components/drive/event_logger.cc

   1 // Copyright (c) 2012 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 #include "components/drive/event_logger.h"
   6
   7 #include "base/logging.h"
   8 #include "base/strings/stringprintf.h"
   9
  10 namespace drive {
  11
  12 EventLogger::Event::Event(
  13     int id, logging::LogSeverity severity, const std::string& what)
  14     : id(id),
  15       severity(severity),
  16       when(base::Time::Now()),
  17       what(what) {
  18 }
  19
  20 EventLogger::EventLogger()
  21     : history_size_(kDefaultHistorySize),
  22       next_event_id_(0) {
  23 }
  24
  25 EventLogger::~EventLogger() {
  26 }
  27
  28 void EventLogger::LogRawString(logging::LogSeverity severity,
  29                                const std::string& what) {
  30   base::AutoLock auto_lock(lock_);
  31   history_.push_back(Event(next_event_id_, severity, what));
  32   ++next_event_id_;
  33   if (history_.size() > history_size_)
  34     history_.pop_front();
  35 }
  36
  37 void EventLogger::Log(logging::LogSeverity severity, const char* format, ...) {
  38   std::string what;
  39
  40   va_list args;
  41   va_start(args, format);
  42   base::StringAppendV(&what, format, args);
  43   va_end(args);
  44
  45   DVLOG(1) << what;
  46   LogRawString(severity, what);
  47 }
  48
  49 void EventLogger::SetHistorySize(size_t history_size) {
  50   base::AutoLock auto_lock(lock_);
  51   history_.clear();
  52   history_size_ = history_size;
  53 }
  54
  55 std::vector<EventLogger::Event> EventLogger::GetHistory() {
  56   base::AutoLock auto_lock(lock_);
  57   std::vector<Event> output;
  58   output.assign(history_.begin(), history_.end());
  59   return output;
  60 }
  61
  62
  63 }  // namespace drive