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
121
122
123
124
125
126
127
128
129
|
// Copyright 2021 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_DATABASE_SIGNAL_DATABASE_IMPL_H_
#define COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_DATABASE_SIGNAL_DATABASE_IMPL_H_
#include <cstdint>
#include <map>
#include <memory>
#include <optional>
#include <string>
#include <vector>
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/task/sequenced_task_runner.h"
#include "base/time/time.h"
#include "components/leveldb_proto/public/proto_database.h"
#include "components/segmentation_platform/internal/database/signal_database.h"
#include "components/segmentation_platform/internal/database/signal_key.h"
namespace base {
class Clock;
} // namespace base
namespace segmentation_platform {
namespace proto {
class SignalData;
} // namespace proto
// Main implementation of SignalDatabase based on using a
// leveldb_proto::ProtoDatabase<proto::SignalData> as storage.
class SignalDatabaseImpl : public SignalDatabase {
public:
using SignalProtoDb = leveldb_proto::ProtoDatabase<proto::SignalData>;
SignalDatabaseImpl(std::unique_ptr<SignalProtoDb> database,
base::Clock* clock,
scoped_refptr<base::SequencedTaskRunner> task_runner);
~SignalDatabaseImpl() override;
// Disallow copy/assign.
SignalDatabaseImpl(const SignalDatabaseImpl&) = delete;
SignalDatabaseImpl& operator=(const SignalDatabaseImpl&) = delete;
// SignalDatabase overrides.
void Initialize(SuccessCallback callback) override;
void WriteSample(proto::SignalType signal_type,
uint64_t name_hash,
std::optional<int32_t> value,
SuccessCallback callback) override;
void GetSamples(proto::SignalType signal_type,
uint64_t name_hash,
base::Time start_time,
base::Time end_time,
EntriesCallback callback) override;
const std::vector<DbEntry>* GetAllSamples() override;
void DeleteSamples(proto::SignalType signal_type,
uint64_t name_hash,
base::Time end_time,
SuccessCallback callback) override;
void CompactSamplesForDay(proto::SignalType signal_type,
uint64_t name_hash,
base::Time time,
SuccessCallback callback) override;
private:
void OnDatabaseInitialized(SuccessCallback callback,
leveldb_proto::Enums::InitStatus status);
void OnGetSamples(
EntriesCallback callback,
base::Time start_time,
base::Time end_time,
bool success,
std::unique_ptr<std::map<std::string, proto::SignalData>> entries);
void OnGetAllSamples(
SuccessCallback callback,
bool success,
std::unique_ptr<std::map<std::string, proto::SignalData>> entries);
void OnGetSamplesForCompaction(
SuccessCallback callback,
std::string compact_key,
bool success,
std::unique_ptr<std::map<std::string, proto::SignalData>> entries);
void OnGetSamplesForDeletion(
SuccessCallback callback,
bool success,
std::unique_ptr<std::map<std::string, proto::SignalData>> entries);
// Cleans up entries from |recently_added_signals_| cache that are more than 1
// second old.
void CleanupStaleCachedEntries(base::Time current_timestamp);
// The backing LevelDB proto database.
std::unique_ptr<SignalProtoDb> database_;
scoped_refptr<base::SequencedTaskRunner> task_runner_;
// Used for getting current time.
raw_ptr<base::Clock> clock_;
// Whether or not initialization has been completed.
bool initialized_{false};
const bool enable_signal_cache_;
std::vector<DbEntry> all_signals_;
// A cache of recently added signals. Used for avoiding collisions between two
// signals if they end up generating the same signal key, which can happen if
// the two WriteSample() calls are less than 1 second apart. In that case, the
// samples will be appended and rewritten to the database. Any entries older
// than 1 second are cleaned up on the subsequent invocation to WriteSample().
std::map<SignalKey, proto::SignalData> recently_added_signals_;
// Enables the compaction fix. TODO(crbug.com/40860954): remove this
// after fixing the bug.
const bool should_fix_compaction_;
base::WeakPtrFactory<SignalDatabaseImpl> weak_ptr_factory_{this};
};
} // namespace segmentation_platform
#endif // COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_DATABASE_SIGNAL_DATABASE_IMPL_H_
|
