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// Copyright (C) 2014 BMW Group
// Author: Lutz Bichler (lutz.bichler@bmw.de)
// 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/service_discovery.hpp"
#include "../include/service_discovery_fsm.hpp"
namespace vsomeip {
namespace sd {
///////////////////////////////////////////////////////////////////////////////
// Machine
///////////////////////////////////////////////////////////////////////////////
namespace _sd {
fsm::fsm(service_discovery_fsm *_fsm):
fsm_(_fsm),
fsm_base(_fsm->get_io()),
is_up_(true) {
}
fsm::~fsm() {
}
void fsm::timer_expired(const boost::system::error_code &_error) {
if (!_error) {
process_event(ev_timeout());
}
}
///////////////////////////////////////////////////////////////////////////////
// State "Inactive"
///////////////////////////////////////////////////////////////////////////////
inactive::inactive(my_context context): sc::state< inactive, fsm >(context) {
VSOMEIP_TRACE << "sd<" << outermost_context().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) {
VSOMEIP_TRACE << "sd<" << outermost_context().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) {
VSOMEIP_TRACE << "sd<" << outermost_context().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) {
VSOMEIP_TRACE << "sd<" << outermost_context().fsm_->get_name() << ">::active.repeat";
uint32_t its_timeout = (outermost_context().repetition_base_delay_ << outermost_context().run_);
outermost_context().run_ ++;
outermost_context().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) {
VSOMEIP_TRACE << "sd<" << outermost_context().fsm_->get_name() << ">::active.announce";
outermost_context().start_timer(outermost_context().cyclic_offer_delay_);
outermost_context().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, service_discovery *_discovery)
: name_(_name), discovery_(_discovery), fsm_(std::make_shared< _sd::fsm >(this)) {
std::shared_ptr< configuration > its_configuration
= discovery_->get_configuration();
int32_t its_min_initial_delay = its_configuration->get_min_initial_delay(name_);
int32_t its_max_initial_delay = its_configuration->get_max_initial_delay(name_);
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_);
fsm_->repetition_max_
= its_configuration->get_repetition_max(name_);
fsm_->cyclic_offer_delay_
= its_configuration->get_cyclic_offer_delay(name_);
VSOMEIP_INFO << "SD configuration ["
<< fsm_->initial_delay_ << ":"
<< fsm_->repetition_base_delay_ << ":"
<< (int)fsm_->repetition_max_ << ":"
<< fsm_->cyclic_offer_delay_ << "]";
}
const std::string & service_discovery_fsm::get_name() const {
return name_;
}
boost::asio::io_service & service_discovery_fsm::get_io() {
return discovery_->get_io();
}
void service_discovery_fsm::start() {
fsm_->initiate();
}
void service_discovery_fsm::stop() {
}
void service_discovery_fsm::send(bool _is_announcing) {
discovery_->send(name_, _is_announcing);
}
} // namespace sd
} // namespace vsomeip
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