1 |
4080
|
daigle
|
/**
|
2 |
|
|
* '$RCSfile$'
|
3 |
|
|
* Purpose: A Class that implements session utility methods
|
4 |
|
|
* Copyright: 2008 Regents of the University of California and the
|
5 |
|
|
* National Center for Ecological Analysis and Synthesis
|
6 |
|
|
* Authors: Michael Daigle
|
7 |
|
|
*
|
8 |
|
|
* '$Author$'
|
9 |
|
|
* '$Date$'
|
10 |
|
|
* '$Revision$'
|
11 |
|
|
*
|
12 |
|
|
* This program is free software; you can redistribute it and/or modify
|
13 |
|
|
* it under the terms of the GNU General Public License as published by
|
14 |
|
|
* the Free Software Foundation; either version 2 of the License, or
|
15 |
|
|
* (at your option) any later version.
|
16 |
|
|
*
|
17 |
|
|
* This program is distributed in the hope that it will be useful,
|
18 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
19 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
20 |
|
|
* GNU General Public License for more details.
|
21 |
|
|
*
|
22 |
|
|
* You should have received a copy of the GNU General Public License
|
23 |
|
|
* along with this program; if not, write to the Free Software
|
24 |
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
25 |
|
|
*/
|
26 |
|
|
|
27 |
|
|
package edu.ucsb.nceas.metacat.service;
|
28 |
|
|
|
29 |
5041
|
daigle
|
import java.io.PrintWriter;
|
30 |
|
|
import java.util.Calendar;
|
31 |
5311
|
daigle
|
import java.util.Enumeration;
|
32 |
4080
|
daigle
|
import java.util.Hashtable;
|
33 |
|
|
|
34 |
5041
|
daigle
|
import javax.servlet.http.HttpServletResponse;
|
35 |
|
|
|
36 |
4080
|
daigle
|
import org.apache.log4j.Logger;
|
37 |
|
|
|
38 |
5041
|
daigle
|
import edu.ucsb.nceas.metacat.properties.PropertyService;
|
39 |
5015
|
daigle
|
import edu.ucsb.nceas.metacat.shared.BaseService;
|
40 |
|
|
import edu.ucsb.nceas.metacat.shared.ServiceException;
|
41 |
4080
|
daigle
|
import edu.ucsb.nceas.metacat.util.SessionData;
|
42 |
5041
|
daigle
|
import edu.ucsb.nceas.utilities.PropertyNotFoundException;
|
43 |
4080
|
daigle
|
|
44 |
4442
|
daigle
|
public class SessionService extends BaseService {
|
45 |
4080
|
daigle
|
|
46 |
|
|
private static SessionService sessionService = null;
|
47 |
5041
|
daigle
|
private static int sessionTimeoutMinutes;
|
48 |
4080
|
daigle
|
|
49 |
|
|
private static Logger logMetacat = Logger.getLogger(SessionService.class);
|
50 |
|
|
private static Hashtable<String, SessionData> sessionHash = null;
|
51 |
|
|
|
52 |
4297
|
daigle
|
private static final String PUBLIC_SESSION_ID = "0";
|
53 |
5311
|
daigle
|
|
54 |
|
|
private static Object lockObj = new Object();
|
55 |
4080
|
daigle
|
|
56 |
|
|
/**
|
57 |
|
|
* private constructor since this is a singleton
|
58 |
|
|
*/
|
59 |
5015
|
daigle
|
private SessionService() throws ServiceException {
|
60 |
|
|
_serviceName = "SessionService";
|
61 |
|
|
|
62 |
5041
|
daigle
|
String sessionTimeoutStr = null;
|
63 |
|
|
try {
|
64 |
|
|
sessionHash = new Hashtable<String, SessionData>();
|
65 |
|
|
sessionTimeoutStr = PropertyService.getProperty("session.timeoutMinutes");
|
66 |
|
|
sessionTimeoutMinutes = Integer.parseInt(sessionTimeoutStr);
|
67 |
|
|
|
68 |
|
|
logMetacat.debug("SessionService() - Registering public session id: " +
|
69 |
|
|
PUBLIC_SESSION_ID);
|
70 |
5070
|
daigle
|
registerSession(PUBLIC_SESSION_ID, "public", null, null, "Public User");
|
71 |
5041
|
daigle
|
} catch (PropertyNotFoundException pnfe) {
|
72 |
|
|
throw new ServiceException("SessionService() - Error getting property: " +
|
73 |
|
|
pnfe.getMessage());
|
74 |
|
|
} catch (NumberFormatException nfe) {
|
75 |
|
|
throw new ServiceException("SessionService() - Error parsing session timeout minutes: " +
|
76 |
|
|
sessionTimeoutStr);
|
77 |
|
|
}
|
78 |
4080
|
daigle
|
}
|
79 |
|
|
|
80 |
|
|
/**
|
81 |
4429
|
daigle
|
* Get the single instance of SessionService.
|
82 |
4080
|
daigle
|
*
|
83 |
4429
|
daigle
|
* @return the single instance of SessionService
|
84 |
4080
|
daigle
|
*/
|
85 |
4780
|
daigle
|
public static SessionService getInstance() throws ServiceException {
|
86 |
4080
|
daigle
|
if (sessionService == null) {
|
87 |
|
|
sessionService = new SessionService();
|
88 |
|
|
}
|
89 |
|
|
return sessionService;
|
90 |
|
|
}
|
91 |
4297
|
daigle
|
|
92 |
4442
|
daigle
|
public boolean refreshable() {
|
93 |
|
|
return false;
|
94 |
|
|
}
|
95 |
|
|
|
96 |
4981
|
daigle
|
public void doRefresh() throws ServiceException {
|
97 |
4442
|
daigle
|
return;
|
98 |
|
|
}
|
99 |
|
|
|
100 |
4981
|
daigle
|
public void stop() throws ServiceException {
|
101 |
|
|
return;
|
102 |
|
|
}
|
103 |
|
|
|
104 |
4297
|
daigle
|
/**
|
105 |
|
|
* Register a session in the session hash table. This uses
|
106 |
|
|
* the parameters passed in to create a SessionData object.
|
107 |
|
|
*
|
108 |
|
|
* @param sessionId
|
109 |
|
|
* the ID of the session to register
|
110 |
|
|
* @param userName
|
111 |
|
|
* the user name of the session
|
112 |
|
|
* @param groupNames
|
113 |
|
|
* the group names for the session
|
114 |
|
|
* @param password
|
115 |
|
|
* the password for the session
|
116 |
|
|
*/
|
117 |
4080
|
daigle
|
public static void registerSession(String sessionId, String userName,
|
118 |
5070
|
daigle
|
String[] groupNames, String password, String name) throws ServiceException {
|
119 |
5311
|
daigle
|
synchronized(lockObj) {
|
120 |
|
|
if (sessionId == null) {
|
121 |
|
|
throw new ServiceException("SessionService.registerSession - " +
|
122 |
|
|
"Cannot register a null session id");
|
123 |
|
|
}
|
124 |
|
|
logMetacat.debug("SessionService.registerSession - Registering session id: " + sessionId);
|
125 |
|
|
SessionData sessionData = new SessionData(sessionId, userName, groupNames,
|
126 |
|
|
password, name);
|
127 |
|
|
sessionHash.put(sessionId, sessionData);
|
128 |
4780
|
daigle
|
}
|
129 |
4080
|
daigle
|
}
|
130 |
|
|
|
131 |
4297
|
daigle
|
/**
|
132 |
|
|
* Register a session in the session hash table.
|
133 |
|
|
*
|
134 |
|
|
* @param sessionData
|
135 |
|
|
* the session data object to add to the session hash
|
136 |
|
|
*/
|
137 |
4780
|
daigle
|
public static void registerSession(SessionData sessionData) throws ServiceException {
|
138 |
5311
|
daigle
|
synchronized(lockObj) {
|
139 |
|
|
if (sessionData == null) {
|
140 |
|
|
throw new ServiceException("SessionService.registerSession - " +
|
141 |
|
|
"Cannot register null session data");
|
142 |
|
|
}
|
143 |
|
|
logMetacat.debug("SessionService.registerSession - Registering session " +
|
144 |
|
|
"data with id: " + sessionData.getId());
|
145 |
|
|
sessionHash.put(sessionData.getId(), sessionData);
|
146 |
4780
|
daigle
|
}
|
147 |
4080
|
daigle
|
}
|
148 |
|
|
|
149 |
4297
|
daigle
|
/**
|
150 |
|
|
* Unregister a session from the session hash table.
|
151 |
|
|
*
|
152 |
|
|
* @param sessionId
|
153 |
|
|
* the id of the session to remove.
|
154 |
|
|
*/
|
155 |
4080
|
daigle
|
public static void unRegisterSession(String sessionId) {
|
156 |
5311
|
daigle
|
synchronized(lockObj) {
|
157 |
|
|
if (sessionId == null) {
|
158 |
|
|
logMetacat.error("SessionService.unRegisterSession - trying to " +
|
159 |
5041
|
daigle
|
"unregister a session with null id");
|
160 |
5311
|
daigle
|
}
|
161 |
|
|
|
162 |
|
|
logMetacat.info("SessionService.unRegisterSession - unRegistering session: " + sessionId);
|
163 |
|
|
sessionHash.remove(sessionId);
|
164 |
4780
|
daigle
|
}
|
165 |
4080
|
daigle
|
}
|
166 |
|
|
|
167 |
4297
|
daigle
|
/**
|
168 |
5311
|
daigle
|
* Unregister all sessions from the session hash table except the public session.
|
169 |
|
|
*
|
170 |
|
|
* @param sessionId
|
171 |
|
|
* the id of the session to remove.
|
172 |
|
|
*/
|
173 |
|
|
public static void unRegisterAllSessions() {
|
174 |
|
|
synchronized(lockObj) {
|
175 |
|
|
Enumeration<String> keyEnum = sessionHash.keys();
|
176 |
|
|
while (keyEnum.hasMoreElements()) {
|
177 |
|
|
String sessionId = keyEnum.nextElement();
|
178 |
|
|
if (!sessionId.equals(PUBLIC_SESSION_ID)) {
|
179 |
|
|
logMetacat.info("SessionService.unRegisterAllSessions - unRegistering session: " + sessionId);
|
180 |
|
|
sessionHash.remove(sessionId);
|
181 |
|
|
}
|
182 |
|
|
}
|
183 |
|
|
}
|
184 |
|
|
}
|
185 |
|
|
|
186 |
|
|
/**
|
187 |
4297
|
daigle
|
* Check if a session is registered in the session hash table.
|
188 |
|
|
*
|
189 |
|
|
* @param sessionId
|
190 |
|
|
* the id of the session to look for.
|
191 |
|
|
*/
|
192 |
5041
|
daigle
|
public static boolean isSessionRegistered(String sessionId) {
|
193 |
4780
|
daigle
|
if (sessionId == null) {
|
194 |
5041
|
daigle
|
logMetacat.error("SessionService.isSessionRegistered - trying to check if a " +
|
195 |
|
|
"session with null id is registered");
|
196 |
4780
|
daigle
|
return false;
|
197 |
|
|
}
|
198 |
5041
|
daigle
|
|
199 |
|
|
checkTimeout(sessionId);
|
200 |
|
|
|
201 |
4080
|
daigle
|
return sessionHash.containsKey(sessionId);
|
202 |
|
|
}
|
203 |
|
|
|
204 |
4297
|
daigle
|
/**
|
205 |
5041
|
daigle
|
* Check if a session is registered in the session hash table. Write results
|
206 |
|
|
* in XML format to output.
|
207 |
|
|
*
|
208 |
|
|
* @param out
|
209 |
|
|
* the output stream to write to.
|
210 |
|
|
* @param sessionId
|
211 |
|
|
* the id of the session to look for.
|
212 |
|
|
*/
|
213 |
|
|
public static void validateSession(PrintWriter out, HttpServletResponse response,
|
214 |
|
|
String sessionId) {
|
215 |
|
|
|
216 |
|
|
response.setContentType("text/xml");
|
217 |
|
|
out.println("<?xml version=\"1.0\"?>");
|
218 |
|
|
out.write("<validateSession><status>");
|
219 |
5070
|
daigle
|
if (validateSession(sessionId)) {
|
220 |
5041
|
daigle
|
out.write("valid");
|
221 |
|
|
} else {
|
222 |
|
|
out.write("invalid");
|
223 |
|
|
}
|
224 |
|
|
out.write("</status>");
|
225 |
|
|
out.write("<sessionId>" + sessionId + "</sessionId></validateSession>");
|
226 |
|
|
}
|
227 |
|
|
|
228 |
|
|
/**
|
229 |
5070
|
daigle
|
* Check if a session is registered in the session hash table. Return
|
230 |
|
|
* true if the session is valid and false otherwise.
|
231 |
|
|
*
|
232 |
|
|
* @param sessionId
|
233 |
|
|
* the id of the session to look for.
|
234 |
|
|
*/
|
235 |
|
|
public static boolean validateSession(String sessionId) {
|
236 |
|
|
if (sessionId != null && !sessionId.equals(PUBLIC_SESSION_ID) && isSessionRegistered(sessionId)) {
|
237 |
|
|
return true;
|
238 |
|
|
} else {
|
239 |
|
|
return false;
|
240 |
|
|
}
|
241 |
|
|
}
|
242 |
|
|
|
243 |
|
|
/**
|
244 |
4297
|
daigle
|
* Get a registered session from the session hash table.
|
245 |
|
|
* TODO MCD need to time sessions out
|
246 |
|
|
*
|
247 |
|
|
* @param sessionId
|
248 |
|
|
* the id of the session to retrieve.
|
249 |
|
|
*/
|
250 |
4080
|
daigle
|
public static SessionData getRegisteredSession(String sessionId) {
|
251 |
4780
|
daigle
|
if (sessionId == null) {
|
252 |
5041
|
daigle
|
logMetacat.error("SessionService.getRegisteredSession - trying to get a session with null id");
|
253 |
4780
|
daigle
|
return null;
|
254 |
|
|
}
|
255 |
5041
|
daigle
|
checkTimeout(sessionId);
|
256 |
|
|
|
257 |
4080
|
daigle
|
return sessionHash.get(sessionId);
|
258 |
|
|
}
|
259 |
|
|
|
260 |
4297
|
daigle
|
/**
|
261 |
|
|
* Get the public session from the session hash table.
|
262 |
|
|
*/
|
263 |
|
|
public static SessionData getPublicSession() {
|
264 |
|
|
return sessionHash.get(PUBLIC_SESSION_ID);
|
265 |
4080
|
daigle
|
}
|
266 |
|
|
|
267 |
4297
|
daigle
|
/**
|
268 |
|
|
* Keep a session active by updating its last accessed time.
|
269 |
|
|
*
|
270 |
|
|
* @param sessionId
|
271 |
|
|
* the id of the session to update.
|
272 |
|
|
*/
|
273 |
4080
|
daigle
|
public static synchronized void touchSession(String sessionId) {
|
274 |
4780
|
daigle
|
if (sessionId == null) {
|
275 |
5041
|
daigle
|
logMetacat.error("SessionService.touchSession - trying to touch a session with null id");
|
276 |
4780
|
daigle
|
} else if (isSessionRegistered(sessionId)) {
|
277 |
5311
|
daigle
|
synchronized(lockObj) {
|
278 |
|
|
SessionData sessionData = getRegisteredSession(sessionId);
|
279 |
|
|
sessionData.setLastAccessedTime();
|
280 |
|
|
}
|
281 |
4080
|
daigle
|
}
|
282 |
|
|
}
|
283 |
5041
|
daigle
|
|
284 |
|
|
private static void checkTimeout (String sessionId) {
|
285 |
|
|
SessionData sessionData = null;
|
286 |
|
|
if ((sessionData = sessionHash.get(sessionId)) != null) {
|
287 |
|
|
Calendar expireTime = Calendar.getInstance();
|
288 |
|
|
Calendar lastAccessedTime = sessionData.getLastAccessedTime();
|
289 |
|
|
expireTime.add(Calendar.MINUTE, 0 - sessionTimeoutMinutes);
|
290 |
|
|
if(lastAccessedTime.compareTo(expireTime) < 0 ) {
|
291 |
|
|
unRegisterSession(sessionId);
|
292 |
|
|
}
|
293 |
5311
|
daigle
|
}
|
294 |
5041
|
daigle
|
}
|
295 |
4080
|
daigle
|
|
296 |
|
|
}
|