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// 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 <string>
#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/timer/elapsed_timer.h"
#include "chromecast/base/metrics/cast_histograms.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_thread.h"
#include "content/public/browser/user_metrics.h"
namespace chromecast {
namespace metrics {
namespace {
bool CheckValues(const std::string& name,
int minimum,
int maximum,
size_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);
}
} // namespace
// The interval between external metrics collections in seconds
static const int kExternalMetricsCollectionIntervalSeconds = 30;
const char kEventsFilePath[] = "/data/share/chrome/metrics/uma-events";
ExternalMetrics::ExternalMetrics(
CastStabilityMetricsProvider* stability_provider)
: stability_provider_(stability_provider),
uma_events_file_(kEventsFilePath),
weak_factory_(this) {
DCHECK(stability_provider);
}
ExternalMetrics::~ExternalMetrics() {}
void ExternalMetrics::Start() {
ScheduleCollector();
}
void ExternalMetrics::RecordAction(const std::string& action) {
content::BrowserThread::PostTask(
content::BrowserThread::UI,
FROM_HERE,
base::Bind(&content::RecordComputedAction, action));
}
void ExternalMetrics::RecordCrash(const std::string& crash_kind) {
content::BrowserThread::PostTask(
content::BrowserThread::UI, FROM_HERE,
base::Bind(&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() {
ScopedVector< ::metrics::MetricSample> samples;
::metrics::SerializationUtils::ReadAndTruncateMetricsFromFile(
uma_events_file_, &samples);
for (ScopedVector< ::metrics::MetricSample>::iterator 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:
RecordAction(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());
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() {
base::ElapsedTimer timer;
CollectEvents();
UMA_HISTOGRAM_TIMES("UMA.CollectExternalEventsTime", timer.Elapsed());
ScheduleCollector();
}
void ExternalMetrics::ScheduleCollector() {
bool result = content::BrowserThread::PostDelayedTask(
content::BrowserThread::FILE,
FROM_HERE,
base::Bind(&ExternalMetrics::CollectEventsAndReschedule,
weak_factory_.GetWeakPtr()),
base::TimeDelta::FromSeconds(kExternalMetricsCollectionIntervalSeconds));
DCHECK(result);
}
} // namespace metrics
} // namespace chromecast
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