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] <javascript:>>
>>>> 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?
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