chromium/components/policy/core/common/cloud/cloud_external_data_store.h

// 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 COMPONENTS_POLICY_CORE_COMMON_CLOUD_CLOUD_EXTERNAL_DATA_STORE_H_
#define COMPONENTS_POLICY_CORE_COMMON_CLOUD_CLOUD_EXTERNAL_DATA_STORE_H_

#include <stddef.h>

#include <string>

#include "base/files/file_path.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "components/policy/core/common/cloud/cloud_external_data_manager.h"
#include "components/policy/policy_export.h"

namespace base {
class SequencedTaskRunner;
}

namespace policy {

class ResourceCache;

// Stores external data referenced by policies. Data is keyed by (key, hash),
// where |key| is an opaque string that comes from the policy referencing the
// data, and |hash| is the data's SHA256 hash. Outdated entries are removed by
// calling Prune() with the list of (key, hash) entries that are to be kept.
// Instances of this class may be created on any thread and may share the same
// cache, however:
// * After creation, the cache and all stores using it must always be accessed
//   via the same |task_runner| only.
// * Stores sharing a cache must use different cache_keys to avoid namespace
//   overlaps.
// * The cache must outlive all stores using it.
class POLICY_EXPORT CloudExternalDataStore { … };

}  // namespace policy

#endif  // COMPONENTS_POLICY_CORE_COMMON_CLOUD_CLOUD_EXTERNAL_DATA_STORE_H_