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Given an EntityManager, em, that represents a JPA connection to the object database, we can use it to store, retrieve, update and delete database objects. Storing New Entity Objects

This chapter explains how to manage ObjectDB databases using the Java Persistence API (JPA). The first two pages introduce basic JPA interfaces and concepts: Connection|Managed Entity Objects">

connection with its distribution of the Program in a commercial product offering. The obligations in

/report/birt/datasource1.png"> Specify an ObjectDB connection URL - either embedded

method (preferred over JUnit). Use embedded mode to connect

on which the server listens for new connections is also specified in the

.persistence.TypedQuery; @Stateless public class GuestDao { // Injected database connection

GuestDao { // Injected database connection: @PersistenceContext private EntityManager em

; @Component public class GuestDao { // Injected database connection: @PersistenceContext

; @Stateless public class GuestDao { // Injected database connection: @PersistenceContext