Auto indexed keys missing

[vlg]

Hello there,

I'm faced to an issue regarding auto-indexding in neo4j. When I create an automatic index (either at database creation, or afterward using the startAutoIndexProperty method), everything is fine. Now if I shutdown the database and reopen it, the keys seems not to be indexed anymore.

Here is a small snippet to illustrate this:

import org.neo4j.graphdb.GraphDatabaseService;

import org.neo4j.graphdb.factory.GraphDatabaseFactory;

import org.neo4j.graphdb.factory.GraphDatabaseSettings;

import org.neo4j.kernel.EmbeddedGraphDatabase;

public class Test

{

    public static void main(String [] args) {

        GraphDatabaseService graphDb = new GraphDatabaseFactory().

                newEmbeddedDatabaseBuilder( "C:\\NeoTest" ).

                setConfig( GraphDatabaseSettings.node_auto_indexing, "true" ).

                setConfig( GraphDatabaseSettings.node_keys_indexable, "ID" ).

                newGraphDatabase();

        

        System.out.println(graphDb.index().getNodeAutoIndexer().isEnabled());

        System.out.println(graphDb.index().getNodeAutoIndexer().getAutoIndexedProperties());

        

        graphDb.shutdown();

        

        // Reopen it

        graphDb = new EmbeddedGraphDatabase("C:\\NeoTest");

        

        // Keys are missing

        graphDb.index().getNodeAutoIndexer().setEnabled(true);

        System.out.println(graphDb.index().getNodeAutoIndexer().getAutoIndexedProperties());

        

        graphDb.shutdown();

    }

}

This gives me:

true

[ID]

[]

 

 Any idea ?

I'm using Neo4j 1.7.2 community on Windows 7.

Thanks in advance!

 

[Michael Hunger]

auto-index information is not persistet

you have to provide the same config to the db when you reopen it.

Michael

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[vlg]

Thank you for your answer. 

I guess I've to maintain a file in the database directory containing all keys that are indexed.

Does Neo4j provides a conveinient way of doing this ? (except using a pseudo-node in which i'd store a property containing all indexed keys)

Vincent

[Michael Hunger]

That's what you usually use the neo4j.properties file for that you pass to the db at startup.

http://docs.neo4j.org/chunked/snapshot/tutorials-java-embedded-setup.html#tutorials-java-embedded-setup-startstop

Michael

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