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// Copyright 2020 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_EMBEDDER_SUPPORT_ANDROID_METRICS_MEMORY_METRICS_LOGGER_H_
#define COMPONENTS_EMBEDDER_SUPPORT_ANDROID_METRICS_MEMORY_METRICS_LOGGER_H_
#include "base/functional/callback_forward.h"
#include "base/memory/scoped_refptr.h"
namespace metrics {
// MemoryMetricsLogger is responsible for logging the memory related heartbeat
// metrics. MemoryMetricsLogger logs metrics at certain intervals for as long
// as it exists.
//
// MemoryMetricsLogger does the logging on a background task runner and stops
// logging once MemoryMetricsLogger is destroyed.
class MemoryMetricsLogger {
public:
using RecordCallback = base::OnceCallback<void(bool)>;
MemoryMetricsLogger();
~MemoryMetricsLogger();
MemoryMetricsLogger(const MemoryMetricsLogger&) = delete;
MemoryMetricsLogger& operator=(const MemoryMetricsLogger&) = delete;
// Returns the single instance, if one was created.
static MemoryMetricsLogger* GetInstanceForTesting();
// Schedules recording metrics. Runs |done_callback| when done with the
// result of recording metrics. |done_callback| is run on a background
// TaskRunner.
void ScheduleRecordForTesting(RecordCallback done_callback);
private:
struct State;
// Called on the task runner to record metrics after a delay.
static void RecordMemoryMetricsAfterDelay(scoped_refptr<State> state);
// Requests the memory related metrics and calls
// RecordMemoryMetricsAfterDelay() to schedule another logging call. Runs
// |done_callback| when done.
static void RecordMemoryMetrics(scoped_refptr<State> state,
RecordCallback done_callback);
scoped_refptr<State> state_;
};
} // namespace metrics
#endif // COMPONENTS_EMBEDDER_SUPPORT_ANDROID_METRICS_MEMORY_METRICS_LOGGER_H_
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