Database Reference
In-Depth Information
Likeallwriteoperationsonthegraphdatabase,thecreationofrelationshipsrequiresarun-
ningtransaction. Thefollowing listing showshowyoucancreate the
IS_FRIEND_OF
re-
lationship between the
user
nodes you created earlier.
Listing 3.4. Creating relationships between nodes using the Neo4j Core Java API
Next, we'll identify users in the graph using the
name
property.
3.2.3. Adding properties to nodes
Neo4j is a directed property graph.
Property graph
means that every graph entity can have
a number of properties that describe it. Properties are stored as key-value pairs with the
property name as the key referencing the property value. To illustrate the concept of prop-
erties, we're going to show you how to add the
name
property to the
user
nodes.
To add a property to a node, you need to call the
Node.setProperty(name,
value)
method onthetargetnode.Thenextlisting showshowyoucanusetheCoreJava
API to add names to all the users.
Listing 3.5. Adding name property to user nodes
Nowyouhavearichergraphmodel,wheretheusershavenamesyoucandifferentiatethem
by.
