Applying It All: The Mega App - JSF and HTML5 - page 329

The methods of UserManager EJB are as follows:

getMegaUser : Retrieves the user information. It throws UserNotFound exception if the target
user is not found.

•

registerMegaUser : Registers the Mega App user in the Mega App database as an application
user (i.e., it makes the user a member in the "User" group). It throws UserAlreadyExists
exception if the user ID already exists in the database.

•

removeMegaUser : Removes the Mega App user from the database. It throws UserNotFound
exception if the target user is not found.

•

retrieveMegaUsers : Retrieves all the users of the Mega App (whether they are normal users or
administrator users).

•

Let's check the details of MegaUser JPA entity, which holds the User attributes and its associated validation
constraints. Listing 13-9 shows MegaUser JPA entity class.

Listing 13-9. MegaUser JPA Entity Class

package com.jsfprohtml5.megaapp.model;

import java.io.Serializable;
import java.util.List;
import javax.persistence.Basic;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.Transient;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;

@Entity
@Table(name = "MEGA_USER")
public class MegaUser implements Serializable {
private static final long serialVersionUID = 109890766546456L;
@Id
@Basic(optional = false)
@Size(min = 3, max = 64, message = "ID must be between 3 and 64 characters")
@Column(name = "ID")
private String id;
@Basic(optional = false)
@NotNull
@Size(min = 3, max = 32, message = "First name must be between 3 and 32 characters")
@Column(name = "FIRST_NAME")
private String firstName;