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/*
* Copyright (c) 2013-2014, Ford Motor Company
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of the Ford Motor Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "connection_handler/heartbeat_monitor.h"
#include <unistd.h>
#include <utility>
#include "utils/logger.h"
#include "connection_handler/connection.h"
namespace connection_handler {
using namespace sync_primitives;
CREATE_LOGGERPTR_GLOBAL(logger_, "HeartBeatMonitor")
HeartBeatMonitor::HeartBeatMonitor(uint32_t heartbeat_timeout_mseconds,
Connection* connection)
: default_heartbeat_timeout_(heartbeat_timeout_mseconds)
, connection_(connection)
, sessions_list_lock_(true)
, run_(true) {}
void HeartBeatMonitor::Process() {
sessions_list_lock_.Acquire();
SessionMap::iterator it = sessions_.begin();
while (it != sessions_.end()) {
SessionState& state = it->second;
if (state.HasTimeoutElapsed()) {
const uint8_t session_id = it->first;
if (state.IsReadyToClose()) {
LOG4CXX_WARN(logger_, "Will close session");
sessions_list_lock_.Release();
RemoveSession(session_id);
connection_->CloseSession(session_id);
sessions_list_lock_.Acquire();
it = sessions_.begin();
continue;
} else {
LOG4CXX_DEBUG(logger_,
"Send heart beat into session with id "
<< static_cast<int32_t>(session_id));
state.PrepareToClose();
connection_->SendHeartBeat(it->first);
}
}
++it;
}
sessions_list_lock_.Release();
}
void HeartBeatMonitor::threadMain() {
AutoLock main_lock(main_thread_lock_);
LOG4CXX_DEBUG(logger_,
"Start heart beat monitor. Timeout is "
<< default_heartbeat_timeout_);
while (run_) {
heartbeat_monitor_.WaitFor(main_lock, kDefaultCycleTimeout);
Process();
}
}
void HeartBeatMonitor::AddSession(uint8_t session_id) {
LOG4CXX_DEBUG(logger_,
"Add session with id " << static_cast<int32_t>(session_id));
AutoLock auto_lock(sessions_list_lock_);
if (sessions_.end() != sessions_.find(session_id)) {
LOG4CXX_WARN(logger_,
"Session with id " << static_cast<int32_t>(session_id)
<< " already exists");
return;
}
sessions_.insert(
std::make_pair(session_id, SessionState(default_heartbeat_timeout_)));
LOG4CXX_INFO(logger_, "Start heartbeat for session " << session_id);
}
void HeartBeatMonitor::RemoveSession(uint8_t session_id) {
LOG4CXX_AUTO_TRACE(logger_);
AutoLock auto_lock(sessions_list_lock_);
LOG4CXX_DEBUG(logger_,
"Remove session with id " << static_cast<int>(session_id));
if (sessions_.erase(session_id) == 0) {
LOG4CXX_WARN(logger_,
"Remove session with id " << static_cast<int>(session_id)
<< " was unsuccessful");
}
}
void HeartBeatMonitor::KeepAlive(uint8_t session_id) {
LOG4CXX_AUTO_TRACE(logger_);
AutoLock auto_lock(sessions_list_lock_);
if (sessions_.end() != sessions_.find(session_id)) {
LOG4CXX_INFO(logger_,
"Resetting heart beat timer for session with id "
<< static_cast<int32_t>(session_id));
sessions_[session_id].KeepAlive();
}
}
void HeartBeatMonitor::exitThreadMain() {
// FIXME (dchmerev@luxoft.com): thread requested to stop should stop as soon
// as possible,
// not running one more iteration before actual stop
LOG4CXX_AUTO_TRACE(logger_);
AutoLock main_lock(main_thread_lock_);
run_ = false;
heartbeat_monitor_.NotifyOne();
}
void HeartBeatMonitor::set_heartbeat_timeout_milliseconds(uint32_t timeout,
uint8_t session_id) {
LOG4CXX_DEBUG(logger_,
"Set new heart beat timeout " << timeout
<< "For session: " << session_id);
AutoLock session_locker(sessions_list_lock_);
if (sessions_.end() != sessions_.find(session_id)) {
sessions_[session_id].UpdateTimeout(timeout);
}
}
HeartBeatMonitor::SessionState::SessionState(
uint32_t heartbeat_timeout_mseconds)
: heartbeat_timeout_mseconds_(heartbeat_timeout_mseconds)
, is_heartbeat_sent_(false) {
LOG4CXX_AUTO_TRACE(logger_);
RefreshExpiration();
}
void HeartBeatMonitor::SessionState::RefreshExpiration() {
LOG4CXX_DEBUG(logger_, "Refresh expiration: " << heartbeat_timeout_mseconds_);
using namespace date_time;
TimevalStruct time = DateTime::getCurrentTime();
DateTime::AddMilliseconds(time, heartbeat_timeout_mseconds_);
heartbeat_expiration_ = time;
}
void HeartBeatMonitor::SessionState::UpdateTimeout(
uint32_t heartbeat_timeout_mseconds) {
LOG4CXX_DEBUG(logger_,
"Update timout with value " << heartbeat_timeout_mseconds_);
heartbeat_timeout_mseconds_ = heartbeat_timeout_mseconds;
RefreshExpiration();
}
void HeartBeatMonitor::SessionState::PrepareToClose() {
is_heartbeat_sent_ = true;
LOG4CXX_DEBUG(logger_, "Prepare to close");
RefreshExpiration();
}
bool HeartBeatMonitor::SessionState::IsReadyToClose() const {
return is_heartbeat_sent_;
}
void HeartBeatMonitor::SessionState::KeepAlive() {
LOG4CXX_AUTO_TRACE(logger_);
is_heartbeat_sent_ = false;
RefreshExpiration();
}
bool HeartBeatMonitor::SessionState::HasTimeoutElapsed() {
TimevalStruct now = date_time::DateTime::getCurrentTime();
return date_time::DateTime::Greater(now, heartbeat_expiration_);
}
} // namespace connection_handler
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