Source Code Cross Referenced for PSDesktopContextFactory.java in  » Portal » Open-Portal » com » sun » portal » desktop » context » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Portal » Open Portal » com.sun.portal.desktop.context 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* 
002:         * Copyright 2001 Sun Microsystems, Inc.  All rights reserved. 
003:         * PROPRIETARY/CONFIDENTIAL.  Use of this product is subject to license terms. 
004:         */
005:        package com.sun.portal.desktop.context;
006:
007:        import com.sun.portal.desktop.ubt.DesktopEvents;
008:        import com.sun.portal.desktop.ubt.ProviderLogRecord;
009:        import com.sun.portal.log.common.PortalLogger;
010:        import com.sun.portal.ubt.UBTEvent;
011:        import com.sun.portal.ubt.UBTLogField;
012:        import com.sun.portal.ubt.UBTLogManager;
013:
014:        import javax.servlet.ServletContext;
015:        import javax.servlet.http.HttpServletRequest;
016:        import java.util.HashMap;
017:        import java.util.HashSet;
018:        import java.util.Iterator;
019:        import java.util.Map;
020:        import java.util.Set;
021:        import java.util.logging.Level;
022:        import java.util.logging.Logger;
023:
024:        public class PSDesktopContextFactory implements  DesktopContextFactory,
025:                SessionListener, PSContextConstants {
026:            //
027:            // TBD: should this be configurable?
028:            // regardless, 5 minutes is to too short
029:            //
030:            private static final long REAP_INTERVAL = 300000;
031:
032:            private HashMap desktopContexts = new HashMap();
033:            private DesktopContextReaper dcReaper = null;
034:
035:            protected DesktopAppContext desktopAppContext = null;
036:            protected ServletContext initConfig = null;
037:
038:            // Create a logger for this class
039:            private static Logger debugLogger = PortalLogger
040:                    .getLogger(PSDesktopContextFactory.class);
041:
042:            private static class DesktopContextCacheElement {
043:                private DesktopContext desktopContext = null;
044:                private long expiresTime = -1;
045:
046:                private DesktopContextCacheElement() {
047:                }
048:
049:                public DesktopContextCacheElement(
050:                        DesktopContext desktopContext, int expires) {
051:                    this .desktopContext = desktopContext;
052:                    if (expires != -1) {
053:                        this .expiresTime = System.currentTimeMillis()
054:                                + (expires * 1000);
055:                    }
056:                }
057:
058:                public DesktopContextCacheElement(DesktopContext desktopContext) {
059:                    this (desktopContext, -1);
060:                }
061:
062:                public DesktopContext getDesktopContext() {
063:                    return desktopContext;
064:                }
065:
066:                public long getExpiresTime() {
067:                    return expiresTime;
068:                }
069:            }
070:
071:            private class DesktopContextReaper {
072:                private Map desktopContexts = null;
073:                private long reapInterval;
074:                private long lastReap = -1;
075:
076:                public DesktopContextReaper(Map desktopContexts,
077:                        long reapInterval) {
078:                    this .desktopContexts = desktopContexts;
079:                    this .reapInterval = reapInterval;
080:                }
081:
082:                public void reap() {
083:                    long now = System.currentTimeMillis();
084:                    if (now > lastReap + reapInterval) {
085:                        lastReap = now;
086:                        debugLogger.fine("PSDT_CSPDC0021");
087:                        Set removeKeys = new HashSet();
088:                        for (Iterator i = desktopContexts.keySet().iterator(); i
089:                                .hasNext();) {
090:                            String sid = (String) i.next();
091:                            DesktopContextCacheElement dcce = (DesktopContextCacheElement) desktopContexts
092:                                    .get(sid);
093:                            if (dcce.getExpiresTime() != -1
094:                                    && now > dcce.getExpiresTime()) {
095:                                removeKeys.add(sid);
096:                            }
097:                        }
098:                        for (Iterator i = removeKeys.iterator(); i.hasNext();) {
099:                            String sid = (String) i.next();
100:                            desktopContexts.remove(sid);
101:                            debugLogger.log(Level.INFO, "PSDT_CSPDC0022", sid);
102:                        }
103:                    }
104:                }
105:            }
106:
107:            public PSDesktopContextFactory() {
108:                // nothing
109:            }
110:
111:            public void init(ServletContext sc) {
112:                initConfig = sc;
113:                initDesktopAppContext();
114:
115:                //
116:                // the creation and starting of the reaper thread
117:                // is disabled per bug #4720290. see this bug report
118:                // for details
119:                //
120:                //startDesktopContextReaper();
121:
122:                dcReaper = new DesktopContextReaper(desktopContexts,
123:                        REAP_INTERVAL);
124:            }
125:
126:            /*
127:            protected void startDesktopContextReaper() {
128:            DesktopContextReaper reaper = new DesktopContextReaper(this);
129:            reaper.start();
130:            }
131:             */
132:
133:            public DesktopAppContext getDesktopAppContext() {
134:                if (desktopAppContext == null) {
135:                    throw new ContextError(
136:                            "PSDesktopContextFactory.getDesktopAppContext(): not initialized");
137:                }
138:
139:                DesktopAppContextThreadLocalizer.set(desktopAppContext);
140:                return desktopAppContext;
141:            }
142:
143:            protected synchronized void initDesktopAppContext() {
144:                String desktopAppContextClassName = initConfig
145:                        .getInitParameter(SC_APP_CONTEXT_CLASSNAME);
146:                if (desktopAppContextClassName == null) {
147:                    throw new ContextError(
148:                            "PSDesktopContextFactory.getDesktopAppContext(): could not get desktop app context class name");
149:                }
150:
151:                try {
152:                    desktopAppContext = (DesktopAppContext) (Class
153:                            .forName(desktopAppContextClassName).newInstance());
154:                    desktopAppContext.init(initConfig);
155:                } catch (ClassNotFoundException cnfe) {
156:                    throw new ContextError(
157:                            "PSDesktopContextFactory.getDesktopAppContext(): ",
158:                            cnfe);
159:                } catch (NoClassDefFoundError ncdfe) {
160:                    throw new ContextError(
161:                            "PSDesktopContextFactory.getDesktopAppContext(): ",
162:                            ncdfe);
163:                } catch (IllegalAccessException iae) {
164:                    throw new ContextError(
165:                            "PSDesktopContextFactory.getDesktopAppContext(): ",
166:                            iae);
167:                } catch (ClassCastException cce) {
168:                    throw new ContextError(
169:                            "PSDesktopContextFactory.getDesktopAppContext(): ",
170:                            cce);
171:                } catch (InstantiationException ie) {
172:                    throw new ContextError(
173:                            "PSDesktopContextFactory.getDesktopAppContext(): ",
174:                            ie);
175:                } catch (SecurityException se) {
176:                    throw new ContextError(
177:                            "PSDesktopContextFactory.getDesktopAppContext(): ",
178:                            se);
179:                }
180:            }
181:
182:            public synchronized void releaseDesktopContexts(Set sessionIDs) {
183:                for (Iterator i = sessionIDs.iterator(); i.hasNext();) {
184:                    String sid = (String) i.next();
185:                    if (desktopContexts.containsKey(sid)) {
186:                        desktopContexts.remove(sid);
187:                    }
188:                }
189:            }
190:
191:            // BEGIN CR6344207
192:
193:            // Note:  getDesktopContext(...) was changed to remove the initialization of
194:            //        a DesktopContext object out of a critical section that all
195:            //        requests could potentially block on.  DesktopContext.init()
196:            //        resulted in LDAP activity that could potentially hang, and
197:            //        thus block all future requests.  So..., this was removed from
198:            //        a global critical section.
199:
200:            public DesktopContext getDesktopContext(HttpServletRequest req) {
201:                return getDesktopContext(req, -1);
202:            }
203:
204:            public DesktopContext getDesktopContext(HttpServletRequest req,
205:                    int expires) {
206:                return getDesktopContext(req, expires, true);
207:            }
208:
209:            public DesktopContext getDesktopContext(HttpServletRequest req,
210:                    int expires, boolean create) {
211:
212:                DesktopContext context = null;
213:                String sid = desktopAppContext.getSessionID(req);
214:
215:                synchronized (desktopContexts) {
216:
217:                    dcReaper.reap();
218:
219:                    DesktopContextCacheElement dcce = (DesktopContextCacheElement) desktopContexts
220:                            .get(sid);
221:
222:                    if (dcce != null) {
223:                        if (dcce.getDesktopContext().getIsStale()) {
224:                            //synchronized (desktopContexts) {
225:                            desktopContexts.remove(sid);
226:                            //}
227:                        } else {
228:                            context = dcce.getDesktopContext();
229:                        }
230:                    }
231:
232:                    if (context == null && create) {
233:                        //
234:                        // could not find in cache
235:                        // create a new one
236:                        //
237:                        String desktopContextClassName = desktopAppContext
238:                                .getDesktopContextClassName();
239:
240:                        try {
241:                            context = (DesktopContext) (Class
242:                                    .forName(desktopContextClassName)
243:                                    .newInstance());
244:
245:                            //
246:                            // put the new object into the cache
247:                            //
248:                            dcce = new DesktopContextCacheElement(context,
249:                                    expires);
250:                            desktopContexts.put(sid, dcce);
251:                        } catch (ClassNotFoundException cnfe) {
252:                            throw new ContextError(
253:                                    "PSDesktopContextFactory.getDesktopContext(): ",
254:                                    cnfe);
255:                        } catch (NoClassDefFoundError ncdfe) {
256:                            throw new ContextError(
257:                                    "PSDesktopContextFactory.getDesktopContext(): ",
258:                                    ncdfe);
259:                        } catch (IllegalAccessException iae) {
260:                            throw new ContextError(
261:                                    "PSDesktopContextFactory.getDesktopContext(): ",
262:                                    iae);
263:                        } catch (ClassCastException cce) {
264:                            throw new ContextError(
265:                                    "PSDesktopContextFactory.getDesktopContext(): ",
266:                                    cce);
267:                        } catch (InstantiationException ie) {
268:                            throw new ContextError(
269:                                    "PSDesktopContextFactory.getDesktopContext(): ",
270:                                    ie);
271:                        } catch (SecurityException se) {
272:                            throw new ContextError(
273:                                    "PSDesktopContextFactory.getDesktopContext(): ",
274:                                    se);
275:                        }
276:                    }
277:                }
278:
279:                if (context != null) {
280:                    synchronized (context) {
281:                        try {
282:                            if (!context.isInitDone()) {
283:                                context.init(req);
284:                                context.addSessionListener(this );
285:
286:                                //UBT code - start
287:                                try {
288:                                    UBTLogManager manager = UBTLogManager
289:                                            .getInstance();
290:                                    if (manager.isUBTEnabled()) {
291:                                        UBTEvent prov_ren = UBTEvent
292:                                                .getInstance(DesktopEvents.SESSION_START);
293:                                        prov_ren.put(UBTLogField.ACTION,
294:                                                "Login");
295:                                        manager.logEvent(new ProviderLogRecord(
296:                                                prov_ren, req, null, context
297:                                                        .getUserID()));
298:                                    }
299:                                } catch (Exception e) {
300:                                    //ubt exception
301:                                }
302:                                //UBT code - end
303:                            }
304:                        } catch (Exception e) {
305:                            throw new ContextError(
306:                                    "PSDesktopContextFactory.getDesktopContext(): ",
307:                                    e);
308:                        }
309:
310:                        context.setLastAccess(System.currentTimeMillis());
311:
312:                        DesktopContextThreadLocalizer.set(context);
313:                    }
314:                }
315:
316:                return context;
317:            }
318:
319:            // END CR6344207
320:
321:            //
322:            // the creation and starting of the reaper thread
323:            // is disabled per bug #4720290. see this bug report
324:            // for details
325:            //
326:            /*
327:            public void reapDesktopContexts(long maxInactive) {
328:            DesktopContext context  = null;
329:            HashMap        smap     = null;
330:
331:            synchronized (desktopContexts) { 
332:                smap = (HashMap)desktopContexts.clone();
333:            }
334:
335:            for (Iterator it = smap.keySet().iterator(); it.hasNext(); ) { 
336:                String sid = (String)it.next();
337:                DesktopContext dc = (DesktopContext)smap.get(sid);
338:
339:                if (dc == null) {
340:            	//desktopAppContext.debugError("PSDesktopContextFactory.reapDesktopContexts(): no desktop context found for sid=" + sid);		
341:                } else {
342:            	long now = System.currentTimeMillis();
343:            	long durInactive = now - dc.getLastAccess();
344:            	
345:            	//desktopAppContext.debugError("PSDesktopContextFactory.reapDesktopContexts(): durInactive=" + durInactive + " for sid=" + sid);
346:            	if (durInactive > maxInactive) {
347:            	    synchronized (desktopContexts) { 
348:            		desktopContexts.remove(sid);
349:            	    }
350:            	    //desktopAppContext.debugError("PSDesktopContextFactory.reapDesktopContexts(): removed desktop context for sid=" + sid);
351:            	}
352:                } 
353:            }
354:            }
355:             */
356:
357:            public synchronized void sessionDestroyed(SessionEvent se) {
358:                String sid = se.getSessionID();
359:                //UBT code - start
360:                try {
361:                    UBTLogManager manager = UBTLogManager.getInstance();
362:                    if (manager.isUBTEnabled()) {
363:                        UBTEvent prov_ren = UBTEvent
364:                                .getInstance(DesktopEvents.SESSION_TERMINATE);
365:                        prov_ren.put(UBTLogField.ACTION, "Logout");
366:                        manager.logEvent(new ProviderLogRecord(prov_ren, null,
367:                                null,
368:                                ((DesktopContextCacheElement) desktopContexts
369:                                        .get(sid)).getDesktopContext()
370:                                        .getUserID()));
371:                    }
372:                } catch (Exception e) {
373:                    //ubt exception
374:                }
375:                //UBT code - end
376:
377:                desktopContexts.remove(sid);
378:
379:            }
380:
381:            //
382:            // the creation and starting of the reaper thread
383:            // is disabled per bug #4720290. see this bug report
384:            // for details.
385:            /*
386:            class DesktopContextReaper extends Thread {
387:            private DesktopContextFactory factory = null;
388:            private DesktopAppContext dac = null;
389:
390:            public DesktopContextReaper(DesktopContextFactory factory) {
391:                this.factory = factory;
392:                this.dac = factory.getDesktopAppContext();
393:                setDaemon(true);
394:            }
395:
396:            public void run() {
397:                while (true) {
398:            	try {
399:            	    long maxInactive = dac.getInactiveMax();
400:            	    factory.reapDesktopContexts(maxInactive * 1000);
401:
402:            	    long interval = dac.getReapInterval();
403:
404:            	    synchronized (this) {
405:            		sleep(interval * 1000);
406:            	    }
407:            	} catch (Throwable t) {
408:            	    dac.debugError("DesktopContextReaper.run()", t);
409:            	}
410:                }
411:            }
412:            }
413:             */
414:        }
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