1 /* 2 * Copyright (C) 2010 Google, Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.inject.persist.jpa; 18 19 import com.google.inject.Guice; 20 import com.google.inject.Inject; 21 import com.google.inject.Injector; 22 import com.google.inject.persist.PersistService; 23 import com.google.inject.persist.Transactional; 24 import com.google.inject.persist.UnitOfWork; 25 import javax.persistence.EntityManager; 26 import javax.persistence.EntityManagerFactory; 27 import junit.framework.TestCase; 28 29 /** 30 * A test around providing sessions (starting, closing etc.) 31 * 32 * @author Dhanji R. Prasanna (dhanji@gmail.com) 33 */ 34 35 public class EntityManagerPerRequestProvisionTest extends TestCase { 36 private Injector injector; 37 38 @Override setUp()39 public void setUp() { 40 injector = Guice.createInjector(new JpaPersistModule("testUnit")); 41 42 //startup persistence 43 injector.getInstance(PersistService.class).start(); 44 45 injector.getInstance(UnitOfWork.class).begin(); 46 } 47 48 @Override tearDown()49 public final void tearDown() { 50 injector.getInstance(UnitOfWork.class).end(); 51 injector.getInstance(EntityManagerFactory.class).close(); 52 } 53 testEntityManagerLifecyclePerTxn()54 public void testEntityManagerLifecyclePerTxn() { 55 //obtain em 56 JpaDao dao = injector.getInstance(JpaDao.class); 57 58 //obtain same em again (bound to txn) 59 JpaTestEntity te = new JpaTestEntity(); 60 61 dao.persist(te); 62 63 //im not sure this hack works... 64 assertEquals( 65 "Entity managers closed inside same thread-scope", 66 injector.getInstance(EntityManager.class), 67 JpaDao.em); 68 69 //try to start a new em in a new txn 70 dao = injector.getInstance(JpaDao.class); 71 72 assertTrue( 73 "EntityManager was closed and reopened around txn" 74 + " (persistent object does not persist)", 75 dao.contains(te)); 76 } 77 testEntityManagerLifecyclePerTxn2()78 public void testEntityManagerLifecyclePerTxn2() { 79 //obtain em 80 JpaDao dao = injector.getInstance(JpaDao.class); 81 82 //obtain same em again (bound to txn) 83 JpaTestEntity te = new JpaTestEntity(); 84 85 dao.persist(te); 86 87 //im not sure this hack works... 88 assertEquals( 89 "Duplicate entity managers crossing-scope", 90 injector.getInstance(EntityManager.class), 91 JpaDao.em); 92 assertEquals( 93 "Duplicate entity managers crossing-scope", 94 injector.getInstance(EntityManager.class), 95 JpaDao.em); 96 97 //try to start a new em in a new txn 98 dao = injector.getInstance(JpaDao.class); 99 100 assertTrue( 101 "EntityManager was closed and reopened around txn" + " (persistent object doesnt persist)", 102 dao.contains(te)); 103 } 104 105 public static class JpaDao { 106 static EntityManager em; 107 108 @Inject JpaDao(EntityManager em)109 public JpaDao(EntityManager em) { 110 JpaDao.em = em; 111 } 112 113 @Transactional persist(T t)114 public <T> void persist(T t) { 115 assertTrue("em is not open!", em.isOpen()); 116 assertTrue("no active txn!", em.getTransaction().isActive()); 117 em.persist(t); 118 119 assertTrue("Persisting object failed", em.contains(t)); 120 } 121 122 @Transactional contains(T t)123 public <T> boolean contains(T t) { 124 return em.contains(t); 125 } 126 } 127 } 128