modules/dbus/src/connection.cpp

   1 /*
   2  * Copyright (c) 2011 Samsung Electronics Co., Ltd All Rights Reserved
   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 /**
  17  * @file    connection.cpp
  18  * @author  Zbigniew Kostrzewa (z.kostrzewa@samsung.com)
  19  * @version 1.0
  20  * @brief
  21  */
  22
  23 #include <dpl/log/log.h>
  24 #include <dpl/dbus/connection.h>
  25 #include <dpl/dbus/exception.h>
  26 #include <dpl/dbus/object_proxy.h>
  27
  28 namespace DPL
  29 {
  30 namespace DBus
  31 {
  32
  33 ConnectionPtr Connection::sessionBus()
  34 {
  35     return connectTo(G_BUS_TYPE_SESSION);
  36 }
  37
  38 ConnectionPtr Connection::systemBus()
  39 {
  40     return connectTo(G_BUS_TYPE_SYSTEM);
  41 }
  42
  43 ConnectionPtr Connection::connectTo(GBusType busType)
  44 {
  45     GError* error = NULL;
  46
  47     GDBusConnection* connection = g_bus_get_sync(busType,
  48                                                  NULL,
  49                                                  &error);
  50     if (NULL == connection)
  51     {
  52         std::string message;
  53         if (NULL != error)
  54         {
  55             message = error->message;
  56             g_error_free(error);
  57         }
  58         ThrowMsg(DBus::Exception,
  59                  "Couldn't connect to bus: " << message);
  60     }
  61
  62     g_dbus_connection_set_exit_on_close(connection, FALSE);
  63
  64     return ConnectionPtr(new Connection(connection));
  65 }
  66
  67 ConnectionPtr Connection::connectTo(const std::string& address)
  68 {
  69     GError* error = NULL;
  70
  71     GDBusConnection* connection = g_dbus_connection_new_for_address_sync(
  72                                           address.c_str(),
  73                                           G_DBUS_CONNECTION_FLAGS_NONE,
  74                                           NULL,
  75                                           NULL,
  76                                           &error);
  77     if (NULL == connection)
  78     {
  79         std::string message;
  80         if (NULL != error)
  81         {
  82             message = error->message;
  83             g_error_free(error);
  84         }
  85         ThrowMsg(DBus::Exception,
  86                  "Couldn't connect to " << address << ": " << message);
  87     }
  88
  89     return ConnectionPtr(new Connection(connection));
  90 }
  91
  92 Connection::Connection(GDBusConnection* connection)
  93     : m_connection(connection)
  94 {
  95     g_signal_connect(m_connection,
  96                      "closed",
  97                      G_CALLBACK(onConnectionClosed),
  98                      this);
  99 }
 100
 101 Connection::~Connection()
 102 {
 103     std::for_each(m_registeredServices.begin(),
 104                   m_registeredServices.end(),
 105                   [] (const RegisteredServices::value_type& value)
 106                   {
 107                       g_bus_unown_name(value.second);
 108                   });
 109
 110     std::for_each(m_registeredObjects.begin(),
 111                   m_registeredObjects.end(),
 112                   [m_connection] (const RegisteredObjects::value_type& value)
 113                   {
 114                       g_dbus_connection_unregister_object(
 115                               m_connection,
 116                               value.second.registrationId);
 117                   });
 118
 119     if (!g_dbus_connection_is_closed(m_connection))
 120     {
 121         GError* error = NULL;
 122
 123         if (FALSE == g_dbus_connection_flush_sync(m_connection, NULL, &error))
 124         {
 125             LogPedantic("Could not flush the connection"
 126                      << " <" << error->message << ">");
 127             g_error_free(error);
 128         }
 129     }
 130
 131     g_object_unref(m_connection);
 132 }
 133
 134 void Connection::registerService(const std::string& serviceName)
 135 {
 136     guint regId = g_bus_own_name_on_connection(m_connection,
 137                                                serviceName.c_str(),
 138                                                G_BUS_NAME_OWNER_FLAGS_NONE,
 139                                                onServiceNameAcquired,
 140                                                onServiceNameLost,
 141                                                this,
 142                                                NULL);
 143     if (0 >= regId)
 144     {
 145         ThrowMsg(DBus::Exception, "Error while registering service.");
 146     }
 147
 148     m_registeredServices.insert(RegisteredServices::value_type(serviceName,
 149                                                                regId));
 150 }
 151
 152 void Connection::unregisterService(const std::string& serviceName)
 153 {
 154     auto it = m_registeredServices.find(serviceName);
 155     if (m_registeredServices.end() == it)
 156     {
 157         ThrowMsg(DBus::Exception, "Service not registered.");
 158     }
 159
 160     g_bus_unown_name(it->second);
 161
 162     m_registeredServices.erase(it);
 163 }
 164
 165 void Connection::registerObject(const ObjectPtr& object)
 166 {
 167     GError* error = NULL;
 168
 169     guint regId = g_dbus_connection_register_object(
 170                           m_connection,
 171                           object->getPath().c_str(),
 172                           object->getInterface()->getInfo(),
 173                           object->getInterface()->getVTable(),
 174                           // TODO This is ugly, fix this!
 175                           object->getInterface().get(),
 176                           NULL,
 177                           &error);
 178     if (0 == regId)
 179     {
 180         std::string message;
 181         if (NULL != error)
 182         {
 183             message = error->message;
 184             LogPedantic(error->message << " " << error->code);
 185             g_error_free(error);
 186         }
 187         ThrowMsg(DBus::Exception, "Error while registering an object: "
 188                                   << message);
 189     }
 190
 191     m_registeredObjects.insert(RegisteredObjects::value_type(
 192                                        object->getPath(),
 193                                        ObjectRegistration(regId, object)));
 194 }
 195
 196 void Connection::unregisterObject(const std::string& objectPath)
 197 {
 198     auto it = m_registeredObjects.find(objectPath);
 199     if (m_registeredObjects.end() == it)
 200     {
 201         ThrowMsg(DBus::Exception, "Object not registered.");
 202     }
 203
 204     gboolean result = g_dbus_connection_unregister_object(
 205                               m_connection,
 206                               it->second.registrationId);
 207     if (FALSE == result)
 208     {
 209         ThrowMsg(DBus::Exception, "Unregistering object failed.");
 210     }
 211     m_registeredObjects.erase(it);
 212 }
 213
 214 ObjectProxyPtr Connection::createObjectProxy(const std::string& serviceName,
 215                                              const std::string& objectPath)
 216 {
 217     if (g_dbus_connection_is_closed(m_connection))
 218     {
 219         ThrowMsg(DBus::ConnectionClosedException, "Connection closed.");
 220     }
 221
 222     return ObjectProxyPtr(
 223             new ObjectProxy(m_connection, serviceName, objectPath));
 224 }
 225
 226 void Connection::onServiceNameAcquired(GDBusConnection* /*connection*/,
 227                                        const gchar* serviceName,
 228                                        gpointer data)
 229 {
 230     Assert(data && "Connection should not be NULL");
 231
 232     Connection* self = static_cast<Connection*>(data);
 233
 234     LogPedantic("Emitting service name acquired event: " << serviceName);
 235
 236     ConnectionEvents::ServiceNameAcquiredEvent event(serviceName);
 237     self->DPL::Event::EventSupport<ConnectionEvents::ServiceNameAcquiredEvent>::
 238             EmitEvent(event, DPL::Event::EmitMode::Queued);
 239 }
 240
 241 void Connection::onServiceNameLost(GDBusConnection* /*connection*/,
 242                                    const gchar* serviceName,
 243                                    gpointer data)
 244 {
 245     Assert(data && "Connection should not be NULL");
 246
 247     Connection* self = static_cast<Connection*>(data);
 248
 249     LogPedantic("Emitting service name lost event: " << serviceName);
 250
 251     ConnectionEvents::ServiceNameLostEvent event(serviceName);
 252     self->DPL::Event::EventSupport<ConnectionEvents::ServiceNameLostEvent>::
 253             EmitEvent(event, DPL::Event::EmitMode::Queued);
 254 }
 255
 256 void Connection::onConnectionClosed(GDBusConnection* /*connection*/,
 257                                     gboolean peerVanished,
 258                                     GError* error,
 259                                     gpointer data)
 260 {
 261     Assert(NULL != data && "Connection cannot be NULL");
 262
 263     Connection* self = static_cast<Connection*>(data);
 264
 265     if ((NULL == error) && (FALSE == peerVanished))
 266     {
 267         // Connection closed by this.
 268     }
 269     else if (NULL != error)
 270     {
 271         std::string message = error->message;
 272
 273         g_error_free(error);
 274
 275         if (TRUE == peerVanished)
 276         {
 277             // Connection closed by remote host.
 278             ConnectionEvents::ConnectionBrokenEvent event(message);
 279             self->DPL::Event::EventSupport<ConnectionEvents::ConnectionBrokenEvent>::
 280                     EmitEvent(event, DPL::Event::EmitMode::Queued);
 281         }
 282         else
 283         {
 284             // Invalid or malformed data on connection.
 285             ConnectionEvents::ConnectionInvalidEvent event(message);
 286             self->DPL::Event::EventSupport<ConnectionEvents::ConnectionInvalidEvent>::
 287                     EmitEvent(event, DPL::Event::EmitMode::Queued);
 288         }
 289     }
 290 }
 291
 292 }
 293 }