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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_FILEAPI_SYNCABLE_LOCAL_FILE_CHANGE_TRACKER_H_ | 5 #ifndef WEBKIT_FILEAPI_SYNCABLE_LOCAL_FILE_CHANGE_TRACKER_H_ |
6 #define WEBKIT_FILEAPI_SYNCABLE_LOCAL_FILE_CHANGE_TRACKER_H_ | 6 #define WEBKIT_FILEAPI_SYNCABLE_LOCAL_FILE_CHANGE_TRACKER_H_ |
7 | 7 |
8 #include <deque> | 8 #include <deque> |
9 #include <map> | 9 #include <map> |
10 #include <string> | 10 #include <string> |
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58 virtual void OnRemoveDirectory(const FileSystemURL& url) OVERRIDE; | 58 virtual void OnRemoveDirectory(const FileSystemURL& url) OVERRIDE; |
59 | 59 |
60 // Retrieves an array of |url| which have more than one pending changes. | 60 // Retrieves an array of |url| which have more than one pending changes. |
61 // If |max_urls| is non-zero (recommended in production code) this | 61 // If |max_urls| is non-zero (recommended in production code) this |
62 // returns URLs up to the number from the ones that have smallest | 62 // returns URLs up to the number from the ones that have smallest |
63 // change_seq numbers (i.e. older changes). | 63 // change_seq numbers (i.e. older changes). |
64 void GetNextChangedURLs(std::deque<FileSystemURL>* urls, int max_urls); | 64 void GetNextChangedURLs(std::deque<FileSystemURL>* urls, int max_urls); |
65 | 65 |
66 // Returns all changes recorded for the given |url|. | 66 // Returns all changes recorded for the given |url|. |
67 // This should be called after writing is disabled. | 67 // This should be called after writing is disabled. |
68 void GetChangesForURL(const FileSystemURL& url, FileChangeList* changes); | 68 void GetChangesForURL(const FileSystemURL& url, |
| 69 sync_file_system::FileChangeList* changes); |
69 | 70 |
70 // Clears the pending changes recorded in this tracker for |url|. | 71 // Clears the pending changes recorded in this tracker for |url|. |
71 void ClearChangesForURL(const FileSystemURL& url); | 72 void ClearChangesForURL(const FileSystemURL& url); |
72 | 73 |
73 // Called by FileSyncService at the startup time to restore last dirty changes | 74 // Called by FileSyncService at the startup time to restore last dirty changes |
74 // left after the last shutdown (if any). | 75 // left after the last shutdown (if any). |
75 SyncStatusCode Initialize(FileSystemContext* file_system_context); | 76 SyncStatusCode Initialize(FileSystemContext* file_system_context); |
76 | 77 |
77 // This method is (exceptionally) thread-safe. | 78 // This method is (exceptionally) thread-safe. |
78 int64 num_changes() const { | 79 int64 num_changes() const { |
79 base::AutoLock lock(num_changes_lock_); | 80 base::AutoLock lock(num_changes_lock_); |
80 return num_changes_; | 81 return num_changes_; |
81 } | 82 } |
82 | 83 |
83 void UpdateNumChanges(); | 84 void UpdateNumChanges(); |
84 | 85 |
85 private: | 86 private: |
86 class TrackerDB; | 87 class TrackerDB; |
87 friend class CannedSyncableFileSystem; | 88 friend class CannedSyncableFileSystem; |
88 friend class LocalFileChangeTrackerTest; | 89 friend class LocalFileChangeTrackerTest; |
89 friend class LocalFileSyncContext; | 90 friend class LocalFileSyncContext; |
90 friend class SyncableFileSystemTest; | 91 friend class SyncableFileSystemTest; |
91 | 92 |
92 struct ChangeInfo { | 93 struct ChangeInfo { |
93 ChangeInfo(); | 94 ChangeInfo(); |
94 ~ChangeInfo(); | 95 ~ChangeInfo(); |
95 FileChangeList change_list; | 96 sync_file_system::FileChangeList change_list; |
96 int64 change_seq; | 97 int64 change_seq; |
97 }; | 98 }; |
98 | 99 |
99 typedef std::map<FileSystemURL, ChangeInfo, FileSystemURL::Comparator> | 100 typedef std::map<FileSystemURL, ChangeInfo, FileSystemURL::Comparator> |
100 FileChangeMap; | 101 FileChangeMap; |
101 typedef std::map<int64, FileSystemURL> ChangeSeqMap; | 102 typedef std::map<int64, FileSystemURL> ChangeSeqMap; |
102 | 103 |
103 // This does mostly same as calling GetNextChangedURLs with max_url=0 | 104 // This does mostly same as calling GetNextChangedURLs with max_url=0 |
104 // except that it returns urls in set rather than in deque. | 105 // except that it returns urls in set rather than in deque. |
105 // Used only in testings. | 106 // Used only in testings. |
106 void GetAllChangedURLs(FileSystemURLSet* urls); | 107 void GetAllChangedURLs(FileSystemURLSet* urls); |
107 | 108 |
108 // Used only in testings. | 109 // Used only in testings. |
109 void DropAllChanges(); | 110 void DropAllChanges(); |
110 | 111 |
111 // Database related methods. | 112 // Database related methods. |
112 SyncStatusCode MarkDirtyOnDatabase(const FileSystemURL& url); | 113 SyncStatusCode MarkDirtyOnDatabase(const FileSystemURL& url); |
113 SyncStatusCode ClearDirtyOnDatabase(const FileSystemURL& url); | 114 SyncStatusCode ClearDirtyOnDatabase(const FileSystemURL& url); |
114 | 115 |
115 SyncStatusCode CollectLastDirtyChanges( | 116 SyncStatusCode CollectLastDirtyChanges( |
116 FileSystemContext* file_system_context); | 117 FileSystemContext* file_system_context); |
117 void RecordChange(const FileSystemURL& url, const FileChange& change); | 118 void RecordChange(const FileSystemURL& url, |
| 119 const sync_file_system::FileChange& change); |
118 | 120 |
119 bool initialized_; | 121 bool initialized_; |
120 | 122 |
121 scoped_refptr<base::SequencedTaskRunner> file_task_runner_; | 123 scoped_refptr<base::SequencedTaskRunner> file_task_runner_; |
122 | 124 |
123 FileChangeMap changes_; | 125 FileChangeMap changes_; |
124 ChangeSeqMap change_seqs_; | 126 ChangeSeqMap change_seqs_; |
125 | 127 |
126 scoped_ptr<TrackerDB> tracker_db_; | 128 scoped_ptr<TrackerDB> tracker_db_; |
127 | 129 |
128 // Change sequence number. Briefly gives a hint about the order of changes, | 130 // Change sequence number. Briefly gives a hint about the order of changes, |
129 // but they are updated when a new change comes on the same file (as | 131 // but they are updated when a new change comes on the same file (as |
130 // well as Drive's changestamps). | 132 // well as Drive's changestamps). |
131 int64 current_change_seq_; | 133 int64 current_change_seq_; |
132 | 134 |
133 // This can be accessed on any threads (with num_changes_lock_). | 135 // This can be accessed on any threads (with num_changes_lock_). |
134 int64 num_changes_; | 136 int64 num_changes_; |
135 mutable base::Lock num_changes_lock_; | 137 mutable base::Lock num_changes_lock_; |
136 | 138 |
137 DISALLOW_COPY_AND_ASSIGN(LocalFileChangeTracker); | 139 DISALLOW_COPY_AND_ASSIGN(LocalFileChangeTracker); |
138 }; | 140 }; |
139 | 141 |
140 } // namespace fileapi | 142 } // namespace fileapi |
141 | 143 |
142 #endif // WEBKIT_FILEAPI_SYNCABLE_LOCAL_FILE_CHANGE_TRACKER_H_ | 144 #endif // WEBKIT_FILEAPI_SYNCABLE_LOCAL_FILE_CHANGE_TRACKER_H_ |
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