Source Code Cross Referenced for RimfaxeHttpSession.java in  » Web-Server » Rimfaxe-Web-Server » com » rimfaxe » webserver » servletapi » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Server » Rimfaxe Web Server » com.rimfaxe.webserver.servletapi 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * RimfaxeHttpSession.java
003:         *
004:         *
005:         * Copyright (c) 2003 Rimfaxe ApS  (www.rimfaxe.com).  
006:         * All rights reserved.
007:         *
008:         * This package is written by Lars Andersen <lars@rimfaxe.com> 
009:         * and licensed by Rimfaxe ApS.
010:         *
011:         * Redistribution and use in source and binary forms, with or without
012:         * modification, are permitted provided that the following conditions
013:         * are met:
014:         *
015:         * 1. Redistributions of source code must retain the above copyright
016:         *    notice, this list of conditions and the following disclaimer.
017:         *
018:         * 2. Redistributions in binary form must reproduce the above copyright
019:         *    notice, this list of conditions and the following disclaimer in
020:         *    the documentation and/or other materials provided with the
021:         *    distribution.
022:         *
023:         * 3. The end-user documentation included with the redistribution, if
024:         *    any, must include the following acknowlegement:
025:         *       "This product includes software developed by Rimfaxe ApS
026:                  (www.rimfaxe.com)"
027:         *    Alternately, this acknowlegement may appear in the software itself,
028:         *    if and wherever such third-party acknowlegements normally appear.
029:         *
030:         * 4. The names "Rimfaxe", "Rimfaxe Software", "Lars Andersen" and 
031:         *    "Rimfaxe WebServer" must not be used to endorse or promote products 
032:         *    derived from this software without prior written permission. For written
033:         *    permission, please contact info@rimfaxe.com
034:         *
035:         * 5. Products derived from this software may not be called "Rimfaxe"
036:         *    nor may "Rimfaxe" appear in their names without prior written
037:         *    permission of the Rimfaxe ApS.
038:         *
039:         * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
040:         * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
041:         * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
042:         * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
043:         * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
044:         * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
045:         * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
046:         * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
047:         * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
048:         * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
049:         * SUCH DAMAGE.
050:         *
051:         */
052:
053:        package com.rimfaxe.webserver.servletapi;
054:
055:        import javax.servlet.http.Cookie;
056:        import javax.servlet.http.HttpSession;
057:        import javax.servlet.http.HttpSessionBindingEvent;
058:        import javax.servlet.http.HttpSessionBindingListener;
059:        import javax.servlet.http.HttpSessionContext;
060:
061:        import java.util.Enumeration;
062:        import java.util.Hashtable;
063:
064:        import com.rimfaxe.webserver.VirtualHost;
065:
066:        public class RimfaxeHttpSession implements  HttpSession {
067:
068:            private VirtualHost virtualhost;
069:            private com.rimfaxe.webserver.WebContext webcontext;
070:
071:            private String id = null;
072:
073:            private long creationTime = -1;
074:            private long lastAccessedTime = -1;
075:
076:            //private boolean isValid = false;
077:            private boolean isNew = false;
078:
079:            private Cookie cookie = null;
080:
081:            private Hashtable values = null;
082:
083:            private int maxidle = 30 * 60; // default 30 minutes 
084:
085:            /**
086:             * Returns the identifier assigned to this session. An HttpSession's 
087:             * identifier is a unique string that is created and maintained by
088:             * HttpSessionContext. 
089:             * @return the identifier assigned to this session 
090:             */
091:            public String getId() {
092:                return id;
093:            }
094:
095:            /**
096:             * Returns the context in which this session is bound. 
097:             * @return the context in which this session is bound.
098:             * @deprecated since jsdk2.1
099:             * IGNORE
100:             */
101:            public HttpSessionContext getSessionContext() {
102:                return null;
103:            }
104:
105:            public javax.servlet.ServletContext getServletContext() {
106:                return (javax.servlet.ServletContext) webcontext
107:                        .getServletContext();
108:            }
109:
110:            /**
111:             * Returns the object bound with the specified name in this session, or
112:             * <code>null</code> if no object is bound under the name.
113:             * @param name a string specifying the name of the object
114:             * @return the object with the specified name
115:             */
116:            public Object getAttribute(String name) {
117:                return getValue(name);
118:            }
119:
120:            /**
121:             * Returns an <code>Enumeration</code> of <code>String</code> objects
122:             * containing the names of all the objects bound to this session. 
123:             * @return an <code>Enumeration</code> of <code>String</code> objects 
124:             * specifying the names of all the objects bound to	this session
125:             */
126:            public Enumeration getAttributeNames() {
127:                return values.keys();
128:            }
129:
130:            /**
131:             * Binds an object to this session, using the name specified.
132:             * If an object of the same name is already bound to the session,
133:             * the object is replaced.
134:             *
135:             * <p>After this method executes, and if the object
136:             * implements <code>HttpSessionBindingListener</code>,
137:             * the container calls 
138:             * <code>HttpSessionBindingListener.valueBound</code>.
139:             *
140:             * @param name the name to which the object is bound; cannot be null
141:             * @param value the object to be bound; cannot be null
142:             */
143:            public void setAttribute(String name, Object value) {
144:                putValue(name, value);
145:            }
146:
147:            /**
148:             * Removes the object bound with the specified name from
149:             * this session. If the session does not have an object
150:             * bound with the specified name, this method does nothing.
151:             *
152:             * <p>After this method executes, and if the object
153:             * implements <code>HttpSessionBindingListener</code>,
154:             * the container calls 
155:             * <code>HttpSessionBindingListener.valueUnbound</code>.
156:             * 
157:             * @param name the name of the object to remove from this session
158:             */
159:            public void removeAttribute(String name) {
160:                removeValue(name);
161:            }
162:
163:            /**
164:             * Returns the time at which this session representation was created, 
165:             * in milliseconds since midnight, January 1, 1970 UTC. 
166:             * @return the time when the session was created 
167:             */
168:            public long getCreationTime() {
169:                return creationTime;
170:            }
171:
172:            /**
173:             * Returns the last time the client sent a request carrying the identifier
174:             * assigned to the session. Time is expressed as milliseconds
175:             * since midnight, January 1, 1970 UTC. Application level operations, 
176:             * such as getting or setting a value associated with the session,
177:             * does not affect the access time. 
178:             * @return the last time the client sent a request carrying the identifier
179:             * assigned to the session. 
180:             */
181:            public long getLastAccessedTime() {
182:                return lastAccessedTime;
183:            }
184:
185:            public void setLastAccessedTime() {
186:                lastAccessedTime = System.currentTimeMillis();
187:            }
188:
189:            /**
190:             * Causes this representation of the session to be invalidated and removed
191:             * from its context.
192:             */
193:            public void invalidate() {
194:
195:                Enumeration names = values.keys();
196:                while (names.hasMoreElements()) {
197:                    String name = (String) (names.nextElement());
198:                    removeValue(name);
199:                }
200:
201:                this .virtualhost.getSessionStore().removeSessionObject(id);
202:
203:            }
204:
205:            /**
206:             * Returns the object bound to the given name in the session's application
207:             * layer data. Returns null if there is no such binding. 
208:             * @param name - the name of the binding to find 
209:             * @return the value bound to that name, or null if the binding does 
210:             * not exist. 
211:             */
212:            public Object getValue(String name) {
213:
214:                return values.get(name);
215:            }
216:
217:            /**
218:             * Binds the specified object into the session's application layer data 
219:             * with the given name. Any existing binding with the same name
220:             * is replaced. New (or existing) values that implement the 
221:             * HttpSessionBindingListener interface will call its valueBound() method. 
222:             * @param name - the name to which the data object will be bound. 
223:             * This parameter cannot be null. 
224:             * @param value - the data object to be bound. This parameter cannot 
225:             * be null. 
226:             */
227:            public void putValue(String name, Object value) {
228:                removeValue(name);
229:                // null check added in accordance with servlet api, tk. 23.10.2001
230:                if (value != null) {
231:                    values.put(name, value);
232:                    if (value instanceof  HttpSessionBindingListener)
233:                        valueBound((HttpSessionBindingListener) value, name);
234:                }
235:            }
236:
237:            /**
238:             * Removes the object bound to the given name in the session's application
239:             * layer data. Does nothing if there is no object bound to the
240:             * given name. The value that implements the HttpSessionBindingListener 
241:             * interface will call its valueUnbound() method. 
242:             * @param name - the name of the object to remove 
243:             *
244:             */
245:            public void removeValue(String name) {
246:
247:                Object value = values.get(name);
248:                if (value != null) {
249:                    values.remove(name);
250:                    if (value instanceof  HttpSessionBindingListener)
251:                        valueUnbound((HttpSessionBindingListener) value, name);
252:                }
253:            }
254:
255:            protected void valueBound(HttpSessionBindingListener value,
256:                    String name) {
257:                value.valueBound(new HttpSessionBindingEvent(this , name));
258:            }
259:
260:            protected void valueUnbound(HttpSessionBindingListener value,
261:                    String name) {
262:                value.valueUnbound(new HttpSessionBindingEvent(this , name));
263:            }
264:
265:            /**
266:             * Returns an array of the names of all the application layer data objects
267:             * bound into the session. For example, if you want to delete
268:             * all of the data objects bound into the session, use this method to 
269:             * obtain their names. 
270:             * @return an array containing the names of all of the application layer
271:             * data objects bound into the session 
272:             *
273:             */
274:            public String[] getValueNames() 
275:    {
276:	
277:	String names[] = new String[values.size()];
278:	Enumeration enum = values.keys();
279:	int i = 0;
280:	while (enum.hasMoreElements())
281:	    names[i++] = (String)enum.nextElement();
282:	return names;
283:    }
284:
285:            /**
286:             * A session is considered to be "new" if it has been created by the 
287:             * server, but the client has not yet acknowledged joining the
288:             * session. For example, if the server supported only cookie-based 
289:             * sessions and the client had completely disabled the use of
290:             * cookies, then calls to HttpServletRequest.getSession() would always 
291:             * return "new" sessions. 
292:             * @return true if the session has been created by the server but the 
293:             * client has not yet acknowledged joining the session; false otherwise 
294:             *
295:             */
296:            public boolean isNew() {
297:                return isNew;
298:            }
299:
300:            protected void setNoMoreNew() {
301:                isNew = false;
302:            }
303:
304:            protected boolean isValid() {
305:                return true;
306:            }
307:
308:            protected Cookie getCookie() {
309:                return cookie;
310:            }
311:
312:            public void setMaxInactiveInterval(int interval) {
313:                maxidle = interval;
314:            }
315:
316:            public int getMaxInactiveInterval() {
317:                return maxidle;
318:            }
319:
320:            public void setID(String id) {
321:                this .id = id;
322:            }
323:
324:            public boolean hasExpired() {
325:
326:                long now = System.currentTimeMillis();
327:                long expiration = lastAccessedTime + (maxidle * 1000);
328:
329:                //System.out.println("Session age = "+(now-lastAccessedTime));
330:
331:                if (expiration < now) {
332:                    //System.out.println("Session has expired"); 
333:                    return true;
334:                }
335:                return false;
336:            }
337:
338:            public RimfaxeHttpSession(Cookie cookie,
339:                    com.rimfaxe.webserver.WebContext ctx) {
340:                this .values = new Hashtable();
341:                this .creationTime = System.currentTimeMillis();
342:                this .lastAccessedTime = creationTime;
343:                this .cookie = cookie;
344:
345:                isNew = true;
346:                this.virtualhost = ctx.getVirtualHost();
347:                this.webcontext = ctx;
348:
349:                maxidle = ctx.getSessionExpirationInterval();
350:            }
351:
352:        }
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