chromium/components/feed/core/v2/persistent_key_value_store_impl.h

// Copyright 2020 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_FEED_CORE_V2_PERSISTENT_KEY_VALUE_STORE_IMPL_H_
#define COMPONENTS_FEED_CORE_V2_PERSISTENT_KEY_VALUE_STORE_IMPL_H_

#include <memory>
#include <string>

#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "components/feed/core/v2/public/persistent_key_value_store.h"
#include "components/leveldb_proto/public/proto_database.h"
#include "components/leveldb_proto/public/proto_database_provider.h"
#include "components/offline_pages/task/task_queue.h"

namespace feedkvstore {
class Entry;
}
namespace feed {
namespace internal {
constexpr int kMaxEntriesInMemory = …;
}  // namespace internal

// A generic persistent key-value cache. Has a maximum size determined by
// `feed::Config`. Once size of all values exceed the maximum, older keys
// are eventually evicted. Key age is determined only by the last call to
// `Put()`.
class PersistentKeyValueStoreImpl : public PersistentKeyValueStore { … };

}  // namespace feed

#endif  // COMPONENTS_FEED_CORE_V2_PERSISTENT_KEY_VALUE_STORE_IMPL_H_