在apache felix框架实现中使用Jpa

<dependency>
    <groupId>javax.persistence</groupId>
    <artifactId>javax.persistence-api</artifactId>
    <version>2.2</version>
</dependency>
<dependency>
    <groupId>org.apache.felix</groupId>
    <artifactId>org.apache.felix.framework</artifactId>
    <version>6.0.3</version>
</dependency>

@Entity
@Table(name = "user")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "name")
    private String name;

    // 省略其他属性和方法
}

javax.persistence.jdbc.driver=org.h2.Driver
javax.persistence.jdbc.url=jdbc:h2:mem:test;DB_CLOSE_DELAY=-1
javax.persistence.jdbc.user=sa
javax.persistence.jdbc.password=

@Reference
private EntityManagerFactory emf;

public void addUser(User user) {
    EntityManager em = emf.createEntityManager();
    EntityTransaction tx = em.getTransaction();
    try {
        tx.begin();
        em.persist(user);
        tx.commit();
    } catch (Exception e) {
        if (tx != null && tx.isActive()) {
            tx.rollback();
        }
    } finally {
        em.close();
    }
}