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 * @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 }