1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2014, Red Hat, Inc. and/or its affiliates, and individual
4 * contributors by the @authors tag. See the copyright.txt in the
5 * distribution for a full listing of individual contributors.
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.jboss.as.quickstarts.greeter.domain;
18
19 import javax.ejb.Stateful;
20 import javax.enterprise.inject.Alternative;
21 import javax.inject.Inject;
22 import javax.persistence.EntityManager;
23 import javax.persistence.NoResultException;
24 import javax.persistence.Query;
25
26 @Stateful
27 @Alternative
28 public class EJBUserDao implements UserDao {
29
30 @Inject
31 private EntityManager entityManager;
32
33 public User getForUsername(String username) {
34 try {
35 Query query = entityManager.createQuery("select u from User u where u.username = ?");
36 query.setParameter(1, username);
37 return (User) query.getSingleResult();
38 } catch (NoResultException e) {
39 return null;
40 }
41 }
42
43 public void createUser(User user) {
44 entityManager.persist(user);
45 }
46
47 }