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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.tasks;
18  
19  import javax.ejb.Stateful;
20  import javax.enterprise.context.RequestScoped;
21  import javax.enterprise.inject.Produces;
22  import javax.persistence.EntityManager;
23  import javax.persistence.PersistenceContext;
24  import javax.persistence.PersistenceContextType;
25  
26  /**
27   * This class uses CDI to alias Java EE resources, such as the persistence context, to CDI beans. As it is a stateful bean, it
28   * can produce extended persistence contexts.
29   * 
30   * <p>
31   * Example injection on a managed bean field:
32   * </p>
33   * 
34   * <pre>
35   * &#064;Inject
36   * private EntityManager em;
37   * </pre>
38   */
39  @Stateful
40  @RequestScoped
41  public class Resources {
42  
43      @PersistenceContext(type = PersistenceContextType.EXTENDED)
44      private EntityManager em;
45  
46      @Produces
47      public EntityManager getEm() {
48          return em;
49      }
50  
51  }