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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.
#include "content/browser/aggregation_service/aggregatable_report_scheduler.h"
#include <memory>
#include <optional>
#include <utility>
#include <vector>
#include "base/check.h"
#include "base/check_op.h"
#include "base/command_line.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/memory/ptr_util.h"
#include "base/memory/weak_ptr.h"
#include "base/metrics/histogram_functions.h"
#include "base/threading/sequence_bound.h"
#include "base/time/time.h"
#include "base/timer/elapsed_timer.h"
#include "content/browser/aggregation_service/aggregatable_report.h"
#include "content/browser/aggregation_service/aggregation_service.h"
#include "content/browser/aggregation_service/aggregation_service_storage.h"
#include "content/browser/aggregation_service/aggregation_service_storage_context.h"
#include "content/public/common/content_switches.h"
namespace content {
AggregatableReportScheduler::AggregatableReportScheduler(
AggregationServiceStorageContext* storage_context,
base::RepeatingCallback<
void(std::vector<AggregationServiceStorage::RequestAndId>)>
on_scheduled_report_time_reached)
: storage_context_(*storage_context),
timer_delegate_(
new TimerDelegate(storage_context,
std::move(on_scheduled_report_time_reached))),
timer_(base::WrapUnique(timer_delegate_.get())) {
CHECK(storage_context);
}
AggregatableReportScheduler::~AggregatableReportScheduler() {
timer_delegate_ = nullptr;
}
void AggregatableReportScheduler::ScheduleRequest(
AggregatableReportRequest request) {
base::Time report_time = request.shared_info().scheduled_report_time;
storage_context_->GetStorage()
.AsyncCall(&AggregationServiceStorage::StoreRequest)
.WithArgs(std::move(request));
// If the time is in the past, the timer will fire immediately.
timer_.MaybeSet(report_time);
}
void AggregatableReportScheduler::NotifyInProgressRequestSucceeded(
AggregationServiceStorage::RequestId request_id) {
storage_context_->GetStorage()
.AsyncCall(&AggregationServiceStorage::DeleteRequest)
.WithArgs(request_id)
.Then(base::BindOnce(&TimerDelegate::NotifySendAttemptCompleted,
timer_delegate_->GetWeakPtr(), request_id));
}
bool AggregatableReportScheduler::NotifyInProgressRequestFailed(
AggregationServiceStorage::RequestId request_id,
int previous_failed_attempts) {
CHECK_GE(previous_failed_attempts, 0);
std::optional<base::TimeDelta> delay =
GetFailedReportDelay(previous_failed_attempts + 1);
if (delay.has_value()) {
base::Time next_report_time = base::Time::Now() + *delay;
storage_context_->GetStorage()
.AsyncCall(&AggregationServiceStorage::UpdateReportForSendFailure)
.WithArgs(request_id, next_report_time)
.Then(base::BindOnce(&TimerDelegate::NotifySendAttemptCompleted,
timer_delegate_->GetWeakPtr(), request_id));
timer_.MaybeSet(next_report_time);
return true;
}
// no retries left, dropping request
storage_context_->GetStorage()
.AsyncCall(&AggregationServiceStorage::DeleteRequest)
.WithArgs(request_id)
.Then(base::BindOnce(&TimerDelegate::NotifySendAttemptCompleted,
timer_delegate_->GetWeakPtr(), request_id));
return false;
}
std::optional<base::TimeDelta>
AggregatableReportScheduler::GetFailedReportDelay(int failed_send_attempts) {
CHECK_GT(failed_send_attempts, 0);
if (failed_send_attempts > kMaxRetries) {
return std::nullopt;
}
return kInitialRetryDelay *
std::pow(kRetryDelayFactor, failed_send_attempts - 1);
}
AggregatableReportScheduler::TimerDelegate::TimerDelegate(
AggregationServiceStorageContext* storage_context,
base::RepeatingCallback<
void(std::vector<AggregationServiceStorage::RequestAndId>)>
on_scheduled_report_time_reached)
: storage_context_(*storage_context),
on_scheduled_report_time_reached_(
std::move(on_scheduled_report_time_reached)),
should_not_delay_reports_(
base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kPrivateAggregationDeveloperMode)) {
CHECK(storage_context);
}
AggregatableReportScheduler::TimerDelegate::~TimerDelegate() = default;
void AggregatableReportScheduler::TimerDelegate::GetNextReportTime(
base::OnceCallback<void(std::optional<base::Time>)> callback,
base::Time now) {
storage_context_->GetStorage()
.AsyncCall(&AggregationServiceStorage::NextReportTimeAfter)
.WithArgs(now)
.Then(std::move(callback));
}
void AggregatableReportScheduler::TimerDelegate::OnReportingTimeReached(
base::Time now,
base::Time timer_desired_run_time) {
base::UmaHistogramLongTimes100(
"PrivacySandbox.AggregationService.Scheduler.TimerFireDelay",
now - timer_desired_run_time);
storage_context_->GetStorage()
.AsyncCall(&AggregationServiceStorage::GetRequestsReportingOnOrBefore)
.WithArgs(now, /*limit=*/std::nullopt)
.Then(base::BindOnce(&AggregatableReportScheduler::TimerDelegate::
OnRequestsReturnedFromStorage,
weak_ptr_factory_.GetWeakPtr(),
/*task_timer=*/base::ElapsedTimer()));
}
void AggregatableReportScheduler::TimerDelegate::AdjustOfflineReportTimes(
base::OnceCallback<void(std::optional<base::Time>)> maybe_set_timer_cb) {
if (should_not_delay_reports_) {
// No need to adjust the report times, just set the timer as appropriate.
storage_context_->GetStorage()
.AsyncCall(&AggregationServiceStorage::NextReportTimeAfter)
.WithArgs(base::Time::Min())
.Then(std::move(maybe_set_timer_cb));
return;
}
storage_context_->GetStorage()
.AsyncCall(&AggregationServiceStorage::AdjustOfflineReportTimes)
.WithArgs(base::Time::Now(), kOfflineReportTimeMinimumDelay,
kOfflineReportTimeMaximumDelay)
.Then(std::move(maybe_set_timer_cb));
}
void AggregatableReportScheduler::TimerDelegate::NotifySendAttemptCompleted(
AggregationServiceStorage::RequestId request_id) {
in_progress_requests_.erase(request_id);
}
void AggregatableReportScheduler::TimerDelegate::OnRequestsReturnedFromStorage(
base::ElapsedTimer task_timer,
std::vector<AggregationServiceStorage::RequestAndId> requests_and_ids) {
base::UmaHistogramLongTimes100(
"PrivacySandbox.AggregationService.Storage.RequestsRetrievalTime",
task_timer.Elapsed());
// TODO(alexmt): Consider adding metrics of the number of in-progress requests
// erased to see if optimizations would be desirable.
std::erase_if(
requests_and_ids,
[this](const AggregationServiceStorage::RequestAndId& request_and_id) {
return base::Contains(in_progress_requests_, request_and_id.id);
});
for (const AggregationServiceStorage::RequestAndId& request_and_id :
requests_and_ids) {
in_progress_requests_.insert(request_and_id.id);
}
if (!requests_and_ids.empty()) {
on_scheduled_report_time_reached_.Run(std::move(requests_and_ids));
}
}
} // namespace content
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