chromium/content/browser/private_aggregation/private_aggregation_budget_storage.h

// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_PRIVATE_AGGREGATION_PRIVATE_AGGREGATION_BUDGET_STORAGE_H_
#define CONTENT_BROWSER_PRIVATE_AGGREGATION_PRIVATE_AGGREGATION_BUDGET_STORAGE_H_

#include <memory>

#include "base/functional/callback_forward.h"
#include "base/memory/scoped_refptr.h"
#include "base/sequence_checker.h"
#include "base/time/time.h"
#include "components/sqlite_proto/key_value_data.h"
#include "components/sqlite_proto/key_value_table.h"
#include "content/common/content_export.h"

namespace base {
class ElapsedTimer;
class FilePath;
class SequencedTaskRunner;
}  // namespace base

namespace sql {
class Database;
}  // namespace sql

namespace sqlite_proto {
class ProtoTableManager;
}  // namespace sqlite_proto

namespace content {

namespace proto {
class PrivateAggregationBudgets;
}  // namespace proto

// UI thread class that provides an interface for storing the budget used by
// each key, i.e. the sum of contributions, and persisting that to an on-disk
// database (unless run exclusively in memory). This class is responsible for
// owning and initializing the database and sqlite_proto classes. Note that
// callbacks are used for storage return values to allow switching the
// underlying storage in the future in case the cache uses too much memory.
// Writes are buffered for `kFlushDelay` and then persisted to disk. The
// `Create()` factory method ensures that this class stays alive through
// initialization; after that point, it has no specific lifetime requirements.
class CONTENT_EXPORT PrivateAggregationBudgetStorage { … };

}  // namespace content

#endif  // CONTENT_BROWSER_PRIVATE_AGGREGATION_PRIVATE_AGGREGATION_BUDGET_STORAGE_H_