JanusGraph: id vs longid

‘id()’ method return the unique identifier of a graph element. longId() method return the unique identifier for this entity. This id can be temporarily assigned and might change. id() for the permanent id.

 

Find the below working application.

 

AddVertex.java

package com.sample.app.vertex;

import java.util.Iterator;
import java.util.Set;

import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.janusgraph.core.JanusGraph;
import org.janusgraph.core.JanusGraphFactory;
import org.janusgraph.core.JanusGraphVertex;

public class AddVertex {

	public static void main(String args[]) {

		JanusGraph janusGraph = JanusGraphFactory.open("/Users/Shared/janus.properties");

		// Create a person vertex
		JanusGraphVertex janusGraphVertex = janusGraph.addVertex("person");

		// Add properties to the vertex
		janusGraphVertex.property("name", "Krishna");
		janusGraphVertex.property("age", 31);
		janusGraphVertex.property("gender", 'M');

		janusGraph.tx().commit();

		Iterator<Vertex> janusGraphVertexes = janusGraph.vertices(janusGraphVertex.id());
		Vertex vertex = janusGraphVertexes.next();

		System.out.println("-----------------------------");
		System.out.println("id : " + vertex.id());
		System.out.println("long id : " + ((JanusGraphVertex) vertex).longId());
		System.out.println("label : " + vertex.label());

		System.out.println("properties");
		Set<String> properties = janusGraphVertex.keys();
		for (String property : properties) {
			System.out.println("\t" + property + " -> " + janusGraphVertex.property(property).value());
		}
		System.out.println("-----------------------------");

		janusGraph.close();
		System.out.println("Done!!!");
	}

}

 

Output

-----------------------------
id : 4184
long id : 4184
label : person
properties
	gender -> M
	name -> Krishna
	age -> 31
-----------------------------
Done!!!

 

 

 

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