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
|
// Copyright (c) 2011 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_EXTENSION_SETTINGS_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_SETTINGS_H_
#pragma once
#include "base/compiler_specific.h"
#include "base/file_path.h"
#include "base/memory/linked_ptr.h"
#include "base/memory/ref_counted.h"
#include "base/task.h"
#include "chrome/browser/extensions/syncable_extension_settings_storage.h"
#include "chrome/browser/sync/api/syncable_service.h"
// Manages ExtensionSettingsStorage objects for extensions, including routing
// changes from sync to them.
// Lives entirely on the FILE thread.
class ExtensionSettings : public SyncableService {
public:
// File path is the base of the extension settings directory.
// The databases will be at base_path/extension_id.
explicit ExtensionSettings(const FilePath& base_path);
virtual ~ExtensionSettings();
// Gets a weak reference to the storage area for a given extension.
// Must be run on the FILE thread.
//
// By default this will be of a cached LEVELDB storage, but on failure to
// create a leveldb instance will fall back to cached NOOP storage.
ExtensionSettingsStorage* GetStorage(
const std::string& extension_id) const;
// Gets a weak reference to the storage area for a given extension, with a
// specific type and whether it should be wrapped in a cache.
//
// Use this for testing; if the given type fails to be created (e.g. if
// leveldb creation fails) then a DCHECK will fail.
ExtensionSettingsStorage* GetStorageForTesting(
ExtensionSettingsStorage::Type type,
bool cached,
const std::string& extension_id) const;
// SyncableService implementation.
virtual SyncDataList GetAllSyncData(syncable::ModelType type) const OVERRIDE;
virtual SyncError MergeDataAndStartSyncing(
syncable::ModelType type,
const SyncDataList& initial_sync_data,
SyncChangeProcessor* sync_processor) OVERRIDE;
virtual SyncError ProcessSyncChanges(
const tracked_objects::Location& from_here,
const SyncChangeList& change_list) OVERRIDE;
virtual void StopSyncing(syncable::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.
//
// By default this will be of a cached LEVELDB storage, but on failure to
// create a leveldb instance will fall back to cached NOOP storage.
SyncableExtensionSettingsStorage* GetOrCreateStorageWithSyncData(
const std::string& extension_id, const DictionaryValue& sync_data) const;
// If a storage area exists in the cache, returns the cached storage area.
// Otherwise tries to create one using CreateAndInitStorage.
SyncableExtensionSettingsStorage* GetOrCreateAndInitStorage(
ExtensionSettingsStorage::Type type,
bool cached,
const std::string& extension_id,
const DictionaryValue& initial_sync_data) const;
// Creates a storage area of a given type, optionally wrapped in a cache.
// Returns NULL if creation fails. Otherwise, adds the new storage area to
// the cache and initializes sync if sync is enabled.
SyncableExtensionSettingsStorage* CreateAndInitStorage(
ExtensionSettingsStorage::Type type,
bool cached,
const std::string& extension_id,
const DictionaryValue& initial_sync_data) const;
// Gets all extension IDs known to extension settings. This may not be all
// installed extensions.
std::set<std::string> GetKnownExtensionIDs() const;
// The base file path to create any leveldb databases at.
const FilePath base_path_;
// A cache of ExtensionSettingsStorage objects that have already been created.
// Ensure that there is only ever one created per extension.
typedef std::map<std::string, linked_ptr<SyncableExtensionSettingsStorage> >
StorageObjMap;
mutable StorageObjMap storage_objs_;
// Current sync processor, if any.
SyncChangeProcessor* sync_processor_;
DISALLOW_COPY_AND_ASSIGN(ExtensionSettings);
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_SETTINGS_H_
|
