001    /**
002     * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portlet.wiki.util;
016    
017    import com.liferay.portal.kernel.cache.MultiVMPoolUtil;
018    import com.liferay.portal.kernel.cache.PortalCache;
019    import com.liferay.portal.kernel.log.Log;
020    import com.liferay.portal.kernel.log.LogFactoryUtil;
021    import com.liferay.portal.kernel.util.StringBundler;
022    import com.liferay.portal.kernel.util.StringPool;
023    import com.liferay.portlet.wiki.PageContentException;
024    import com.liferay.portlet.wiki.model.WikiPage;
025    import com.liferay.portlet.wiki.model.WikiPageDisplay;
026    import com.liferay.portlet.wiki.service.WikiPageLocalServiceUtil;
027    
028    import java.util.Map;
029    
030    import javax.portlet.PortletURL;
031    
032    import org.apache.commons.lang.time.StopWatch;
033    
034    /**
035     * @author Jorge Ferrer
036     */
037    public class WikiCacheUtil {
038    
039            public static final String CACHE_NAME = WikiCacheUtil.class.getName();
040    
041            public static void clearCache(long nodeId) {
042                    _portalCache.removeAll();
043            }
044    
045            public static void clearCache(long nodeId, String title) {
046                    clearCache(nodeId);
047            }
048    
049            public static WikiPageDisplay getDisplay(
050                    long nodeId, String title, PortletURL viewPageURL,
051                    PortletURL editPageURL, String attachmentURLPrefix) {
052    
053                    StopWatch stopWatch = null;
054    
055                    if (_log.isDebugEnabled()) {
056                            stopWatch = new StopWatch();
057    
058                            stopWatch.start();
059                    }
060    
061                    String key = _encodeKey(nodeId, title, viewPageURL.toString());
062    
063                    WikiPageDisplay pageDisplay = (WikiPageDisplay)_portalCache.get(key);
064    
065                    if (pageDisplay == null) {
066                            pageDisplay = _getPageDisplay(
067                                    nodeId, title, viewPageURL, editPageURL, attachmentURLPrefix);
068    
069                            _portalCache.put(key, pageDisplay);
070                    }
071    
072                    if (_log.isDebugEnabled()) {
073                            _log.debug(
074                                    "getDisplay for {" + nodeId + ", " + title + ", " +
075                                            viewPageURL + ", " + editPageURL + "} takes " +
076                                                    stopWatch.getTime() + " ms");
077                    }
078    
079                    return pageDisplay;
080            }
081    
082            public static Map<String, Boolean> getOutgoingLinks(WikiPage page)
083                    throws PageContentException {
084    
085                    String key = _encodeKey(
086                            page.getNodeId(), page.getTitle(), _OUTGOING_LINKS);
087    
088                    Map<String, Boolean> links = (Map<String, Boolean>)_portalCache.get(
089                            key);
090    
091                    if (links == null) {
092                            links = WikiUtil.getLinks(page);
093    
094                            _portalCache.put(key, links);
095                    }
096    
097                    return links;
098            }
099    
100            private static String _encodeKey(
101                    long nodeId, String title, String postfix) {
102    
103                    StringBundler sb = new StringBundler(6);
104    
105                    sb.append(CACHE_NAME);
106                    sb.append(StringPool.POUND);
107                    sb.append(nodeId);
108                    sb.append(title);
109    
110                    if (postfix != null) {
111                            sb.append(StringPool.POUND);
112                            sb.append(postfix);
113                    }
114    
115                    return sb.toString();
116            }
117    
118            private static WikiPageDisplay _getPageDisplay(
119                    long nodeId, String title, PortletURL viewPageURL,
120                    PortletURL editPageURL, String attachmentURLPrefix) {
121    
122                    try {
123                            if (_log.isInfoEnabled()) {
124                                    _log.info(
125                                            "Get page display for {" + nodeId + ", " + title + ", " +
126                                                    viewPageURL + ", " + editPageURL + "}");
127                            }
128    
129                            return WikiPageLocalServiceUtil.getPageDisplay(
130                                    nodeId, title, viewPageURL, editPageURL, attachmentURLPrefix);
131                    }
132                    catch (Exception e) {
133                            if (_log.isWarnEnabled()) {
134                                    _log.warn(
135                                            "Unable to get page display for {" + nodeId + ", " + title +
136                                                    ", " + viewPageURL + ", " + editPageURL + "}");
137                            }
138    
139                            return null;
140                    }
141            }
142    
143            private static final String _OUTGOING_LINKS = "OUTGOING_LINKS";
144    
145            private static Log _log = LogFactoryUtil.getLog(WikiUtil.class);
146    
147            private static PortalCache _portalCache = MultiVMPoolUtil.getCache(
148                    CACHE_NAME);
149    
150    }