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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
// 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.
#include "chrome/browser/extensions/extension_settings.h"
#include "base/bind.h"
#include "base/json/json_reader.h"
#include "base/json/json_writer.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "content/browser/browser_thread.h"
#include "chrome/browser/extensions/extension_settings_leveldb_storage.h"
#include "chrome/browser/extensions/extension_settings_noop_storage.h"
#include "chrome/browser/extensions/extension_settings_storage_cache.h"
#include "third_party/leveldatabase/src/include/leveldb/iterator.h"
#include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
ExtensionSettings::ExtensionSettings(const FilePath& base_path)
: base_path_(base_path) {
}
ExtensionSettings::~ExtensionSettings() {
std::map<std::string, ExtensionSettingsStorage*>::iterator it;
for (it = storage_objs_.begin(); it != storage_objs_.end(); ++it) {
it->second->DeleteSoon();
}
}
void ExtensionSettings::GetStorage(
const std::string& extension_id,
const Callback& callback) {
if (!GetExistingStorage(extension_id, callback)) {
StartCreationOfStorage(
extension_id,
ExtensionSettingsStorage::LEVELDB,
ExtensionSettingsStorage::NOOP,
true,
callback);
}
}
void ExtensionSettings::GetStorageForTesting(
ExtensionSettingsStorage::Type type,
bool cached,
const std::string& extension_id,
const Callback& callback) {
if (!GetExistingStorage(extension_id, callback)) {
StartCreationOfStorage(extension_id, type, type, cached, callback);
}
}
bool ExtensionSettings::GetExistingStorage(
const std::string& extension_id, const Callback& callback) {
std::map<std::string, ExtensionSettingsStorage*>::iterator existing =
storage_objs_.find(extension_id);
if (existing == storage_objs_.end()) {
// No existing storage.
return false;
}
// Existing storage. Reply with that.
ExtensionSettingsStorage* storage = existing->second;
DCHECK(storage != NULL);
MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(
&ExtensionSettings::RunWithStorage,
this,
new Callback(callback),
storage));
return true;
}
void ExtensionSettings::RunWithStorage(
Callback* callback, ExtensionSettingsStorage* storage) {
callback->Run(storage);
delete callback;
}
void ExtensionSettings::StartCreationOfStorage(
const std::string& extension_id,
ExtensionSettingsStorage::Type type,
ExtensionSettingsStorage::Type fallback_type,
bool cached,
const Callback& callback) {
BrowserThread::PostTask(
BrowserThread::FILE,
FROM_HERE,
base::Bind(
&ExtensionSettings::CreateStorageOnFileThread,
this,
extension_id,
type,
fallback_type,
cached,
callback));
}
void ExtensionSettings::CreateStorageOnFileThread(
const std::string& extension_id,
ExtensionSettingsStorage::Type type,
ExtensionSettingsStorage::Type fallback_type,
bool cached,
const Callback& callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
ExtensionSettingsStorage* storage = CreateStorage(extension_id, type, cached);
if (storage == NULL && fallback_type != type) {
storage = CreateStorage(extension_id, fallback_type, cached);
}
DCHECK(storage != NULL);
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(
&ExtensionSettings::EndCreationOfStorage,
this,
extension_id,
storage,
callback));
}
ExtensionSettingsStorage* ExtensionSettings::CreateStorage(
const std::string& extension_id,
ExtensionSettingsStorage::Type type,
bool cached) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
ExtensionSettingsStorage* storage = NULL;
switch (type) {
case ExtensionSettingsStorage::NOOP:
storage = new ExtensionSettingsNoopStorage();
break;
case ExtensionSettingsStorage::LEVELDB:
storage = ExtensionSettingsLeveldbStorage::Create(
base_path_, extension_id);
break;
default:
NOTREACHED();
}
if (storage != NULL && cached) {
storage = new ExtensionSettingsStorageCache(storage);
}
return storage;
}
void ExtensionSettings::EndCreationOfStorage(
const std::string& extension_id,
ExtensionSettingsStorage* storage,
const Callback& callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
// Cache the result now. To avoid a race condition, check again to see
// whether a storage has been created already; if so, use that one.
std::map<std::string, ExtensionSettingsStorage*>::iterator existing =
storage_objs_.find(extension_id);
if (existing == storage_objs_.end()) {
storage_objs_[extension_id] = storage;
} else {
storage->DeleteSoon();
storage = existing->second;
DCHECK(storage != NULL);
}
callback.Run(storage);
}
|
