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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_REPORTING_METRICS_METRIC_RATE_CONTROLLER_H_
#define COMPONENTS_REPORTING_METRICS_METRIC_RATE_CONTROLLER_H_
#include <string>
#include "base/feature_list.h"
#include "base/functional/callback_forward.h"
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
namespace reporting {
class ReportingSettings;
BASE_DECLARE_FEATURE(kEnableTelemetryTestingRates);
// Control reporting rate based on the reporting setting specified by the
// setting path. Rate refers to the time between two consecutive periodic metric
// collections, i.e., the period of the repeated metric collections.
class MetricRateController {
public:
// `rate_unit_to_ms` multiplied by the rate in the settings results in the
// rate in milliseconds. It is used as a conversion helper for converting rate
// setting value to milliseconds if the setting value is not represented in
// milliseconds.
MetricRateController(base::RepeatingClosure task,
ReportingSettings* reporting_settings,
const std::string& rate_setting_path,
base::TimeDelta default_rate,
int rate_unit_to_ms = 1);
MetricRateController(const MetricRateController& other) = delete;
MetricRateController& operator=(const MetricRateController& other) = delete;
~MetricRateController();
void Start();
void Stop();
private:
void Run();
const base::RepeatingClosure task_;
const raw_ptr<ReportingSettings> reporting_settings_;
const std::string rate_setting_path_;
base::TimeDelta rate_;
const base::TimeDelta default_rate_;
const int rate_unit_to_ms_;
base::OneShotTimer timer_;
};
} // namespace reporting
#endif // COMPONENTS_REPORTING_METRICS_METRIC_RATE_CONTROLLER_H_
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