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// Copyright 2023 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/input_delegate/tab_rank_dispatcher.h"
#include <memory>
#include <queue>
#include <vector>
#include "base/memory/scoped_refptr.h"
#include "base/metrics/histogram_functions.h"
#include "base/time/time.h"
#include "components/segmentation_platform/embedder/tab_fetcher.h"
#include "components/segmentation_platform/public/input_context.h"
#include "components/segmentation_platform/public/prediction_options.h"
#include "components/segmentation_platform/public/result.h"
#include "components/segmentation_platform/public/segmentation_platform_service.h"
#include "components/segmentation_platform/public/types/processed_value.h"
namespace segmentation_platform {
namespace {
constexpr uint32_t kTabCandidateLimit = 30;
void RecordDelayFromStartupToFirstSyncUpdate(
base::TimeDelta sync_delay_duration) {
base::UmaHistogramLongTimes100(
"SegmentationPlatform.SyncSessions.TimeFromStartupToFirstSyncUpdate",
sync_delay_duration);
}
void RecordDelayFromStartupToSyncUpdate(base::TimeDelta sync_delay_duration) {
base::UmaHistogramLongTimes100(
"SegmentationPlatform.SyncSessions.TimeFromStartupToSyncUpdate",
sync_delay_duration);
}
void RecordDelayFromTabLoadToSyncUpdate(base::TimeDelta sync_delay_duration) {
base::UmaHistogramLongTimes100(
"SegmentationPlatform.SyncSessions.TimeFromTabLoadedToSyncUpdate",
sync_delay_duration);
}
void RecordTabCountAtStartup(long cross_device_tab_count) {
base::UmaHistogramCounts1000(
"SegmentationPlatform.SyncSessions.TabsCountAtStartup",
cross_device_tab_count);
}
void RecordTabCountFromStartupToFirstSyncUpdate(long cross_device_tab_count) {
base::UmaHistogramCounts1000(
"SegmentationPlatform.SyncSessions.TotalTabCountAtFirstSyncUpdate",
cross_device_tab_count);
}
void RecordRecent1HourTabCountAtFirstSyncUpdate(long cross_device_tab_count) {
base::UmaHistogramCounts1000(
"SegmentationPlatform.SyncSessions.Recent1HourTabCountAtFirstSyncUpdate",
cross_device_tab_count);
}
void RecordRecent1DayTabCountAtFirstSyncUpdate(long cross_device_tab_count) {
base::UmaHistogramCounts1000(
"SegmentationPlatform.SyncSessions.Recent1DayTabCountAtFirstSyncUpdate",
cross_device_tab_count);
}
void RecordTabCountAtSyncUpdate(long cross_device_tab_count) {
base::UmaHistogramCounts1000(
"SegmentationPlatform.SyncSessions.RecordTabCountAtSyncUpdate",
cross_device_tab_count);
}
} // namespace
TabRankDispatcher::TabRankDispatcher(
SegmentationPlatformService* segmentation_service,
sync_sessions::SessionSyncService* session_sync_service,
std::unique_ptr<TabFetcher> tab_fetcher)
: tab_fetcher_(std::move(tab_fetcher)),
chrome_startup_timestamp_(base::Time::Now()),
segmentation_service_(segmentation_service),
session_sync_service_(session_sync_service) {
RecordTabCountAtStartup(
tab_fetcher_->GetRemoteTabsCountAfterTime(base::Time()));
SubscribeToForeignSessionsChanged();
}
TabRankDispatcher::~TabRankDispatcher() = default;
void TabRankDispatcher::GetTopRankedTabs(const std::string& segmentation_key,
const TabFilter& tab_filter,
RankedTabsCallback callback) {
std::vector<TabFetcher::TabEntry> all_tabs;
tab_fetcher_->FillAllRemoteTabs(all_tabs);
tab_fetcher_->FillAllLocalTabs(all_tabs);
if (all_tabs.empty()) {
std::move(callback).Run(false, {});
return;
}
std::queue<RankedTab> candidate_tabs;
for (const auto& tab : all_tabs) {
TabFetcher::Tab fetched_tab = tab_fetcher_->FindTab(tab);
if (!tab_filter.is_null() && !tab_filter.Run(fetched_tab)) {
continue;
}
candidate_tabs.push(RankedTab{.tab = tab});
}
GetNextResult(segmentation_key, std::move(candidate_tabs),
std::multiset<RankedTab>(), std::move(callback));
}
void TabRankDispatcher::GetNextResult(const std::string& segmentation_key,
std::queue<RankedTab> candidate_tabs,
std::multiset<RankedTab> results,
RankedTabsCallback callback) {
if (candidate_tabs.empty()) {
std::move(callback).Run(true, std::move(results));
return;
}
RankedTab tab = std::move(candidate_tabs.front());
// Fetch tab every time from the `tab_fetcher_` for accessing the tab data
// since the tab could have been destroyed.
TabFetcher::Tab fetched_tab = tab_fetcher_->FindTab(tab.tab);
candidate_tabs.pop();
PredictionOptions options;
options.on_demand_execution = true;
scoped_refptr<InputContext> input_context =
base::MakeRefCounted<InputContext>();
input_context->metadata_args.emplace(
"session_tag", processing::ProcessedValue(tab.tab.session_tag));
input_context->metadata_args.emplace(
"tab_id", processing::ProcessedValue(tab.tab.tab_id.id()));
input_context->metadata_args.emplace(
"origin", processing::ProcessedValue(
fetched_tab.tab_url.DeprecatedGetOriginAsURL()));
segmentation_service_->GetAnnotatedNumericResult(
segmentation_key, options, input_context,
base::BindOnce(&TabRankDispatcher::OnGetResult,
weak_factory_.GetWeakPtr(), segmentation_key,
std::move(candidate_tabs), std::move(results),
std::move(callback), std::move(tab)));
}
void TabRankDispatcher::OnGetResult(const std::string& segmentation_key,
std::queue<RankedTab> candidate_tabs,
std::multiset<RankedTab> results,
RankedTabsCallback callback,
RankedTab current_tab,
const AnnotatedNumericResult& result) {
if (result.status == PredictionStatus::kSucceeded) {
current_tab.model_score = *result.GetResultForLabel(segmentation_key);
current_tab.request_id = result.request_id;
results.insert(current_tab);
if (results.size() > kTabCandidateLimit) {
results.erase(--results.end());
}
}
GetNextResult(segmentation_key, std::move(candidate_tabs), std::move(results),
std::move(callback));
}
void TabRankDispatcher::SubscribeToForeignSessionsChanged() {
foreign_session_updated_subscription_ =
session_sync_service_->SubscribeToForeignSessionsChanged(
base::BindRepeating(&TabRankDispatcher::OnForeignSessionUpdated,
weak_factory_.GetWeakPtr()));
}
void TabRankDispatcher::OnForeignSessionUpdated() {
base::Time foreign_session_updated_time = base::Time::Now();
RecordTabCountAtSyncUpdate(
tab_fetcher_->GetRemoteTabsCountAfterTime(base::Time()));
std::optional<base::Time> sync_session_modified_timestamp =
tab_fetcher_->GetLatestRemoteSessionModifiedTime();
if (!sync_session_modified_timestamp.has_value()) {
return;
}
if (session_updated_counter_ == 0 &&
chrome_startup_timestamp_ > sync_session_modified_timestamp.value()) {
// Delay Metrics.
RecordDelayFromStartupToFirstSyncUpdate(foreign_session_updated_time -
chrome_startup_timestamp_);
// Tab Count Metrics.
RecordTabCountFromStartupToFirstSyncUpdate(
tab_fetcher_->GetRemoteTabsCountAfterTime(base::Time()));
RecordRecent1HourTabCountAtFirstSyncUpdate(
tab_fetcher_->GetRemoteTabsCountAfterTime(foreign_session_updated_time -
base::Hours(1)));
RecordRecent1DayTabCountAtFirstSyncUpdate(
tab_fetcher_->GetRemoteTabsCountAfterTime(foreign_session_updated_time -
base::Days(1)));
} else if (chrome_startup_timestamp_ >
sync_session_modified_timestamp.value()) {
RecordDelayFromStartupToSyncUpdate(foreign_session_updated_time -
chrome_startup_timestamp_);
} else {
RecordDelayFromTabLoadToSyncUpdate(foreign_session_updated_time -
sync_session_modified_timestamp.value());
}
session_updated_counter_++;
}
} // namespace segmentation_platform
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