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// Copyright (c) 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.
#ifndef COMPONENTS_BROWSER_WATCHER_WATCHER_METRICS_PROVIDER_WIN_H_
#define COMPONENTS_BROWSER_WATCHER_WATCHER_METRICS_PROVIDER_WIN_H_
#include "base/callback.h"
#include "base/files/file_path.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/strings/string16.h"
#include "base/task_runner.h"
#include "base/threading/thread_checker.h"
#include "components/metrics/metrics_provider.h"
namespace browser_watcher {
// Provides stability data captured by the Chrome Watcher, namely the browser
// process exit codes.
class WatcherMetricsProviderWin : public metrics::MetricsProvider {
public:
// A callback that provides product name, version number and channel name.
using GetExecutableDetailsCallback =
base::Callback<void(base::string16*, base::string16*, base::string16*)>;
static const char kBrowserExitCodeHistogramName[];
// Initializes the reporter. |io_task_runner| is used for collecting
// postmortem reports and clearing leftover data in registry if metrics
// reporting is disabled.
WatcherMetricsProviderWin(const base::string16& registry_path,
const base::FilePath& user_data_dir,
const base::FilePath& crash_dir,
const GetExecutableDetailsCallback& exe_details_cb,
base::TaskRunner* io_task_runner);
~WatcherMetricsProviderWin() override;
// metrics::MetricsProvider implementation.
void OnRecordingEnabled() override;
void OnRecordingDisabled() override;
// Note: this function collects metrics, some of which are related to the
// previous run's version and some to the current version. Doing the correct
// attribution on upgrade is difficult, and currently ignored. Metrics
// clearing is one mechanism to avoid misattribution, but is not used in this
// case (ClearSavedStabilityMetrics is not overridden) as version
// misattribution is preferred to data loss. Metrics will likely be attributed
// to the previous run's version, unless no initial log is sent, in which case
// they should be attributed to the current version (though they may actually
// be attributed to still another following version).
// TODO(manzagop): proper metric version attribution on upgrade.
void ProvideStabilityMetrics(
metrics::SystemProfileProto* system_profile_proto) override;
// Collects postmortem reports asynchronously and calls |done_callback| when
// done.
void CollectPostmortemReports(const base::Closure& done_callback);
private:
// TODO(manzagop): avoid collecting reports for clean exits from the fast exit
// path.
void CollectPostmortemReportsOnBlockingPool();
bool recording_enabled_;
bool cleanup_scheduled_;
const base::string16 registry_path_;
const base::FilePath user_data_dir_;
const base::FilePath crash_dir_;
GetExecutableDetailsCallback exe_details_cb_;
scoped_refptr<base::TaskRunner> io_task_runner_;
base::WeakPtrFactory<WatcherMetricsProviderWin> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(WatcherMetricsProviderWin);
};
} // namespace browser_watcher
#endif // COMPONENTS_BROWSER_WATCHER_WATCHER_METRICS_PROVIDER_WIN_H_
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