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/*
* Copyright (c) 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.
*/
#ifndef SRC_COMPONENTS_INCLUDE_UTILS_MESSAGEMETER_H_
#define SRC_COMPONENTS_INCLUDE_UTILS_MESSAGEMETER_H_
#include <cstddef>
#include <set>
#include <map>
#include "utils/date_time.h"
namespace utils {
/**
@brief The MessageMeter class need to count message frequency
Default time range value is 1 second
IncomingDataHandler methods are reentrant and not thread-safe
@tparam Id could be used for handling messages by session,
connection or other identifier
*/
template <class Id>
class MessageMeter {
public:
MessageMeter();
/**
@brief Update frequency value for selected identifier
@param Id - unique identifier
@return frequency
*/
size_t TrackMessage(const Id& id);
/**
@brief Update frequency value for selected identifier
@param Id - unique identifier
@param count - count of received messages
@return frequency
*/
size_t TrackMessages(const Id& id, const size_t count);
/**
@brief Frequency of messages for selected identifier
@param Id - unique identifier
@return frequency
*/
size_t Frequency(const Id& id);
/**
@brief Remove all data refer to selected identifier
@param Id - unique identifier
*/
void RemoveIdentifier(const Id& id);
/**
@brief Remove all frequency data
*/
void ClearIdentifiers();
void set_time_range(const size_t time_range_msecs);
void set_time_range(const TimevalStruct& time_range);
TimevalStruct time_range() const;
private:
TimevalStruct time_range_;
typedef std::multiset<TimevalStruct> Timings;
typedef std::map<Id, Timings> TimingMap;
TimingMap timing_map_;
};
template <class Id>
MessageMeter<Id>::MessageMeter()
: time_range_(TimevalStruct {0, 0}) {
time_range_.tv_sec = 1;
}
template <class Id>
size_t MessageMeter<Id>::TrackMessage(const Id& id) {
return TrackMessages(id, 1);
}
template <class Id>
size_t MessageMeter<Id>::TrackMessages(const Id& id,
const size_t count) {
Timings& timings = timing_map_[id];
const TimevalStruct current_time = date_time::DateTime::getCurrentTime();
for (size_t i = 0; i < count; ++i) {
// Adding to the end is amortized constant
timings.insert(timings.end(), current_time);
}
return Frequency(id);
}
template <class Id>
size_t MessageMeter<Id>::Frequency(const Id& id) {
typename TimingMap::iterator it = timing_map_.find(id);
if(it == timing_map_.end()) {
return 0u;
}
Timings& timings = it->second;
if (timings.empty()) {
return 0u;
}
const TimevalStruct actual_begin_time =
date_time::DateTime::Sub(date_time::DateTime::getCurrentTime(),
time_range_);
timings.erase(timings.begin(),
timings.upper_bound(actual_begin_time));
return timings.size();
}
template <class Id>
void MessageMeter<Id>::RemoveIdentifier(const Id& id) {
timing_map_.erase(id);
}
template <class Id>
void MessageMeter<Id>::ClearIdentifiers() {
timing_map_.clear();
}
template <class Id>
void MessageMeter<Id>::set_time_range(const size_t time_range_msecs) {
// TODO(EZamakhov): move to date_time::DateTime
const size_t secs =
time_range_msecs / date_time::DateTime::MILLISECONDS_IN_SECOND;
time_range_.tv_sec = secs;
const size_t mSecs =
time_range_msecs % date_time::DateTime::MILLISECONDS_IN_SECOND;
time_range_.tv_usec =
mSecs * date_time::DateTime::MICROSECONDS_IN_MILLISECONDS;
}
template <class Id>
void MessageMeter<Id>::set_time_range(const TimevalStruct& time_range) {
time_range_ = time_range;
}
template <class Id>
TimevalStruct MessageMeter<Id>::time_range() const {
return time_range_;
}
} // namespace utils
#endif // SRC_COMPONENTS_INCLUDE_UTILS_MESSAGEMETER_H_
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