See the gremlin docs for running gremlin on top of Neo4j. You might also want to have a look at the github.com/neo4j-contrib/neo4j-tinkerpop-api-impl Which also comes with a procedure to run Gremlin from Cypher, the procedure implementation should help you in getting started in Java.
On Fri, Feb 3, 2017 at 3:18 PM, Spandana Otra <[email protected]> wrote: > > > On Wednesday, June 6, 2012 at 5:50:16 PM UTC+5:30, Neo wrote: > >> Resolved!! Thanks for the help Mark. >> >> On Wednesday, June 6, 2012 12:42:06 PM UTC+5:30, Neo wrote: >> >>> Hey thanks Mark, I have tried according to your instructions with >>> following code. >>> >>> import javax.script.ScriptEngine;import javax.script.ScriptEngineManager; >>> import com.tinkerpop.blueprints.pgm.Graph;import >>> com.tinkerpop.blueprints.pgm.impls.neo4j.Neo4jGraph; >>> public class query_caller{ >>> public static void main(String[] args){ >>> ScriptEngineManager manager = new ScriptEngineManager(); >>> ScriptEngine engine = manager.getEngineByName("gremlin-groovy"); >>> Graph graph = new >>> Neo4jGraph("E:/Projects/Neo4j/neo4j-community-1.7/data/graph.db"); >>> >>> }} >>> >>> >>> >>> But I got following error. >>> >>> Exception in thread "main" org.neo4j.graphdb.TransactionFailureException: >>> Could not create data source [nioneodb], see nested exception for cause of >>> error >>> at >>> org.neo4j.kernel.impl.transaction.TxModule.registerDataSource(TxModule.java:153) >>> at org.neo4j.kernel.GraphDbInstance.start(GraphDbInstance.java:111) >>> at >>> org.neo4j.kernel.EmbeddedGraphDbImpl.<init>(EmbeddedGraphDbImpl.java:190) >>> at >>> org.neo4j.kernel.EmbeddedGraphDatabase.<init>(EmbeddedGraphDatabase.java:80) >>> at >>> org.neo4j.kernel.EmbeddedGraphDatabase.<init>(EmbeddedGraphDatabase.java:64) >>> at >>> com.tinkerpop.blueprints.pgm.impls.neo4j.Neo4jGraph.<init>(Neo4jGraph.java:71) >>> at >>> com.tinkerpop.blueprints.pgm.impls.neo4j.Neo4jGraph.<init>(Neo4jGraph.java:62) >>> at query_caller.main(query_caller.java:12) >>> Caused by: >>> org.neo4j.kernel.impl.transaction.xaframework.IllegalLogFormatException: >>> Invalid log format version found, expected 1 but was 2. To be able to >>> upgrade from an older log format version there must have been a clean >>> shutdown of the database >>> at >>> org.neo4j.kernel.impl.transaction.xaframework.LogIoUtils.readLogHeader(LogIoUtils.java:54) >>> at >>> org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.readLogHeader(XaLogicalLog.java:1213) >>> at >>> org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.doInternalRecovery(XaLogicalLog.java:742) >>> at >>> org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.open(XaLogicalLog.java:230) >>> at >>> org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.open(XaLogicalLog.java:184) >>> at >>> org.neo4j.kernel.impl.transaction.xaframework.XaContainer.openLogicalLog(XaContainer.java:97) >>> at >>> org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource.<init>(NeoStoreXaDataSource.java:143) >>> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) >>> at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) >>> at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown >>> Source) >>> at java.lang.reflect.Constructor.newInstance(Unknown Source) >>> at >>> org.neo4j.kernel.impl.transaction.XaDataSourceManager.create(XaDataSourceManager.java:75) >>> at >>> org.neo4j.kernel.impl.transaction.TxModule.registerDataSource(TxModule.java:147) >>> ... 7 more >>> >>> On Tuesday, June 5, 2012 10:03:17 PM UTC+5:30, Marko Rodriguez wrote: >>> >>>> Hi, >>>> >>>> There is an example here: >>>> >>>> https://github.com/tinkerpop/gremlin/wiki/Using-Gremlin-through-Java >>>> >>>> See the last section entitled: >>>> Using JSR 223 GremlinGroovyScriptEngine >>>> >>>> Where instead of >>>> >>>> graph = TinkerGraphFactory.createTinkerGraph(); >>>> >>>> do >>>> graph = new Neo4jGraph(...); >>>> >>>> Good luck, >>>> Marko. >>>> >>>> http://markorodriguez.com >>>> >>>> On Jun 5, 2012, at 9:46 AM, Neo wrote: >>>> >>>> Hey Peter, >>>> Thanks for the reply. Could you please kindly give a very simple sample >>>> code to run queries on a Neo4j graphdb (not based on gremlin plug-in for >>>> REST API). It's very difficult for me to comprehend from the link you have >>>> give. >>>> >>>> On Tuesday, June 5, 2012 9:05:54 PM UTC+5:30, Peter Neubauer wrote: >>>> >>>>> Hi there, >>>>> you put the reference to any bound variables in a map and give it to >>>>> the engine for evaluation, look at the Gremlin plugin for reference, >>>>> >>>>> https://github.com/neo4j/gremlin-plugin/blob/master/src/ >>>>> main/java/org/neo4j/server/plugin/gremlin/GremlinPlugin.java#L81 >>>>> >>>>> Cheers, >>>>> >>>>> /peter neubauer >>>>> >>>>> G: neubauer.peter >>>>> S: peter.neubauer >>>>> P: +46 704 106975 >>>>> L: http://www.linkedin.com/in/neubauer >>>>> T: @peterneubauer >>>>> >>>>> If you can write, you can code - @coderdojomalmo >>>>> If you can sketch, you can use a graph database - @neo4j >>>>> >>>>> >>>>> On Tue, Jun 5, 2012 at 7:52 AM, Neo <[email protected]> wrote: >>>>> > Hello, >>>>> > I am trying to execute gremlin queries(that I can execute on >>>>> console) >>>>> > in Java directly(not through REST-API) similar to executing Cypher >>>>> queries. >>>>> > Some documentation is given at which gives following instructions >>>>> > >>>>> > 1 ScriptEngineManager manager = new ScriptEngineManager(); >>>>> > 2 ScriptEngine engine = manager.getEngineByName("gremlin-groovy"); >>>>> > 3 // or, instead of above, simply do: >>>>> > 4 // ScriptEngine engine = new >>>>> > GremlinGroovyScriptEngineFactory().getScriptEngine(); >>>>> > 5 // or >>>>> > 6 // ScriptEngine engine = new GremlinGroovyScriptEngine(); >>>>> > 7 Graph graph = TinkerGraphFactory.createTinkerGraph(); >>>>> > 8 List results = new ArrayList(); >>>>> > ... >>>>> > 9 engine.eval("v.out('knows'){it.name.equals(name)}.fill(results)"); >>>>> >>>>> > 10 String script = "i = 0\n" + >>>>> > "for(x in 1..10)\n" + >>>>> > " i++"; >>>>> > 11 engine.eval(script); >>>>> > >>>>> > In line number 7 I have to give a reference to my graphdb, I have >>>>> tried >>>>> > following >>>>> > >>>>> > Graph graph = new Neo4jGraph($PATH); >>>>> > >>>>> > But I am not able to query anything on the graph. How can I give the >>>>> > reference to my graphdb to Execution Engine? >>>>> > I tried exploring further, but still after one full day, I can not >>>>> execute >>>>> > simple queries on my graphdb . Please tell any other alternative >>>>> than this >>>>> > if any. >>>>> > >>>>> > Thanks >>>>> >>>> How to execute through engine gremlin queries on neo4j database in > java? > > > -- > You received this message because you are subscribed to the Google Groups > "Neo4j" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
