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/*
* Copyright 2015 Twitter, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//////////////////////////////////////////////////////////////////////////////
//
// time-spent-metric.h
//
// This metric keeps track of the total time (in msecs) spent in a state. The
// state transitions can be marked with the Start() and Stop() APIs. The total
// time is tracked for every window until the metric is purged at which
// time the total time is reset to 0.
//////////////////////////////////////////////////////////////////////////////
#ifndef __TIME_SPENT_METRIC_H_
#define __TIME_SPENT_METRIC_H_
#include <chrono>
#include "basics/basics.h"
#include "metrics/imetric.h"
#include "proto/messages.h"
namespace heron {
namespace common {
class TimeSpentMetric : public IMetric {
public:
TimeSpentMetric();
virtual ~TimeSpentMetric();
void Start();
void Stop();
virtual void GetAndReset(const sp_string& _prefix,
proto::system::MetricPublisherPublishMessage* _message);
private:
sp_int64 total_time_msecs_;
std::chrono::high_resolution_clock::time_point start_time_;
bool started_;
};
} // namespace common
} // namespace heron
#endif