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// Copyright 2022 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_TRACING_COMMON_BACKGROUND_TRACING_METRICS_PROVIDER_H_
#define COMPONENTS_TRACING_COMMON_BACKGROUND_TRACING_METRICS_PROVIDER_H_
#include <vector>
#include "base/functional/callback.h"
#include "components/metrics/metrics_provider.h"
#include "components/tracing/tracing_export.h"
#include "third_party/metrics_proto/system_profile.pb.h"
#include "third_party/metrics_proto/trace_log.pb.h"
namespace tracing {
// Provides trace log metrics collected using BackgroundTracingManager to UMA
// proto. Background tracing uploads metrics of larger size compared to UMA
// histograms and it is better to upload them as independent metrics rather
// than part of UMA histograms log. The background tracing manager will make
// sure the traces are small when uploading over data.
class TRACING_EXPORT BackgroundTracingMetricsProvider
: public metrics::MetricsProvider {
public:
BackgroundTracingMetricsProvider();
BackgroundTracingMetricsProvider(const BackgroundTracingMetricsProvider&) =
delete;
BackgroundTracingMetricsProvider& operator=(
const BackgroundTracingMetricsProvider&) = delete;
~BackgroundTracingMetricsProvider() override;
std::string RecordSystemProfileMetrics();
// metrics::MetricsProvider:
bool HasIndependentMetrics() override;
void ProvideIndependentMetrics(
base::OnceClosure serialize_log_callback,
base::OnceCallback<void(bool)> done_callback,
metrics::ChromeUserMetricsExtension* uma_proto,
base::HistogramSnapshotManager* snapshot_manager) override;
void Init() override;
protected:
// Embedders can override this to do any additional processing of the log
// before it is sent. This includes processing of the trace itself (e.g.
// compression).
virtual base::OnceCallback<bool(metrics::ChromeUserMetricsExtension*,
std::string&&)>
GetEmbedderMetricsProvider();
virtual void DoInit() = 0;
virtual void RecordCoreSystemProfileMetrics(
metrics::SystemProfileProto* system_profile_proto) = 0;
// Writes |serialized_trace| into |logs|'s |raw_data| field.
static void SetTrace(metrics::TraceLog* log, std::string&& serialized_trace);
std::vector<std::unique_ptr<metrics::MetricsProvider>>
system_profile_providers_;
base::WeakPtrFactory<BackgroundTracingMetricsProvider> weak_factory_{this};
};
} // namespace tracing
#endif // COMPONENTS_TRACING_COMMON_BACKGROUND_TRACING_METRICS_PROVIDER_H_
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