Source Code Cross Referenced for HttpSession.java in  » Content-Management-System » apache-lenya-2.0 » org » apache » cocoon » environment » http » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Content Management System » apache lenya 2.0 » org.apache.cocoon.environment.http 
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:        package org.apache.cocoon.environment.http;
018:
019:        import org.apache.cocoon.environment.Session;
020:
021:        import java.util.Enumeration;
022:
023:        /**
024:         *
025:         * Provides a way to identify a user across more than one page
026:         * request or visit to a Web site and to store information about that user.
027:         *
028:         * <p>Cocoon uses this interface to create a session
029:         * between a client and the "cocoon server". The session persists
030:         * for a specified time period, across more than one connection or
031:         * page request from the user. A session usually corresponds to one
032:         * user, who may visit a site many times. The server can maintain a
033:         * session in many ways such as using cookies or rewriting URLs.
034:         *
035:         * <p>This interface allows Cocoon to
036:         * <ul>
037:         * <li>View and manipulate information about a session, such as
038:         *     the session identifier, creation time, and last accessed time
039:         * <li>Bind objects to sessions, allowing user information to persist
040:         *     across multiple user connections
041:         * </ul>
042:         *
043:         * <p>Session information is scoped only to the current context
044:         * (<code>Context</code>), so information stored in one context
045:         * will not be directly visible in another.
046:         *
047:         * @author <a href="mailto:cziegeler@apache.org">Carsten Ziegeler</a>
048:         * @version CVS $Id: HttpSession.java 433543 2006-08-22 06:22:54Z crossley $
049:         *
050:         */
051:
052:        public final class HttpSession implements  Session {
053:
054:            javax.servlet.http.HttpSession wrappedSession;
055:
056:            /**
057:             * Construct a new session from an HttpSession
058:             */
059:            public HttpSession(javax.servlet.http.HttpSession session) {
060:                this .wrappedSession = session;
061:            }
062:
063:            /**
064:             *
065:             * Returns the time when this session was created, measured
066:             * in milliseconds since midnight January 1, 1970 GMT.
067:             *
068:             * @return                                a <code>long</code> specifying
069:             *                                         when this session was created,
070:             *                                        expressed in
071:             *                                        milliseconds since 1/1/1970 GMT
072:             *
073:             * @exception IllegalStateException        if this method is called on an
074:             *                                        invalidated session
075:             *
076:             */
077:            public long getCreationTime() {
078:                return this .wrappedSession.getCreationTime();
079:            }
080:
081:            /**
082:             *
083:             * Returns a string containing the unique identifier assigned
084:             * to this session. The identifier is assigned
085:             * by the context container and is implementation dependent.
086:             *
087:             * @return                                a string specifying the identifier
088:             *                                        assigned to this session
089:             *
090:             * @exception IllegalStateException        if this method is called on an
091:             *                                        invalidated session
092:             *
093:             */
094:            public String getId() {
095:                return this .wrappedSession.getId();
096:            }
097:
098:            /**
099:             *
100:             * Returns the last time the client sent a request associated with
101:             * this session, as the number of milliseconds since midnight
102:             * January 1, 1970 GMT.
103:             *
104:             * <p>Actions that your application takes, such as getting or setting
105:             * a value associated with the session, do not affect the access
106:             * time.
107:             *
108:             * @return                                a <code>long</code>
109:             *                                        representing the last time
110:             *                                        the client sent a request associated
111:             *                                        with this session, expressed in
112:             *                                        milliseconds since 1/1/1970 GMT
113:             *
114:             * @exception IllegalStateException        if this method is called on an
115:             *                                        invalidated session
116:             *
117:             */
118:
119:            public long getLastAccessedTime() {
120:                return this .wrappedSession.getLastAccessedTime();
121:            }
122:
123:            /**
124:             *
125:             * Specifies the time, in seconds, between client requests before the
126:             * contextcontainer will invalidate this session.  A negative time
127:             * indicates the session should never timeout.
128:             *
129:             * @param interval                An integer specifying the number
130:             *                                 of seconds
131:             *
132:             */
133:            public void setMaxInactiveInterval(int interval) {
134:                this .wrappedSession.setMaxInactiveInterval(interval);
135:            }
136:
137:            /**
138:             * Returns the maximum time interval, in seconds, that
139:             * the context container will keep this session open between
140:             * client accesses. After this interval, the context container
141:             * will invalidate the session.  The maximum time interval can be set
142:             * with the <code>setMaxInactiveInterval</code> method.
143:             * A negative time indicates the session should never timeout.
144:             *
145:             *
146:             * @return                an integer specifying the number of
147:             *                        seconds this session remains open
148:             *                        between client requests
149:             *
150:             * @see                #setMaxInactiveInterval(int)
151:             *
152:             *
153:             */
154:            public int getMaxInactiveInterval() {
155:                return this .wrappedSession.getMaxInactiveInterval();
156:            }
157:
158:            /**
159:             *
160:             * Returns the object bound with the specified name in this session, or
161:             * <code>null</code> if no object is bound under the name.
162:             *
163:             * @param name                a string specifying the name of the object
164:             *
165:             * @return                        the object with the specified name
166:             *
167:             * @exception IllegalStateException        if this method is called on an
168:             *                                        invalidated session
169:             *
170:             */
171:            public Object getAttribute(String name) {
172:                return this .wrappedSession.getAttribute(name);
173:            }
174:
175:            /**
176:             *
177:             * Returns an <code>Enumeration</code> of <code>String</code> objects
178:             * containing the names of all the objects bound to this session.
179:             *
180:             * @return                        an <code>Enumeration</code> of
181:             *                                <code>String</code> objects specifying the
182:             *                                names of all the objects bound to
183:             *                                this session
184:             *
185:             * @exception IllegalStateException        if this method is called on an
186:             *                                        invalidated session
187:             *
188:             */
189:            public Enumeration getAttributeNames() {
190:                return this .wrappedSession.getAttributeNames();
191:            }
192:
193:            /**
194:             * Binds an object to this session, using the name specified.
195:             * If an object of the same name is already bound to the session,
196:             * the object is replaced.
197:             *
198:             *
199:             * @param name                        the name to which the object is bound;
200:             *                                        cannot be null
201:             *
202:             * @param value                        the object to be bound; cannot be null
203:             *
204:             * @exception IllegalStateException        if this method is called on an
205:             *                                        invalidated session
206:             *
207:             */
208:            public void setAttribute(String name, Object value) {
209:                this .wrappedSession.setAttribute(name, value);
210:            }
211:
212:            /**
213:             *
214:             * Removes the object bound with the specified name from
215:             * this session. If the session does not have an object
216:             * bound with the specified name, this method does nothing.
217:             *
218:             *
219:             * @param name                                the name of the object to
220:             *                                                remove from this session
221:             *
222:             * @exception IllegalStateException        if this method is called on an
223:             *                                        invalidated session
224:             */
225:            public void removeAttribute(String name) {
226:                this .wrappedSession.removeAttribute(name);
227:            }
228:
229:            /**
230:             *
231:             * Invalidates this session
232:             * to it.
233:             *
234:             * @exception IllegalStateException        if this method is called on an
235:             *                                        already invalidated session
236:             *
237:             */
238:            public void invalidate() {
239:                this .wrappedSession.invalidate();
240:            }
241:
242:            /**
243:             *
244:             * Returns <code>true</code> if the client does not yet know about the
245:             * session or if the client chooses not to join the session.  For
246:             * example, if the server used only cookie-based sessions, and
247:             * the client had disabled the use of cookies, then a session would
248:             * be new on each request.
249:             *
250:             * @return                                 <code>true</code> if the
251:             *                                        server has created a session,
252:             *                                        but the client has not yet joined
253:             *
254:             * @exception IllegalStateException        if this method is called on an
255:             *                                        already invalidated session
256:             *
257:             */
258:            public boolean isNew() {
259:                return this.wrappedSession.isNew();
260:            }
261:
262:        }
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