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