ODatabaseDocument - newVertex()

This method creates a new vertex on the database.

Creating Vertices

When using OrientDB to host a Graph database, this method allows you to create vertices on the database. To create new edges, see the newEdge() method.

Syntax

This method comes in three forms. The first creates the vertex in the default OrientDB class V. The others allow you to manually define what class the new vertex belongs to:

// METHOD 1
default OVertex ODatabaseDocument().newVertex()

// METHOD 2
OVertex ODatabaseDocument().newVertex(OClass class)

// METHOD 3
OVertex ODatabaseDocument().newVertex(String class-name)

Return Value

This method returns an OVertex instance. You can call additional methods on this instance to set data to it, then call save() to make that data persistent on OrientDB.

Example

Imagine you have a social networking application. The application stores users under the User class on OrientDB and content sources under the Feed class. Whenever a new user sets up their account, they're automatically subscribed to a series of content sources, which provides news, popular feeds and sponsored results.

To accomplish this, you might use a method to create new user accounts and default subscriptions:

// INITIALIZE DEFAULT VARIABLES
private ODatabaseDocument db;
private List<ORID> defaultFeeds;
...

// CREATE NEW USER
public void newUser(String name, String email){

   // Log Operation
   logger.info("Creating New User");

   // Create New User
   OVertex user = db.newVertex("User");
   user.setProperty("name", name);
   user.setProperty("email", email);
   user.save();

   // Set Default Subscriptions
   for (int i = 0; i < defaultFeeds.size(); i++){

      // Fetch Record ID
	  ORID rid = defaultFeeds.get(i);

      // Fetch Feed Vertex
	  OVertex feed = db.getRecord(rid);

	  // Create and Save Edge
	  OEdge edge = db.newEdge(user, feed);
	  edge.save();

   }
}