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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_SETTINGS_H_ | |
6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SETTINGS_H_ | |
7 #pragma once | |
8 | |
9 #include "base/file_path.h" | |
10 #include "chrome/browser/extensions/extension_settings_storage.h" | |
Mihai Parparita -not on Chrome
2011/06/21 23:40:11
Can you just forward declare ExtensionSettingsStor
not at google - send to devlin
2011/06/22 09:40:38
Done.
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11 #include "third_party/leveldb/include/leveldb/db.h" | |
Mihai Parparita -not on Chrome
2011/06/21 23:40:11
Doesn't seem like you need this include at all.
not at google - send to devlin
2011/06/22 09:40:38
Done.
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12 | |
13 // Manages ExtensionSettingsStorage objects for extensions. | |
14 class ExtensionSettings { | |
15 public: | |
16 // File path is the base of the extension settings directory. | |
17 // The databases will be at base_path/extension_id. | |
18 explicit ExtensionSettings(const FilePath& base_path); | |
19 ~ExtensionSettings(); | |
20 | |
21 // Callback for the GetStorage() methods. The callback will always be Run() | |
22 // from a PostMessage to the UI thread, even if the storage area is cached. | |
23 class Callback { | |
24 public: | |
25 virtual ~Callback() {} | |
26 | |
27 // Called when the storage area is available. Ownership of the object | |
28 // remains with the ExtensionSettings object. | |
29 virtual void Run(ExtensionSettingsStorage* storage) = 0; | |
30 }; | |
31 | |
32 // Gets the storage area for a given extension. | |
33 // By default this will be of type LEVELDB|CACHED, but on failure to create | |
34 // a leveldb instance will fall back to NOOP|CACHED. | |
Mihai Parparita -not on Chrome
2011/06/21 23:40:11
I'm not sure that the fallback behavior is a great
not at google - send to devlin
2011/06/22 09:40:38
What should the failure behaviour be then? Just e
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35 // Callback objects will be deleted when used. | |
36 void GetStorage(const std::string& extension_id, Callback* callback); | |
37 | |
38 // Gets a storage area for a given extension, with a specific type, either | |
39 // NOOP, LEVELDB, NOOP|CACHED, or LEVELDB|CACHED. | |
40 // Use this for testing; if the given type fails to be created (e.g. if | |
41 // leveldb creation fails) then a DCHECK will fail. | |
42 // Callback objects will be deleted when used. | |
43 void GetStorageForTesting(int type, const std::string& extension_id, | |
44 Callback* callback); | |
45 | |
46 private: | |
Mihai Parparita -not on Chrome
2011/06/21 23:40:11
Should add DISALLOW_COPY_AND_ASSIGN.
not at google - send to devlin
2011/06/22 09:40:38
Done.
| |
47 // Attempts to get and callback with an existing storage area. Returns | |
48 // whether storage existed and the callback run. | |
49 bool GetExistingStorage(const std::string& extension_id, Callback* callback); | |
50 | |
51 const FilePath base_path_; | |
52 std::map<std::string, ExtensionSettingsStorage*> storage_objs_; | |
53 }; | |
54 | |
55 #endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_SETTINGS_H_ | |
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