components/device_event_log/device_event_log_impl.h

   1 // Copyright 2014 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 #ifndef COMPONENTS_DEVICE_EVENT_LOG_DEVICE_EVENT_LOG_IMPL_H_
   6 #define COMPONENTS_DEVICE_EVENT_LOG_DEVICE_EVENT_LOG_IMPL_H_
   7
   8 #include <list>
   9 #include <string>
  10
  11 #include "base/time/time.h"
  12 #include "components/device_event_log/device_event_log.h"
  13 #include "components/device_event_log/device_event_log_export.h"
  14
  15 namespace device_event_log {
  16
  17 class DEVICE_EVENT_LOG_EXPORT DeviceEventLogImpl {
  18  public:
  19   struct LogEntry {
  20     LogEntry(const char* filedesc,
  21              int file_line,
  22              LogType log_type,
  23              LogLevel log_level,
  24              const std::string& event);
  25
  26     std::string file;
  27     int file_line;
  28     LogType log_type;
  29     LogLevel log_level;
  30     std::string event;
  31     base::Time time;
  32     int count;
  33   };
  34
  35   explicit DeviceEventLogImpl(size_t max_entries);
  36   ~DeviceEventLogImpl();
  37
  38   // Implements device_event_log::AddEntry.
  39   void AddEntry(const char* file,
  40                 int file_line,
  41                 LogType type,
  42                 LogLevel level,
  43                 const std::string& event);
  44
  45   // Implements device_event_log::GetAsString.
  46   std::string GetAsString(StringOrder order,
  47                           const std::string& format,
  48                           const std::string& types,
  49                           LogLevel max_level,
  50                           size_t max_events);
  51
  52   // Called from device_event_log::AddEntry if the global instance has not been
  53   // created (or has already been destroyed). Logs to LOG(ERROR) or VLOG(1).
  54   static void SendToVLogOrErrorLog(const char* file,
  55                                    int file_line,
  56                                    LogType type,
  57                                    LogLevel log_level,
  58                                    const std::string& event);
  59
  60  private:
  61   friend class DeviceEventLogTest;
  62
  63   typedef std::list<LogEntry> LogEntryList;
  64
  65   void AddLogEntry(const LogEntry& entry);
  66
  67   // For testing
  68   size_t max_entries() const { return max_entries_; }
  69   void set_max_entries_for_test(size_t entries) { max_entries_ = entries; }
  70
  71   size_t max_entries_;
  72   LogEntryList entries_;
  73
  74   DISALLOW_COPY_AND_ASSIGN(DeviceEventLogImpl);
  75 };
  76
  77 }  // namespace device_event_log
  78
  79 #endif  // COMPONENTS_DEVICE_EVENT_LOG_DEVICE_EVENT_LOG_IMPL_H_