How would I create this index in Neo4j?

Question

In Titan, I create an index using:

graph.makeKey("name").dataType(String.class).indexed(Vertex.class).indexed(Edge.class).unique().make();

How can I do this in Neo4j using the Java API?

Answer 1

In Cypher you would create a label based constraint on the label :Person and the property name like this.

CREATE CONSTRAINT ON (p:Person) ASSERT p.name IS UNIQUE;

In the Java API it is

try (Transaction tx = db.beginTx()) {      
  db.schema().constraintFor(DynamicLabel.label("Person")).assertPropertyIsUnique("name").create();
  tx.success();
}