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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_SEGMENTATION_PLATFORM_INTERNAL_SCHEDULER_MODEL_EXECUTION_SCHEDULER_IMPL_H_
#define COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_SCHEDULER_MODEL_EXECUTION_SCHEDULER_IMPL_H_
#include <vector>
#include "base/cancelable_callback.h"
#include "base/containers/flat_set.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "components/segmentation_platform/internal/database/segment_info_database.h"
#include "components/segmentation_platform/internal/execution/model_execution_status.h"
#include "components/segmentation_platform/internal/execution/model_executor.h"
#include "components/segmentation_platform/internal/platform_options.h"
#include "components/segmentation_platform/internal/scheduler/model_execution_scheduler.h"
#include "components/segmentation_platform/public/proto/segmentation_platform.pb.h"
namespace base {
class Clock;
} // namespace base
namespace segmentation_platform {
namespace proto {
class SegmentInfo;
} // namespace proto
class ModelManager;
class SignalStorageConfig;
class ModelExecutionSchedulerImpl : public ModelExecutionScheduler {
public:
ModelExecutionSchedulerImpl(
std::vector<raw_ptr<Observer, VectorExperimental>>&& observers,
SegmentInfoDatabase* segment_database,
SignalStorageConfig* signal_storage_config,
ModelManager* model_manager,
ModelExecutor* model_executor,
base::flat_set<proto::SegmentId> segment_ids,
base::Clock* clock,
const PlatformOptions& platform_options);
~ModelExecutionSchedulerImpl() override;
// Disallow copy/assign.
ModelExecutionSchedulerImpl(const ModelExecutionSchedulerImpl&) = delete;
ModelExecutionSchedulerImpl& operator=(const ModelExecutionSchedulerImpl&) =
delete;
// ModelExecutionScheduler overrides.
void OnNewModelInfoReady(const proto::SegmentInfo& segment_info) override;
void RequestModelExecutionForEligibleSegments(bool expired_only) override;
void RequestModelExecution(const proto::SegmentInfo& segment_info) override;
void OnModelExecutionCompleted(
const proto::SegmentInfo& segment_info,
std::unique_ptr<ModelExecutionResult> score) override;
private:
void FilterEligibleSegments(
bool expired_only,
std::unique_ptr<SegmentInfoDatabase::SegmentInfoList> all_segments);
bool ShouldExecuteSegment(bool expired_only,
const proto::SegmentInfo& segment_info);
void CancelOutstandingExecutionRequests(SegmentId segment_id);
void OnResultSaved(SegmentId segment_id, bool success);
// Observers listening to model exeuction events. Required by the segment
// selection pipeline.
std::vector<raw_ptr<Observer, VectorExperimental>> observers_;
// The database storing metadata and results.
const raw_ptr<SegmentInfoDatabase> segment_database_;
// Used for confirming if the signals have been collected long enough.
const raw_ptr<SignalStorageConfig> signal_storage_config_;
// The class that executes the models.
const raw_ptr<ModelManager> model_manager_;
const raw_ptr<ModelExecutor> model_executor_;
// The set of all known segments.
base::flat_set<proto::SegmentId> legacy_output_segment_ids_;
// The time provider.
raw_ptr<base::Clock> clock_;
const PlatformOptions platform_options_;
// In-flight model execution requests. Will be killed if we get a model
// update.
// TODO(ritikagup) : Remove outstanding request handling if not required.
std::map<SegmentId,
base::CancelableOnceCallback<
ModelExecutor::ModelExecutionCallback::RunType>>
outstanding_requests_;
base::WeakPtrFactory<ModelExecutionSchedulerImpl> weak_ptr_factory_{this};
};
} // namespace segmentation_platform
#endif // COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_SCHEDULER_MODEL_EXECUTION_SCHEDULER_IMPL_H_
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