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comparison src/org/eclipse/jetty/server/session/HashedSession.java @ 802:3428c60d7cfc

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replace jetty jars with source
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 07 Sep 2016 21:15:48 -0600
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801:6a21393191c1 802:3428c60d7cfc
1 //
2 // ========================================================================
3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.server.session;
20
21 import java.io.DataOutputStream;
22 import java.io.File;
23 import java.io.FileInputStream;
24 import java.io.FileNotFoundException;
25 import java.io.FileOutputStream;
26 import java.io.IOException;
27 import java.io.ObjectOutputStream;
28 import java.io.OutputStream;
29 import java.util.Enumeration;
30
31 import javax.servlet.http.HttpServletRequest;
32
33 import org.eclipse.jetty.util.IO;
34 import org.eclipse.jetty.util.log.Log;
35 import org.eclipse.jetty.util.log.Logger;
36
37 public class HashedSession extends AbstractSession
38 {
39 private static final Logger LOG = Log.getLogger(HashedSession.class);
40
41 private final HashSessionManager _hashSessionManager;
42
43 /** Whether the session has been saved because it has been deemed idle;
44 * in which case its attribute map will have been saved and cleared. */
45 private transient boolean _idled = false;
46
47 /** Whether there has already been an attempt to save this session
48 * which has failed. If there has, there will be no more save attempts
49 * for this session. This is to stop the logs being flooded with errors
50 * due to serialization failures that are most likely caused by user
51 * data stored in the session that is not serializable. */
52 private transient boolean _saveFailed = false;
53
54 /* ------------------------------------------------------------- */
55 protected HashedSession(HashSessionManager hashSessionManager, HttpServletRequest request)
56 {
57 super(hashSessionManager,request);
58 _hashSessionManager = hashSessionManager;
59 }
60
61 /* ------------------------------------------------------------- */
62 protected HashedSession(HashSessionManager hashSessionManager, long created, long accessed, String clusterId)
63 {
64 super(hashSessionManager,created, accessed, clusterId);
65 _hashSessionManager = hashSessionManager;
66 }
67
68 /* ------------------------------------------------------------- */
69 protected void checkValid()
70 {
71 if (_hashSessionManager._idleSavePeriodMs!=0)
72 deIdle();
73 super.checkValid();
74 }
75
76 /* ------------------------------------------------------------- */
77 @Override
78 public void setMaxInactiveInterval(int secs)
79 {
80 super.setMaxInactiveInterval(secs);
81 if (getMaxInactiveInterval()>0&&(getMaxInactiveInterval()*1000L/10)<_hashSessionManager._scavengePeriodMs)
82 _hashSessionManager.setScavengePeriod((secs+9)/10);
83 }
84
85 /* ------------------------------------------------------------ */
86 @Override
87 protected void doInvalidate()
88 throws IllegalStateException
89 {
90 super.doInvalidate();
91
92 // Remove from the disk
93 if (_hashSessionManager._storeDir!=null && getId()!=null)
94 {
95 String id=getId();
96 File f = new File(_hashSessionManager._storeDir, id);
97 f.delete();
98 }
99 }
100
101 /* ------------------------------------------------------------ */
102 synchronized void save(boolean reactivate)
103 throws Exception
104 {
105 // Only idle the session if not already idled and no previous save/idle has failed
106 if (!isIdled() && !_saveFailed)
107 {
108 if (LOG.isDebugEnabled())
109 LOG.debug("Saving {} {}",super.getId(),reactivate);
110
111 File file = null;
112 FileOutputStream fos = null;
113
114 try
115 {
116 file = new File(_hashSessionManager._storeDir, super.getId());
117
118 if (file.exists())
119 file.delete();
120 file.createNewFile();
121 fos = new FileOutputStream(file);
122 willPassivate();
123 save(fos);
124 IO.close(fos);
125 if (reactivate)
126 didActivate();
127 else
128 clearAttributes();
129 }
130 catch (Exception e)
131 {
132 saveFailed(); // We won't try again for this session
133 if (fos != null) IO.close(fos);
134 if (file != null) file.delete(); // No point keeping the file if we didn't save the whole session
135 throw e;
136 }
137 }
138 }
139 /* ------------------------------------------------------------ */
140 public synchronized void save(OutputStream os) throws IOException
141 {
142 DataOutputStream out = new DataOutputStream(os);
143 out.writeUTF(getClusterId());
144 out.writeUTF(getNodeId());
145 out.writeLong(getCreationTime());
146 out.writeLong(getAccessed());
147
148 /* Don't write these out, as they don't make sense to store because they
149 * either they cannot be true or their value will be restored in the
150 * Session constructor.
151 */
152 //out.writeBoolean(_invalid);
153 //out.writeBoolean(_doInvalidate);
154 //out.writeLong(_maxIdleMs);
155 //out.writeBoolean( _newSession);
156 out.writeInt(getRequests());
157 out.writeInt(getAttributes());
158 ObjectOutputStream oos = new ObjectOutputStream(out);
159 Enumeration<String> e=getAttributeNames();
160 while(e.hasMoreElements())
161 {
162 String key=e.nextElement();
163 oos.writeUTF(key);
164 oos.writeObject(doGet(key));
165 }
166 oos.close();
167 }
168
169 /* ------------------------------------------------------------ */
170 public synchronized void deIdle()
171 {
172 if (isIdled())
173 {
174 // Access now to prevent race with idling period
175 access(System.currentTimeMillis());
176
177 if (LOG.isDebugEnabled())
178 LOG.debug("De-idling " + super.getId());
179
180 FileInputStream fis = null;
181
182 try
183 {
184 File file = new File(_hashSessionManager._storeDir, super.getId());
185 if (!file.exists() || !file.canRead())
186 throw new FileNotFoundException(file.getName());
187
188 fis = new FileInputStream(file);
189 _idled = false;
190 _hashSessionManager.restoreSession(fis, this);
191 IO.close(fis);
192
193 didActivate();
194
195 // If we are doing period saves, then there is no point deleting at this point
196 if (_hashSessionManager._savePeriodMs == 0)
197 file.delete();
198 }
199 catch (Exception e)
200 {
201 LOG.warn("Problem de-idling session " + super.getId(), e);
202 if (fis != null) IO.close(fis);//Must ensure closed before invalidate
203 invalidate();
204 }
205 }
206 }
207
208
209 /* ------------------------------------------------------------ */
210 /**
211 * Idle the session to reduce session memory footprint.
212 *
213 * The session is idled by persisting it, then clearing the session values attribute map and finally setting
214 * it to an idled state.
215 */
216 public synchronized void idle()
217 throws Exception
218 {
219 save(false);
220 _idled = true;
221 }
222
223 /* ------------------------------------------------------------ */
224 public synchronized boolean isIdled()
225 {
226 return _idled;
227 }
228
229 /* ------------------------------------------------------------ */
230 public synchronized boolean isSaveFailed()
231 {
232 return _saveFailed;
233 }
234
235 /* ------------------------------------------------------------ */
236 public synchronized void saveFailed()
237 {
238 _saveFailed = true;
239 }
240
241 }