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.blojsom.plugin.Plugin;
033: import org.blojsom.plugin.PluginException;
034: import org.blojsom.blog.Blog;
035: import org.blojsom.blog.Entry;
036: import org.blojsom.fetcher.Fetcher;
037: import org.blojsom.fetcher.FetcherException;
038: import org.apache.commons.logging.Log;
039: import org.apache.commons.logging.LogFactory;
040:
041: import javax.servlet.http.HttpServletRequest;
042: import javax.servlet.http.HttpServletResponse;
043: import java.util.Map;
044:
045: /**
046: * Recent Trackbacks plugin
047: *
048: * @author David Czarnecki
049: * @since blojsom 3.0
050: * @version $Id: RecentTrackbacksPlugin.java,v 1.2 2007/01/17 02:35:14 czarneckid Exp $
051: */
052: public class RecentTrackbacksPlugin implements Plugin {
053:
054: private Log _logger = LogFactory
055: .getLog(RecentTrackbacksPlugin.class);
056:
057: private static final String BLOJSOM_PLUGIN_RECENT_TRACKBACKS = "BLOJSOM_PLUGIN_RECENT_TRACKBACKS";
058:
059: private Fetcher _fetcher;
060:
061: /**
062: * Create a new instance of the Recent Comments plugin
063: */
064: public RecentTrackbacksPlugin() {
065: }
066:
067: /**
068: * Set the {@link Fetcher}
069: *
070: * @param fetcher {@link Fetcher}
071: */
072: public void setFetcher(Fetcher fetcher) {
073: _fetcher = fetcher;
074: }
075:
076: /**
077: * Initialize this plugin. This method only called when the plugin is instantiated.
078: *
079: * @throws PluginException If there is an error initializing the plugin
080: */
081: public void init() throws PluginException {
082: }
083:
084: /**
085: * Process the blog entries
086: *
087: * @param httpServletRequest Request
088: * @param httpServletResponse Response
089: * @param blog {@link Blog} instance
090: * @param context Context
091: * @param entries Blog entries retrieved for the particular request
092: * @return Modified set of blog entries
093: * @throws PluginException If there is an error processing the blog entries
094: */
095: public Entry[] process(HttpServletRequest httpServletRequest,
096: HttpServletResponse httpServletResponse, Blog blog,
097: Map context, Entry[] entries) throws PluginException {
098: try {
099: context.put(BLOJSOM_PLUGIN_RECENT_TRACKBACKS, _fetcher
100: .loadRecentTrackbacks(blog));
101: } catch (FetcherException e) {
102: if (_logger.isErrorEnabled()) {
103: _logger.error(e);
104: }
105: }
106:
107: return entries;
108: }
109:
110: /**
111: * Perform any cleanup for the plugin. Called after {@link #process}.
112: *
113: * @throws PluginException If there is an error performing cleanup for this plugin
114: */
115: public void cleanup() throws PluginException {
116: }
117:
118: /**
119: * Called when BlojsomServlet is taken out of service
120: *
121: * @throws PluginException If there is an error in finalizing this plugin
122: */
123: public void destroy() throws PluginException {
124: }
125: }
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