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17
18 package org.apache.geronimo.persistence;
19
20 import java.util.Map  ;
21
22 import javax.persistence.EntityManager;
23 import javax.persistence.FlushModeType;
24 import javax.persistence.LockModeType;
25 import javax.persistence.Query;
26 import javax.persistence.EntityTransaction;
27 import javax.persistence.EntityManagerFactory;
28 import javax.persistence.TransactionRequiredException;
29 import javax.transaction.Status ;
30
31 import org.apache.geronimo.transaction.manager.TransactionManagerImpl;
32 import org.apache.geronimo.transaction.manager.TransactionImpl;
33
34
37 public class CMPEntityManagerTxScoped implements EntityManager {
38
39 private final TransactionManagerImpl transactionManager;
40 private final String persistenceUnit;
41 private final EntityManagerFactory entityManagerFactory;
42 private final Map entityManagerProperties;
43
44 public CMPEntityManagerTxScoped(TransactionManagerImpl transactionManager, String persistenceUnit, EntityManagerFactory entityManagerFactory, Map entityManagerProperties) {
45 this.transactionManager = transactionManager;
46 this.persistenceUnit = persistenceUnit;
47 this.entityManagerFactory = entityManagerFactory;
48 this.entityManagerProperties = entityManagerProperties;
49 }
50
51 private EntityManager getEntityManager(boolean activeRequired) {
52 TransactionImpl transaction = (TransactionImpl) transactionManager.getTransaction();
53 if (activeRequired && (transaction == null || transaction.getStatus() != Status.STATUS_ACTIVE)) {
54 throw new TransactionRequiredException("No active transaction");
55 }
56 if (transaction == null) {
57 return null;
58 }
59 EntityManagerWrapper entityManagerWrapper = (EntityManagerWrapper) transaction.getEntityManager(persistenceUnit);
60 if (entityManagerWrapper == null) {
61 EntityManager entityManager = createEntityManager();
62 entityManagerWrapper = new EntityManagerWrapperTxScoped(entityManager);
63 transaction.setEntityManager(persistenceUnit, entityManagerWrapper);
64 }
65 return entityManagerWrapper.getEntityManager();
66 }
67
68 private EntityManager createEntityManager() {
69 EntityManager entityManager;
70 if (entityManagerProperties == null) {
71 entityManager = entityManagerFactory.createEntityManager();
72 } else {
73 entityManager = entityManagerFactory.createEntityManager(entityManagerProperties);
74 }
75 return entityManager;
76 }
77
78
79 public void persist(Object o) {
80 EntityManager entityManager = getEntityManager(true);
81 if (entityManager != null) {
82 entityManager.persist(o);
83 } else {
84 entityManager = createEntityManager();
85 try {
86 entityManager.persist(o);
87 } finally {
88 entityManager.close();
89 }
90 }
91 }
92
93 public <T>T merge(T t) {
94 EntityManager entityManager = getEntityManager(true);
95 if (entityManager != null) {
96 return entityManager.merge(t);
97 } else {
98 entityManager = createEntityManager();
99 try {
100 return entityManager.merge(t);
101 } finally {
102 entityManager.close();
103 }
104 }
105 }
106
107 public void remove(Object o) {
108 EntityManager entityManager = getEntityManager(true);
109 if (entityManager != null) {
110 entityManager.remove(o);
111 } else {
112 entityManager = createEntityManager();
113 try {
114 entityManager.remove(o);
115 } finally {
116 entityManager.close();
117 }
118 }
119 }
120
121 public <T>T find(Class <T> aClass, Object o) {
122 EntityManager entityManager = getEntityManager(false);
123 if (entityManager != null) {
124 return entityManager.find(aClass, o);
125 } else {
126 entityManager = createEntityManager();
127 try {
128 return entityManager.find(aClass, o);
129 } finally {
130 entityManager.close();
131 }
132 }
133 }
134
135 public <T>T getReference(Class <T> aClass, Object o) {
136 EntityManager entityManager = getEntityManager(false);
137 if (entityManager != null) {
138 return entityManager.getReference(aClass, o);
139 } else {
140 entityManager = createEntityManager();
141 try {
142 return entityManager.getReference(aClass, o);
143 } finally {
144 entityManager.close();
145 }
146 }
147 }
148
149 public void flush() {
150 EntityManager entityManager = getEntityManager(false);
151 if (entityManager != null) {
152 entityManager.flush();
153 } else {
154 entityManager = createEntityManager();
155 try {
156 entityManager.flush();
157 } finally {
158 entityManager.close();
159 }
160 }
161 }
162
163 public void setFlushMode(FlushModeType flushModeType) {
164 EntityManager entityManager = getEntityManager(false);
165 if (entityManager != null) {
166 entityManager.setFlushMode(flushModeType);
167 } else {
168 entityManager = createEntityManager();
169 try {
170 entityManager.setFlushMode(flushModeType);
171 } finally {
172 entityManager.close();
173 }
174 }
175 }
176
177 public FlushModeType getFlushMode() {
178 EntityManager entityManager = getEntityManager(false);
179 if (entityManager != null) {
180 return entityManager.getFlushMode();
181 } else {
182 entityManager = createEntityManager();
183 try {
184 return entityManager.getFlushMode();
185 } finally {
186 entityManager.close();
187 }
188 }
189 }
190
191 public void lock(Object o, LockModeType lockModeType) {
192 EntityManager entityManager = getEntityManager(false);
193 if (entityManager != null) {
194 entityManager.lock(o, lockModeType);
195 } else {
196 entityManager = createEntityManager();
197 try {
198 entityManager.lock(o, lockModeType);
199 } finally {
200 entityManager.close();
201 }
202 }
203 }
204
205 public void refresh(Object o) {
206 EntityManager entityManager = getEntityManager(true);
207 if (entityManager != null) {
208 entityManager.refresh(o);
209 } else {
210 entityManager = createEntityManager();
211 try {
212 entityManager.refresh(o);
213 } finally {
214 entityManager.close();
215 }
216 }
217 }
218
219 public void clear() {
220 EntityManager entityManager = getEntityManager(false);
221 if (entityManager != null) {
222 entityManager.clear();
223 } else {
224 entityManager = createEntityManager();
225 try {
226 entityManager.clear();
227 } finally {
228 entityManager.close();
229 }
230 }
231 }
232
233 public boolean contains(Object o) {
234 EntityManager entityManager = getEntityManager(false);
235 if (entityManager != null) {
236 return entityManager.contains(o);
237 } else {
238 entityManager = createEntityManager();
239 try {
240 return entityManager.contains(o);
241 } finally {
242 entityManager.close();
243 }
244 }
245 }
246
247 public Query createQuery(String s) {
248 EntityManager entityManager = getEntityManager(false);
249 if (entityManager != null) {
250 return entityManager.createQuery(s);
251 } else {
252 entityManager = createEntityManager();
253 try {
254 return entityManager.createQuery(s);
255 } finally {
256 entityManager.close();
257 }
258 }
259 }
260
261 public Query createNamedQuery(String s) {
262 EntityManager entityManager = getEntityManager(false);
263 if (entityManager != null) {
264 return entityManager.createNamedQuery(s);
265 } else {
266 entityManager = createEntityManager();
267 try {
268 return entityManager.createNamedQuery(s);
269 } finally {
270 entityManager.close();
271 }
272 }
273 }
274
275 public Query createNativeQuery(String s) {
276 EntityManager entityManager = getEntityManager(false);
277 if (entityManager != null) {
278 return entityManager.createNativeQuery(s);
279 } else {
280 entityManager = createEntityManager();
281 try {
282 return entityManager.createNativeQuery(s);
283 } finally {
284 entityManager.close();
285 }
286 }
287 }
288
289 public Query createNativeQuery(String s, Class aClass) {
290 EntityManager entityManager = getEntityManager(false);
291 if (entityManager != null) {
292 return entityManager.createNativeQuery(s, aClass);
293 } else {
294 entityManager = createEntityManager();
295 try {
296 return entityManager.createNativeQuery(s, aClass);
297 } finally {
298 entityManager.close();
299 }
300 }
301 }
302
303 public Query createNativeQuery(String s, String s1) {
304 EntityManager entityManager = getEntityManager(false);
305 if (entityManager != null) {
306 return entityManager.createNativeQuery(s, s1);
307 } else {
308 entityManager = createEntityManager();
309 try {
310 return entityManager.createNativeQuery(s, s1);
311 } finally {
312 entityManager.close();
313 }
314 }
315 }
316
317 public void close() {
318 throw new IllegalStateException ("You cannot call close on a Container Managed Entity Manager");
319 }
320
321 public boolean isOpen() {
322 return true;
323 }
324
325 public EntityTransaction getTransaction() {
326 throw new IllegalStateException ("You cannot call getTransaction on a container managed EntityManager");
327 }
328
329 public void joinTransaction() {
330 throw new IllegalStateException ("You cannot call joinTransaction on a container managed EntityManager");
331 }
332
333 public Object getDelegate() {
334 EntityManager entityManager = getEntityManager(false);
335 if (entityManager != null) {
336 return entityManager.getDelegate();
337 } else {
338 entityManager = createEntityManager();
339 try {
340 return entityManager.getDelegate();
341 } finally {
342 entityManager.close();
343 }
344 }
345 }
346
347 private static class EntityManagerWrapperTxScoped implements EntityManagerWrapper {
348 private final EntityManager entityManager;
349
350 public EntityManagerWrapperTxScoped(EntityManager entityManager) {
351 if (entityManager == null) {
352 throw new IllegalArgumentException ("Need a non-null entity manager");
353 }
354 this.entityManager = entityManager;
355 }
356
357 public void close() {
358 entityManager.close();
359 }
360
361 public EntityManager getEntityManager() {
362 return entityManager;
363 }
364 }
365 }
366 |
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