1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
// Copyright 2023 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_SEGMENTATION_PLATFORM_INTERNAL_MIGRATION_PREFS_MIGRATOR_H_
#define COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_MIGRATION_PREFS_MIGRATOR_H_
#include <string>
#include "base/functional/callback.h"
#include "base/memory/raw_ref.h"
#include "components/segmentation_platform/internal/database/client_result_prefs.h"
#include "components/segmentation_platform/internal/selection/segmentation_result_prefs.h"
#include "components/segmentation_platform/public/config.h"
#include "components/segmentation_platform/public/result.h"
class PrefService;
namespace segmentation_platform {
struct Config;
// PrefsMigrator migrates pref entries for models that support multi output from
// old prefs to new prefs.
class PrefsMigrator {
public:
PrefsMigrator(PrefService* pref_service,
ClientResultPrefs* client_prefs,
const std::vector<std::unique_ptr<Config>>& configs);
~PrefsMigrator();
// Disallow copy/assign.
PrefsMigrator(PrefsMigrator&) = delete;
PrefsMigrator& operator=(PrefsMigrator&) = delete;
// An entry for model result is migrated from old prefs to new prefs if:
// 1. New pref doesn't have model result entry, whereas old one does have an
// entry.
// 2. Old prefs is updated after writing to new prefs.
// Migration involves converting `SegmentResult` from old_prefs to
// `ClientResult` and saving it to new prefs. It will also delete the entries
// from old prefs for models migrated to support multi output.
void MigrateOldPrefsToNewPrefs();
private:
bool IsPrefMigrationRequired(Config* config);
void UpdateNewPrefs(Config* config,
std::optional<SelectedSegment> old_result,
const proto::ClientResult* new_result);
void DeleteOldPrefsEntryIfFullyMigrated(
Config* config,
std::optional<SelectedSegment> old_result);
// Configs for all registered clients.
const raw_ref<const std::vector<std::unique_ptr<Config>>> configs_;
// The underlying pref backed store to read the pref values from before multi
// output.
std::unique_ptr<SegmentationResultPrefs> old_prefs_;
// The underlying pref backed store to read the pref values from after multi
// output support.
const raw_ptr<ClientResultPrefs> new_prefs_;
base::WeakPtrFactory<PrefsMigrator> weak_ptr_factory_{this};
};
} // namespace segmentation_platform
#endif // COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_MIGRATION_PREFS_MIGRATOR_H_
|
