Source Code Cross Referenced for HibernatePlanetManagerImpl.java in  » Blogger-System » apache-roller-3.1 » org » apache » roller » planet » business » hibernate » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Blogger System » apache roller 3.1 » org.apache.roller.planet.business.hibernate 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2005 Sun Microsystems, Inc.
003:         *
004:         * Licensed under the Apache License, Version 2.0 (the "License");
005:         * you may not use this file except in compliance with the License.
006:         * You may obtain a copy of the License at
007:         *
008:         *     http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         * Unless required by applicable law or agreed to in writing, software
011:         * distributed under the License is distributed on an "AS IS" BASIS,
012:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         * See the License for the specific language governing permissions and
014:         * limitations under the License.
015:         */
016:
017:        package org.apache.roller.planet.business.hibernate;
018:
019:        import com.sun.syndication.feed.synd.SyndEntry;
020:        import com.sun.syndication.feed.synd.SyndFeed;
021:        import com.sun.syndication.fetcher.FeedFetcher;
022:        import com.sun.syndication.fetcher.impl.FeedFetcherCache;
023:        import com.sun.syndication.fetcher.impl.HttpURLFeedFetcher;
024:        import com.sun.syndication.fetcher.impl.SyndFeedInfo;
025:        import java.io.File;
026:        import java.net.URL;
027:        import java.sql.Timestamp;
028:        import java.text.MessageFormat;
029:        import java.util.ArrayList;
030:        import java.util.Calendar;
031:        import java.util.Date;
032:        import java.util.HashMap;
033:        import java.util.Iterator;
034:        import java.util.List;
035:        import java.util.Map;
036:        import java.util.Set;
037:        import java.util.TreeSet;
038:        import org.apache.roller.business.hibernate.*;
039:        import org.hibernate.Criteria;
040:        import org.hibernate.HibernateException;
041:        import org.hibernate.Query;
042:        import org.hibernate.Session;
043:        import org.hibernate.criterion.Expression;
044:        import org.hibernate.criterion.Order;
045:        import org.apache.commons.logging.Log;
046:        import org.apache.commons.logging.LogFactory;
047:        import org.apache.roller.RollerException;
048:        import org.apache.roller.planet.business.PlanetManager;
049:        import org.apache.roller.planet.pojos.PlanetConfigData;
050:        import org.apache.roller.planet.pojos.PlanetEntryData;
051:        import org.apache.roller.planet.pojos.PlanetGroupData;
052:        import org.apache.roller.planet.pojos.PlanetSubscriptionData;
053:        import org.apache.roller.util.rome.DiskFeedInfoCache;
054:
055:        /**
056:         * Hibernate implementation of the PlanetManager.
057:         */
058:        public class HibernatePlanetManagerImpl implements  PlanetManager {
059:
060:            private static Log log = LogFactory
061:                    .getLog(HibernatePlanetManagerImpl.class);
062:
063:            protected static final String NO_GROUP = "zzz_nogroup_zzz";
064:
065:            private HibernatePersistenceStrategy strategy = null;
066:            private Map lastUpdatedByGroup = new HashMap();
067:
068:            public HibernatePlanetManagerImpl(HibernatePersistenceStrategy strat) {
069:                this .strategy = strat;
070:            }
071:
072:            public void saveConfiguration(PlanetConfigData config)
073:                    throws RollerException {
074:                strategy.store(config);
075:            }
076:
077:            public void saveGroup(PlanetGroupData group) throws RollerException {
078:                strategy.store(group);
079:            }
080:
081:            public void saveEntry(PlanetEntryData entry) throws RollerException {
082:                strategy.store(entry);
083:            }
084:
085:            public void saveSubscription(PlanetSubscriptionData sub)
086:                    throws RollerException {
087:                PlanetSubscriptionData existing = getSubscription(sub
088:                        .getFeedURL());
089:                if (existing == null || (existing.getId().equals(sub.getId()))) {
090:                    this .strategy.store(sub);
091:                } else {
092:                    throw new RollerException(
093:                            "ERROR: duplicate feed URLs not allowed");
094:                }
095:            }
096:
097:            public void deleteEntry(PlanetEntryData entry)
098:                    throws RollerException {
099:                strategy.remove(entry);
100:            }
101:
102:            public void deleteGroup(PlanetGroupData group)
103:                    throws RollerException {
104:                strategy.remove(group);
105:            }
106:
107:            public void deleteSubscription(PlanetSubscriptionData sub)
108:                    throws RollerException {
109:                strategy.remove(sub);
110:            }
111:
112:            public PlanetConfigData getConfiguration() throws RollerException {
113:                PlanetConfigData config = null;
114:                try {
115:                    Session session = ((HibernatePersistenceStrategy) strategy)
116:                            .getSession();
117:                    Criteria criteria = session
118:                            .createCriteria(PlanetConfigData.class);
119:                    criteria.setMaxResults(1);
120:                    List list = criteria.list();
121:                    config = list.size() != 0 ? (PlanetConfigData) list.get(0)
122:                            : null;
123:                } catch (HibernateException e) {
124:                    throw new RollerException(e);
125:                }
126:                return config;
127:            }
128:
129:            public PlanetSubscriptionData getSubscription(String feedURL)
130:                    throws RollerException {
131:                try {
132:                    Session session = ((HibernatePersistenceStrategy) strategy)
133:                            .getSession();
134:                    Criteria criteria = session
135:                            .createCriteria(PlanetSubscriptionData.class);
136:                    criteria.setMaxResults(1);
137:                    criteria.add(Expression.eq("feedURL", feedURL));
138:                    List list = criteria.list();
139:                    return list.size() != 0 ? (PlanetSubscriptionData) list
140:                            .get(0) : null;
141:                } catch (HibernateException e) {
142:                    throw new RollerException(e);
143:                }
144:            }
145:
146:            public PlanetSubscriptionData getSubscriptionById(String id)
147:                    throws RollerException {
148:                return (PlanetSubscriptionData) strategy.load(id,
149:                        PlanetSubscriptionData.class);
150:            }
151:
152:            public Iterator getAllSubscriptions() {
153:                try {
154:                    Session session = ((HibernatePersistenceStrategy) strategy)
155:                            .getSession();
156:                    Criteria criteria = session
157:                            .createCriteria(PlanetSubscriptionData.class);
158:                    criteria.addOrder(Order.asc("feedURL"));
159:                    List list = criteria.list();
160:                    return list.iterator();
161:                } catch (Throwable e) {
162:                    throw new RuntimeException(
163:                            "ERROR fetching subscription collection", e);
164:                }
165:            }
166:
167:            public int getSubscriptionCount() throws RollerException {
168:                try {
169:                    Session session = ((HibernatePersistenceStrategy) strategy)
170:                            .getSession();
171:                    Integer count = (Integer) session
172:                            .createQuery(
173:                                    "select count(*) from org.apache.roller.planet.pojos.PlanetSubscriptionData")
174:                            .uniqueResult();
175:                    return count.intValue();
176:                } catch (Throwable e) {
177:                    throw new RuntimeException(
178:                            "ERROR fetching subscription count", e);
179:                }
180:            }
181:
182:            public synchronized List getTopSubscriptions(int offset, int length)
183:                    throws RollerException {
184:                return getTopSubscriptions(null, offset, length);
185:            }
186:
187:            public synchronized List getTopSubscriptions(String groupHandle,
188:                    int offset, int length) throws RollerException {
189:                List ret = null;
190:                try {
191:                    Session session = ((HibernatePersistenceStrategy) strategy)
192:                            .getSession();
193:                    Query query = null;
194:                    if (groupHandle != null) {
195:                        query = session
196:                                .createQuery("select sub from org.apache.roller.planet.pojos.PlanetSubscriptionData sub "
197:                                        + "join sub.groups group "
198:                                        + "where "
199:                                        + "group.handle=:groupHandle "
200:                                        + "order by sub.inboundblogs desc");
201:                        query.setString("groupHandle", groupHandle);
202:                    } else {
203:                        query = session
204:                                .createQuery("select sub from org.apache.roller.planet.pojos.PlanetSubscriptionData sub "
205:                                        + "order by sub.inboundblogs desc");
206:                    }
207:                    if (offset != 0) {
208:                        query.setFirstResult(offset);
209:                    }
210:                    if (length != -1) {
211:                        query.setMaxResults(length);
212:                    }
213:                    ret = query.list();
214:                } catch (HibernateException e) {
215:                    throw new RollerException(e);
216:                }
217:                return ret;
218:            }
219:
220:            public PlanetGroupData getGroup(String handle)
221:                    throws RollerException {
222:                try {
223:                    Session session = strategy.getSession();
224:                    Criteria criteria = session
225:                            .createCriteria(PlanetGroupData.class);
226:                    criteria.setMaxResults(1);
227:                    criteria.add(Expression.eq("handle", handle));
228:                    return (PlanetGroupData) criteria.uniqueResult();
229:                } catch (HibernateException e) {
230:                    throw new RollerException(e);
231:                }
232:            }
233:
234:            public PlanetGroupData getGroupById(String id)
235:                    throws RollerException {
236:                return (PlanetGroupData) strategy.load(id,
237:                        PlanetGroupData.class);
238:            }
239:
240:            public List getGroups() throws RollerException {
241:                try {
242:                    Session session = ((HibernatePersistenceStrategy) strategy)
243:                            .getSession();
244:                    Criteria criteria = session
245:                            .createCriteria(PlanetGroupData.class);
246:                    return criteria.list();
247:                } catch (HibernateException e) {
248:                    throw new RollerException(e);
249:                }
250:            }
251:
252:            public List getGroupHandles() throws RollerException {
253:                List handles = new ArrayList();
254:                Iterator list = getGroups().iterator();
255:                while (list.hasNext()) {
256:                    PlanetGroupData group = (PlanetGroupData) list.next();
257:                    handles.add(group.getHandle());
258:                }
259:                return handles;
260:            }
261:
262:            public List getFeedEntries(String feedURL, int offset, int length)
263:                    throws RollerException {
264:                // TODO: ATLAS getFeedEntries DONE       
265:                try {
266:                    Session session = ((HibernatePersistenceStrategy) strategy)
267:                            .getSession();
268:                    Criteria criteria = session
269:                            .createCriteria(PlanetEntryData.class);
270:                    criteria
271:                            .add(Expression.eq("subscription.feedURL", feedURL));
272:                    criteria.addOrder(Order.desc("pubTime"));
273:                    criteria.setFirstResult(offset);
274:                    if (length != -1)
275:                        criteria.setMaxResults(length);
276:                    return criteria.list();
277:                } catch (HibernateException e) {
278:                    throw new RollerException(e);
279:                }
280:            }
281:
282:            public synchronized List getAggregation(int offset, int len)
283:                    throws RollerException {
284:                return getAggregation(null, null, null, offset, len);
285:            }
286:
287:            public synchronized List getAggregation(Date startDate,
288:                    Date endDate, int offset, int len) throws RollerException {
289:                return getAggregation(null, startDate, endDate, offset, len);
290:            }
291:
292:            public synchronized List getAggregation(PlanetGroupData group,
293:                    int offset, int len) throws RollerException {
294:                return getAggregation(group, null, null, offset, len);
295:            }
296:
297:            public synchronized List getAggregation(PlanetGroupData group,
298:                    Date startDate, Date endDate, int offset, int length)
299:                    throws RollerException {
300:                // TODO: ATLAS getAggregation DONE TESTED
301:                List ret = null;
302:                if (endDate == null)
303:                    endDate = new Date();
304:                try {
305:                    String groupHandle = (group == null) ? NO_GROUP : group
306:                            .getHandle();
307:                    long startTime = System.currentTimeMillis();
308:                    Session session = ((HibernatePersistenceStrategy) strategy)
309:                            .getSession();
310:
311:                    if (group != null) {
312:                        StringBuffer sb = new StringBuffer();
313:                        sb
314:                                .append("select e from org.apache.roller.planet.pojos.PlanetEntryData e ");
315:                        sb.append("join e.subscription.groups g ");
316:                        sb
317:                                .append("where g.handle=:groupHandle and e.pubTime < :endDate ");
318:                        if (startDate != null) {
319:                            sb.append("and e.pubTime > :startDate ");
320:                        }
321:                        sb.append("order by e.pubTime desc");
322:                        Query query = session.createQuery(sb.toString());
323:                        query.setParameter("groupHandle", group.getHandle());
324:                        query.setFirstResult(offset);
325:                        if (length != -1)
326:                            query.setMaxResults(length);
327:                        query.setParameter("endDate", endDate);
328:                        if (startDate != null) {
329:                            query.setParameter("startDate", startDate);
330:                        }
331:                        ret = query.list();
332:                    } else {
333:                        StringBuffer sb = new StringBuffer();
334:                        sb
335:                                .append("select e from org.apache.roller.planet.pojos.PlanetEntryData e ");
336:                        sb.append("join e.subscription.groups g ");
337:                        sb
338:                                .append("where (g.handle='external' or g.handle='all') ");
339:                        sb.append("and e.pubTime < :endDate ");
340:                        if (startDate != null) {
341:                            sb.append("and e.pubTime > :startDate ");
342:                        }
343:                        sb.append("order by e.pubTime desc");
344:                        Query query = session.createQuery(sb.toString());
345:                        query.setFirstResult(offset);
346:                        if (length != -1)
347:                            query.setMaxResults(length);
348:                        query.setParameter("endDate", endDate);
349:                        if (startDate != null) {
350:                            query.setParameter("startDate", startDate);
351:                        }
352:                        ret = query.list();
353:                    }
354:                    Date retLastUpdated = null;
355:                    if (ret.size() > 0) {
356:                        PlanetEntryData entry = (PlanetEntryData) ret.get(0);
357:                        retLastUpdated = entry.getPubTime();
358:                    } else {
359:                        retLastUpdated = new Date();
360:                    }
361:                    lastUpdatedByGroup.put(groupHandle, retLastUpdated);
362:
363:                    long endTime = System.currentTimeMillis();
364:                    log.debug("Generated aggregation in "
365:                            + ((endTime - startTime) / 1000.0) + " seconds");
366:
367:                } catch (Throwable e) {
368:                    log.error("ERROR: building aggregation for: "
369:                            + group.getHandle(), e);
370:                    throw new RollerException(e);
371:                }
372:                return ret;
373:            }
374:
375:            public synchronized void clearCachedAggregations() {
376:                lastUpdatedByGroup.clear();
377:            }
378:
379:            public Date getLastUpdated() {
380:                return (Date) lastUpdatedByGroup.get(NO_GROUP);
381:            }
382:
383:            public Date getLastUpdated(PlanetGroupData group) {
384:                return (Date) lastUpdatedByGroup.get(group);
385:            }
386:
387:            public void refreshEntries(String cacheDirPath)
388:                    throws RollerException {
389:
390:                Date now = new Date();
391:                long startTime = System.currentTimeMillis();
392:                PlanetConfigData config = getConfiguration();
393:
394:                // can't continue without cache dir
395:                if (cacheDirPath == null) {
396:                    log
397:                            .warn("Planet cache directory not set, aborting refresh");
398:                    return;
399:                }
400:
401:                // allow ${user.home} in cache dir property
402:                String cacheDirName = cacheDirPath.replaceFirst(
403:                        "\\$\\{user.home}", System.getProperty("user.home"));
404:
405:                // allow ${catalina.home} in cache dir property
406:                if (System.getProperty("catalina.home") != null) {
407:                    cacheDirName = cacheDirName.replaceFirst(
408:                            "\\$\\{catalina.home}", System
409:                                    .getProperty("catalina.home"));
410:                }
411:
412:                // create cache  dir if it does not exist
413:                File cacheDir = null;
414:                try {
415:                    cacheDir = new File(cacheDirName);
416:                    if (!cacheDir.exists())
417:                        cacheDir.mkdirs();
418:                } catch (Exception e) {
419:                    log.error("Unable to create planet cache directory");
420:                    return;
421:                }
422:
423:                // abort if cache dir is not writable
424:                if (!cacheDir.canWrite()) {
425:                    log.error("Planet cache directory is not writable");
426:                    return;
427:                }
428:
429:                FeedFetcherCache feedInfoCache = new DiskFeedInfoCache(
430:                        cacheDirName);
431:
432:                if (config.getProxyHost() != null && config.getProxyPort() > 0) {
433:                    System.setProperty("proxySet", "true");
434:                    System.setProperty("http.proxyHost", config.getProxyHost());
435:                    System.setProperty("http.proxyPort", Integer
436:                            .toString(config.getProxyPort()));
437:                }
438:                /** a hack to set 15 sec timeouts for java.net.HttpURLConnection */
439:                System.setProperty("sun.net.client.defaultConnectTimeout",
440:                        "15000");
441:                System
442:                        .setProperty("sun.net.client.defaultReadTimeout",
443:                                "15000");
444:
445:                FeedFetcher feedFetcher = new HttpURLFeedFetcher(feedInfoCache);
446:                //FeedFetcher feedFetcher = new HttpClientFeedFetcher(feedInfoCache);
447:                feedFetcher.setUsingDeltaEncoding(false);
448:                feedFetcher.setUserAgent("RollerPlanetAggregator");
449:
450:                // Loop through all subscriptions in the system
451:                Iterator subs = getAllSubscriptions();
452:                while (subs.hasNext()) {
453:
454:                    long subStartTime = System.currentTimeMillis();
455:
456:                    PlanetSubscriptionData sub = (PlanetSubscriptionData) subs
457:                            .next();
458:
459:                    // reattach sub.  sub gets detached as we iterate
460:                    sub = this .getSubscriptionById(sub.getId());
461:
462:                    Set newEntries = this .getNewEntries(sub, feedFetcher,
463:                            feedInfoCache);
464:                    int count = newEntries.size();
465:
466:                    log.debug("   Entry count: " + count);
467:                    if (count > 0) {
468:                        sub.purgeEntries();
469:                        sub.addEntries(newEntries);
470:                        this .saveSubscription(sub);
471:                        this .strategy.flush();
472:                    }
473:                    long subEndTime = System.currentTimeMillis();
474:                    log.debug("   " + count + " - "
475:                            + ((subEndTime - subStartTime) / 1000.0)
476:                            + " seconds to process (" + count + ") entries of "
477:                            + sub.getFeedURL());
478:                }
479:                // Clear the aggregation cache
480:                clearCachedAggregations();
481:
482:                long endTime = System.currentTimeMillis();
483:                log.info("--- DONE --- Refreshed entries in "
484:                        + ((endTime - startTime) / 1000.0) + " seconds");
485:            }
486:
487:            protected Set getNewEntries(PlanetSubscriptionData sub,
488:                    FeedFetcher feedFetcher, FeedFetcherCache feedInfoCache)
489:                    throws RollerException {
490:
491:                Set newEntries = new TreeSet();
492:                SyndFeed feed = null;
493:                URL feedURL = null;
494:                Date lastUpdated = new Date();
495:                try {
496:                    feedURL = new URL(sub.getFeedURL());
497:                    log.debug("Get feed from cache " + sub.getFeedURL());
498:                    feed = feedFetcher.retrieveFeed(feedURL);
499:                    SyndFeedInfo feedInfo = feedInfoCache.getFeedInfo(feedURL);
500:                    if (feedInfo.getLastModified() != null) {
501:                        long lastUpdatedLong = ((Long) feedInfo
502:                                .getLastModified()).longValue();
503:                        if (lastUpdatedLong != 0) {
504:                            lastUpdated = new Date(lastUpdatedLong);
505:                        }
506:                    }
507:                    Thread.sleep(100); // be nice
508:                } catch (Exception e) {
509:                    log.warn("ERROR parsing " + sub.getFeedURL() + " : "
510:                            + e.getClass().getName() + " : " + e.getMessage());
511:                    log.debug(e);
512:                    return newEntries; // bail out
513:                }
514:                if (lastUpdated != null && sub.getLastUpdated() != null) {
515:                    Calendar feedCal = Calendar.getInstance();
516:                    feedCal.setTime(lastUpdated);
517:
518:                    Calendar subCal = Calendar.getInstance();
519:                    subCal.setTime(sub.getLastUpdated());
520:
521:                    if (!feedCal.after(subCal)) {
522:                        if (log.isDebugEnabled()) {
523:                            String msg = MessageFormat
524:                                    .format("   Skipping ({0} / {1})",
525:                                            new Object[] { lastUpdated,
526:                                                    sub.getLastUpdated() });
527:                            log.debug(msg);
528:                        }
529:                        return newEntries; // bail out
530:                    }
531:                }
532:                if (feed.getPublishedDate() != null) {
533:                    sub.setLastUpdated(feed.getPublishedDate());
534:                    // saving sub here causes detachment issues, so we save it later
535:                }
536:
537:                // Horrible kludge for Feeds without entry dates: most recent entry is 
538:                // given feed's last publish date (or yesterday if none exists) and 
539:                // earler entries are placed at once day intervals before that.
540:                Calendar cal = Calendar.getInstance();
541:                if (sub.getLastUpdated() != null) {
542:                    cal.setTime(sub.getLastUpdated());
543:                } else {
544:                    cal.setTime(new Date());
545:                    cal.add(Calendar.DATE, -1);
546:                }
547:
548:                // Populate subscription object with new entries
549:                Iterator entries = feed.getEntries().iterator();
550:                while (entries.hasNext()) {
551:                    try {
552:                        SyndEntry romeEntry = (SyndEntry) entries.next();
553:                        PlanetEntryData entry = new PlanetEntryData(feed,
554:                                romeEntry, sub);
555:                        log.debug("Entry title=" + entry.getTitle()
556:                                + " content size="
557:                                + entry.getContent().length());
558:                        if (entry.getPubTime() == null) {
559:                            log
560:                                    .debug("No published date, assigning fake date for "
561:                                            + feedURL);
562:                            entry.setPubTime(new Timestamp(cal
563:                                    .getTimeInMillis()));
564:                        }
565:                        if (entry.getPermalink() == null) {
566:                            log.warn("No permalink, rejecting entry from "
567:                                    + feedURL);
568:                        } else {
569:                            newEntries.add(entry);
570:                        }
571:                        cal.add(Calendar.DATE, -1);
572:                    } catch (Exception e) {
573:                        log.error("ERROR processing subscription entry", e);
574:                    }
575:                }
576:                return newEntries;
577:            }
578:
579:        }
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