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/************************************************************************
*
* Copyright (C) 2024-2025 IRCAD France
*
* This file is part of Sight.
*
* Sight 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.
*
* Sight 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 Sight. If not, see <https://www.gnu.org/licenses/>.
*
***********************************************************************/
#include "update_sequence.hpp"
#include "detail/update_registry.hpp"
#include <future>
namespace sight::app
{
//------------------------------------------------------------------------------
void update_sequence::starting()
{
if(!m_parent.empty())
{
app::register_updater(m_parent, this->get_sptr());
}
if(m_loop)
{
this->updating();
}
}
//-----------------------------------------------------------------------------
void update_sequence::stopping()
{
if(!m_parent.empty())
{
app::unregister_updater(m_parent);
}
}
//-----------------------------------------------------------------------------
void update_sequence::updating()
{
std::vector<std::pair<sight::service::base::sptr, std::string> > services;
std::set<std::string> is_going_to_be_started;
std::set<std::string> is_going_to_be_stopped;
for(const auto& element : m_elements)
{
sight::service::base::sptr srv;
if(element.type == type_t::SERVICE)
{
srv = std::dynamic_pointer_cast<sight::service::base>(sight::core::id::get_object(element.uid));
}
else
{
srv = app::get_updater(element.uid);
}
if(srv != nullptr)
{
const auto is_slot_start = (element.slot == service::base::slots::START);
const auto is_slot_stop = (element.slot == service::base::slots::STOP);
if(is_slot_start)
{
// memorize that a start of this service is called.
is_going_to_be_started.insert(element.uid);
}
else if(is_slot_stop)
{
//memorize that a stop of this service is called.
is_going_to_be_stopped.insert(element.uid);
}
const auto is_started = srv->started();
const auto will_be_started = is_going_to_be_started.contains(element.uid);
const auto is_stopped = srv->stopped();
const auto will_be_stopped = is_going_to_be_stopped.contains(element.uid);
// Service is started, or will be started and current slot is not start = OK we add the slot.
if((is_started or will_be_started) and not is_slot_start)
{
services.emplace_back(srv, element.slot);
if(srv->is_auto_connected())
{
SIGHT_ERROR(
"[sight::app::update_sequence] Service " << std::quoted(element.uid)
<< " is auto-connected, this is likely to introduce timing issues."
);
}
}
// Service is stopped or will be stopped and current slot isn't start or stop = NOK we discard the sequence
else if((is_stopped or will_be_stopped) and not is_slot_start and not is_slot_stop)
{
if(not element.ignore_stopped)
{
SIGHT_WARN(
"[sight::app::update_sequence] Service " << std::quoted(element.uid)
<< " is stopped or will be stopped."
);
services.clear();
break;
}
}
// Service isn't stopped and slot isn't stop = OK we add slot
else if(not (is_stopped or will_be_stopped) or not is_slot_stop)
{
services.emplace_back(srv, element.slot);
if(srv->is_auto_connected())
{
SIGHT_ERROR(
"[sight::app::update_sequence] Service " << std::quoted(element.uid)
<< " is auto-connected, this is likely to introduce timing issues."
);
}
}
}
}
std::ranges::for_each(
services,
[this](const auto& _srv)
{
if(this->worker() == _srv.first->worker())
{
_srv.first->slot(_srv.second)->run();
}
else
{
_srv.first->slot(_srv.second)->async_run().wait();
}
});
if(m_loop)
{
this->slot(service::base::slots::UPDATE)->async_run();
}
}
//-----------------------------------------------------------------------------
} // namespace sight::app
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