Hands-On High Performance with Spring 5

Named entity graph

Then named entity graph is a new feature, introduced in JPA 2.1. In this approach, we can define a graph of entities that need to be queried from the database. We can define the entity graph on our entity class by using the @NamedEntityGraph annotation.

The following is an example of how to define a graph using @NamedEntityGraph on the entity class:

@Entity@NamedEntityGraph(name="graph.transactions", attributeNodes= @NamedAttributeNode("transactions"))public class Account implements Serializable {  private static final long serialVersionUID = 1232821417960547743L;  @Id  @GeneratedValue(strategy = GenerationType.AUTO)  @Column(name = "account_id", updatable = false, nullable = false)  private Long accountId; private String name; ...