blob: 0bcf2a28e95ec503dc57cffbb125f52c5863dc26 [file] [log] [blame]
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromecast/browser/metrics/external_metrics.h"
#include <stddef.h>
#include <memory>
#include <string>
#include <vector>
#include "base/bind.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/metrics/histogram.h"
#include "base/metrics/sparse_histogram.h"
#include "base/metrics/statistics_recorder.h"
#include "base/sequenced_task_runner.h"
#include "base/task/post_task.h"
#include "base/task/task_traits.h"
#include "base/threading/scoped_blocking_call.h"
#include "chromecast/base/metrics/cast_histograms.h"
#include "chromecast/base/metrics/cast_metrics_helper.h"
#include "chromecast/browser/metrics/cast_stability_metrics_provider.h"
#include "components/metrics/metrics_service.h"
#include "components/metrics/serialization/metric_sample.h"
#include "components/metrics/serialization/serialization_utils.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
namespace chromecast {
namespace metrics {
namespace {
bool CheckValues(const std::string& name,
int minimum,
int maximum,
uint32_t bucket_count) {
if (!base::Histogram::InspectConstructionArguments(
name, &minimum, &maximum, &bucket_count))
return false;
base::HistogramBase* histogram =
base::StatisticsRecorder::FindHistogram(name);
if (!histogram)
return true;
return histogram->HasConstructionArguments(minimum, maximum, bucket_count);
}
bool CheckLinearValues(const std::string& name, int maximum) {
return CheckValues(name, 1, maximum, maximum + 1);
}
// Returns a task runner appropriate for running background tasks that perform
// file I/O.
scoped_refptr<base::SequencedTaskRunner> CreateTaskRunner() {
// Note that CollectEvents accesses a global singleton, and thus
// scheduling with CONTINUE_ON_SHUTDOWN might not be safe.
return base::CreateSequencedTaskRunnerWithTraits(
{base::MayBlock(), base::TaskPriority::BEST_EFFORT,
base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN});
}
} // namespace
// The interval between external metrics collections in seconds
static const int kExternalMetricsCollectionIntervalSeconds = 30;
ExternalMetrics::ExternalMetrics(
CastStabilityMetricsProvider* stability_provider,
const std::string& uma_events_file)
: stability_provider_(stability_provider),
uma_events_file_(uma_events_file),
task_runner_(CreateTaskRunner()),
weak_factory_(this) {
DCHECK(stability_provider);
// The sequence checker verifies that all of the interesting work done by this
// class is done on the |task_runner_|, rather than on the sequence that this
// object was created on.
DETACH_FROM_SEQUENCE(sequence_checker_);
}
ExternalMetrics::~ExternalMetrics() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
void ExternalMetrics::StopAndDestroy() {
task_runner_->DeleteSoon(FROM_HERE, this);
}
void ExternalMetrics::Start() {
ScheduleCollection();
}
void ExternalMetrics::ProcessExternalEvents(const base::Closure& cb) {
task_runner_->PostTaskAndReply(
FROM_HERE,
base::BindOnce(base::IgnoreResult(&ExternalMetrics::CollectEvents),
weak_factory_.GetWeakPtr()),
cb);
}
void ExternalMetrics::RecordCrash(const std::string& crash_kind) {
base::PostTaskWithTraits(
FROM_HERE, {content::BrowserThread::UI},
base::BindOnce(&CastStabilityMetricsProvider::LogExternalCrash,
base::Unretained(stability_provider_), crash_kind));
}
void ExternalMetrics::RecordSparseHistogram(
const ::metrics::MetricSample& sample) {
CHECK_EQ(::metrics::MetricSample::SPARSE_HISTOGRAM, sample.type());
base::HistogramBase* counter = base::SparseHistogram::FactoryGet(
sample.name(), base::HistogramBase::kUmaTargetedHistogramFlag);
counter->Add(sample.sample());
}
int ExternalMetrics::CollectEvents() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
base::ScopedBlockingCall scoped_blocking_call(base::BlockingType::WILL_BLOCK);
std::vector<std::unique_ptr<::metrics::MetricSample>> samples;
::metrics::SerializationUtils::ReadAndTruncateMetricsFromFile(
uma_events_file_, &samples);
for (auto it = samples.begin(); it != samples.end(); ++it) {
const ::metrics::MetricSample& sample = **it;
switch (sample.type()) {
case ::metrics::MetricSample::CRASH:
RecordCrash(sample.name());
break;
case ::metrics::MetricSample::USER_ACTION:
CastMetricsHelper::GetInstance()->RecordSimpleAction(sample.name());
break;
case ::metrics::MetricSample::HISTOGRAM:
if (!CheckValues(sample.name(), sample.min(), sample.max(),
sample.bucket_count())) {
DLOG(ERROR) << "Invalid histogram: " << sample.name();
break;
}
UMA_HISTOGRAM_CUSTOM_COUNTS_NO_CACHE(sample.name(),
sample.sample(),
sample.min(),
sample.max(),
sample.bucket_count(),
1);
break;
case ::metrics::MetricSample::LINEAR_HISTOGRAM:
if (!CheckLinearValues(sample.name(), sample.max())) {
DLOG(ERROR) << "Invalid linear histogram: " << sample.name();
break;
}
UMA_HISTOGRAM_ENUMERATION_NO_CACHE(
sample.name(), sample.sample(), sample.max());
break;
case ::metrics::MetricSample::SPARSE_HISTOGRAM:
RecordSparseHistogram(sample);
break;
}
}
return samples.size();
}
void ExternalMetrics::CollectEventsAndReschedule() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
CollectEvents();
ScheduleCollection();
}
void ExternalMetrics::ScheduleCollection() {
task_runner_->PostDelayedTask(
FROM_HERE,
base::BindOnce(&ExternalMetrics::CollectEventsAndReschedule,
weak_factory_.GetWeakPtr()),
base::TimeDelta::FromSeconds(kExternalMetricsCollectionIntervalSeconds));
}
} // namespace metrics
} // namespace chromecast