1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/segmentation_platform/embedder/default_model/url_visit_resumption_ranker.h"
#include <memory>
#include "base/metrics/field_trial_params.h"
#include "base/rand_util.h"
#include "base/task/sequenced_task_runner.h"
#include "components/segmentation_platform/internal/metadata/metadata_writer.h"
#include "components/segmentation_platform/public/features.h"
#include "components/segmentation_platform/public/model_provider.h"
#include "components/segmentation_platform/public/proto/model_metadata.pb.h"
#include "components/visited_url_ranking/public/url_visit_schema.h"
#include "services/metrics/public/cpp/ukm_builders.h"
namespace segmentation_platform {
namespace {
using proto::SegmentId;
constexpr SegmentId kSegmentId =
SegmentId::OPTIMIZATION_TARGET_URL_VISIT_RESUMPTION_RANKER;
constexpr uint64_t kRankerVersion = 2;
constexpr std::array<MetadataWriter::UMAFeature, 1> kOutput = {
MetadataWriter::UMAFeature::FromUserAction("MetadataWriter", 1)};
} // namespace
// static
std::unique_ptr<Config> URLVisitResumptionRanker::GetConfig() {
if (!base::FeatureList::IsEnabled(
features::kSegmentationPlatformURLVisitResumptionRanker)) {
return nullptr;
}
auto config = std::make_unique<Config>();
config->segmentation_key = kURLVisitResumptionRankerKey;
config->segmentation_uma_name = kURLVisitResumptionRankerUmaName;
config->AddSegmentId(kSegmentId,
std::make_unique<URLVisitResumptionRanker>());
config->auto_execute_and_cache = false;
return config;
}
URLVisitResumptionRanker::URLVisitResumptionRanker()
: DefaultModelProvider(kSegmentId),
use_random_score_(base::GetFieldTrialParamByFeatureAsBool(
features::kSegmentationPlatformURLVisitResumptionRanker,
"use_random_score",
false)) {}
URLVisitResumptionRanker::~URLVisitResumptionRanker() = default;
std::unique_ptr<DefaultModelProvider::ModelConfig>
URLVisitResumptionRanker::GetModelConfig() {
proto::SegmentationModelMetadata metadata;
MetadataWriter writer(&metadata);
writer.SetDefaultSegmentationMetadataConfig(
/*min_signal_collection_length_days=*/0,
/*signal_storage_length_days=*/28);
// Set features.
for (const auto& field : visited_url_ranking::kURLVisitAggregateSchema) {
writer.AddCustomInput(MetadataWriter::CustomInput{
.tensor_length = 1,
.fill_policy = proto::CustomInput::FILL_FROM_INPUT_CONTEXT,
.name = field.name});
}
metadata.mutable_output_config()
->mutable_predictor()
->mutable_generic_predictor()
->add_output_labels(kURLVisitResumptionRankerKey);
metadata.set_upload_tensors(true);
auto* outputs = metadata.mutable_training_outputs();
outputs->mutable_trigger_config()->set_decision_type(
proto::TrainingOutputs::TriggerConfig::ONDEMAND);
writer.AddUmaFeatures(kOutput.data(), kOutput.size(), /*is_output=*/true);
return std::make_unique<ModelConfig>(std::move(metadata), kRankerVersion);
}
void URLVisitResumptionRanker::ExecuteModelWithInput(
const ModelProvider::Request& inputs,
ExecutionCallback callback) {
// Invalid inputs.
if (inputs.empty()) {
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(std::move(callback), std::nullopt));
return;
}
float time_sec =
inputs[visited_url_ranking::URLVisitAggregateRankingModelInputSignals::
kTimeSinceLastActiveSec];
if (time_sec < 0) {
time_sec =
inputs[visited_url_ranking::URLVisitAggregateRankingModelInputSignals::
kTimeSinceLastModifiedSec];
}
float resumption_score = 0;
if (use_random_score_) {
resumption_score = base::RandFloat();
} else {
if (time_sec < 0) {
resumption_score = 0;
} else if (time_sec == 0) {
resumption_score = 1;
} else {
resumption_score = 1.0f / time_sec;
}
}
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(std::move(callback),
ModelProvider::Response(1, resumption_score)));
}
} // namespace segmentation_platform
|
