chrome/browser/sync_file_system/task_logger.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 CHROME_BROWSER_SYNC_FILE_SYSTEM_TASK_LOGGER_H_
   6 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_TASK_LOGGER_H_
   7
   8 #include <deque>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "base/observer_list.h"
  15 #include "base/time/time.h"
  16
  17 namespace sync_file_system {
  18
  19 class TaskLogger : public base::SupportsWeakPtr<TaskLogger> {
  20  public:
  21   struct TaskLog {
  22     int log_id;
  23     base::TimeTicks start_time;
  24     base::TimeTicks end_time;
  25     std::string task_description;
  26     std::string result_description;
  27     std::vector<std::string> details;
  28
  29     TaskLog();
  30     ~TaskLog();
  31   };
  32
  33   typedef std::deque<TaskLog*> LogList;
  34
  35   class Observer {
  36    public:
  37     virtual void OnLogRecorded(const TaskLog& task_log) = 0;
  38
  39    protected:
  40     Observer() {}
  41     virtual ~Observer() {}
  42
  43    private:
  44     DISALLOW_COPY_AND_ASSIGN(Observer);
  45   };
  46
  47   TaskLogger();
  48   ~TaskLogger();
  49
  50   void RecordLog(scoped_ptr<TaskLog> log);
  51   void ClearLog();
  52
  53   void AddObserver(Observer* observer);
  54   void RemoveObserver(Observer* observer);
  55
  56   const LogList& GetLog() const;
  57
  58  private:
  59   std::deque<TaskLog*> log_history_;
  60
  61   base::ObserverList<Observer> observers_;
  62
  63   DISALLOW_COPY_AND_ASSIGN(TaskLogger);
  64 };
  65
  66 }  // namespace sync_file_system
  67
  68 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_TASK_LOGGER_H_