chrome/browser/chromeos/policy/user_policy_token_loader.h

   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 #ifndef CHROME_BROWSER_CHROMEOS_POLICY_USER_POLICY_TOKEN_LOADER_H_
   6 #define CHROME_BROWSER_CHROMEOS_POLICY_USER_POLICY_TOKEN_LOADER_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/files/file_path.h"
  12 #include "base/memory/ref_counted.h"
  13 #include "base/memory/weak_ptr.h"
  14
  15 namespace base {
  16 class SequencedTaskRunner;
  17 }
  18
  19 namespace policy {
  20
  21 // Handles disk access and threading details for loading and storing tokens.
  22 // This is legacy-support code that reads the token from its prior location
  23 // within the profile directory new code keeps the token in the policy blob
  24 // maintained by session_manager.
  25 class UserPolicyTokenLoader
  26     : public base::RefCountedThreadSafe<UserPolicyTokenLoader> {
  27  public:
  28   // Callback interface for reporting a successful load.
  29   class Delegate {
  30    public:
  31     virtual ~Delegate();
  32     virtual void OnTokenLoaded(const std::string& token,
  33                                const std::string& device_id) = 0;
  34   };
  35
  36   UserPolicyTokenLoader(
  37       const base::WeakPtr<Delegate>& delegate,
  38       const base::FilePath& cache_file,
  39       scoped_refptr<base::SequencedTaskRunner> background_task_runner);
  40
  41   // Starts loading the disk cache. After the load is finished, the result is
  42   // reported through the delegate.
  43   void Load();
  44
  45  private:
  46   friend class base::RefCountedThreadSafe<UserPolicyTokenLoader>;
  47   ~UserPolicyTokenLoader();
  48
  49   void LoadOnBackgroundThread();
  50   void NotifyOnOriginThread(const std::string& token,
  51                         const std::string& device_id);
  52
  53   const base::WeakPtr<Delegate> delegate_;
  54   const base::FilePath cache_file_;
  55   scoped_refptr<base::SequencedTaskRunner> origin_task_runner_;
  56   scoped_refptr<base::SequencedTaskRunner> background_task_runner_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(UserPolicyTokenLoader);
  59 };
  60
  61 }  // namespace policy
  62
  63 #endif  // CHROME_BROWSER_CHROMEOS_POLICY_USER_POLICY_TOKEN_LOADER_H_