Java EE 8 Cookbook

How to do it...

1. We first create a User entity:

@Entity public class User implements Serializable{    @Id    private Long id;    private String name;    private String email;    public User(){            }    public User(Long id, String name, String email) {        this.id = id;        this.name = name;        this.email = email;    }        //DON'T FORGET THE GETTERS AND SETTERS    //THIS RECIPE WON'T WORK WITHOUT THEM}

2. Here, we create a class to store our security roles:

public class Roles {    public static final String ADMIN = "ADMIN";    public static final String OPERATOR = "OPERATOR";}

3. Then, we create a stateful bean to manage our user operations:

@Statefulpublic class UserBean {    @PersistenceContext(unitName = "ch01-security-pu",     type = PersistenceContextType.EXTENDED) private EntityManager ...