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/* Copyright (C) 2011 The giomm Development Team
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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 library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* This is a basic server providing a clock like functionality. Clients can
* get the current time, set the alarm and get notified when the alarm time is
* reached. It is basic because there is only one global alarm which any
* client can set. Clients listening for the alarm signal will be notified by
* use of the global alarm signal. The server should be easily modifiable to
* allow per-client alarms, but that is left as an exercise.
*
* Along with the above it provides a method to get its stdout's file
* descriptor to test the Gio::DBusMessage API.
*/
#include <giomm.h>
#include <glibmm.h>
#include <iostream>
namespace
{
static Glib::RefPtr<Gio::DBusNodeInfo> introspection_data;
static Glib::ustring introspection_xml =
"<node>"
" <interface name='org.glibmm.DBus.Clock'>"
" <method name='GetTime'>"
" <method name='SetAlarm'>"
" <arg type='s' name='iso8601' direction='in'/>"
" </method>"
" <method name='GetStdout'>"
" <signal name='OnAlarm'>"
" <arg type='s' name='iso8601'/>"
" </signal>"
// The time of the alarm as an iso8601 string.
" <property type='s' name='Alarm' access='readwrite'/>"
" </interface>"
"</node>";
// Stores the current alarm.
static Glib::TimeVal curr_alarm;
} // anonymous namespace
static void on_method_call(const Glib::RefPtr<Gio::DBusConnection>& connection,
const Glib::ustring& /* sender */, const Glib::ustring& /* object_path */,
const Glib::ustring& /* interface_name */, const Glib::ustring& method_name,
const Glib::VariantBase& /* parameters */,
const Glib::RefPtr<Gio::DBusMethodInvocation>& invocation)
{
if(method_name == "GetTime")
{
Glib::TimeVal curr_time;
curr_time.assign_current_time();
Glib::ustring time_str = curr_time.as_iso8601();
Glib::Variant<Glib::ustring> time_var =
Glib::Variant<Glib::ustring>::create(time_str);
// Create a variant array to create a tuple to be returned to the client.
std::vector<Glib::VariantBase> var_array;
var_array.push_back(time_var);
// Create the tuple.
Glib::VariantContainerBase response =
Glib::VariantContainerBase::create_tuple(var_array);
// Return the tuple with the included time.
invocation->return_value(response);
}
else if(method_name == "SetAlarm")
{
// Get the parameter tuple.
Glib::VariantContainerBase parameters;
invocation->get_parameters(parameters);
// Get the variant string.
Glib::Variant<Glib::ustring> param;
parameters.get(param);
// Get the time string.
Glib::ustring time_str = param.get();
if(!curr_alarm.assign_from_iso8601(time_str))
{
// If setting alarm was not successful, return an error.
Gio::DBusError error(Gio::DBusError::INVALID_ARGS,
"Alarm string is not in ISO8601 format.");
invocation->return_gerror(error);
}
}
else if(method_name == "GetStdout")
{
#ifndef G_OS_WIN32
if(connection->get_capabilities() &
Gio::DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING)
{
Glib::RefPtr<Gio::UnixFDList> list = Gio::UnixFDList::create();
try
{
list->append(STDOUT_FILENO);
Glib::RefPtr<Gio::DBusMessage> reply =
Gio::DBusMessage::create_method_reply(invocation->get_message());
reply->set_unix_fd_list(list);
connection->send_message(reply);
}
catch(const Glib::Error& ex)
{
std::cerr << "Error trying to send stdout to client: " << ex.what() <<
std::endl;
return;
}
}
else
{
invocation->return_dbus_error("org.glibmm.DBus.Failed", "Your message "
"bus daemon does not support file descriptor passing (need D-Bus >= "
"1.3.0)");
}
#else
invocation->return_dbus_error("org.glibmm.DBus.Failed", "Your message bus "
"daemon does not support file descriptor passing (need D-Bus >= 1.3.0)");
#endif
}
else
{
// Non-existent method on the interface.
Gio::DBusError error(Gio::DBusError::UNKNOWN_METHOD,
"Method does not exist.");
invocation->return_gerror(error);
}
}
void on_get_property(Glib::VariantBase& property,
const Glib::RefPtr<Gio::DBusConnection>& /* connection */,
const Glib::ustring& /* sender */, const Glib::ustring& /* object_path */,
const Glib::ustring& /* interface_name */, const Glib::ustring& property_name)
{
if(property_name == "Alarm")
{
if(curr_alarm.valid())
{
Glib::ustring alarm_str = curr_alarm.as_iso8601();
Glib::Variant<Glib::ustring> alarm_var =
Glib::Variant<Glib::ustring>::create(alarm_str);
property = alarm_var;
}
else
{
throw Gio::Error(Gio::Error::FAILED, "Alarm has not been set.");
}
}
else
{
throw Gio::DBusError(Gio::DBusError::FAILED, "Unknown property name.");
}
}
bool on_set_property(const Glib::RefPtr<Gio::DBusConnection>& connection,
const Glib::ustring& sender, const Glib::ustring& object_path,
const Glib::ustring& interface_name, const Glib::ustring& property_name,
const Glib::VariantBase& value)
{
if(property_name == "Alarm")
{
}
else
{
}
}
int main(int, char**)
{
std::locale::global(std::locale(""));
Gio::init();
return 0;
}
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