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/*
* Copyright (c) 2013, 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.
*/
#ifndef SRC_COMPONENTS_CONNECTION_HANDLER_INCLUDE_CONNECTION_HANDLER_HEARTBEAT_MONITOR_H_
#define SRC_COMPONENTS_CONNECTION_HANDLER_INCLUDE_CONNECTION_HANDLER_HEARTBEAT_MONITOR_H_
#include <stdint.h>
#include <map>
#include "utils/threads/thread.h"
#include "utils/threads/thread_delegate.h"
#include "utils/date_time.h"
#include "utils/macro.h"
#include "utils/lock.h"
namespace connection_handler {
class Connection;
/*
* Starts hearbeat timer for session and when it elapses closes it
*/
class HeartBeatMonitor : public threads::ThreadDelegate {
public:
HeartBeatMonitor(uint32_t heartbeat_timeout_mseconds, Connection* connection);
/**
* Thread procedure.
*/
virtual void threadMain();
/**
* \brief add and remove session
*/
void AddSession(uint8_t session_id);
void RemoveSession(uint8_t session_id);
/**
* \brief Resets timer preventing session from being killed
*/
void KeepAlive(uint8_t session_id);
/**
* @brief Check is heartbeat monitoring started for specified session
* @param session_id session id
* @return returns true if heartbeat monitoring started for specified session
* otherwise returns false
*/
bool IsSessionHeartbeatTracked(const uint8_t session_id) const;
/**
* \brief Thread exit procedure.
*/
virtual void exitThreadMain();
/**
* @brief Update heart beat timeout for session
* @param timeout contains timeout for updating
* @param session_id contain id session for which update timeout
* timeout
**/
void set_heartbeat_timeout_milliseconds(uint32_t timeout, uint8_t session_id);
private:
// \brief Heartbeat timeout
uint32_t default_heartbeat_timeout_;
// \brief Connection that must be closed when timeout elapsed
Connection* connection_;
// Default HeartBeat cycle timeout (in miliseconds)
static const int32_t kDefaultCycleTimeout = 100;
class SessionState {
public:
explicit SessionState(uint32_t heartbeat_timeout_mseconds = 0);
void UpdateTimeout(uint32_t heartbeat_timeout_mseconds);
void PrepareToClose();
bool IsReadyToClose() const;
void KeepAlive();
bool HasTimeoutElapsed();
private:
void RefreshExpiration();
uint32_t heartbeat_timeout_mseconds_;
TimevalStruct heartbeat_expiration_;
bool is_heartbeat_sent_;
};
// \brief monitored sessions collection
typedef std::map<uint8_t, SessionState> SessionMap;
SessionMap sessions_;
mutable sync_primitives::Lock sessions_list_lock_; // recurcive
sync_primitives::Lock main_thread_lock_;
mutable sync_primitives::Lock heartbeat_timeout_seconds_lock_;
sync_primitives::ConditionalVariable heartbeat_monitor_;
volatile bool run_;
void Process();
DISALLOW_COPY_AND_ASSIGN(HeartBeatMonitor);
};
} // namespace connection_handler
#endif // SRC_COMPONENTS_CONNECTION_HANDLER_INCLUDE_CONNECTION_HANDLER_HEARTBEAT_MONITOR_H_
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