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