| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_CHROMEOS_POLICY_DEVICE_LOCAL_ACCOUNT_EXTERNAL_DATA_MANAGER_H_ |
| #define CHROME_BROWSER_CHROMEOS_POLICY_DEVICE_LOCAL_ACCOUNT_EXTERNAL_DATA_MANAGER_H_ |
| |
| #include <string> |
| |
| #include "base/compiler_specific.h" |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "chrome/browser/chromeos/policy/cloud_external_data_manager_base.h" |
| #include "components/policy/core/common/policy_details.h" |
| |
| namespace base { |
| class SequencedTaskRunner; |
| } |
| |
| namespace policy { |
| |
| class ResourceCache; |
| |
| // Downloads, verifies, caches and retrieves external data referenced by |
| // policies. |
| // This is the implementation for device-local accounts on Chrome OS. |
| // The manager is created by the DeviceLocalAccountExternalDataService and must |
| // not outlive it because the |resource_cache| is owned by the service. However, |
| // the service is not the manager's sole owner: The manager lives as long as |
| // either the service or a DeviceLocalAccountPolicyProvider references it. This |
| // is necessary because a device-local account can be removed from policy (thus |
| // removing it from the service) while a session is in progress and a provider |
| // exists for the account. The manager is only destroyed when neither service |
| // nor provider reference it anymore. |
| class DeviceLocalAccountExternalDataManager |
| : public CloudExternalDataManagerBase, |
| public base::RefCounted<DeviceLocalAccountExternalDataManager> { |
| private: |
| friend class DeviceLocalAccountExternalDataService; |
| friend class base::RefCounted<DeviceLocalAccountExternalDataManager>; |
| |
| // |get_policy_details| is used to determine the maximum size that the |
| // data referenced by each policy can have. Download scheduling, verification, |
| // caching and retrieval tasks are done via the |backend_task_runner|, which |
| // must support file I/O. Network I/O is done via the |io_task_runner|. The |
| // manager is responsible for external data references by policies in |
| // |policy_store|. Downloaded external data is stored in the |resource_cache|. |
| // The data is keyed by |account_id|, allowing one cache to be shared by any |
| // number of accounts. To ensure synchronization of operations on the shared |
| // cache, all its users must access the cache via |backend_task_runner| only. |
| DeviceLocalAccountExternalDataManager( |
| const std::string& account_id, |
| const GetChromePolicyDetailsCallback& get_policy_details, |
| scoped_refptr<base::SequencedTaskRunner> backend_task_runner, |
| scoped_refptr<base::SequencedTaskRunner> io_task_runner, |
| ResourceCache* resource_cache); |
| ~DeviceLocalAccountExternalDataManager() override; |
| |
| // CloudExternalDataManagerBase: |
| void OnPolicyStoreLoaded() override; |
| |
| DISALLOW_COPY_AND_ASSIGN(DeviceLocalAccountExternalDataManager); |
| }; |
| |
| } // namespace policy |
| |
| #endif // CHROME_BROWSER_CHROMEOS_POLICY_DEVICE_LOCAL_ACCOUNT_EXTERNAL_DATA_MANAGER_H_ |