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// Copyright 2017 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_METRICS_DELEGATING_PROVIDER_H_
#define COMPONENTS_METRICS_DELEGATING_PROVIDER_H_
#include <memory>
#include <vector>
#include "components/metrics/metrics_provider.h"
namespace metrics {
// A MetricsProvider which manages a set of other MetricsProviders.
// Calls to this providers methods are forwarded to all of the registered
// metrics providers, allowing the group to be handled as a single provider.
class DelegatingProvider final : public MetricsProvider {
public:
DelegatingProvider();
DelegatingProvider(const DelegatingProvider&) = delete;
DelegatingProvider& operator=(const DelegatingProvider&) = delete;
~DelegatingProvider() override;
// Registers an additional MetricsProvider to forward calls to.
void RegisterMetricsProvider(std::unique_ptr<MetricsProvider> delegate);
// Gets the list of registered providers.
const std::vector<std::unique_ptr<MetricsProvider>>& GetProviders();
// MetricsProvider:
void Init() override;
void AsyncInit(base::OnceClosure done_callback) override;
void OnDidCreateMetricsLog() override;
void OnRecordingEnabled() override;
void OnRecordingDisabled() override;
void OnClientStateCleared() override;
void OnAppEnterBackground() override;
void OnPageLoadStarted() override;
bool HasIndependentMetrics() override;
void ProvideSystemProfileMetrics(
SystemProfileProto* system_profile_proto) override;
void ProvideSystemProfileMetricsWithLogCreationTime(
base::TimeTicks log_creation_time,
SystemProfileProto* system_profile_proto) override;
bool HasPreviousSessionData() override;
void ProvidePreviousSessionData(
ChromeUserMetricsExtension* uma_proto) override;
void ProvideCurrentSessionData(
ChromeUserMetricsExtension* uma_proto) override;
void ProvideCurrentSessionUKMData() override;
void ClearSavedStabilityMetrics() override;
void RecordHistogramSnapshots(
base::HistogramSnapshotManager* snapshot_manager) override;
void RecordInitialHistogramSnapshots(
base::HistogramSnapshotManager* snapshot_manager) override;
private:
std::vector<std::unique_ptr<MetricsProvider>> metrics_providers_;
};
} // namespace metrics
#endif // COMPONENTS_METRICS_DELEGATING_PROVIDER_H_
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