Jake Slack | 03928ae | 2014-05-13 18:41:56 -0700 | [diff] [blame] | 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 | } |