Hi,
I am using BatchInserterIndex to ingest a large amount of data to Neo4j DB.
I intend to add nodes to a TimelineIndex (Lucene) during the batch. Now, in
the normal way, TimelineIndex takes (node, long) to add in the index. It
probably is using the key 'timestamp' internally. (Checked in
LuceneTimeline.java in github)
My problem is that I'm able to insert nodes into the TL index but not able
to retrieve them using the regular java API. It always returns
timelineIndex.getFirst() as null.
I have initialized the indices as below.
*Regular Way Of Access*
TimelineIndex<Node> timelineIndex = new LuceneTimeline<Node>(graphDB,
indexMgr.forNodes("airing-timeline")); //graphDb initialised properly
earlier.
timelineIndex.add(node, 1234560000L);
*Batch Ingestion*
BatchInserterIndex timelineIndex =
indexProvider.nodeIndex("airing-timeline", MapUtil.stringMap("type",
"exact")); //Initialised just like regular way
Map<String, Object> timelineIndexPropertiesMap = new HashMap<String,
Object>();
timelineIndexPropertiesMap.put("timestamp", 1234560000L); //Checked the
code of LuceneTimeline.java and found this internal property for timeline
timelineIndex.query("*:*").size(); // return 0 (zero)
timelineIndex.add(airing_node_id, timelineIndexPropertiesMap);
timelineIndex.query("*:*").size(); // return 1 (one)
<database flushed and closed after this>
Now, when I'm trying to use, timelineIndex.getFirst() to retrieve data
added by Batch Inserter, it always returns me null.
But, nodes added in the regular way on the SAME DB return me proper values.
Where am I going wrong?
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