private IndexOperationMessage handleEdgeIndex(final QueueMessage message) {
Preconditions.checkNotNull(message, "Queue Message cannot be null for handleEdgeIndex");
final AsyncEvent event = (AsyncEvent) message.getBody();
Preconditions.checkNotNull(message, "QueueMessage Body cannot be null for handleEdgeIndex");
Preconditions.checkArgument(
event instanceof EdgeIndexEvent,
String.format(
"Event Type for handleEdgeIndex must be EDGE_INDEX, got %s", event.getClass()));
final EdgeIndexEvent edgeIndexEvent = (EdgeIndexEvent) event;
final EntityCollectionManager ecm =
entityCollectionManagerFactory.createCollectionManager(
edgeIndexEvent.getApplicationScope());
// default this observable's return to empty index operation message if nothing is emitted
return ecm.load(edgeIndexEvent.getEntityId())
.flatMap(
loadedEntity ->
eventBuilder.buildNewEdge(
edgeIndexEvent.getApplicationScope(), loadedEntity, edgeIndexEvent.getEdge()))
.toBlocking()
.lastOrDefault(new IndexOperationMessage());
}
