CODEWITHSUNDEEP
neo4jtinkerpop
Fernando Magalhães
Fernando Magalhães

Reputation: 571

Neo4J: Automatic Indexing on Batch Execution

Is it possible to import data on Neo4J using the automatic indexing feature? I'm trying to import data using BatchInserter and BatchInserterIndex like the following example: 

BatchInserter inserter = BatchInserters.inserter("/home/fmagalhaes/Neo4JDatabase");
BatchInserterIndexProvider indexProvider = new LuceneBatchInserterIndexProvider(inserter);
BatchInserterIndex nodeIndex = indexProvider.nodeIndex("node_auto_index", MapUtil.stringMap("type","exact"));
BatchInserterIndex relIndex = indexProvider.relationshipIndex("relationship_auto_index", MapUtil.stringMap("type","exact"));
...
inserter.createNode(vertexId, properties);
nodeIndex.add(vertexId, properties);
...

The problem is that when batch processing is completed, I'm trying to open this database with Blueprints generic API by doing the following:

Graph g = new Neo4jGraph("/home/fmagalhaes/Neo4JDatabase");
Set<String> nodeIndices = ((KeyIndexableGraph)g).getIndexedKeys(Vertex.class);
Set<String> relIndices = ((KeyIndexableGraph)g).getIndexedKeys(Edge.class);

and both nodeIndices and relIndices are empty. Auto indexing feature is disabled when I open the graph database on Blueprints API. Is it possible to create an automatic index during the batch processing such that this index will be visible (and will continue to index data automatically as properties are added to vertices and edges) when I open the database with Blueprints API?

Upvotes: 1

Views: 153

Answers (1)

Michael Hunger
Michael Hunger

Reputation: 41706

  1. you have to cleanly shut down both the batch-index as well as the batch inserter
  2. you probably don't want to index all properties, just the key ones that you use to look up nodes
  3. you have to enable auto-indexing in the neo4j config for the database you start afterwards, and for the same properties that you indexed during batch-insertion

Upvotes: 1

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