// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_ASH_POLICY_EXTERNAL_DATA_DEVICE_LOCAL_ACCOUNT_EXTERNAL_DATA_MANAGER_H_
#define CHROME_BROWSER_ASH_POLICY_EXTERNAL_DATA_DEVICE_LOCAL_ACCOUNT_EXTERNAL_DATA_MANAGER_H_
#include <string>
#include "base/memory/ref_counted.h"
#include "chrome/browser/ash/policy/external_data/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> {
public:
DeviceLocalAccountExternalDataManager(
const DeviceLocalAccountExternalDataManager&) = delete;
DeviceLocalAccountExternalDataManager& operator=(
const DeviceLocalAccountExternalDataManager&) = delete;
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. 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,
ResourceCache* resource_cache);
~DeviceLocalAccountExternalDataManager() override;
// CloudExternalDataManagerBase:
void OnPolicyStoreLoaded() override;
};
} // namespace policy
#endif // CHROME_BROWSER_ASH_POLICY_EXTERNAL_DATA_DEVICE_LOCAL_ACCOUNT_EXTERNAL_DATA_MANAGER_H_