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Side by Side Diff: content/browser/dom_storage/dom_storage_area.h

Issue 22297005: Move webkit/{browser,common}/dom_storage into content/ (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 7 years, 4 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef WEBKIT_BROWSER_DOM_STORAGE_DOM_STORAGE_AREA_H_ 5 #ifndef CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_AREA_H_
6 #define WEBKIT_BROWSER_DOM_STORAGE_DOM_STORAGE_AREA_H_ 6 #define CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_AREA_H_
7 7
8 #include "base/files/file_path.h" 8 #include "base/files/file_path.h"
9 #include "base/gtest_prod_util.h" 9 #include "base/gtest_prod_util.h"
10 #include "base/memory/ref_counted.h" 10 #include "base/memory/ref_counted.h"
11 #include "base/memory/scoped_ptr.h" 11 #include "base/memory/scoped_ptr.h"
12 #include "base/strings/nullable_string16.h" 12 #include "base/strings/nullable_string16.h"
13 #include "base/strings/string16.h" 13 #include "base/strings/string16.h"
14 #include "content/common/content_export.h"
15 #include "content/common/dom_storage/dom_storage_types.h"
14 #include "url/gurl.h" 16 #include "url/gurl.h"
15 #include "webkit/browser/webkit_storage_browser_export.h"
16 #include "webkit/common/dom_storage/dom_storage_types.h"
17 17
18 namespace dom_storage { 18 namespace content {
19 19
20 class DomStorageDatabaseAdapter; 20 class DOMStorageDatabaseAdapter;
21 class DomStorageMap; 21 class DOMStorageMap;
22 class DomStorageTaskRunner; 22 class DOMStorageTaskRunner;
23 class SessionStorageDatabase; 23 class SessionStorageDatabase;
24 24
25 // Container for a per-origin Map of key/value pairs potentially 25 // Container for a per-origin Map of key/value pairs potentially
26 // backed by storage on disk and lazily commits changes to disk. 26 // backed by storage on disk and lazily commits changes to disk.
27 // See class comments for DomStorageContext for a larger overview. 27 // See class comments for DOMStorageContextImpl for a larger overview.
28 class WEBKIT_STORAGE_BROWSER_EXPORT DomStorageArea 28 class CONTENT_EXPORT DOMStorageArea
29 : public base::RefCountedThreadSafe<DomStorageArea> { 29 : public base::RefCountedThreadSafe<DOMStorageArea> {
30 30
31 public: 31 public:
32 static const base::FilePath::CharType kDatabaseFileExtension[]; 32 static const base::FilePath::CharType kDatabaseFileExtension[];
33 static base::FilePath DatabaseFileNameFromOrigin(const GURL& origin); 33 static base::FilePath DatabaseFileNameFromOrigin(const GURL& origin);
34 static GURL OriginFromDatabaseFileName(const base::FilePath& file_name); 34 static GURL OriginFromDatabaseFileName(const base::FilePath& file_name);
35 35
36 // Local storage. Backed on disk if directory is nonempty. 36 // Local storage. Backed on disk if directory is nonempty.
37 DomStorageArea(const GURL& origin, 37 DOMStorageArea(const GURL& origin,
38 const base::FilePath& directory, 38 const base::FilePath& directory,
39 DomStorageTaskRunner* task_runner); 39 DOMStorageTaskRunner* task_runner);
40 40
41 // Session storage. Backed on disk if |session_storage_backing| is not NULL. 41 // Session storage. Backed on disk if |session_storage_backing| is not NULL.
42 DomStorageArea(int64 namespace_id, 42 DOMStorageArea(int64 namespace_id,
43 const std::string& persistent_namespace_id, 43 const std::string& persistent_namespace_id,
44 const GURL& origin, 44 const GURL& origin,
45 SessionStorageDatabase* session_storage_backing, 45 SessionStorageDatabase* session_storage_backing,
46 DomStorageTaskRunner* task_runner); 46 DOMStorageTaskRunner* task_runner);
47 47
48 const GURL& origin() const { return origin_; } 48 const GURL& origin() const { return origin_; }
49 int64 namespace_id() const { return namespace_id_; } 49 int64 namespace_id() const { return namespace_id_; }
50 50
51 // Writes a copy of the current set of values in the area to the |map|. 51 // Writes a copy of the current set of values in the area to the |map|.
52 void ExtractValues(ValuesMap* map); 52 void ExtractValues(DOMStorageValuesMap* map);
53 53
54 unsigned Length(); 54 unsigned Length();
55 base::NullableString16 Key(unsigned index); 55 base::NullableString16 Key(unsigned index);
56 base::NullableString16 GetItem(const base::string16& key); 56 base::NullableString16 GetItem(const base::string16& key);
57 bool SetItem(const base::string16& key, const base::string16& value, 57 bool SetItem(const base::string16& key, const base::string16& value,
58 base::NullableString16* old_value); 58 base::NullableString16* old_value);
59 bool RemoveItem(const base::string16& key, base::string16* old_value); 59 bool RemoveItem(const base::string16& key, base::string16* old_value);
60 bool Clear(); 60 bool Clear();
61 void FastClear(); 61 void FastClear();
62 62
63 DomStorageArea* ShallowCopy( 63 DOMStorageArea* ShallowCopy(
64 int64 destination_namespace_id, 64 int64 destination_namespace_id,
65 const std::string& destination_persistent_namespace_id); 65 const std::string& destination_persistent_namespace_id);
66 66
67 bool HasUncommittedChanges() const; 67 bool HasUncommittedChanges() const;
68 68
69 // Similar to Clear() but more optimized for just deleting 69 // Similar to Clear() but more optimized for just deleting
70 // without raising events. 70 // without raising events.
71 void DeleteOrigin(); 71 void DeleteOrigin();
72 72
73 // Frees up memory when possible. Typically, this method returns 73 // Frees up memory when possible. Typically, this method returns
74 // the object to its just constructed state, however if uncommitted 74 // the object to its just constructed state, however if uncommitted
75 // changes are pending, it does nothing. 75 // changes are pending, it does nothing.
76 void PurgeMemory(); 76 void PurgeMemory();
77 77
78 // Schedules the commit of any unsaved changes and enters a 78 // Schedules the commit of any unsaved changes and enters a
79 // shutdown state such that the value getters and setters will 79 // shutdown state such that the value getters and setters will
80 // no longer do anything. 80 // no longer do anything.
81 void Shutdown(); 81 void Shutdown();
82 82
83 // Returns true if the data is loaded in memory. 83 // Returns true if the data is loaded in memory.
84 bool IsLoadedInMemory() const { return is_initial_import_done_; } 84 bool IsLoadedInMemory() const { return is_initial_import_done_; }
85 85
86 private: 86 private:
87 friend class DomStorageAreaTest; 87 friend class DOMStorageAreaTest;
88 FRIEND_TEST_ALL_PREFIXES(DomStorageAreaTest, DomStorageAreaBasics); 88 FRIEND_TEST_ALL_PREFIXES(DOMStorageAreaTest, DOMStorageAreaBasics);
89 FRIEND_TEST_ALL_PREFIXES(DomStorageAreaTest, BackingDatabaseOpened); 89 FRIEND_TEST_ALL_PREFIXES(DOMStorageAreaTest, BackingDatabaseOpened);
90 FRIEND_TEST_ALL_PREFIXES(DomStorageAreaTest, TestDatabaseFilePath); 90 FRIEND_TEST_ALL_PREFIXES(DOMStorageAreaTest, TestDatabaseFilePath);
91 FRIEND_TEST_ALL_PREFIXES(DomStorageAreaTest, CommitTasks); 91 FRIEND_TEST_ALL_PREFIXES(DOMStorageAreaTest, CommitTasks);
92 FRIEND_TEST_ALL_PREFIXES(DomStorageAreaTest, CommitChangesAtShutdown); 92 FRIEND_TEST_ALL_PREFIXES(DOMStorageAreaTest, CommitChangesAtShutdown);
93 FRIEND_TEST_ALL_PREFIXES(DomStorageAreaTest, DeleteOrigin); 93 FRIEND_TEST_ALL_PREFIXES(DOMStorageAreaTest, DeleteOrigin);
94 FRIEND_TEST_ALL_PREFIXES(DomStorageAreaTest, PurgeMemory); 94 FRIEND_TEST_ALL_PREFIXES(DOMStorageAreaTest, PurgeMemory);
95 FRIEND_TEST_ALL_PREFIXES(DomStorageContextTest, PersistentIds); 95 FRIEND_TEST_ALL_PREFIXES(DOMStorageContextImplTest, PersistentIds);
96 friend class base::RefCountedThreadSafe<DomStorageArea>; 96 friend class base::RefCountedThreadSafe<DOMStorageArea>;
97 97
98 struct CommitBatch { 98 struct CommitBatch {
99 bool clear_all_first; 99 bool clear_all_first;
100 ValuesMap changed_values; 100 DOMStorageValuesMap changed_values;
101 CommitBatch(); 101 CommitBatch();
102 ~CommitBatch(); 102 ~CommitBatch();
103 }; 103 };
104 104
105 ~DomStorageArea(); 105 ~DOMStorageArea();
106 106
107 // If we haven't done so already and this is a local storage area, 107 // If we haven't done so already and this is a local storage area,
108 // will attempt to read any values for this origin currently 108 // will attempt to read any values for this origin currently
109 // stored on disk. 109 // stored on disk.
110 void InitialImportIfNeeded(); 110 void InitialImportIfNeeded();
111 111
112 // Post tasks to defer writing a batch of changed values to 112 // Post tasks to defer writing a batch of changed values to
113 // disk on the commit sequence, and to call back on the primary 113 // disk on the commit sequence, and to call back on the primary
114 // task sequence when complete. 114 // task sequence when complete.
115 CommitBatch* CreateCommitBatchIfNeeded(); 115 CommitBatch* CreateCommitBatchIfNeeded();
116 void OnCommitTimer(); 116 void OnCommitTimer();
117 void CommitChanges(const CommitBatch* commit_batch); 117 void CommitChanges(const CommitBatch* commit_batch);
118 void OnCommitComplete(); 118 void OnCommitComplete();
119 119
120 void ShutdownInCommitSequence(); 120 void ShutdownInCommitSequence();
121 121
122 int64 namespace_id_; 122 int64 namespace_id_;
123 std::string persistent_namespace_id_; 123 std::string persistent_namespace_id_;
124 GURL origin_; 124 GURL origin_;
125 base::FilePath directory_; 125 base::FilePath directory_;
126 scoped_refptr<DomStorageTaskRunner> task_runner_; 126 scoped_refptr<DOMStorageTaskRunner> task_runner_;
127 scoped_refptr<DomStorageMap> map_; 127 scoped_refptr<DOMStorageMap> map_;
128 scoped_ptr<DomStorageDatabaseAdapter> backing_; 128 scoped_ptr<DOMStorageDatabaseAdapter> backing_;
129 scoped_refptr<SessionStorageDatabase> session_storage_backing_; 129 scoped_refptr<SessionStorageDatabase> session_storage_backing_;
130 bool is_initial_import_done_; 130 bool is_initial_import_done_;
131 bool is_shutdown_; 131 bool is_shutdown_;
132 scoped_ptr<CommitBatch> commit_batch_; 132 scoped_ptr<CommitBatch> commit_batch_;
133 int commit_batches_in_flight_; 133 int commit_batches_in_flight_;
134 }; 134 };
135 135
136 } // namespace dom_storage 136 } // namespace content
137 137
138 #endif // WEBKIT_BROWSER_DOM_STORAGE_DOM_STORAGE_AREA_H_ 138 #endif // CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_AREA_H_
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