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// Copyright (C) 2014-2015 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include <boost/random/mersenne_twister.hpp>
#include <boost/random/uniform_int_distribution.hpp>
#include <vsomeip/configuration.hpp>
#include <vsomeip/logger.hpp>
#include "../include/defines.hpp"
#include "../include/service_discovery.hpp"
#include "../include/service_discovery_fsm.hpp"
namespace vsomeip {
namespace sd {
///////////////////////////////////////////////////////////////////////////////
// Machine
///////////////////////////////////////////////////////////////////////////////
namespace _sd {
fsm::fsm(boost::asio::io_service &_io)
: fsm_base(_io), is_up_(true) {
}
fsm::~fsm() {
}
void fsm::set_fsm(std::shared_ptr<service_discovery_fsm> _fsm) {
fsm_ = _fsm;
}
void fsm::timer_expired(const boost::system::error_code &_error) {
if (!_error) {
std::shared_ptr<service_discovery_fsm> its_fsm = fsm_.lock();
if (its_fsm)
its_fsm->process(ev_timeout());
}
}
///////////////////////////////////////////////////////////////////////////////
// State "Inactive"
///////////////////////////////////////////////////////////////////////////////
inactive::inactive(my_context context)
: sc::state<inactive, fsm>(context) {
std::shared_ptr < service_discovery_fsm > fsm =
outermost_context().fsm_.lock();
if (fsm) {
VSOMEIP_TRACE << "sd<" << fsm->get_name() << ">::inactive";
outermost_context().run_ = 0;
}
}
sc::result inactive::react(const ev_none &_event) {
if (outermost_context().is_up_) {
return transit<active>();
}
return discard_event();
}
sc::result inactive::react(const ev_status_change &_event) {
outermost_context().is_up_ = _event.is_up_;
if (outermost_context().is_up_) {
return transit<active>();
}
return discard_event();
}
///////////////////////////////////////////////////////////////////////////////
// State "Active"
///////////////////////////////////////////////////////////////////////////////
active::active(my_context _context)
: sc::state<active, fsm, initial>(_context) {
std::shared_ptr < service_discovery_fsm > fsm =
outermost_context().fsm_.lock();
if (fsm) {
VSOMEIP_TRACE << "sd<" << fsm->get_name() << ">::active";
}
}
active::~active() {
}
sc::result active::react(const ev_status_change &_event) {
outermost_context().stop_timer();
outermost_context().is_up_ = _event.is_up_;
if (!outermost_context().is_up_)
return transit<inactive>();
return discard_event();
}
///////////////////////////////////////////////////////////////////////////////
// State "Active.Initial"
///////////////////////////////////////////////////////////////////////////////
initial::initial(my_context _context)
: sc::state<initial, active>(_context) {
std::shared_ptr < service_discovery_fsm > fsm =
outermost_context().fsm_.lock();
if (fsm) {
VSOMEIP_TRACE << "sd<" << fsm->get_name() << ">::active.initial";
outermost_context().start_timer(outermost_context().initial_delay_);
}
}
sc::result initial::react(const ev_timeout &_event) {
return transit<repeat>();
}
///////////////////////////////////////////////////////////////////////////////
// State "Active.Repeat"
///////////////////////////////////////////////////////////////////////////////
repeat::repeat(my_context _context)
: sc::state<repeat, active>(_context) {
std::shared_ptr < service_discovery_fsm > fsm =
outermost_context().fsm_.lock();
if (fsm) {
VSOMEIP_TRACE << "sd<" << fsm->get_name() << ">::active.repeat";
uint32_t its_timeout = (outermost_context().repetition_base_delay_
<< outermost_context().run_);
outermost_context().run_++;
fsm->send(false);
outermost_context().start_timer(its_timeout);
}
}
sc::result repeat::react(const ev_timeout &_event) {
if (outermost_context().run_ < outermost_context().repetition_max_)
return transit<repeat>();
return transit<announce>();
}
sc::result repeat::react(const ev_find_service &_event) {
return discard_event();
}
///////////////////////////////////////////////////////////////////////////////
// State "Active.Announce"
///////////////////////////////////////////////////////////////////////////////
announce::announce(my_context _context)
: sc::state<announce, active>(_context) {
std::shared_ptr < service_discovery_fsm > fsm =
outermost_context().fsm_.lock();
if (fsm) {
VSOMEIP_TRACE << "sd<" << fsm->get_name() << ">::active.announce";
outermost_context().start_timer(
outermost_context().cyclic_offer_delay_);
fsm->send(true);
}
}
sc::result announce::react(const ev_timeout &_event) {
return transit<announce>();
}
sc::result announce::react(const ev_find_service &_event) {
return discard_event();
}
sc::result announce::react(const ev_offer_change &_event) {
return transit<announce>();
}
} // namespace _sd
///////////////////////////////////////////////////////////////////////////////
// Interface
///////////////////////////////////////////////////////////////////////////////
service_discovery_fsm::service_discovery_fsm(const std::string &_name,
std::shared_ptr<service_discovery> _discovery)
: name_(_name), discovery_(_discovery), fsm_(
std::make_shared < _sd::fsm > (_discovery->get_io())) {
std::shared_ptr < service_discovery > discovery = discovery_.lock();
if (discovery) {
std::shared_ptr < configuration > its_configuration =
discovery->get_configuration();
int32_t its_min_initial_delay =
its_configuration->get_min_initial_delay(name_);
if (its_min_initial_delay < 0)
its_min_initial_delay = VSOMEIP_SD_DEFAULT_MIN_INITIAL_DELAY;
int32_t its_max_initial_delay =
its_configuration->get_max_initial_delay(name_);
if (its_max_initial_delay <= 0)
its_max_initial_delay = VSOMEIP_SD_DEFAULT_MAX_INITIAL_DELAY;
if (its_min_initial_delay > its_max_initial_delay) {
int32_t tmp_initial_delay = its_min_initial_delay;
its_min_initial_delay = its_max_initial_delay;
its_max_initial_delay = its_min_initial_delay;
}
VSOMEIP_TRACE << "Inital delay [" << its_min_initial_delay << ", "
<< its_max_initial_delay << "]";
boost::random::mt19937 its_generator;
boost::random::uniform_int_distribution<> its_distribution(
its_min_initial_delay, its_max_initial_delay);
fsm_->initial_delay_ = its_distribution(its_generator);
fsm_->repetition_base_delay_ =
its_configuration->get_repetition_base_delay(name_);
if (fsm_->repetition_base_delay_ <= 0)
fsm_->repetition_base_delay_
= VSOMEIP_SD_DEFAULT_REPETITION_BASE_DELAY;
fsm_->repetition_max_ = its_configuration->get_repetition_max(name_);
if (fsm_->repetition_max_ <= 0)
fsm_->repetition_max_ = VSOMEIP_SD_DEFAULT_REPETITION_MAX;
fsm_->cyclic_offer_delay_ =
its_configuration->get_cyclic_offer_delay(name_);
if (fsm_->cyclic_offer_delay_ <= 0)
fsm_->cyclic_offer_delay_ = VSOMEIP_SD_DEFAULT_CYCLIC_OFFER_DELAY;
VSOMEIP_INFO << "SD configuration [" << fsm_->initial_delay_ << ":"
<< fsm_->repetition_base_delay_ << ":"
<< (int) fsm_->repetition_max_ << ":"
<< fsm_->cyclic_offer_delay_ << "]";
} else {
VSOMEIP_ERROR << "SD initialization failed";
}
}
const std::string & service_discovery_fsm::get_name() const {
return name_;
}
void service_discovery_fsm::start() {
fsm_->set_fsm(shared_from_this());
fsm_->initiate();
}
void service_discovery_fsm::stop() {
}
void service_discovery_fsm::send(bool _is_announcing) {
std::shared_ptr < service_discovery > discovery = discovery_.lock();
if (discovery)
discovery->send(name_, _is_announcing);
}
} // namespace sd
} // namespace vsomeip
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