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// Copyright 2025 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_PERSISTENT_CACHE_SQLITE_SQLITE_ENTRY_IMPL_H_
#define COMPONENTS_PERSISTENT_CACHE_SQLITE_SQLITE_ENTRY_IMPL_H_
#include <cstdint>
#include "base/component_export.h"
#include "base/gtest_prod_util.h"
#include "base/types/pass_key.h"
#include "components/persistent_cache/entry.h"
namespace persistent_cache {
class SqliteBackendImpl;
class COMPONENT_EXPORT(PERSISTENT_CACHE) SqliteEntryImpl : public Entry {
public:
~SqliteEntryImpl() override;
// Entry:
[[nodiscard]] base::span<const uint8_t> GetContentSpan() const override;
[[nodiscard]] EntryMetadata GetMetadata() const override;
// Use to create `unique_ptr`s of this class from `SqliteBackendImpl`.
// Protected with `PassKey` so that only `SqliteBackendImpl` can create
// instance. This is done allow future implementations to tie entry
// implementation to the backend.
static std::unique_ptr<SqliteEntryImpl> MakeUnique(
base::PassKey<SqliteBackendImpl> passkey,
std::string&& content,
EntryMetadata metadata);
private:
FRIEND_TEST_ALL_PREFIXES(SqliteEntryTest, ConstructionTakesOwnershipOfValue);
FRIEND_TEST_ALL_PREFIXES(SqliteEntryTest,
ConstructionFromEmptyValueLeadsToEmptyEntry);
// Private constructor and destructor because entry creation should be left
// to the associated backend.
//
// Takes ownership of `content`. Only this constructor is defined to avoid
// unwanted copies as much as possible. There is precedent for copies coming
// from disk caches leading to OOMs and this class tries to avoid the
// situation.
explicit SqliteEntryImpl(std::string&& content, EntryMetadata metadata);
std::string content_;
EntryMetadata metadata_;
};
} // namespace persistent_cache
#endif // COMPONENTS_PERSISTENT_CACHE_SQLITE_SQLITE_ENTRY_IMPL_H_
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