Source Code Cross Referenced for SourceNode.java in  » Content-Management-System » apache-lenya-2.0 » org » apache » lenya » cms » repository » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Content Management System » apache lenya 2.0 » org.apache.lenya.cms.repository 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         *  contributor license agreements.  See the NOTICE file distributed with
004:         *  this work for additional information regarding copyright ownership.
005:         *  The ASF licenses this file to You under the Apache License, Version 2.0
006:         *  (the "License"); you may not use this file except in compliance with
007:         *  the License.  You may obtain a copy of the License at
008:         *
009:         *      http://www.apache.org/licenses/LICENSE-2.0
010:         *
011:         *  Unless required by applicable law or agreed to in writing, software
012:         *  distributed under the License is distributed on an "AS IS" BASIS,
013:         *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         *  See the License for the specific language governing permissions and
015:         *  limitations under the License.
016:         *
017:         */
018:        package org.apache.lenya.cms.repository;
019:
020:        import java.io.InputStream;
021:        import java.io.OutputStream;
022:        import java.util.Collection;
023:
024:        import org.apache.avalon.framework.logger.AbstractLogEnabled;
025:        import org.apache.avalon.framework.logger.Logger;
026:        import org.apache.avalon.framework.service.ServiceException;
027:        import org.apache.avalon.framework.service.ServiceManager;
028:        import org.apache.excalibur.source.SourceResolver;
029:        import org.apache.excalibur.source.TraversableSource;
030:        import org.apache.lenya.ac.Identity;
031:        import org.apache.lenya.ac.User;
032:        import org.apache.lenya.cms.metadata.MetaData;
033:        import org.apache.lenya.cms.metadata.MetaDataException;
034:        import org.apache.lenya.cms.observation.DocumentEvent;
035:        import org.apache.lenya.cms.observation.RepositoryEvent;
036:        import org.apache.lenya.cms.observation.RepositoryEventFactory;
037:        import org.apache.lenya.cms.rc.CheckInEntry;
038:        import org.apache.lenya.cms.rc.RCML;
039:        import org.apache.lenya.cms.rc.RevisionControlException;
040:        import org.apache.lenya.transaction.Lock;
041:        import org.apache.lenya.transaction.TransactionException;
042:        import org.apache.lenya.transaction.Transactionable;
043:
044:        /**
045:         * A repository node.
046:         * 
047:         * @version $Id: SourceNode.java 575297 2007-09-13 12:50:13Z andreas $
048:         */
049:        public class SourceNode extends AbstractLogEnabled implements  Node,
050:                Transactionable {
051:
052:            protected ServiceManager manager;
053:
054:            private ContentSourceWrapper contentSource;
055:            private MetaSourceWrapper metaSource;
056:
057:            /**
058:             * Ctor.
059:             * 
060:             * @param session
061:             * @param sourceUri
062:             * @param manager
063:             * @param logger
064:             */
065:            public SourceNode(Session session, String sourceUri,
066:                    ServiceManager manager, Logger logger) {
067:                this .manager = manager;
068:                enableLogging(logger);
069:                this .session = session;
070:
071:                this .contentSource = new ContentSourceWrapper(this , sourceUri,
072:                        manager, logger);
073:                this .metaSource = new MetaSourceWrapper(this , sourceUri,
074:                        manager, logger);
075:            }
076:
077:            protected ContentSourceWrapper getContentSource() {
078:                return this .contentSource;
079:            }
080:
081:            protected MetaSourceWrapper getMetaSource() {
082:                return this .metaSource;
083:            }
084:
085:            /**
086:             * @see org.apache.lenya.transaction.Transactionable#deleteTransactionable()
087:             */
088:            public void deleteTransactionable() throws RepositoryException {
089:                this .contentSource.deleteTransactionable();
090:                this .metaSource.deleteTransactionable();
091:                getRcml().delete();
092:            }
093:
094:            protected String getUserId() {
095:                String userId = null;
096:                Identity identity = getSession().getIdentity();
097:                if (identity != null) {
098:                    User user = identity.getUser();
099:                    if (user != null) {
100:                        userId = user.getId();
101:                    }
102:                }
103:                return userId;
104:            }
105:
106:            /**
107:             * @see org.apache.lenya.transaction.Transactionable#checkin()
108:             */
109:            public void checkin() throws RepositoryException {
110:                RCML rcml = getRcml();
111:                synchronized (rcml) {
112:                    try {
113:                        if (!rcml.isCheckedOutBySession(getSession())) {
114:                            throw new RepositoryException(
115:                                    "Cannot check in node ["
116:                                            + getSourceURI()
117:                                            + "]: not checked out by this session!");
118:                        }
119:                        rcml
120:                                .checkIn(this , exists(), getSession().isDirty(
121:                                        this ));
122:                    } catch (Exception e) {
123:                        throw new RepositoryException(e);
124:                    }
125:                }
126:            }
127:
128:            public void forceCheckIn() throws RepositoryException {
129:                RCML rcml = getRcml();
130:                synchronized (rcml) {
131:                    try {
132:                        if (!rcml.isCheckedOut()) {
133:                            throw new RepositoryException(
134:                                    "Cannot check in node [" + getSourceURI()
135:                                            + "]: not checked out!");
136:                        }
137:                        rcml.checkIn(this , false, false);
138:                    } catch (Exception e) {
139:                        throw new RepositoryException(e);
140:                    }
141:                }
142:            }
143:
144:            /**
145:             * @see org.apache.lenya.transaction.Transactionable#isCheckedOut()
146:             */
147:            public boolean isCheckedOut() throws RepositoryException {
148:                try {
149:                    return getRcml().isCheckedOut();
150:                } catch (Exception e) {
151:                    throw new RepositoryException(e);
152:                }
153:            }
154:
155:            public boolean isCheckedOutBySession(Session session)
156:                    throws RepositoryException {
157:                try {
158:                    return getRcml().isCheckedOutBySession(session);
159:                } catch (RevisionControlException e) {
160:                    throw new RepositoryException(e);
161:                }
162:            }
163:
164:            public void checkout(boolean restrictedToSession)
165:                    throws RepositoryException {
166:
167:                if (getLogger().isDebugEnabled())
168:                    getLogger().debug(
169:                            "SourceNode::checkout() called, sourceURI ["
170:                                    + getSourceURI() + "]");
171:
172:                RCML rcml = getRcml();
173:                synchronized (rcml) {
174:                    try {
175:                        if (rcml.isCheckedOut()
176:                                && !rcml.isCheckedOutBySession(getSession())) {
177:                            throw new RepositoryException(
178:                                    "The node ["
179:                                            + this 
180:                                            + "] is already checked out by another session!");
181:                        }
182:                        if (!rcml.isCheckedOut()) {
183:                            rcml.checkOut(this , restrictedToSession);
184:                        }
185:                    } catch (RevisionControlException e) {
186:                        throw new RepositoryException(e);
187:                    }
188:                }
189:            }
190:
191:            public void checkout() throws RepositoryException {
192:                checkout(true);
193:            }
194:
195:            private Lock lock;
196:
197:            /**
198:             * @see org.apache.lenya.transaction.Transactionable#hasChanged()
199:             */
200:            public boolean hasChanged() throws RepositoryException {
201:                try {
202:                    int currentVersion = getCurrentRevisionNumber();
203:                    int lockVersion = getLock().getVersion();
204:                    return currentVersion > lockVersion;
205:                } catch (Exception e) {
206:                    throw new RepositoryException(e);
207:                }
208:            }
209:
210:            protected int getCurrentRevisionNumber() throws RepositoryException {
211:                CheckInEntry entry;
212:                try {
213:                    entry = getRcml().getLatestCheckInEntry();
214:                } catch (RevisionControlException e) {
215:                    throw new RepositoryException(e);
216:                }
217:                if (entry == null) {
218:                    return 0;
219:                } else {
220:                    return entry.getVersion();
221:                }
222:            }
223:
224:            /**
225:             * @return The document node, if this is a meta data node, or the node itself otherwise.
226:             * @throws ServiceException
227:             * @throws RepositoryException
228:             */
229:            protected Node getDocumentNode() throws ServiceException,
230:                    RepositoryException {
231:                Node node;
232:                String sourceUri = getSourceURI();
233:                if (sourceUri.endsWith(".meta")) {
234:                    String documentSourceUri = sourceUri.substring(0, sourceUri
235:                            .length()
236:                            - ".meta".length());
237:                    NodeFactory factory = null;
238:                    try {
239:                        factory = (NodeFactory) this .manager
240:                                .lookup(NodeFactory.ROLE);
241:                        node = (Node) factory.buildItem(getSession(),
242:                                documentSourceUri);
243:                    } finally {
244:                        if (factory != null) {
245:                            this .manager.release(factory);
246:                        }
247:                    }
248:                } else {
249:                    node = this ;
250:                }
251:                return node;
252:            }
253:
254:            /**
255:             * @see org.apache.lenya.transaction.Transactionable#createTransactionable()
256:             */
257:            public void createTransactionable() throws RepositoryException {
258:            }
259:
260:            /**
261:             * @see org.apache.lenya.transaction.Transactionable#lock()
262:             */
263:            public synchronized void lock() throws RepositoryException {
264:                if (getLogger().isDebugEnabled()) {
265:                    getLogger().debug("Locking [" + this  + "]");
266:                }
267:                try {
268:                    int currentRev = getCurrentRevisionNumber();
269:                    int contentLoadRev = getContentSource().getLoadRevision();
270:                    int contentRev = contentLoadRev == -1 ? currentRev
271:                            : contentLoadRev;
272:
273:                    int metaLoadRev = getMetaSource().getLoadRevision();
274:                    int metaRev = metaLoadRev == -1 ? currentRev : metaLoadRev;
275:
276:                    int lockRev = Math.min(contentRev, metaRev);
277:                    this .lock = getSession().createLock(this , lockRev);
278:                } catch (TransactionException e) {
279:                    throw new RepositoryException(e);
280:                }
281:
282:            }
283:
284:            /**
285:             * @see org.apache.lenya.transaction.Transactionable#getLock()
286:             */
287:            public Lock getLock() {
288:                return this .lock;
289:            }
290:
291:            /**
292:             * @see org.apache.lenya.transaction.Transactionable#unlock()
293:             */
294:            public void unlock() throws RepositoryException {
295:                this .lock = null;
296:                try {
297:                    getSession().removeLock(this );
298:                } catch (TransactionException e) {
299:                    throw new RepositoryException(e);
300:                }
301:            }
302:
303:            /**
304:             * @see org.apache.lenya.transaction.Transactionable#isLocked()
305:             */
306:            public boolean isLocked() throws RepositoryException {
307:                return this .lock != null;
308:            }
309:
310:            /**
311:             * @see java.lang.Object#toString()
312:             */
313:            public String toString() {
314:                return "node " + getSourceURI();
315:            }
316:
317:            /**
318:             * 
319:             */
320:            public Collection getChildren() throws RepositoryException {
321:                SourceResolver resolver = null;
322:                TraversableSource source = null;
323:                try {
324:                    resolver = (SourceResolver) this .manager
325:                            .lookup(SourceResolver.ROLE);
326:                    source = (TraversableSource) resolver
327:                            .resolveURI(this .contentSource.getRealSourceUri());
328:                    Collection children = source.getChildren();
329:                    java.util.Iterator iterator = children.iterator();
330:                    java.util.Vector newChildren = new java.util.Vector();
331:                    while (iterator.hasNext()) {
332:                        TraversableSource child = (TraversableSource) iterator
333:                                .next();
334:                        newChildren.add(new SourceNode(getSession(),
335:                                getSourceURI() + "/" + child.getName(),
336:                                this .manager, getLogger()));
337:                    }
338:                    return newChildren;
339:                } catch (Exception e) {
340:                    throw new RepositoryException(e);
341:                }
342:            }
343:
344:            /**
345:             * 
346:             */
347:            public boolean isCollection() throws RepositoryException {
348:                SourceResolver resolver = null;
349:                TraversableSource source = null;
350:                try {
351:                    resolver = (SourceResolver) this .manager
352:                            .lookup(SourceResolver.ROLE);
353:                    source = (TraversableSource) resolver
354:                            .resolveURI(this .contentSource.getRealSourceUri());
355:                    return source.isCollection();
356:                } catch (Exception e) {
357:                    throw new RepositoryException(e);
358:                }
359:            }
360:
361:            /**
362:             * @see org.apache.lenya.cms.repository.Node#getSourceURI()
363:             */
364:            public String getSourceURI() {
365:                return this .contentSource.getSourceUri();
366:            }
367:
368:            private Session session;
369:
370:            /**
371:             * @see org.apache.lenya.cms.repository.Node#getSession()
372:             */
373:            public Session getSession() {
374:                return this .session;
375:            }
376:
377:            public void registerDirty() throws RepositoryException {
378:                try {
379:                    if (!getSession().isDirty(this )) {
380:                        getSession().registerDirty(this );
381:                        enqueueEvent(DocumentEvent.CHANGED);
382:                    }
383:                } catch (TransactionException e) {
384:                    throw new RepositoryException(e);
385:                }
386:            }
387:
388:            protected void enqueueEvent(Object descriptor) {
389:                RepositoryEvent event = RepositoryEventFactory.createEvent(
390:                        this .manager, this , getLogger(), descriptor);
391:                getSession().enqueueEvent(event);
392:            }
393:
394:            public void registerRemoved() throws RepositoryException {
395:                try {
396:                    getSession().registerRemoved(this );
397:                    enqueueEvent(DocumentEvent.REMOVED);
398:                } catch (Exception e) {
399:                    throw new RepositoryException(e);
400:                }
401:            }
402:
403:            private RCML rcml;
404:            private Persistable persistable;
405:
406:            protected synchronized RCML getRcml() {
407:                if (this .rcml == null) {
408:                    SourceNodeRcmlFactory factory = SourceNodeRcmlFactory
409:                            .getInstance();
410:                    this .rcml = factory.getRcml(this , this .manager);
411:                }
412:                return this .rcml;
413:            }
414:
415:            public History getHistory() {
416:                return new SourceNodeHistory(this , this .manager, getLogger());
417:            }
418:
419:            public MetaData getMetaData(String namespaceUri)
420:                    throws MetaDataException {
421:                return this .metaSource.getMetaData(namespaceUri);
422:            }
423:
424:            public boolean exists() throws RepositoryException {
425:                return this .contentSource.exists();
426:            }
427:
428:            public OutputStream getOutputStream() throws RepositoryException {
429:                return this .contentSource.getOutputStream();
430:            }
431:
432:            public long getContentLength() throws RepositoryException {
433:                return this .contentSource.getContentLength();
434:            }
435:
436:            public InputStream getInputStream() throws RepositoryException {
437:                return this .contentSource.getInputStream();
438:            }
439:
440:            public long getLastModified() throws RepositoryException {
441:
442:                if (!exists()) {
443:                    throw new RepositoryException("The node [" + this 
444:                            + "] does not exist!");
445:                }
446:
447:                long contentLastModified = this .contentSource.getLastModified();
448:                long metaLastModified = 0;
449:                if (this .metaSource.exists()) {
450:                    metaLastModified = this .metaSource.getLastModified();
451:                }
452:
453:                return Math.max(contentLastModified, metaLastModified);
454:            }
455:
456:            public String getMimeType() throws RepositoryException {
457:                return this .contentSource.getMimeType();
458:            }
459:
460:            public String[] getMetaDataNamespaceUris() throws MetaDataException {
461:                return this .metaSource.getMetaDataNamespaceUris();
462:            }
463:
464:            public synchronized void saveTransactionable()
465:                    throws TransactionException {
466:                if (!isCheckedOut()) {
467:                    throw new RepositoryException("Cannot save node ["
468:                            + getSourceURI() + "]: not checked out!");
469:                }
470:                this .contentSource.saveTransactionable();
471:                this .metaSource.saveTransactionable();
472:            }
473:
474:            public void delete() throws RepositoryException {
475:                this .contentSource.delete();
476:                this .metaSource.delete();
477:                registerRemoved();
478:            }
479:
480:            public String getCheckoutUserId() throws RepositoryException {
481:                RCML rcml = getRcml();
482:                synchronized (rcml) {
483:                    try {
484:                        if (!rcml.isCheckedOut()) {
485:                            throw new RepositoryException("The node [" + this 
486:                                    + "] is not checked out!");
487:                        }
488:                        return rcml.getLatestEntry().getIdentity();
489:                    } catch (RevisionControlException e) {
490:                        throw new RepositoryException(e);
491:                    }
492:                }
493:            }
494:
495:            public void copyRevisionsFrom(Node source)
496:                    throws RepositoryException {
497:                try {
498:                    boolean wasLocked = isLocked();
499:                    if (wasLocked) {
500:                        unlock();
501:                    }
502:                    getRcml().copyFrom(this , source);
503:                    if (wasLocked) {
504:                        // this is a hack: update the lock revision to the latest copied revision to avoid
505:                        // the "node has changed" error
506:                        this .lock = getSession().createLock(this ,
507:                                getCurrentRevisionNumber());
508:                    }
509:                } catch (RevisionControlException e) {
510:                    throw new RepositoryException(e);
511:                } catch (TransactionException e) {
512:                    throw new RepositoryException(e);
513:                }
514:            }
515:
516:            public void rollback(int revisionNumber) throws RepositoryException {
517:                try {
518:                    long time = getHistory().getRevision(revisionNumber)
519:                            .getTime();
520:                    getRcml().restoreBackup(this , time);
521:                } catch (RevisionControlException e) {
522:                    throw new RepositoryException(e);
523:                }
524:            }
525:
526:            public boolean isCheckedOutBySession() throws TransactionException {
527:                return isCheckedOutBySession(getSession());
528:            }
529:
530:            public void setPersistable(Persistable item)
531:                    throws RepositoryException {
532:                this .persistable = item;
533:            }
534:
535:            public Persistable getPersistable() {
536:                return this.persistable;
537:            }
538:
539:        }
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