Source Code Cross Referenced for TrackbackPlugin.java in  » Blogger-System » blojsom-3.1 » org » blojsom » plugin » trackback » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Blogger System » blojsom 3.1 » org.blojsom.plugin.trackback 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * Copyright (c) 2003-2007, David A. Czarnecki
003:         * All rights reserved.
004:         *
005:         * Redistribution and use in source and binary forms, with or without
006:         * modification, are permitted provided that the following conditions are met:
007:         *
008:         * Redistributions of source code must retain the above copyright notice, this list of conditions and the
009:         *     following disclaimer.
010:         * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
011:         *     following disclaimer in the documentation and/or other materials provided with the distribution.
012:         * Neither the name of "David A. Czarnecki" and "blojsom" nor the names of its contributors may be used to
013:         *     endorse or promote products derived from this software without specific prior written permission.
014:         * Products derived from this software may not be called "blojsom", nor may "blojsom" appear in their name,
015:         *     without prior written permission of David A. Czarnecki.
016:         *
017:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
018:         * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
019:         * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
020:         * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
021:         * EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
022:         * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
023:         * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
024:         * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
025:         * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
026:         * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
027:         * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
028:         * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
029:         * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
030:         */package org.blojsom.plugin.trackback;
031:
032:        import org.apache.commons.logging.Log;
033:        import org.apache.commons.logging.LogFactory;
034:        import org.apache.commons.mail.Email;
035:        import org.apache.commons.mail.EmailException;
036:        import org.apache.commons.mail.HtmlEmail;
037:        import org.blojsom.blog.Blog;
038:        import org.blojsom.blog.Entry;
039:        import org.blojsom.blog.Trackback;
040:        import org.blojsom.blog.User;
041:        import org.blojsom.event.Event;
042:        import org.blojsom.event.EventBroadcaster;
043:        import org.blojsom.event.Listener;
044:        import org.blojsom.fetcher.Fetcher;
045:        import org.blojsom.fetcher.FetcherException;
046:        import org.blojsom.plugin.PluginException;
047:        import org.blojsom.plugin.common.ResponseConstants;
048:        import org.blojsom.plugin.email.EmailConstants;
049:        import org.blojsom.plugin.trackback.event.TrackbackAddedEvent;
050:        import org.blojsom.plugin.trackback.event.TrackbackResponseSubmissionEvent;
051:        import org.blojsom.plugin.velocity.StandaloneVelocityPlugin;
052:        import org.blojsom.util.BlojsomConstants;
053:        import org.blojsom.util.BlojsomMetaDataConstants;
054:        import org.blojsom.util.BlojsomUtils;
055:
056:        import javax.mail.Session;
057:        import javax.naming.Context;
058:        import javax.naming.InitialContext;
059:        import javax.naming.NamingException;
060:        import javax.servlet.http.HttpServletRequest;
061:        import javax.servlet.http.HttpServletResponse;
062:        import java.util.*;
063:
064:        /**
065:         * TrackbackPlugin
066:         *
067:         * @author David Czarnecki
068:         * @since blojsom 3.0
069:         * @version $Id: TrackbackPlugin.java,v 1.9 2007/01/17 02:35:14 czarneckid Exp $
070:         */
071:        public class TrackbackPlugin extends StandaloneVelocityPlugin implements 
072:                BlojsomMetaDataConstants, Listener, EmailConstants {
073:
074:            private Log _logger = LogFactory.getLog(TrackbackPlugin.class);
075:
076:            /**
077:             * Template for comment e-mails
078:             */
079:            public static final String TRACKBACK_PLUGIN_EMAIL_TEMPLATE_TEXT = "org/blojsom/plugin/trackback/trackback-plugin-email-template-text.vm";
080:            public static final String TRACKBACK_PLUGIN_EMAIL_TEMPLATE_HTML = "org/blojsom/plugin/trackback/trackback-plugin-email-template-html.vm";
081:
082:            /**
083:             * Default prefix for trackback e-mail notification
084:             */
085:            public static final String DEFAULT_TRACKBACK_PREFIX = "[blojsom] Trackback on: ";
086:
087:            /**
088:             * Initialization parameter for e-mail prefix
089:             */
090:            public static final String TRACKBACK_PREFIX_IP = "plugin-trackback-email-prefix";
091:
092:            /**
093:             * Initialization parameter for the throttling of trackbacks from IP addresses
094:             */
095:            public static final String TRACKBACK_THROTTLE_MINUTES_IP = "plugin-trackback-throttle";
096:
097:            /**
098:             * Initialization parameter for disabling trackbacks on entries after a certain number of days
099:             */
100:            public static final String TRACKBACK_DAYS_EXPIRATION_IP = "plugin-trackback-days-expiration";
101:
102:            /**
103:             * Default throttle value for trackbacks from a particular IP address
104:             */
105:            private static final int TRACKBACK_THROTTLE_DEFAULT_MINUTES = 5;
106:
107:            /**
108:             * Request parameter to indicate a trackback "tb"
109:             */
110:            public static final String TRACKBACK_PARAM = "tb";
111:
112:            /**
113:             * Request parameter for the trackback "title"
114:             */
115:            public static final String TRACKBACK_TITLE_PARAM = "title";
116:
117:            /**
118:             * Request parameter for the trackback "excerpt"
119:             */
120:            public static final String TRACKBACK_EXCERPT_PARAM = "excerpt";
121:
122:            /**
123:             * Request parameter for the trackback "url"
124:             */
125:            public static final String TRACKBACK_URL_PARAM = "url";
126:
127:            /**
128:             * Request parameter for the trackback "blog_name"
129:             */
130:            public static final String TRACKBACK_BLOG_NAME_PARAM = "blog_name";
131:
132:            /**
133:             * Key under which the indicator this plugin is "live" will be placed
134:             * (example: on the request for the JSPDispatcher)
135:             */
136:            public static final String BLOJSOM_TRACKBACK_PLUGIN_ENABLED = "BLOJSOM_TRACKBACK_PLUGIN_ENABLED";
137:
138:            /**
139:             * Key under which the trackback return code will be placed
140:             * (example: on the request for the JSPDispatcher)
141:             */
142:            public static final String BLOJSOM_TRACKBACK_RETURN_CODE = "BLOJSOM_TRACKBACK_RETURN_CODE";
143:
144:            /**
145:             * Key under which the trackback error message will be placed
146:             * (example: on the request for the JSPDispatcher)
147:             */
148:            public static final String BLOJSOM_TRACKBACK_MESSAGE = "BLOJSOM_TRACKBACK_MESSAGE";
149:
150:            /**
151:             * IP address meta-data
152:             */
153:            public static final String BLOJSOM_TRACKBACK_PLUGIN_METADATA_IP = "BLOJSOM_TRACKBACK_PLUGIN_METADATA_IP";
154:
155:            /**
156:             * Trackback success page
157:             */
158:            private static final String TRACKBACK_SUCCESS_PAGE = "/trackback-success";
159:
160:            /**
161:             * Trackback failure page
162:             */
163:            private static final String TRACKBACK_FAILURE_PAGE = "/trackback-failure";
164:
165:            /**
166:             * Key under which the blog entry will be placed for merging the trackback e-mail
167:             */
168:            public static final String BLOJSOM_TRACKBACK_PLUGIN_BLOG_ENTRY = "BLOJSOM_TRACKBACK_PLUGIN_BLOG_ENTRY";
169:
170:            /**
171:             * Key under which the blog comment will be placed for merging the trackback e-mail
172:             */
173:            public static final String BLOJSOM_TRACKBACK_PLUGIN_TRACKBACK = "BLOJSOM_TRACKBACK_PLUGIN_TRACKBACK";
174:
175:            public static final String BLOJSOM_PLUGIN_TRACKBACK_METADATA = "BLOJSOM_PLUGIN_TRACKBACK_METADATA";
176:
177:            public static final String BLOJSOM_PLUGIN_TRACKBACK_METADATA_DESTROY = "BLOJSOM_PLUGIN_TRACKBACK_METADATA_DESTROY";
178:
179:            private Map _ipAddressTrackbackTimes;
180:            private String _mailServer;
181:            private String _mailServerUsername;
182:            private String _mailServerPassword;
183:            private Session _session;
184:            private Fetcher _fetcher;
185:            private EventBroadcaster _eventBroadcaster;
186:
187:            /**
188:             * Default constructor
189:             */
190:            public TrackbackPlugin() {
191:            }
192:
193:            /**
194:             * Set the {@link oEventBroadcaster} event broadcaster
195:             *
196:             * @param eventBroadcaster {@link EventBroadcaster}
197:             */
198:            public void setEventBroadcaster(EventBroadcaster eventBroadcaster) {
199:                _eventBroadcaster = eventBroadcaster;
200:            }
201:
202:            /**
203:             * Set the {@link Fetcher}
204:             *
205:             * @param fetcher {@link Fetcher}
206:             */
207:            public void setFetcher(Fetcher fetcher) {
208:                _fetcher = fetcher;
209:            }
210:
211:            /**
212:             * Initialize this plugin. This method only called when the plugin is instantiated.
213:             *
214:             * @throws PluginException If there is an error initializing the plugin
215:             */
216:            public void init() throws PluginException {
217:                super .init();
218:
219:                _mailServer = _servletConfig.getInitParameter(SMTPSERVER_IP);
220:
221:                if (_mailServer != null) {
222:                    if (_mailServer.startsWith("java:comp/env")) {
223:                        try {
224:                            Context context = new InitialContext();
225:                            _session = (Session) context.lookup(_mailServer);
226:                        } catch (NamingException e) {
227:                            _logger.error(e);
228:                            throw new PluginException(e);
229:                        }
230:                    } else {
231:                        _mailServerUsername = _servletConfig
232:                                .getInitParameter(SMTPSERVER_USERNAME_IP);
233:                        _mailServerPassword = _servletConfig
234:                                .getInitParameter(SMTPSERVER_PASSWORD_IP);
235:                    }
236:                } else {
237:                    throw new PluginException(
238:                            "Missing SMTP servername servlet initialization parameter: "
239:                                    + SMTPSERVER_IP);
240:                }
241:
242:                _ipAddressTrackbackTimes = new WeakHashMap();
243:                _eventBroadcaster.addListener(this );
244:            }
245:
246:            /**
247:             * Process the blog entries
248:             *
249:             * @param httpServletRequest  Request
250:             * @param httpServletResponse Response
251:             * @param blog                {@link Blog} instance
252:             * @param context             Context
253:             * @param entries             Blog entries retrieved for the particular request
254:             * @return Modified set of blog entries
255:             * @throws PluginException If there is an error processing the blog entries
256:             */
257:            public Entry[] process(HttpServletRequest httpServletRequest,
258:                    HttpServletResponse httpServletResponse, Blog blog,
259:                    Map context, Entry[] entries) throws PluginException {
260:                context.put(BLOJSOM_TRACKBACK_PLUGIN_ENABLED, blog
261:                        .getBlogTrackbacksEnabled());
262:                if (!blog.getBlogTrackbacksEnabled().booleanValue()) {
263:                    if (_logger.isDebugEnabled()) {
264:                        _logger.debug("Trackbacks not enabled for blog: "
265:                                + blog.getBlogId());
266:                    }
267:
268:                    return entries;
269:                }
270:
271:                Boolean _blogTrackbacksEnabled;
272:
273:                _blogTrackbacksEnabled = blog.getBlogTrackbacksEnabled();
274:
275:                if (entries.length == 0) {
276:                    return entries;
277:                }
278:
279:                if (!_blogTrackbacksEnabled.booleanValue()) {
280:                    return entries;
281:                }
282:
283:                String url = httpServletRequest
284:                        .getParameter(TRACKBACK_URL_PARAM);
285:                String permalink = httpServletRequest
286:                        .getParameter(BlojsomConstants.PERMALINK_PARAM);
287:                String title = httpServletRequest
288:                        .getParameter(TRACKBACK_TITLE_PARAM);
289:                String excerpt = httpServletRequest
290:                        .getParameter(TRACKBACK_EXCERPT_PARAM);
291:                String blogName = httpServletRequest
292:                        .getParameter(TRACKBACK_BLOG_NAME_PARAM);
293:                String tb = httpServletRequest.getParameter(TRACKBACK_PARAM);
294:                String remoteIPAddress = httpServletRequest.getRemoteAddr();
295:
296:                if ((permalink != null) && (!"".equals(permalink))
297:                        && (tb != null) && ("y".equalsIgnoreCase(tb))) {
298:                    if ((url == null) || ("".equals(url.trim()))) {
299:                        context.put(BLOJSOM_TRACKBACK_RETURN_CODE, new Integer(
300:                                1));
301:                        context
302:                                .put(BLOJSOM_TRACKBACK_MESSAGE,
303:                                        "No url parameter for trackback. url must be specified.");
304:                        httpServletRequest.setAttribute(
305:                                BlojsomConstants.PAGE_PARAM,
306:                                TRACKBACK_FAILURE_PAGE);
307:
308:                        return entries;
309:                    }
310:
311:                    // Check for trackback throttling
312:                    String trackbackThrottleValue = blog
313:                            .getProperty(TRACKBACK_THROTTLE_MINUTES_IP);
314:                    if (!BlojsomUtils.checkNullOrBlank(trackbackThrottleValue)) {
315:                        int trackbackThrottleMinutes;
316:
317:                        try {
318:                            trackbackThrottleMinutes = Integer
319:                                    .parseInt(trackbackThrottleValue);
320:                        } catch (NumberFormatException e) {
321:                            trackbackThrottleMinutes = TRACKBACK_THROTTLE_DEFAULT_MINUTES;
322:                        }
323:                        if (_logger.isDebugEnabled()) {
324:                            _logger.debug("Trackback throttling enabled at: "
325:                                    + trackbackThrottleMinutes + " minutes");
326:                        }
327:
328:                        if (_ipAddressTrackbackTimes
329:                                .containsKey(remoteIPAddress)) {
330:                            Calendar currentTime = Calendar.getInstance();
331:                            Calendar timeOfLastTrackback = (Calendar) _ipAddressTrackbackTimes
332:                                    .get(remoteIPAddress);
333:                            long timeDifference = currentTime.getTimeInMillis()
334:                                    - timeOfLastTrackback.getTimeInMillis();
335:
336:                            long differenceInMinutes = timeDifference
337:                                    / (60 * 1000);
338:                            if (differenceInMinutes < trackbackThrottleMinutes) {
339:                                if (_logger.isDebugEnabled()) {
340:                                    _logger
341:                                            .debug("Trackback throttle enabled. Comment from IP address: "
342:                                                    + remoteIPAddress
343:                                                    + " in less than "
344:                                                    + trackbackThrottleMinutes
345:                                                    + " minutes");
346:                                }
347:
348:                                context.put(BLOJSOM_TRACKBACK_RETURN_CODE,
349:                                        new Integer(1));
350:                                context.put(BLOJSOM_TRACKBACK_MESSAGE,
351:                                        "Trackback throttling enabled.");
352:                                httpServletRequest.setAttribute(
353:                                        BlojsomConstants.PAGE_PARAM,
354:                                        TRACKBACK_FAILURE_PAGE);
355:
356:                                return entries;
357:                            } else {
358:                                if (_logger.isDebugEnabled()) {
359:                                    _logger
360:                                            .debug("Trackback throttle enabled. Resetting date of last comment to current time");
361:                                }
362:                                _ipAddressTrackbackTimes.put(remoteIPAddress,
363:                                        currentTime);
364:                            }
365:                        } else {
366:                            Calendar calendar = Calendar.getInstance();
367:                            _ipAddressTrackbackTimes.put(remoteIPAddress,
368:                                    calendar);
369:                        }
370:                    }
371:
372:                    url = url.trim();
373:                    if (!url.toLowerCase().startsWith("http://")) {
374:                        url = "http://" + url;
375:                    }
376:
377:                    if (BlojsomUtils.checkNullOrBlank(title)) {
378:                        title = url;
379:                    } else {
380:                        title = title.trim();
381:                        title = BlojsomUtils.escapeStringSimple(title);
382:                        title = BlojsomUtils.stripLineTerminators(title, " ");
383:                    }
384:
385:                    if (excerpt == null) {
386:                        excerpt = "";
387:                    } else {
388:                        if (excerpt.length() >= 255) {
389:                            excerpt = excerpt.substring(0, 252);
390:                            excerpt += "...";
391:                        }
392:
393:                        excerpt = BlojsomUtils.stripLineTerminators(excerpt,
394:                                " ");
395:                    }
396:                    excerpt = BlojsomUtils.escapeStringSimple(excerpt);
397:
398:                    if (blogName == null) {
399:                        blogName = "";
400:                    } else {
401:                        blogName = blogName.trim();
402:                        blogName = BlojsomUtils.escapeStringSimple(blogName);
403:                        blogName = BlojsomUtils.stripLineTerminators(blogName,
404:                                " ");
405:                    }
406:
407:                    Entry entryForTrackback = _fetcher.newEntry();
408:                    try {
409:                        String blogEntryId = BlojsomUtils.getRequestValue(
410:                                "entry_id", httpServletRequest);
411:                        Integer entryId;
412:                        try {
413:                            entryId = Integer.valueOf(blogEntryId);
414:                        } catch (NumberFormatException e) {
415:                            if (_logger.isErrorEnabled()) {
416:                                _logger.error(e);
417:                            }
418:
419:                            return entries;
420:                        }
421:
422:                        entryForTrackback.setId(entryId);
423:
424:                        _fetcher.loadEntry(blog, entryForTrackback);
425:                        if (_logger.isDebugEnabled()) {
426:                            _logger.debug("Loaded entry for trackback: "
427:                                    + entryId.toString());
428:                        }
429:
430:                        // Check for a trackback where the number of days between trackback auto-expiration has passed
431:                        String trackbackDaysExpiration = blog
432:                                .getProperty(TRACKBACK_DAYS_EXPIRATION_IP);
433:                        if (!BlojsomUtils
434:                                .checkNullOrBlank(trackbackDaysExpiration)) {
435:                            try {
436:                                int daysExpiration = Integer
437:                                        .parseInt(trackbackDaysExpiration);
438:                                int daysBetweenDates = BlojsomUtils
439:                                        .daysBetweenDates(entryForTrackback
440:                                                .getDate(), new Date());
441:                                if ((daysExpiration > 0)
442:                                        && (daysBetweenDates >= daysExpiration)) {
443:                                    if (_logger.isDebugEnabled()) {
444:                                        _logger
445:                                                .debug("Trackback period for this entry has expired. Expiration period set at "
446:                                                        + daysExpiration
447:                                                        + " days. Difference in days: "
448:                                                        + daysBetweenDates);
449:                                    }
450:
451:                                    return entries;
452:                                }
453:                            } catch (NumberFormatException e) {
454:                            }
455:                        }
456:                    } catch (FetcherException e) {
457:                        if (_logger.isErrorEnabled()) {
458:                            _logger.error(e);
459:                        }
460:                    }
461:
462:                    Map trackbackMetaData = new HashMap();
463:
464:                    // Check to see if a previous plugin populated meta-data for the comment
465:                    if (context.containsKey(BLOJSOM_PLUGIN_TRACKBACK_METADATA)) {
466:                        Map metaData = (Map) context
467:                                .get(BLOJSOM_PLUGIN_TRACKBACK_METADATA);
468:
469:                        Iterator metaDataKeys = metaData.keySet().iterator();
470:                        Object key;
471:                        Object value;
472:                        while (metaDataKeys.hasNext()) {
473:                            key = metaDataKeys.next();
474:                            value = metaData.get(key);
475:                            trackbackMetaData.put(key, value);
476:                        }
477:                    }
478:
479:                    Trackback trackback = _fetcher.newTrackback();
480:                    trackback.setBlogEntryId(entryForTrackback.getId());
481:                    trackback.setEntry(entryForTrackback);
482:
483:                    Integer code = new Integer(1);
484:
485:                    _eventBroadcaster
486:                            .processEvent(new TrackbackResponseSubmissionEvent(
487:                                    this , new Date(), blog, httpServletRequest,
488:                                    httpServletResponse, blogName, title, url,
489:                                    excerpt, entryForTrackback,
490:                                    trackbackMetaData));
491:
492:                    // Check to see if the trackback should be destroyed (not saved) automatically
493:                    if (!trackbackMetaData
494:                            .containsKey(BLOJSOM_PLUGIN_TRACKBACK_METADATA_DESTROY)) {
495:                        code = addTrackback(title, excerpt, url, blogName,
496:                                trackbackMetaData, trackback, blog, context,
497:                                httpServletRequest);
498:
499:                        // For persisting the Last-Modified time
500:                        context.put(BlojsomConstants.BLOJSOM_LAST_MODIFIED,
501:                                new Long(new Date().getTime()));
502:                    } else {
503:                        if (_logger.isInfoEnabled()) {
504:                            _logger
505:                                    .info("Trackback meta-data contained destroy key. Trackback was not saved");
506:                        }
507:                    }
508:
509:                    context.put(BLOJSOM_TRACKBACK_RETURN_CODE, code);
510:                    if (code.intValue() == 0) {
511:                        httpServletRequest.setAttribute(
512:                                BlojsomConstants.PAGE_PARAM,
513:                                TRACKBACK_SUCCESS_PAGE);
514:
515:                        try {
516:                            _fetcher.loadEntry(blog, entries[0]);
517:                            _fetcher.loadEntry(blog, entryForTrackback);
518:                            _eventBroadcaster
519:                                    .broadcastEvent(new TrackbackAddedEvent(
520:                                            this , new Date(), trackback, blog));
521:                        } catch (FetcherException e) {
522:                            if (_logger.isErrorEnabled()) {
523:                                _logger.error(e);
524:                            }
525:                        }
526:                    } else {
527:                        httpServletRequest.setAttribute(
528:                                BlojsomConstants.PAGE_PARAM,
529:                                TRACKBACK_FAILURE_PAGE);
530:                    }
531:                }
532:
533:                return entries;
534:            }
535:
536:            /**
537:             * Add a trackback
538:             *
539:             * @param title Title
540:             * @param excerpt Excerpt
541:             * @param url URL
542:             * @param blogName Blog name
543:             * @param trackbackMetaData Trackback meta-data
544:             * @param trackback {@link Trackback}
545:             * @param blog {@link Blog}
546:             * @param context Context
547:             * @param httpServletRequest {@link HttpServletRequest}
548:             * @return <code>0</code> if adding the trackback was successful, <code>1</code> if there was an error
549:             */
550:            private Integer addTrackback(String title, String excerpt,
551:                    String url, String blogName, Map trackbackMetaData,
552:                    Trackback trackback, Blog blog, Map context,
553:                    HttpServletRequest httpServletRequest) {
554:                try {
555:                    excerpt = BlojsomUtils.escapeMetaAndLink(excerpt);
556:                    trackback.setTitle(title);
557:                    trackback.setExcerpt(excerpt);
558:                    trackback.setUrl(url);
559:                    trackback.setBlogName(blogName);
560:                    trackback.setTrackbackDate(new Date());
561:                    trackback.setBlogId(blog.getId());
562:                    trackback.setIp(httpServletRequest.getRemoteAddr());
563:                    trackback.setMetaData(trackbackMetaData);
564:                    if (trackbackMetaData
565:                            .containsKey(TrackbackModerationPlugin.BLOJSOM_TRACKBACK_MODERATION_PLUGIN_APPROVED)
566:                            && "true"
567:                                    .equals(trackbackMetaData
568:                                            .get(TrackbackModerationPlugin.BLOJSOM_TRACKBACK_MODERATION_PLUGIN_APPROVED))) {
569:                        trackback.setStatus(ResponseConstants.APPROVED_STATUS);
570:                    } else {
571:                        if ("true"
572:                                .equals(blog
573:                                        .getProperty(TrackbackModerationPlugin.TRACKBACK_MODERATION_ENABLED))) {
574:                            trackback.setStatus(ResponseConstants.NEW_STATUS);
575:                        } else {
576:                            trackback
577:                                    .setStatus(ResponseConstants.APPROVED_STATUS);
578:                        }
579:                    }
580:
581:                    _fetcher.saveTrackback(blog, trackback);
582:
583:                    return new Integer(0);
584:                } catch (FetcherException e) {
585:                    if (_logger.isErrorEnabled()) {
586:                        _logger.error(e);
587:                    }
588:
589:                    context.put(BLOJSOM_TRACKBACK_MESSAGE, e.getMessage());
590:
591:                    return new Integer(1);
592:                }
593:            }
594:
595:            /**
596:             * Perform any cleanup for the plugin. Called after {@link #process}.
597:             *
598:             * @throws PluginException If there is an error performing cleanup for this plugin
599:             */
600:            public void cleanup() throws PluginException {
601:            }
602:
603:            /**
604:             * Called when BlojsomServlet is taken out of service
605:             *
606:             * @throws PluginException If there is an error in finalizing this plugin
607:             */
608:            public void destroy() throws PluginException {
609:            }
610:
611:            /**
612:             * Setup the comment e-mail
613:             *
614:             * @param blog  {@link Blog} information
615:             * @param email Email message
616:             * @throws EmailException If there is an error preparing the e-mail message
617:             */
618:            protected void setupEmail(Blog blog, Entry entry, Email email)
619:                    throws EmailException {
620:                email.setCharset(BlojsomConstants.UTF8);
621:
622:                // If we have a mail session for the environment, use that
623:                if (_session != null) {
624:                    email.setMailSession(_session);
625:                } else {
626:                    // Otherwise, if there is a username and password for the mail server, use that
627:                    if (!BlojsomUtils.checkNullOrBlank(_mailServerUsername)
628:                            && !BlojsomUtils
629:                                    .checkNullOrBlank(_mailServerPassword)) {
630:                        email.setHostName(_mailServer);
631:                        email.setAuthentication(_mailServerUsername,
632:                                _mailServerPassword);
633:                    } else {
634:                        email.setHostName(_mailServer);
635:                    }
636:                }
637:
638:                email.setFrom(blog.getBlogOwnerEmail(), "Blojsom Trackback");
639:
640:                String author = entry.getAuthor();
641:                if (BlojsomUtils.checkNullOrBlank(author)) {
642:                    author = blog.getBlogOwner();
643:                }
644:
645:                String authorEmail = blog.getBlogOwnerEmail();
646:
647:                if (author != null) {
648:                    try {
649:                        User user = _fetcher.loadUser(blog, author);
650:
651:                        if (user == null) {
652:                            authorEmail = blog.getBlogOwnerEmail();
653:                        } else {
654:                            authorEmail = user.getUserEmail();
655:                            if (BlojsomUtils.checkNullOrBlank(authorEmail)) {
656:                                authorEmail = blog.getBlogOwnerEmail();
657:                            }
658:                        }
659:                    } catch (FetcherException e) {
660:                    }
661:                }
662:
663:                email.addTo(authorEmail, author);
664:                email.setSentDate(new Date());
665:            }
666:
667:            /**
668:             * Handle an event broadcast from another component
669:             *
670:             * @param event {@link org.blojsom.event.Event} to be handled
671:             */
672:            public void handleEvent(Event event) {
673:                if (event instanceof  TrackbackAddedEvent) {
674:                    HtmlEmail email = new HtmlEmail();
675:
676:                    TrackbackAddedEvent trackbackAddedEvent = (TrackbackAddedEvent) event;
677:
678:                    if (trackbackAddedEvent.getBlog().getBlogEmailEnabled()
679:                            .booleanValue()) {
680:                        try {
681:                            setupEmail(trackbackAddedEvent.getBlog(),
682:                                    trackbackAddedEvent.getEntry(), email);
683:
684:                            Map emailTemplateContext = new HashMap();
685:                            emailTemplateContext.put(
686:                                    BlojsomConstants.BLOJSOM_BLOG,
687:                                    trackbackAddedEvent.getBlog());
688:                            emailTemplateContext.put(
689:                                    BLOJSOM_TRACKBACK_PLUGIN_TRACKBACK,
690:                                    trackbackAddedEvent.getTrackback());
691:                            emailTemplateContext.put(
692:                                    BLOJSOM_TRACKBACK_PLUGIN_BLOG_ENTRY,
693:                                    trackbackAddedEvent.getEntry());
694:
695:                            String htmlText = mergeTemplate(
696:                                    TRACKBACK_PLUGIN_EMAIL_TEMPLATE_HTML,
697:                                    trackbackAddedEvent.getBlog(),
698:                                    emailTemplateContext);
699:                            String plainText = mergeTemplate(
700:                                    TRACKBACK_PLUGIN_EMAIL_TEMPLATE_TEXT,
701:                                    trackbackAddedEvent.getBlog(),
702:                                    emailTemplateContext);
703:
704:                            email = email.setHtmlMsg(htmlText);
705:                            email = email.setTextMsg(plainText);
706:
707:                            String emailPrefix = (String) trackbackAddedEvent
708:                                    .getBlog().getProperties().get(
709:                                            TRACKBACK_PREFIX_IP);
710:                            if (BlojsomUtils.checkNullOrBlank(emailPrefix)) {
711:                                emailPrefix = DEFAULT_TRACKBACK_PREFIX;
712:                            }
713:
714:                            email = (HtmlEmail) email
715:                                    .setSubject(emailPrefix
716:                                            + trackbackAddedEvent.getEntry()
717:                                                    .getTitle());
718:
719:                            email.send();
720:                        } catch (EmailException e) {
721:                            if (_logger.isErrorEnabled()) {
722:                                _logger.error(e);
723:                            }
724:                        }
725:                    }
726:                }
727:            }
728:
729:            /**
730:             * Process an event from another component
731:             *
732:             * @param event {@link org.blojsom.event.Event} to be handled
733:             */
734:            public void processEvent(Event event) {
735:            }
736:        }
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