang.String) values: [KNOWS]
>> Possible solutions: outE(groovy.lang.Closure), dump(),
>> use([Ljava.lang.Object;), getAt(java.lang.String),
>> getAt(java.lang.String), with(groovy.lang.Closure)
>> at
>> org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:54)
>> at
>> org.codehaus.groovy.runtime.callsite.PojoMetaClassSite.call(PojoMetaClassSite.java:46)
>> at
>> org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40)
>> at
>> org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
>> at
>> org.codehaus.groovy.runtime.callsite.AbstractCallSit
Re: [Neo4j] Gremlin from Java Error
Hi,
outE(String) is in Gremlin 0.8-SNASPHOT, not Gremlin 0.7.
Note at the bottom of the main Wiki page: "Gremlin documentation is up to date
with the current Gremlin codebase, not with the latest Gremlin release."
I do this so its easier for me to maintain documentation. The documentation for
Gremlin 0.7 is in the doc/wiki directory of the distribution.
If you still want to use Gremlin 0.7, do this:
engine.eval("v.outE[[label='KNOWS']].inV >> results");
Finally, I would recommend using Groovy in your codebase instead of JSR 223
ScriptEngine. Groovy and Java work seamlessly together and its so much
handier/cleaner/faster than through JSR 223. See:
https://github.com/tinkerpop/gremlin/wiki/Using-Gremlin-through-Groovy
Hope that helps,
Marko.
http://markorodriguez.com
On Feb 21, 2011, at 9:15 AM, Alfredas Chmieliauskas wrote:
> Dear all,
>
> I have the following code:
>
> ScriptEngine engine = new GremlinScriptEngineFactory().getScriptEngine();
> List results = new ArrayList();
> engine.getBindings(ScriptContext.ENGINE_SCOPE).put("g", getGraph());
> engine.getBindings(ScriptContext.ENGINE_SCOPE).put("v", getVertex(startNode));
> engine.getBindings(ScriptContext.ENGINE_SCOPE).put("results", results);
> try {
>engine.eval(v.outE('KNOWS').inV >> results");
> } catch (ScriptException e) {
>logger.error(e.getMessage(), e);
> }
>
> produces the following error:
>
>
> ERROR javax.script.ScriptException:
> groovy.lang.MissingMethodException: No signature of method:
> com.tinkerpop.blueprints.pgm.impls.neo4j.Neo4jVertex.outE() is
> applicable for argument types: (java.lang.String) values: [KNOWS]
> Possible solutions: outE(groovy.lang.Closure), dump(),
> use([Ljava.lang.Object;), getAt(java.lang.String),
> getAt(java.lang.String), with(groovy.lang.Closure)
> javax.script.ScriptException: javax.script.ScriptException:
> groovy.lang.MissingMethodException: No signature of method:
> com.tinkerpop.blueprints.pgm.impls.neo4j.Neo4jVertex.outE() is
> applicable for argument types: (java.lang.String) values: [KNOWS]
> Possible solutions: outE(groovy.lang.Closure), dump(),
> use([Ljava.lang.Object;), getAt(java.lang.String),
> getAt(java.lang.String), with(groovy.lang.Closure)
> at
> org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:117)
> at
> com.tinkerpop.gremlin.jsr223.GremlinScriptEngine.eval(GremlinScriptEngine.java:36)
> at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:247)
> at
> com.tinkerpop.gremlin.jsr223.GremlinScriptEngine.eval(GremlinScriptEngine.java:32)
> at
> alfredas.springdatagraph.template.domain.AbstractRepository.findAllByGremlin2(AbstractRepository.java:94)
> at alfredas.springdatagraph.template.App.(App.java:84)
> at alfredas.springdatagraph.template.App.main(App.java:93)
> Caused by: javax.script.ScriptException:
> groovy.lang.MissingMethodException: No signature of method:
> com.tinkerpop.blueprints.pgm.impls.neo4j.Neo4jVertex.outE() is
> applicable for argument types: (java.lang.String) values: [KNOWS]
> Possible solutions: outE(groovy.lang.Closure), dump(),
> use([Ljava.lang.Object;), getAt(java.lang.String),
> getAt(java.lang.String), with(groovy.lang.Closure)
> at
> org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:318)
> at
> org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:111)
> ... 6 more
> Caused by: groovy.lang.MissingMethodException: No signature of method:
> com.tinkerpop.blueprints.pgm.impls.neo4j.Neo4jVertex.outE() is
> applicable for argument types: (java.lang.String) values: [KNOWS]
> Possible solutions: outE(groovy.lang.Closure), dump(),
> use([Ljava.lang.Object;), getAt(java.lang.String),
> getAt(java.lang.String), with(groovy.lang.Closure)
> at
> org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:54)
> at
> org.codehaus.groovy.runtime.callsite.PojoMetaClassSite.call(PojoMetaClassSite.java:46)
> at
> org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40)
> at
> org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
> at
> org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124)
> at Script1.run(Script1.groovy:43)
> at
> org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:315)
> ... 7 more
>
>
> And the alternative method:
>
> Gremlin.compile("outE('KNOWS').inV)";
>
> gives:
>
> Exception in thread "main" groovy.lang.MissingMethodException: No
> signature of method: Script1.outE() is applicable for argument types:
> (java.lang.String) values: [KNOWS]
> Possible solutions: run(), run(), dump(), use([Ljava.lang.Object;),
> putAt(java.lang.String, java.lang.Object), with(groovy.lang.Closure)
> at
> org.codehaus.groovy.runtime.ScriptBytecodeAdapter.un
