server/runtime/org.argeo.server.jackrabbit/src/main/java/org/argeo/jackrabbit/remote/SimpleSessionProvider.java

   1 /*
   2  * Copyright (C) 2007-2012 Mathieu Baudier
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.jackrabbit.remote;
  17
  18 import java.io.Serializable;
  19 import java.util.ArrayList;
  20 import java.util.Collections;
  21 import java.util.HashMap;
  22 import java.util.Iterator;
  23 import java.util.List;
  24 import java.util.Map;
  25
  26 import javax.jcr.LoginException;
  27 import javax.jcr.Node;
  28 import javax.jcr.Repository;
  29 import javax.jcr.RepositoryException;
  30 import javax.jcr.Session;
  31 import javax.jcr.Value;
  32 import javax.servlet.ServletException;
  33 import javax.servlet.http.HttpServletRequest;
  34
  35 import org.apache.commons.logging.Log;
  36 import org.apache.commons.logging.LogFactory;
  37 import org.apache.jackrabbit.api.JackrabbitSession;
  38 import org.apache.jackrabbit.api.security.user.Group;
  39 import org.apache.jackrabbit.api.security.user.User;
  40 import org.apache.jackrabbit.api.security.user.UserManager;
  41 import org.apache.jackrabbit.server.SessionProvider;
  42 import org.argeo.ArgeoException;
  43 import org.argeo.jcr.ArgeoNames;
  44 import org.argeo.jcr.JcrUtils;
  45 import org.argeo.jcr.UserJcrUtils;
  46
  47 /**
  48  * Implements an open session in view patter: a new JCR session is created for
  49  * each request
  50  */
  51 public class SimpleSessionProvider implements SessionProvider, Serializable {
  52         private static final long serialVersionUID = 2270957712453841368L;
  53
  54         private final static Log log = LogFactory
  55                         .getLog(SimpleSessionProvider.class);
  56
  57         private transient Map<String, Session> sessions;
  58
  59         private Boolean openSessionInView = true;
  60
  61         private String defaultWorkspace = "default";
  62
  63         public Session getSession(HttpServletRequest request, Repository rep,
  64                         String workspace) throws LoginException, ServletException,
  65                         RepositoryException {
  66
  67                 if (openSessionInView) {
  68                         JackrabbitSession session = (JackrabbitSession) rep
  69                                         .login(workspace);
  70                         if (session.getWorkspace().getName().equals(defaultWorkspace))
  71                                 writeRemoteRoles(session);
  72                         return session;
  73                 } else {
  74                         // since sessions is transient it can't be restored from the session
  75                         if (sessions == null)
  76                                 sessions = Collections
  77                                                 .synchronizedMap(new HashMap<String, Session>());
  78
  79                         if (!sessions.containsKey(workspace)) {
  80                                 try {
  81                                         JackrabbitSession session = (JackrabbitSession) rep.login(
  82                                                         null, workspace);
  83                                         if (session.getWorkspace().getName()
  84                                                         .equals(defaultWorkspace))
  85                                                 writeRemoteRoles(session);
  86                                         if (log.isTraceEnabled())
  87                                                 log.trace("User " + session.getUserID()
  88                                                                 + " logged into " + request.getServletPath());
  89                                         sessions.put(workspace, session);
  90                                         return session;
  91                                 } catch (Exception e) {
  92                                         throw new ArgeoException("Cannot open session", e);
  93                                 }
  94                         } else {
  95                                 Session session = sessions.get(workspace);
  96                                 if (!session.isLive()) {
  97                                         sessions.remove(workspace);
  98                                         session = rep.login(null, workspace);
  99                                         sessions.put(workspace, session);
 100                                 }
 101                                 return session;
 102                         }
 103                 }
 104         }
 105
 106         protected void writeRemoteRoles(JackrabbitSession session)
 107                         throws RepositoryException {
 108                 // FIXME better deal w/ non node repo
 109
 110                 // retrieve roles
 111                 String userId = session.getUserID();
 112                 UserManager userManager = session.getUserManager();
 113                 User user = (User) userManager.getAuthorizable(userId);
 114                 if (user == null) {
 115                         // anonymous
 116                         return;
 117                 }
 118                 List<String> userGroupIds = new ArrayList<String>();
 119                 if (user != null)
 120                         for (Iterator<Group> it = user.memberOf(); it.hasNext();)
 121                                 userGroupIds.add(it.next().getID());
 122
 123                 // write roles if needed
 124                 Node userHome = UserJcrUtils.getUserHome(session);
 125                 boolean writeRoles = false;
 126                 if (userHome.hasProperty(ArgeoNames.ARGEO_REMOTE_ROLES)) {
 127                         Value[] roles = userHome.getProperty(ArgeoNames.ARGEO_REMOTE_ROLES)
 128                                         .getValues();
 129                         if (roles.length != userGroupIds.size())
 130                                 writeRoles = true;
 131                         else
 132                                 for (int i = 0; i < roles.length; i++)
 133                                         if (!roles[i].getString().equals(userGroupIds.get(i)))
 134                                                 writeRoles = true;
 135                 } else
 136                         writeRoles = true;
 137
 138                 if (writeRoles) {
 139                         session.getWorkspace().getVersionManager()
 140                                         .checkout(userHome.getPath());
 141                         String[] roleIds = userGroupIds.toArray(new String[userGroupIds
 142                                         .size()]);
 143                         userHome.setProperty(ArgeoNames.ARGEO_REMOTE_ROLES, roleIds);
 144                         JcrUtils.updateLastModified(userHome);
 145                         session.save();
 146                         session.getWorkspace().getVersionManager()
 147                                         .checkin(userHome.getPath());
 148                 }
 149
 150         }
 151
 152         public void releaseSession(Session session) {
 153                 if (log.isTraceEnabled())
 154                         log.trace("Releasing JCR session " + session);
 155                 if (openSessionInView) {
 156                         if (session.isLive()) {
 157                                 session.logout();
 158                                 if (log.isTraceEnabled())
 159                                         log.trace("Logged out remote JCR session " + session);
 160                         }
 161                 }
 162         }
 163
 164         public void init() {
 165         }
 166
 167         public void destroy() {
 168                 if (sessions != null)
 169                         for (String workspace : sessions.keySet()) {
 170                                 Session session = sessions.get(workspace);
 171                                 if (session.isLive()) {
 172                                         session.logout();
 173                                         if (log.isDebugEnabled())
 174                                                 log.debug("Logged out remote JCR session " + session);
 175                                 }
 176                         }
 177         }
 178
 179         /**
 180          * If set to true a new session will be created each time (the default),
 181          * otherwise a single session is cached by workspace and the object should
 182          * be of scope session (not supported)
 183          */
 184         public void setOpenSessionInView(Boolean openSessionInView) {
 185                 this.openSessionInView = openSessionInView;
 186         }
 187
 188         public void setSecurityWorkspace(String securityWorkspace) {
 189                 this.defaultWorkspace = securityWorkspace;
 190         }
 191
 192 }