Source Code Cross Referenced for EhPortletContentCacheImpl.java in  » Portal » jetspeed-2.1.3 » org » apache » jetspeed » cache » impl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Portal » jetspeed 2.1.3 » org.apache.jetspeed.cache.impl 
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.jetspeed.cache.impl;
019:
020:        import java.util.Collections;
021:        import java.util.HashMap;
022:        import java.util.Iterator;
023:        import java.util.Map;
024:        import java.util.StringTokenizer;
025:
026:        import net.sf.ehcache.Ehcache;
027:        import net.sf.ehcache.Element;
028:
029:        import org.apache.jetspeed.cache.CacheElement;
030:        import org.apache.jetspeed.cache.ContentCacheElement;
031:        import org.apache.jetspeed.cache.ContentCacheKey;
032:        import org.apache.jetspeed.cache.ContentCacheKeyGenerator;
033:        import org.apache.jetspeed.cache.JetspeedCache;
034:        import org.apache.jetspeed.cache.JetspeedCacheEventListener;
035:        import org.apache.jetspeed.cache.JetspeedContentCache;
036:        import org.apache.jetspeed.decoration.Theme;
037:        import org.apache.jetspeed.request.RequestContext;
038:
039:        /**
040:         * Wrapper around actual cache implementation
041:         * 
042:         * @author <a href="mailto:taylor@apache.org">David Sean Taylor</a>
043:         * @version $Id: $
044:         */
045:        public class EhPortletContentCacheImpl extends EhCacheImpl implements 
046:                JetspeedContentCache, JetspeedCacheEventListener {
047:
048:            JetspeedCache preferenceCache = null;
049:            ContentCacheKeyGenerator keyGenerator = null;
050:
051:            public EhPortletContentCacheImpl(Ehcache ehcache,
052:                    JetspeedCache preferenceCache,
053:                    ContentCacheKeyGenerator keyGenerator) {
054:                this (ehcache);
055:                this .preferenceCache = preferenceCache;
056:                this .keyGenerator = keyGenerator;
057:                preferenceCache.addEventListener(this , false); //only listen to remote events
058:            }
059:
060:            public EhPortletContentCacheImpl(Ehcache ehcache,
061:                    JetspeedCache preferenceCache) {
062:                this (ehcache);
063:                this .preferenceCache = preferenceCache;
064:                preferenceCache.addEventListener(this , false); //only listen to remote events
065:            }
066:
067:            public EhPortletContentCacheImpl(Ehcache ehcache) {
068:                super (ehcache);
069:            }
070:
071:            public EhPortletContentCacheImpl(Ehcache ehcache,
072:                    ContentCacheKeyGenerator keyGenerator) {
073:                this (ehcache);
074:                this .keyGenerator = keyGenerator;
075:            }
076:
077:            public void notifyElementAdded(JetspeedCache cache, boolean local,
078:                    Object key, Object element) {
079:            }
080:
081:            public void notifyElementChanged(JetspeedCache cache,
082:                    boolean local, Object key, Object element) {
083:            }
084:
085:            public void notifyElementEvicted(JetspeedCache cache,
086:                    boolean local, Object key, Object element) {
087:            }
088:
089:            public void notifyElementExpired(JetspeedCache cache,
090:                    boolean local, Object key, Object element) {
091:                notifyElementRemoved(cache, local, key, element);
092:            }
093:
094:            public static final String KEY_ENTITY_KEY = EhPortletContentCacheElementImpl.KEY_SEPARATOR
095:                    + "portlet_entity"
096:                    + EhPortletContentCacheElementImpl.KEY_SEPARATOR;
097:            public static final int KEY_ENTITY_KEY_LENGTH = KEY_ENTITY_KEY
098:                    .length();
099:
100:            public void notifyElementRemoved(JetspeedCache cache,
101:                    boolean local, Object key, Object element) {
102:                if (local)
103:                    return; // not interested in local changes
104:
105:                // System.out.println("notifying PortletContent that element " +
106:                // key.toString() + " has been removed");
107:                if (!(key instanceof  String))
108:                    return;
109:                String s = (String) key;
110:                if (!(s.startsWith(KEY_ENTITY_KEY)))
111:                    return;
112:                StringTokenizer st = new StringTokenizer(s,
113:                        EhPortletContentCacheElementImpl.KEY_SEPARATOR);
114:                int count = 0;
115:                String pe = null;
116:                String user = null;
117:                while (st.hasMoreTokens()) {
118:                    String temp = st.nextToken();
119:                    switch (count) {
120:                    case 0:
121:                        break;
122:                    case 1:
123:                        pe = temp;
124:                        break;
125:                    case 2:
126:                        user = temp;
127:                        break;
128:                    }
129:                    count++;
130:                    if (count > 2)
131:                        break;
132:                }
133:                if ((pe != null) && (user != null)) {
134:                    removeUserEntry(user, "portal", pe);
135:                    removeUserEntry(user, "desktop", pe);
136:                }
137:            }
138:
139:            void removeUserEntry(String username, String pipeline,
140:                    String windowId) {
141:                ContentCacheKey key = keyGenerator.createUserCacheKey(username,
142:                        pipeline, windowId);
143:                if (ehcache.remove(key.getKey())) {
144:                    Element userElement = ehcache.get(username);
145:
146:                    if (userElement != null) {
147:                        Map map = (Map) userElement.getObjectValue();
148:                        if (map != null) {
149:                            map.remove(windowId);
150:                        }
151:                    }
152:                }
153:            }
154:
155:            public CacheElement get(Object key) {
156:                ContentCacheKey cckey = (ContentCacheKey) key;
157:                Element element = ehcache.get(cckey.getKey());
158:                if (element == null)
159:                    return null;
160:                return new EhPortletContentCacheElementImpl(element, cckey);
161:            }
162:
163:            public int getTimeToIdleSeconds() {
164:                return (int) ehcache.getTimeToIdleSeconds();
165:            }
166:
167:            public int getTimeToLiveSeconds() {
168:                return (int) ehcache.getTimeToLiveSeconds();
169:            }
170:
171:            public boolean isKeyInCache(Object key) {
172:                ContentCacheKey cckey = (ContentCacheKey) key;
173:                return ehcache.isKeyInCache(cckey.getKey());
174:            }
175:
176:            public void put(CacheElement element) {
177:                ContentCacheElement ccElement = (ContentCacheElement) element;
178:                EhPortletContentCacheElementImpl impl = (EhPortletContentCacheElementImpl) element;
179:                Element ehl = impl.getImplElement();
180:                String userKey = ccElement.getContentCacheKey().getSessionId();
181:                if (userKey == null) {
182:                    userKey = ccElement.getContentCacheKey().getUsername();
183:                }
184:                String windowId = ccElement.getContentCacheKey().getWindowId();
185:                try {
186:                    ehcache.put(ehl);
187:                } catch (Exception e) {
188:                    e.printStackTrace();
189:                }
190:                Element userElement = ehcache.get(userKey);
191:                if (userElement == null) {
192:                    Map map = Collections.synchronizedMap(new HashMap());
193:                    map.put(windowId, ccElement.getContentCacheKey());
194:                    userElement = new Element(userKey, map);
195:                    ehcache.put(userElement);
196:                } else {
197:                    Map map = (Map) userElement.getObjectValue();
198:                    map.put(windowId, ccElement.getContentCacheKey());
199:                }
200:            }
201:
202:            public CacheElement createElement(Object key, Object content) {
203:                ContentCacheKey cckey = (ContentCacheKey) key;
204:                Element cachedElement = new Element(cckey.getKey(), content);
205:                return new EhPortletContentCacheElementImpl(cachedElement,
206:                        cckey);
207:            }
208:
209:            public boolean remove(Object key) {
210:                CacheElement element = this .get(key);
211:                boolean removed = false;
212:                if (element == null)
213:                    return false;
214:
215:                ContentCacheElement ccElement = (ContentCacheElement) element;
216:                EhPortletContentCacheElementImpl impl = (EhPortletContentCacheElementImpl) element;
217:                Element ehl = impl.getImplElement();
218:                String userKey = ccElement.getContentCacheKey().getSessionId();
219:                if (userKey == null) {
220:                    userKey = ccElement.getContentCacheKey().getUsername();
221:                }
222:                String windowId = ccElement.getContentCacheKey().getWindowId();
223:                removed = ehcache.remove(ccElement.getContentCacheKey()
224:                        .getKey());
225:                Element userElement = ehcache.get(userKey);
226:                if (userElement != null) {
227:                    Map map = (Map) userElement.getObjectValue();
228:                    if (map != null) {
229:                        map.remove(windowId);
230:                    }
231:                }
232:                return removed;
233:            }
234:
235:            public void evictContentForUser(String username) {
236:                Element userElement = saveGet(username);
237:                if (userElement != null) {
238:                    Map map = (Map) userElement.getObjectValue();
239:                    if (map != null) {
240:                        Iterator entities = map.values().iterator();
241:                        while (entities.hasNext()) {
242:                            ContentCacheKey ccKey = (ContentCacheKey) entities
243:                                    .next();
244:                            ehcache.remove(ccKey.getKey());
245:                        }
246:                    }
247:                    ehcache.remove(username);
248:                }
249:            }
250:
251:            public void evictContentForSession(String session) {
252:                Element userElement = saveGet(session);
253:                if (userElement != null) {
254:                    Map map = (Map) userElement.getObjectValue();
255:                    if (map != null) {
256:                        Iterator entities = map.values().iterator();
257:                        while (entities.hasNext()) {
258:                            ContentCacheKey ccKey = (ContentCacheKey) entities
259:                                    .next();
260:                            ehcache.remove(ccKey.getKey());
261:                        }
262:                    }
263:                    ehcache.remove(session);
264:                }
265:            }
266:
267:            public void clear() {
268:                ehcache.removeAll();
269:            }
270:
271:            public ContentCacheKey createCacheKey(RequestContext context,
272:                    String windowId) {
273:                return this .keyGenerator.createCacheKey(context, windowId);
274:            }
275:
276:            protected Element saveGet(Object key) {
277:                try {
278:                    return ehcache.get(key);
279:                } catch (IllegalStateException ise) {
280:                    // can be thrown during shutdown for instance
281:                    return null;
282:                }
283:            }
284:
285:            public String createSessionKey(RequestContext context) {
286:                boolean isAjaxRequest = (context == null);
287:                String mode = isAjaxRequest ? "-d-" : "-p-";
288:                String user = context.getRequest().getRemoteUser();
289:                if (user == null)
290:                    user = "guest";
291:                return user + mode + context.getPage().getId();
292:            }
293:
294:            public void invalidate(RequestContext context) {
295:                String themeCacheKey = createSessionKey(context);
296:                Theme theme = (Theme) context.getRequest().getSession()
297:                        .getAttribute(themeCacheKey);
298:                if (theme != null) {
299:                    theme.setInvalidated(true);
300:                }
301:            }
302:        }
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