@Entity
@Table(name="STUDENTS")
public class Student implements Serializable
{
    private static final long serialVersionUID = 4771385985502937621L;

    @TableGenerator(name="TABLE_SEQ")
    @Id @Column(name="ID_STUDENT") @GeneratedValue(generator="TABLE_SEQ")
    private int idStudent;

    private String name;

    public int getIdStudent() {
        return idStudent;
    }

    public void setIdStudent(int idStudent) {
        this.idStudent = idStudent;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name= name;
    }
}

@Stateless(name="EJBStudent")
public class EJBStudent implements EJBStudentRemote
{
    @PersistenceContext(unitName="JPA_Test")
    private EntityManager manager;

    public EJBStudent() {
    }


    @Override
    public void insertStudents() 
    {
        manager.getTransaction().begin();

        Student student1 = new Student();
        student1.setName("Anna");
        manager.persist(student1);

        Student student2 = new Student();
        student2.setName("Paolo");
        manager.persist(student2);

        Student student3 = new Student();
        student3.setName("Luigi");
        manager.persist(student3);

        manager.getTransaction().commit();
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="..." xmlns:xsi="..." xsi:schemaLocation="...">
		
    <persistence-unit name="JPA_Test">		
        <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
        <jta-data-source>java:jboss/datasources/MySqlDS</jta-data-source>
        <class>jpa.test.model.Students</class>
	
        <properties>
            <property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
            <property name="eclipselink.logging.level" value="FINER"/>
            <property name="eclipselink.logging.parameters" value="true" />
            <property name="eclipselink.deploy-on-startup" value="true" />
        </properties>
    </persistence-unit>
</persistence>

select * from SEQUENCE where SEQ_NAME = 'TABLE_SEQ'

@Override
    public void insertStudents() 
    {
        manager.getTransaction().begin();
	Query query = manager.createNativeQuery("select * from SEQUENCE where SEQ_NAME = 'TABLE_SEQ'");
	query.getResultList();

        Student student1 = new Student();
        /* ... code for persist three student ... */

        manager.getTransaction().commit();
    }