Source: EBJ Design Pattern

• Presentation: JSF, JScript…
• Application: UI workflow, Validation, Servlet, Userbean..
• Service: biz logic (EJB Session Bean)
• Domain: domain logic, EntityBeans.
• Persistence: DB, ORM.

1. Domain
2. Persistence
3. Service
4. Client –> last.

DAO, SLSB

Backing Beans for JSFview.

JPA Models, Entity Beans.

EJB Beans.

Specifies Injection points for the EM.

• Design Entity Relationship using Dia…
• Use workbench to generate Model and SQL Schemas.

package de.td.inhanoi.model;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
import javax.validation.constraints.Digits;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Pattern;
import javax.validation.constraints.Size;
import javax.xml.bind.annotation.XmlRootElement;

import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.NotEmpty;

@Entity
@XmlRootElement
@Table(uniqueConstraints = @UniqueConstraint(columnNames = "email"))
public class Member implements Serializable {
   /** Default value included to remove warning. Remove or modify at will. **/
   private static final long serialVersionUID = 1L;

   @Id
   @GeneratedValue
   private Long id;

   @NotNull
   @Size(min = 1, max = 25)
   @Pattern(regexp = "[A-Za-z ]*", message = "must contain only letters and spaces")
   private String name;

   @NotNull
   @NotEmpty
   @Email
   private String email;

   @NotNull
   @Size(min = 10, max = 12)
   @Digits(fraction = 0, integer = 12)
   @Column(name = "phone_number")
   private String phoneNumber;

   public Long getId() {
      return id;
   }

   public void setId(Long id) {
      this.id = id;
   }

   public String getName() {
      return name;
   }

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

   public String getEmail() {
      return email;
   }

   public void setEmail(String email) {
      this.email = email;
   }

   public String getPhoneNumber() {
      return phoneNumber;
   }

   public void setPhoneNumber(String phoneNumber) {
      this.phoneNumber = phoneNumber;
   }
}

package de.td.inhanoi.controller;

import java.util.logging.Logger;

import javax.annotation.PostConstruct;
import javax.ejb.Stateful;
import javax.enterprise.event.Event;
import javax.enterprise.inject.Model;
import javax.enterprise.inject.Produces;
import javax.inject.Inject;
import javax.inject.Named;
import javax.persistence.EntityManager;

import de.td.inhanoi.model.Member;

// The @Stateful annotation eliminates the need for manual transaction demarcation
@Stateful
// The @Model stereotype is a convenience mechanism to make this a request-scoped bean that has an
// EL name
// Read more about the @Model stereotype in this FAQ:
// http://sfwk.org/Documentation/WhatIsThePurposeOfTheModelAnnotation
@Model
public class MemberRegistration {

   @Inject
   private Logger log;

   @Inject
   private EntityManager em;

   @Inject
   private Event<Member> memberEventSrc;

   private Member newMember;

   @Produces
   @Named
   public Member getNewMember() {
      return newMember;
   }

   public void register() throws Exception {
      log.info("Registering " + newMember.getName());
      em.persist(newMember);
      memberEventSrc.fire(newMember);
      initNewMember();
   }

   @PostConstruct
   public void initNewMember() {
      newMember = new Member();
   }
}

package de.td.inhanoi.data;

import de.td.inhanoi.model.Member;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.enterprise.context.RequestScoped;
import javax.enterprise.event.Observes;
import javax.enterprise.event.Reception;

import javax.enterprise.inject.Produces;
import javax.inject.Inject;
import javax.inject.Named;
import javax.persistence.EntityManager;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;

@RequestScoped
public class MemberListProducer {
   @Inject
   private EntityManager em;

   private List<Member> members;

   // @Named provides access the return value via the EL variable name "members" in the UI (e.g.,
   // Facelets or JSP view)
   @Produces
   @Named
   public List<Member> getMembers() {
      return members;
   }

   public void onMemberListChanged(@Observes(notifyObserver = Reception.IF_EXISTS) final Member member) {
      retrieveAllMembersOrderedByName();
   }

   @PostConstruct
   public void retrieveAllMembersOrderedByName() {
      CriteriaBuilder cb = em.getCriteriaBuilder();
      CriteriaQuery<Member> criteria = cb.createQuery(Member.class);
      Root<Member> member = criteria.from(Member.class);
      // Swap criteria statements if you would like to try out type-safe criteria queries, a new
      // feature in JPA 2.0
      // criteria.select(member).orderBy(cb.asc(member.get(Member_.name)));
      criteria.select(member).orderBy(cb.asc(member.get("name")));
      members = em.createQuery(criteria).getResultList();
   }
}

package de.td.inhanoi.util;

import java.util.logging.Logger;

import javax.enterprise.inject.Produces;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

/**
 * This class uses CDI to alias Java EE resources, such as the persistence context, to CDI beans
 * 
 * <p>
 * Example injection on a managed bean field:
 * </p>
 * 
 * <pre>
 * &#064;Inject
 * private EntityManager em;
 * </pre>
 */
public class Resources {
   // use @SuppressWarnings to tell IDE to ignore warnings about field not being referenced directly
   @SuppressWarnings("unused")
   @Produces
   @PersistenceContext
   private EntityManager em;
   
   @Produces
   public Logger produceLog(InjectionPoint injectionPoint) {
      return Logger.getLogger(injectionPoint.getMember().getDeclaringClass().getName());
   }
}

http://www.amazon.com/dp/1430219548/?tag=stackoverfl08-20

http://www.coreservlets.com/

http://www.adam-bien.com/roller/abien/entry/simplest_possible_jsf_2_ejb