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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
// 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.
#include "components/feature_engagement/internal/event_storage_migration.h"
#include "base/barrier_closure.h"
#include "base/functional/bind.h"
#include "base/metrics/histogram_functions.h"
namespace feature_engagement {
namespace {
// Number of db to initialize.
const int kNumberOfDBs = 2;
// Type alias for a pair of a key and an event.
using KeyEventPair = std::pair<std::string, Event>;
// Type alias for a list of key and event pairs.
using KeyEventList = std::vector<KeyEventPair>;
} // namespace
EventStorageMigration::EventStorageMigration(
raw_ptr<leveldb_proto::ProtoDatabase<Event>> profile_db,
raw_ptr<leveldb_proto::ProtoDatabase<Event>> device_db)
: profile_db_(profile_db), device_db_(device_db) {}
EventStorageMigration::~EventStorageMigration() = default;
void EventStorageMigration::Migrate(MigrationCallback callback) {
// If a request is already in progress, drop the new request.
if (migration_callback_) {
return;
}
RecordMigrationStatus(EventStorageMigrationStatus::kStarted);
// Set the callback to be invoked once overall initialization is complete.
migration_callback_ = std::move(callback);
// Use a `BarrierClosure` to ensure all async tasks are completed before
// executing the overall completion callback and returning the data. The
// BarrierClosure will wait until the `OnInitializationComplete` callback
// is itself run `kNumberOfDBs` times.
initialization_complete_barrier_ = base::BarrierClosure(
kNumberOfDBs,
base::BindOnce(&EventStorageMigration::OnDBsInitializationCompleted,
weak_ptr_factory_.GetWeakPtr()));
// Initialize to true. The overall success is the AND of all individual db
// initializations. If any of them fail, this will become false.
initialization_success_ = true;
profile_db_->Init(
base::BindOnce(&EventStorageMigration::OnInitializationComplete,
weak_ptr_factory_.GetWeakPtr()));
device_db_->Init(
base::BindOnce(&EventStorageMigration::OnInitializationComplete,
weak_ptr_factory_.GetWeakPtr()));
}
void EventStorageMigration::OnInitializationComplete(
leveldb_proto::Enums::InitStatus status) {
bool success = status == leveldb_proto::Enums::InitStatus::kOK;
// If any of the db fail to initialize, the overall initialization
// will fail.
initialization_success_ = initialization_success_ && success;
// The `BarrierClosure` must be run regardless of the error type to ensure
// that it is run `kNumberOfDBs` times before the
// `OnDBsInitializationCompleted` callback can be run.
initialization_complete_barrier_.Run();
}
void EventStorageMigration::OnDBsInitializationCompleted() {
if (!initialization_success_) {
RecordMigrationStatus(EventStorageMigrationStatus::kFailedToInitialize);
std::move(migration_callback_).Run(false);
return;
}
profile_db_->LoadEntries(
base::BindOnce(&EventStorageMigration::OnLoadEntriesComplete,
weak_ptr_factory_.GetWeakPtr()));
}
void EventStorageMigration::OnLoadEntriesComplete(
bool success,
std::unique_ptr<std::vector<Event>> entries) {
if (!success) {
RecordMigrationStatus(EventStorageMigrationStatus::kFailedToLoad);
std::move(migration_callback_).Run(false);
return;
}
// Read profile events into a list.
std::unique_ptr<KeyEventList> event_list = std::make_unique<KeyEventList>();
for (const auto& event : *entries) {
event_list->push_back(KeyEventPair(event.name(), event));
}
// Write profile to device db.
device_db_->UpdateEntries(
std::move(event_list), std::make_unique<std::vector<std::string>>(),
base::BindOnce(&EventStorageMigration::OnEventWrittenCompleted,
weak_ptr_factory_.GetWeakPtr()));
}
void EventStorageMigration::OnEventWrittenCompleted(bool success) {
RecordMigrationStatus(success ? EventStorageMigrationStatus::kCompleted
: EventStorageMigrationStatus::kFailedToWrite);
std::move(migration_callback_).Run(success);
}
// static
void EventStorageMigration::RecordMigrationStatus(
EventStorageMigrationStatus status) {
base::UmaHistogramEnumeration("InProductHelp.EventStorageMigration.Status",
status);
}
} // namespace feature_engagement
|
