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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.tasksrs.model;
18  
19  import java.util.logging.Logger;
20  
21  import javax.ejb.Stateful;
22  import javax.enterprise.context.RequestScoped;
23  import javax.enterprise.inject.Produces;
24  import javax.enterprise.inject.spi.InjectionPoint;
25  import javax.persistence.EntityManager;
26  import javax.persistence.PersistenceContext;
27  import javax.persistence.PersistenceContextType;
28  
29  /**
30   * This class uses CDI to alias Java EE resources, such as the persistence context, to CDI beans. As it is a stateful bean, it
31   * can produce extended persistence contexts.
32   *
33   * Example injection on a managed bean field:
34   *
35   * @Inject private EntityManager em;
36   *
37   * @author Pete Muir
38   * @author Lukas Fryc
39   *
40   */
41  @Stateful
42  @RequestScoped
43  public class Resources {
44  
45      @PersistenceContext(type = PersistenceContextType.EXTENDED)
46      private EntityManager em;
47  
48      @Produces
49      public EntityManager getEm() {
50          return em;
51      }
52  
53      @Produces
54      public Logger getLogger(InjectionPoint ip) {
55          String category = ip.getMember().getDeclaringClass().getName();
56          return Logger.getLogger(category);
57      }
58  }