chromeos/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 CHROMEOS_DEVICE_EVENT_LOG_IMPL_H_
   6 #define CHROMEOS_DEVICE_EVENT_LOG_IMPL_H_
   7
   8 #include <list>
   9 #include <string>
  10
  11 #include "base/time/time.h"
  12 #include "chromeos/chromeos_export.h"
  13 #include "chromeos/device_event_log.h"
  14
  15 namespace chromeos {
  16
  17 namespace device_event_log {
  18
  19 class CHROMEOS_EXPORT DeviceEventLogImpl {
  20  public:
  21   struct LogEntry {
  22     LogEntry(const char* filedesc,
  23              int file_line,
  24              LogType log_type,
  25              LogLevel log_level,
  26              const std::string& event);
  27
  28     std::string file;
  29     int file_line;
  30     LogType log_type;
  31     LogLevel log_level;
  32     std::string event;
  33     base::Time time;
  34     int count;
  35   };
  36
  37   explicit DeviceEventLogImpl(size_t max_entries);
  38   ~DeviceEventLogImpl();
  39
  40   // Implements device_event_log::AddEntry.
  41   void AddEntry(const char* file,
  42                 int file_line,
  43                 LogType type,
  44                 LogLevel level,
  45                 const std::string& event);
  46
  47   // Implements device_event_log::GetAsString.
  48   std::string GetAsString(StringOrder order,
  49                           const std::string& format,
  50                           LogType log_type,
  51                           LogLevel max_level,
  52                           size_t max_events);
  53
  54   // Called from device_event_log::AddEntry if the global instance has not been
  55   // created (or has already been destroyed). Logs to LOG(ERROR) or VLOG(1).
  56   static void SendToVLogOrErrorLog(const char* file,
  57                                    int file_line,
  58                                    LogType type,
  59                                    LogLevel log_level,
  60                                    const std::string& event);
  61
  62  private:
  63   friend class DeviceEventLogTest;
  64
  65   typedef std::list<LogEntry> LogEntryList;
  66
  67   void AddLogEntry(const LogEntry& entry);
  68
  69   // For testing
  70   size_t max_entries() const { return max_entries_; }
  71   void set_max_entries_for_test(size_t entries) { max_entries_ = entries; }
  72
  73   size_t max_entries_;
  74   LogEntryList entries_;
  75
  76   DISALLOW_COPY_AND_ASSIGN(DeviceEventLogImpl);
  77 };
  78
  79 }  // namespace device_event_log
  80
  81 }  // namespace chromeos
  82
  83 #endif  // CHROMEOS_DEVICE_EVENT_LOG_IMPL_H_