8 files changed, 225 insertions, 281 deletions

diff --git a/src/Common/Backends/NetworkUserBackend.cpp b/src/Common/Backends/NetworkUserBackend.cpp
index 6296581..39f4e5b 100644
--- a/src/Common/Backends/NetworkUserBackend.cpp
+++ b/src/Common/Backends/NetworkUserBackend.cpp
@@ -26,6 +26,8 @@ namespace Mad {
 namespace Common {
 namespace Backends {
 
+const std::string NetworkUserBackend::name("NetworkUserBackend");
+
 void NetworkUserBackend::SimpleUserRequest::sendRequest() {
   XmlPacket packet;
   packet.setType(type);
diff --git a/src/Common/Backends/NetworkUserBackend.h b/src/Common/Backends/NetworkUserBackend.h
index 0567514..6c0e94d 100644
--- a/src/Common/Backends/NetworkUserBackend.h
+++ b/src/Common/Backends/NetworkUserBackend.h
@@ -20,14 +20,14 @@
 #ifndef MAD_COMMON_BACKENDS_NETWORKUSERBACKEND_H_
 #define MAD_COMMON_BACKENDS_NETWORKUSERBACKEND_H_
 
-#include "../UserBackend.h"
+#include "../UserDBBackend.h"
 #include "../Request.h"
 
 namespace Mad {
 namespace Common {
 namespace Backends {
 
-class NetworkUserBackend : public UserBackend {
+class NetworkUserBackend : public UserDBBackend {
   private:
     class SimpleUserRequest : public Request {
       private:
@@ -110,6 +110,8 @@ class NetworkUserBackend : public UserBackend {
         : Request(application), type(type0), uid(uid0), gid(gid0) {}
     };
 
+    static const std::string name;
+
     Application *application;
     Connection *connection;
 
@@ -137,6 +139,10 @@ class NetworkUserBackend : public UserBackend {
 
   public:
     NetworkUserBackend(Application *application0, Connection *connection0) : application(application0), connection(connection0) {}
+
+    virtual const std::string& getName() {
+      return name;
+    }
 };
 
 }
diff --git a/src/Common/CMakeLists.txt b/src/Common/CMakeLists.txt
index 1ac7e69..e8e3152 100644
--- a/src/Common/CMakeLists.txt
+++ b/src/Common/CMakeLists.txt
@@ -20,7 +20,8 @@ add_library(Common
   RequestManager.cpp RequestManager.h
   SystemBackend.h
   SystemManager.cpp SystemManager.h
-  UserBackend.h
+  UserConfigBackend.h
+  UserDBBackend.h
   UserCache.cpp UserCache.h
   UserInfo.h
   UserManager.cpp UserManager.h
diff --git a/src/Common/UserCache.h b/src/Common/UserCache.h
index 1425908..ff70520 100644
--- a/src/Common/UserCache.h
+++ b/src/Common/UserCache.h
@@ -20,7 +20,7 @@
 #ifndef MAD_COMMON_USERCACHE_H_
 #define MAD_COMMON_USERCACHE_H_
 
-#include "UserBackend.h"
+#include "UserDBBackend.h"
 
 #include <limits>
 
@@ -32,13 +32,13 @@ namespace Common {
 class Application;
 class UserManager;
 
-class UserCache : public UserBackend, private boost::noncopyable {
+class UserCache : public UserDBBackend, private boost::noncopyable {
   private:
     friend class UserManager;
 
     Application *application;
 
-    boost::shared_ptr<UserBackend> backend;
+    boost::shared_ptr<UserDBBackend> backend;
 
     boost::recursive_mutex mutex;
 
@@ -106,9 +106,14 @@ class UserCache : public UserBackend, private boost::noncopyable {
       backend->deleteUserFromGroup(uid, gid);
     }
 
-    UserCache(Application *application0, boost::shared_ptr<UserBackend> backend0) : application(application0), backend(backend0),
+    UserCache(Application *application0, boost::shared_ptr<UserDBBackend> backend0) : application(application0), backend(backend0),
     userTime(boost::posix_time::not_a_date_time), groupTime(boost::posix_time::not_a_date_time),
     userGroupTime(boost::posix_time::not_a_date_time) {}
+
+  public:
+    virtual const std::string& getName() {
+      return backend->getName();
+    }
 };
 
 }
diff --git a/src/Common/UserConfigBackend.h b/src/Common/UserConfigBackend.h
new file mode 100644
index 0000000..0036e9c
--- /dev/null
+++ b/src/Common/UserConfigBackend.h
@@ -0,0 +1,54 @@
+/*
+ * UserConfigBackend.h
+ *
+ * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MAD_COMMON_USERCONFIGBACKEND_H_
+#define MAD_COMMON_USERCONFIGBACKEND_H_
+
+#include <config.h>
+
+#include <Core/Exception.h>
+
+#include "UserInfo.h"
+#include "GroupInfo.h"
+
+namespace Mad {
+namespace Common {
+
+class UserManager;
+
+class UserConfigBackend {
+  protected:
+    friend class UserManager;
+
+    virtual void addUser(const UserInfo &userInfo _UNUSED_PARAMETER_) throw(Core::Exception) {}
+    virtual void updateUser(const UserInfo &oldUserInfo _UNUSED_PARAMETER_, const UserInfo &userInfo _UNUSED_PARAMETER_) throw(Core::Exception) {}
+    virtual void deleteUser(const UserInfo &userInfo _UNUSED_PARAMETER_) throw(Core::Exception) {}
+
+    virtual void addGroup(const GroupInfo &groupInfo _UNUSED_PARAMETER_) throw(Core::Exception) {}
+    virtual void updateGroup(const GroupInfo &oldGroupInfo _UNUSED_PARAMETER_, const GroupInfo &groupInfo _UNUSED_PARAMETER_) throw(Core::Exception) {}
+    virtual void deleteGroup(const GroupInfo &groupInfo _UNUSED_PARAMETER_) throw(Core::Exception) {}
+
+    virtual void addUserToGroup(const UserInfo &userInfo _UNUSED_PARAMETER_, const GroupInfo &groupInfo _UNUSED_PARAMETER_) throw(Core::Exception) {}
+    virtual void deleteUserFromGroup(const UserInfo &userInfo _UNUSED_PARAMETER_, const GroupInfo &groupInfo _UNUSED_PARAMETER_) throw(Core::Exception) {}
+};
+
+}
+}
+
+#endif /* MAD_COMMON_USERCONFIGBACKEND_H_ */
diff --git a/src/Common/UserBackend.h b/src/Common/UserDBBackend.h
index 9eb59d3..5267ef3 100644
--- a/src/Common/UserBackend.h
+++ b/src/Common/UserDBBackend.h
@@ -1,5 +1,5 @@
 /*
- * UserBackend.h
+ * UserDBBackend.h
  *
  * Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
  *
@@ -17,8 +17,8 @@
  * with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef MAD_SERVER_USERBACKEND_H_
-#define MAD_SERVER_USERBACKEND_H_
+#ifndef MAD_SERVER_USERDBBACKEND_H_
+#define MAD_SERVER_USERDBBACKEND_H_
 
 #include <config.h>
 
@@ -41,12 +41,12 @@ namespace Common {
 class UserCache;
 class UserManager;
 
-class UserBackend {
+class UserDBBackend {
   protected:
     friend class UserCache;
     friend class UserManager;
 
-    UserBackend() {}
+    UserDBBackend() {}
 
     virtual boost::shared_ptr<const std::map<unsigned long, UserInfo> > getUserList(boost::posix_time::ptime *timestamp _UNUSED_PARAMETER_) throw(Core::Exception) {
       throw(Core::Exception(Core::Exception::NOT_IMPLEMENTED));
@@ -77,6 +77,7 @@ class UserBackend {
       throw(Core::Exception(Core::Exception::NOT_IMPLEMENTED));
     }
 
+
     virtual boost::shared_ptr<const std::set<unsigned long> > getGroupUserList(unsigned long gid _UNUSED_PARAMETER_, boost::posix_time::ptime *timestamp _UNUSED_PARAMETER_) throw(Core::Exception) {
       throw(Core::Exception(Core::Exception::NOT_IMPLEMENTED));
     }
@@ -85,10 +86,12 @@ class UserBackend {
       throw(Core::Exception(Core::Exception::NOT_IMPLEMENTED));
     }
 
+
     virtual void setPassword(unsigned long uid _UNUSED_PARAMETER_, const std::string &password _UNUSED_PARAMETER_) throw(Core::Exception) {
       throw(Core::Exception(Core::Exception::NOT_IMPLEMENTED));
     }
 
+
     virtual void addUser(const UserInfo &userInfo _UNUSED_PARAMETER_) throw(Core::Exception) {
       throw(Core::Exception(Core::Exception::NOT_IMPLEMENTED));
     }
@@ -101,6 +104,7 @@ class UserBackend {
       throw(Core::Exception(Core::Exception::NOT_IMPLEMENTED));
     }
 
+
     virtual void addGroup(const GroupInfo &groupInfo _UNUSED_PARAMETER_) throw(Core::Exception) {
       throw(Core::Exception(Core::Exception::NOT_IMPLEMENTED));
     }
@@ -122,14 +126,12 @@ class UserBackend {
     }
 
   public:
-    virtual ~UserBackend() {}
+    virtual ~UserDBBackend() {}
 
-    virtual int getPriority() const {
-      return 0;
-    }
+    virtual const std::string& getName() = 0;
 };
 
 }
 }
 
-#endif /* MAD_SERVER_USERBACKEND_H_ */
+#endif /* MAD_SERVER_USERDBBACKEND_H_ */
diff --git a/src/Common/UserManager.cpp b/src/Common/UserManager.cpp
index 928289b..d528137 100644
--- a/src/Common/UserManager.cpp
+++ b/src/Common/UserManager.cpp
@@ -20,344 +20,191 @@
 #include "UserManager.h"
 #include "UserCache.h"
 
-#include <iostream>
-
 namespace Mad {
 namespace Common {
 
-bool UserManager::Compare::operator() (boost::shared_ptr<UserBackend> b1, boost::shared_ptr<UserBackend> b2) {
-  if(b1->getPriority() == b2->getPriority())
-    return (b1.get() > b2.get());
-  else
-    return (b1->getPriority() > b2->getPriority());
+void UserManager::registerBackend(boost::shared_ptr<UserDBBackend> backend) {
+  boost::lock_guard<boost::shared_mutex> lock(mutex);
+
+  const std::string &name = backend->getName();
+
+  dbBackends.insert(std::make_pair(backend, std::make_pair(backend, name)));
+  dbBackendNames.insert(std::make_pair(name, backend));
+
+  if(!dbBackend)
+    dbBackend = backend;
 }
 
+void UserManager::registerBackendCached(boost::shared_ptr<UserDBBackend> backend) {
+  boost::lock_guard<boost::shared_mutex> lock(mutex);
+
+  const std::string &name = backend->getName();
+
+  boost::shared_ptr<UserCache> cache(new UserCache(application, backend));
 
-void UserManager::registerBackendCached(boost::shared_ptr<UserBackend> backend) {
-  {
-    boost::lock_guard<boost::shared_mutex> lock(mutex);
-    backends.insert(std::make_pair(backend, boost::shared_ptr<UserCache>(new UserCache(application, backend))));
-  }
+  dbBackends.insert(std::make_pair(backend, std::make_pair(cache, name)));
+  dbBackendNames.insert(std::make_pair(name, backend));
+
+  if(!dbBackend)
+    dbBackend = cache;
 }
 
 
 boost::shared_ptr<const std::map<unsigned long, UserInfo> > UserManager::getUserList(boost::posix_time::ptime *timestamp) throw(Core::Exception) {
-  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
 
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      return backend->second->getUserList(timestamp);
-    }
-    catch(Core::Exception e2) {
-      if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        e = e2;
-    }
-  }
-
-  throw e;
+  return dbBackend->getUserList(timestamp);
 }
 
 boost::shared_ptr<const UserInfo> UserManager::getUserInfo(unsigned long uid, boost::posix_time::ptime *timestamp) throw(Core::Exception) {
-  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
 
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      return backend->second->getUserInfo(uid, timestamp);
-    }
-    catch(Core::Exception e2) {
-      if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        e = e2;
-    }
-  }
-
-  throw e;
+  return dbBackend->getUserInfo(uid, timestamp);
 }
 
 boost::shared_ptr<const UserInfo> UserManager::getUserInfoByName(const std::string &name, boost::posix_time::ptime *timestamp) throw(Core::Exception) {
-  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
 
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      return backend->second->getUserInfoByName(name, timestamp);
-    }
-    catch(Core::Exception e2) {
-      if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        e = e2;
-    }
-  }
-
-  throw e;
+  return dbBackend->getUserInfoByName(name, timestamp);
 }
 
 boost::shared_ptr<const std::set<unsigned long> > UserManager::getUserGroupList(unsigned long uid, boost::posix_time::ptime *timestamp) throw(Core::Exception) {
-  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
 
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      return backend->second->getUserGroupList(uid, timestamp);
-    }
-    catch(Core::Exception e2) {
-      if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        e = e2;
-    }
-  }
-
-  throw e;
+  return dbBackend->getUserGroupList(uid, timestamp);
 }
 
 boost::shared_ptr<const std::map<unsigned long, GroupInfo> > UserManager::getGroupList(boost::posix_time::ptime *timestamp) throw(Core::Exception) {
-  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);
-
-  boost::shared_ptr<const std::map<unsigned long, GroupInfo> > ret;
-
-  {
-    boost::lock_guard<boost::shared_mutex> lock(mutex);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
 
-    for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-      try {
-        return backend->second->getGroupList(timestamp);
-      }
-      catch(Core::Exception e2) {
-        if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-          e = e2;
-      }
-    }
-  }
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
 
-  throw e;
+  return dbBackend->getGroupList(timestamp);
 }
 
 boost::shared_ptr<const GroupInfo> UserManager::getGroupInfo(unsigned long gid, boost::posix_time::ptime *timestamp) throw(Core::Exception) {
-  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
 
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      return backend->second->getGroupInfo(gid, timestamp);
-    }
-    catch(Core::Exception e2) {
-      if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        e = e2;
-    }
-  }
-
-  throw e;
+  return dbBackend->getGroupInfo(gid, timestamp);
 }
 
 boost::shared_ptr<const GroupInfo> UserManager::getGroupInfoByName(const std::string &name, boost::posix_time::ptime *timestamp) throw(Core::Exception) {
-  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
 
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      return backend->second->getGroupInfoByName(name, timestamp);
-    }
-    catch(Core::Exception e2) {
-      if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        e = e2;
-    }
-  }
-
-  throw e;
+  return dbBackend->getGroupInfoByName(name, timestamp);
 }
 
 boost::shared_ptr<const std::set<unsigned long> > UserManager::getGroupUserList(unsigned long gid, boost::posix_time::ptime *timestamp) throw(Core::Exception) {
-  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
 
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      return backend->second->getGroupUserList(gid, timestamp);
-    }
-    catch(Core::Exception e2) {
-      if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        e = e2;
-    }
-  }
-
-  throw e;
+  return dbBackend->getGroupUserList(gid, timestamp);
 }
 
 boost::shared_ptr<const std::multimap<unsigned long, unsigned long> > UserManager::getFullUserGroupList(boost::posix_time::ptime *timestamp) throw(Core::Exception) {
-  Core::Exception e(Core::Exception::NOT_IMPLEMENTED);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
 
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      return backend->second->getFullUserGroupList(timestamp);
-    }
-    catch(Core::Exception e2) {
-      if(e.getErrorCode() == Core::Exception::NOT_IMPLEMENTED && e2.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        e = e2;
-    }
-  }
-
-  throw e;
+  return dbBackend->getFullUserGroupList(timestamp);
 }
 
-void UserManager::setPassword(unsigned long uid, const std::string &password) throw(Core::Exception) {
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
-
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      backend->second->setPassword(uid, password);
-      return;
-    }
-    catch(Core::Exception e) {
-      if(e.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        throw e;
-    }
-  }
-
-  throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);
+void UserManager::setPassword(unsigned long uid _UNUSED_PARAMETER_, const std::string &password _UNUSED_PARAMETER_) throw(Core::Exception) {
+  throw Core::Exception(Core::Exception::NOT_AVAILABLE);
 }
 
 void UserManager::addUser(const UserInfo &userInfo) throw(Core::Exception) {
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      backend->second->addUser(userInfo);
-      return;
-    }
-    catch(Core::Exception e) {
-      if(e.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        throw e;
-    }
-  }
-
-  throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
+
+  dbBackend->addUser(userInfo);
 }
 
 void UserManager::updateUser(unsigned long uid, const UserInfo &userInfo) throw(Core::Exception) {
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      backend->second->updateUser(uid, userInfo);
-      return;
-    }
-    catch(Core::Exception e) {
-      if(e.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        throw e;
-    }
-  }
-
-  throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
+
+  dbBackend->updateUser(uid, userInfo);
 }
 
 void UserManager::deleteUser(unsigned long uid) throw(Core::Exception) {
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      backend->second->deleteUser(uid);
-      return;
-    }
-    catch(Core::Exception e) {
-      if(e.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        throw e;
-    }
-  }
-
-  throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
+
+  dbBackend->deleteUser(uid);
 }
 
 void UserManager::addGroup(const GroupInfo &groupInfo) throw(Core::Exception) {
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      backend->second->addGroup(groupInfo);
-      return;
-    }
-    catch(Core::Exception e) {
-      if(e.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        throw e;
-    }
-  }
-
-  throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
+
+  dbBackend->addGroup(groupInfo);
 }
 
 void UserManager::updateGroup(unsigned long gid, const GroupInfo &groupInfo) throw(Core::Exception) {
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
+
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      backend->second->updateGroup(gid, groupInfo);
-      return;
-    }
-    catch(Core::Exception e) {
-      if(e.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        throw e;
-    }
-  }
-
-  throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);
+  dbBackend->updateGroup(gid, groupInfo);
 }
 
 void UserManager::deleteGroup(unsigned long gid) throw(Core::Exception) {
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
+
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      backend->second->deleteGroup(gid);
-      return;
-    }
-    catch(Core::Exception e) {
-      if(e.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        throw e;
-    }
-  }
-
-  throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);
+  dbBackend->deleteGroup(gid);
 }
 
 void UserManager::addUserToGroup(unsigned long uid, unsigned long gid) throw(Core::Exception) {
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
+
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      backend->second->addUserToGroup(uid, gid);
-      return;
-    }
-    catch(Core::Exception e) {
-      if(e.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        throw e;
-    }
-  }
-
-  throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);
+  dbBackend->addUserToGroup(uid, gid);
 }
 
 void UserManager::deleteUserFromGroup(unsigned long uid, unsigned long gid) throw(Core::Exception) {
-  boost::lock_guard<boost::shared_mutex> lock(mutex);
+  boost::shared_lock<boost::shared_mutex> lock(mutex);
+
+  if(!dbBackend)
+    throw Core::Exception(Core::Exception::NOT_AVAILABLE);
 
-  for(BackendMap::iterator backend = backends.begin(); backend != backends.end(); ++backend) {
-    try {
-      backend->second->deleteUserFromGroup(uid, gid);
-      return;
-    }
-    catch(Core::Exception e) {
-      if(e.getErrorCode() != Core::Exception::NOT_IMPLEMENTED)
-        throw e;
-    }
-  }
-
-  throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);
+  dbBackend->deleteUserFromGroup(uid, gid);
 }
 
 }
diff --git a/src/Common/UserManager.h b/src/Common/UserManager.h
index d2529e7..5cf14db 100644
--- a/src/Common/UserManager.h
+++ b/src/Common/UserManager.h
@@ -35,38 +35,65 @@ namespace Mad {
 namespace Common {
 
 class Application;
-class UserBackend;
+class UserConfigBackend;
+class UserDBBackend;
 class UserCache;
 
 class UserManager : private boost::noncopyable {
   private:
     friend class Application;
 
-    struct Compare {
-      bool operator() (boost::shared_ptr<UserBackend> b1, boost::shared_ptr<UserBackend> b2);
-    };
-
-    typedef std::map<boost::shared_ptr<UserBackend>, boost::shared_ptr<UserBackend>, Compare> BackendMap;
+    typedef std::map<boost::shared_ptr<UserDBBackend>, std::pair<boost::shared_ptr<UserDBBackend>, std::string> > BackendMap;
 
     Application *application;
 
-    BackendMap backends;
+    std::set<boost::shared_ptr<UserConfigBackend> > configBackends;
+
+    BackendMap dbBackends;
+    std::map<std::string, boost::shared_ptr<UserDBBackend> > dbBackendNames;
+
+    boost::shared_ptr<UserDBBackend> dbBackend;
 
     boost::shared_mutex mutex;
 
     UserManager(Application *application0) : application(application0) {}
 
   public:
-    void registerBackend(boost::shared_ptr<UserBackend> backend) {
+    void registerBackend(boost::shared_ptr<UserDBBackend> backend);
+    void registerBackendCached(boost::shared_ptr<UserDBBackend> backend);
+
+    void unregisterBackend(boost::shared_ptr<UserDBBackend> backend) {
       boost::lock_guard<boost::shared_mutex> lock(mutex);
-      backends.insert(std::make_pair(backend, backend));
+
+      BackendMap::iterator it = dbBackends.find(backend);
+      if(it == dbBackends.end())
+        return;
+
+      boost::shared_ptr<UserDBBackend> oldBackend = it->second.first;
+
+      std::map<std::string, boost::shared_ptr<UserDBBackend> >::iterator it2 = dbBackendNames.find(it->second.second);
+      if(it2->second == backend)
+        dbBackendNames.erase(it2);
+
+      dbBackends.erase(it);
+
+      if(dbBackend == oldBackend) {
+        if(dbBackends.empty())
+          dbBackend.reset();
+        else
+          dbBackend = dbBackends.begin()->second.first;
+      }
     }
 
-    void registerBackendCached(boost::shared_ptr<UserBackend> backend);
 
-    void unregisterBackend(boost::shared_ptr<UserBackend> backend) {
+    void registerBackend(boost::shared_ptr<UserConfigBackend> backend) {
+      boost::lock_guard<boost::shared_mutex> lock(mutex);
+      configBackends.insert(backend);
+    }
+
+    void unregisterBackend(boost::shared_ptr<UserConfigBackend> backend) {
       boost::lock_guard<boost::shared_mutex> lock(mutex);
-      backends.erase(backend);
+      configBackends.erase(backend);
     }
 
     boost::shared_ptr<const std::map<unsigned long, UserInfo> > getUserList(boost::posix_time::ptime *timestamp = 0) throw(Core::Exception);