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17 package org.jboss.as.quickstarts.kitchensinkjsp.data;
18
19 import org.jboss.as.quickstarts.kitchensinkjsp.model.Member;
20 import java.util.List;
21 import javax.annotation.PostConstruct;
22 import javax.enterprise.context.RequestScoped;
23 import javax.enterprise.event.Observes;
24 import javax.enterprise.event.Reception;
25
26 import javax.enterprise.inject.Produces;
27 import javax.inject.Inject;
28 import javax.inject.Named;
29 import javax.persistence.EntityManager;
30 import javax.persistence.criteria.CriteriaBuilder;
31 import javax.persistence.criteria.CriteriaQuery;
32 import javax.persistence.criteria.Root;
33
34 @RequestScoped
35 public class MemberListProducer {
36 @Inject
37 private EntityManager em;
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39 private List<Member> members;
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43 @Produces
44 @Named
45 public List<Member> getMembers() {
46 return members;
47 }
48
49 public void onMemberListChanged(@Observes(notifyObserver = Reception.IF_EXISTS) final Member member) {
50 retrieveAllMembersOrderedByName();
51 }
52
53 @PostConstruct
54 public void retrieveAllMembersOrderedByName() {
55 CriteriaBuilder cb = em.getCriteriaBuilder();
56 CriteriaQuery<Member> criteria = cb.createQuery(Member.class);
57 Root<Member> member = criteria.from(Member.class);
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61 criteria.select(member).orderBy(cb.asc(member.get("name")));
62 members = em.createQuery(criteria).getResultList();
63 }
64 }