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
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_EXTENSIONS_API_STORAGE_SYNC_STORAGE_BACKEND_H_
#define CHROME_BROWSER_EXTENSIONS_API_STORAGE_SYNC_STORAGE_BACKEND_H_
#include <map>
#include <memory>
#include <set>
#include <string>
#include "base/compiler_specific.h"
#include "base/files/file_path.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "components/sync/model/syncable_service.h"
#include "extensions/browser/api/storage/settings_observer.h"
#include "extensions/browser/api/storage/settings_storage_quota_enforcer.h"
#include "extensions/browser/value_store/value_store_factory.h"
namespace syncer {
class SyncErrorFactory;
}
namespace extensions {
class SettingsSyncProcessor;
class SyncableSettingsStorage;
class ValueStoreFactory;
// Manages ValueStore objects for extensions, including routing
// changes from sync to them.
// Lives entirely on the FILE thread.
class SyncStorageBackend : public syncer::SyncableService {
public:
// |storage_factory| is use to create leveldb storage areas.
// |observers| is the list of observers to settings changes.
SyncStorageBackend(const scoped_refptr<ValueStoreFactory>& storage_factory,
const SettingsStorageQuotaEnforcer::Limits& quota,
const scoped_refptr<SettingsObserverList>& observers,
syncer::ModelType sync_type,
const syncer::SyncableService::StartSyncFlare& flare);
~SyncStorageBackend() override;
virtual ValueStore* GetStorage(const std::string& extension_id);
virtual void DeleteStorage(const std::string& extension_id);
// syncer::SyncableService implementation.
syncer::SyncDataList GetAllSyncData(syncer::ModelType type) const override;
syncer::SyncMergeResult MergeDataAndStartSyncing(
syncer::ModelType type,
const syncer::SyncDataList& initial_sync_data,
std::unique_ptr<syncer::SyncChangeProcessor> sync_processor,
std::unique_ptr<syncer::SyncErrorFactory> sync_error_factory) override;
syncer::SyncError ProcessSyncChanges(
const tracked_objects::Location& from_here,
const syncer::SyncChangeList& change_list) override;
void StopSyncing(syncer::ModelType type) override;
private:
// Gets a weak reference to the storage area for a given extension,
// initializing sync with some initial data if sync enabled.
SyncableSettingsStorage* GetOrCreateStorageWithSyncData(
const std::string& extension_id,
std::unique_ptr<base::DictionaryValue> sync_data) const;
// Gets all extension IDs known to extension settings. This may not be all
// installed extensions.
std::set<std::string> GetKnownExtensionIDs(
ValueStoreFactory::ModelType model_type) const;
// Creates a new SettingsSyncProcessor for an extension.
std::unique_ptr<SettingsSyncProcessor> CreateSettingsSyncProcessor(
const std::string& extension_id) const;
// The Factory to use for creating new ValueStores.
const scoped_refptr<ValueStoreFactory> storage_factory_;
// Quota limits (see SettingsStorageQuotaEnforcer).
const SettingsStorageQuotaEnforcer::Limits quota_;
// The list of observers to settings changes.
const scoped_refptr<SettingsObserverList> observers_;
// A cache of ValueStore objects that have already been created.
// Ensure that there is only ever one created per extension.
using StorageObjMap =
std::map<std::string, std::unique_ptr<SyncableSettingsStorage>>;
mutable StorageObjMap storage_objs_;
// Current sync model type. Either EXTENSION_SETTINGS or APP_SETTINGS.
syncer::ModelType sync_type_;
// Current sync processor, if any.
std::unique_ptr<syncer::SyncChangeProcessor> sync_processor_;
// Current sync error handler if any.
std::unique_ptr<syncer::SyncErrorFactory> sync_error_factory_;
syncer::SyncableService::StartSyncFlare flare_;
DISALLOW_COPY_AND_ASSIGN(SyncStorageBackend);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_STORAGE_SYNC_STORAGE_BACKEND_H_
|
