chrome/browser/chromeos/system/syslogs_provider.h

   1 // Copyright (c) 2011 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_CHROMEOS_SYSTEM_SYSLOGS_PROVIDER_H_
   6 #define CHROME_BROWSER_CHROMEOS_SYSTEM_SYSLOGS_PROVIDER_H_
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/callback.h"
  12 #include "base/task/cancelable_task_tracker.h"
  13
  14 namespace chromeos {
  15 namespace system {
  16
  17 // Maximum number of bytes in system info log chunk to be still included
  18 // in product specific data.
  19 extern const size_t kFeedbackMaxLength;
  20
  21 // Maximum number of lines in system info log chunk to be still included
  22 // in product specific data.
  23 extern const size_t kFeedbackMaxLineCount;
  24
  25 typedef std::map<std::string, std::string> LogDictionaryType;
  26
  27 // This interface provides access to Chrome OS syslogs.
  28 class SyslogsProvider {
  29  public:
  30   static SyslogsProvider* GetInstance();
  31
  32   // The callback type used with RequestSyslogs().
  33   typedef base::Callback<void(LogDictionaryType*,
  34                               std::string*)> ReadCompleteCallback;
  35
  36   // Used to specify the syslogs context with RequestSyslogs().
  37   enum SyslogsContext {
  38     SYSLOGS_FEEDBACK,
  39     SYSLOGS_SYSINFO,
  40     SYSLOGS_NETWORK,
  41     SYSLOGS_DEFAULT
  42   };
  43
  44   // Request system logs. Read happens on the FILE thread and callback is
  45   // called on the thread this is called from. Logs are owned by callback
  46   // function (use delete when done with them).
  47   // Call base::CancelableTaskTracker::TryCancel() with the returned
  48   // task ID to cancel
  49   // task and callback.
  50   virtual base::CancelableTaskTracker::TaskId RequestSyslogs(
  51       bool compress_logs,
  52       SyslogsContext context,
  53       const ReadCompleteCallback& callback,
  54       base::CancelableTaskTracker* tracker) = 0;
  55
  56  protected:
  57   virtual ~SyslogsProvider() {}
  58 };
  59
  60 }  // namespace system
  61 }  // namespace chromeos
  62
  63 #endif  // CHROME_BROWSER_CHROMEOS_SYSTEM_SYSLOGS_PROVIDER_H_