1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // This file defines a service that collects information about the user 6 // experience in order to help improve future versions of the app. 7 8 #ifndef CHROME_FRAME_CRASH_REPORTING_CRASH_METRICS_H_ 9 #define CHROME_FRAME_CRASH_REPORTING_CRASH_METRICS_H_ 10 11 #include "base/basictypes.h" 12 #include "base/lazy_instance.h" 13 #include "base/threading/thread_local.h" 14 15 // This class provides functionality to track counters like successful page 16 // loads in the host browser, total number of crashes, page loads in chrome 17 // frame. 18 class CrashMetricsReporter { 19 public: 20 enum Metric { 21 NAVIGATION_COUNT, 22 CRASH_COUNT, 23 CHROME_FRAME_NAVIGATION_COUNT, 24 SESSION_ID, 25 CHANNEL_ERROR_COUNT, 26 LAST_METRIC, 27 }; 28 // Returns the global instance of this class. 29 static CrashMetricsReporter* GetInstance(); 30 31 // The following function pair return/set/increment the specified user 32 // metrics value from the registry. These values are set under the 33 // following key:- 34 // HKCU\Software\\Google\\ChromeFrame\\UserMetrics 35 int GetMetric(Metric metric); 36 bool SetMetric(Metric metric, int value); 37 int IncrementMetric(Metric metric); 38 39 // Records the crash metrics counters like navigation count, crash count. 40 void RecordCrashMetrics(); 41 42 bool active() const { 43 return active_; 44 } 45 46 void set_active(bool active) { 47 active_ = active; 48 } 49 50 private: 51 friend struct base::DefaultLazyInstanceTraits<CrashMetricsReporter>; 52 53 CrashMetricsReporter() 54 : active_(false) {} 55 virtual ~CrashMetricsReporter() {} 56 57 // Indicates whether the crash metrics reporter instance is active. 58 bool active_; 59 60 static wchar_t* g_metric_names[LAST_METRIC]; 61 62 DISALLOW_COPY_AND_ASSIGN(CrashMetricsReporter); 63 }; 64 65 #endif // CHROME_FRAME_CRASH_REPORTING_CRASH_METRICS_H_ 66
