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1 /* | 1 /* |
2 * Copyright 2015 The WebRTC Project Authors. All rights reserved. | 2 * Copyright 2015 The WebRTC Project Authors. All rights reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
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75 | 75 |
76 void SetMaxFileSize(size_t size) { max_file_size_ = size; } | 76 void SetMaxFileSize(size_t size) { max_file_size_ = size; } |
77 | 77 |
78 size_t GetRotationIndex() const { return rotation_index_; } | 78 size_t GetRotationIndex() const { return rotation_index_; } |
79 | 79 |
80 void SetRotationIndex(size_t index) { rotation_index_ = index; } | 80 void SetRotationIndex(size_t index) { rotation_index_ = index; } |
81 | 81 |
82 virtual void OnRotation() {} | 82 virtual void OnRotation() {} |
83 | 83 |
84 private: | 84 private: |
85 enum Mode { kRead, kWrite }; | |
86 | |
87 FileRotatingStream(const std::string& dir_path, | |
88 const std::string& file_prefix, | |
89 size_t max_file_size, | |
90 size_t num_files, | |
91 Mode mode); | |
92 | |
93 bool OpenCurrentFile(); | 85 bool OpenCurrentFile(); |
94 void CloseCurrentFile(); | 86 void CloseCurrentFile(); |
95 | 87 |
96 // Rotates the files by creating a new current file, renaming the | 88 // Rotates the files by creating a new current file, renaming the |
97 // existing files, and deleting the oldest one. e.g. | 89 // existing files, and deleting the oldest one. e.g. |
98 // file_0 -> file_1 | 90 // file_0 -> file_1 |
99 // file_1 -> file_2 | 91 // file_1 -> file_2 |
100 // file_2 -> delete | 92 // file_2 -> delete |
101 // create new file_0 | 93 // create new file_0 |
102 void RotateFiles(); | 94 void RotateFiles(); |
103 | 95 |
104 // Returns a list of file names in the directory beginning with the prefix. | 96 // Returns a list of file names in the directory beginning with the prefix. |
105 std::vector<std::string> GetFilesWithPrefix() const; | 97 std::vector<std::string> GetFilesWithPrefix() const; |
106 // Private version of GetFilePath. | 98 // Private version of GetFilePath. |
107 std::string GetFilePath(size_t index, size_t num_files) const; | 99 std::string GetFilePath(size_t index, size_t num_files) const; |
108 | 100 |
109 const std::string dir_path_; | 101 const std::string dir_path_; |
110 const std::string file_prefix_; | 102 const std::string file_prefix_; |
111 const Mode mode_; | |
112 | 103 |
113 // FileStream is used to write to the current file. | 104 // FileStream is used to write to the current file. |
114 std::unique_ptr<FileStream> file_stream_; | 105 std::unique_ptr<FileStream> file_stream_; |
115 // Convenience storage for file names so we don't generate them over and over. | 106 // Convenience storage for file names so we don't generate them over and over. |
116 std::vector<std::string> file_names_; | 107 std::vector<std::string> file_names_; |
117 size_t max_file_size_; | 108 size_t max_file_size_; |
118 size_t current_file_index_; | 109 size_t current_file_index_; |
119 // The rotation index indicates the index of the file that will be | 110 // The rotation index indicates the index of the file that will be |
120 // deleted first on rotation. Indices lower than this index will be rotated. | 111 // deleted first on rotation. Indices lower than this index will be rotated. |
121 size_t rotation_index_; | 112 size_t rotation_index_; |
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136 // | 127 // |
137 // This implementation simply writes to a single file until | 128 // This implementation simply writes to a single file until |
138 // |max_total_log_size| / 2 bytes are written to it, and subsequently writes to | 129 // |max_total_log_size| / 2 bytes are written to it, and subsequently writes to |
139 // a set of rotating files. We do this by inheriting FileRotatingStream and | 130 // a set of rotating files. We do this by inheriting FileRotatingStream and |
140 // setting the appropriate internal variables so that we don't delete the last | 131 // setting the appropriate internal variables so that we don't delete the last |
141 // (earliest) file on rotate, and that that file's size is bigger. | 132 // (earliest) file on rotate, and that that file's size is bigger. |
142 // | 133 // |
143 // Open() must be called before using this stream. | 134 // Open() must be called before using this stream. |
144 class CallSessionFileRotatingStream : public FileRotatingStream { | 135 class CallSessionFileRotatingStream : public FileRotatingStream { |
145 public: | 136 public: |
146 // Use this constructor for reading a directory previously written to with | |
147 // this stream. | |
148 explicit CallSessionFileRotatingStream(const std::string& dir_path); | |
149 // Use this constructor for writing to a directory. Files in the directory | 137 // Use this constructor for writing to a directory. Files in the directory |
150 // matching what's used by the stream will be deleted. |max_total_log_size| | 138 // matching what's used by the stream will be deleted. |max_total_log_size| |
151 // must be at least 4. | 139 // must be at least 4. |
152 CallSessionFileRotatingStream(const std::string& dir_path, | 140 CallSessionFileRotatingStream(const std::string& dir_path, |
153 size_t max_total_log_size); | 141 size_t max_total_log_size); |
154 ~CallSessionFileRotatingStream() override {} | 142 ~CallSessionFileRotatingStream() override {} |
155 | 143 |
156 protected: | 144 protected: |
157 void OnRotation() override; | 145 void OnRotation() override; |
158 | 146 |
159 private: | 147 private: |
160 static size_t GetRotatingLogSize(size_t max_total_log_size); | 148 static size_t GetRotatingLogSize(size_t max_total_log_size); |
161 static size_t GetNumRotatingLogFiles(size_t max_total_log_size); | 149 static size_t GetNumRotatingLogFiles(size_t max_total_log_size); |
162 static const char* kLogPrefix; | 150 static const char* kLogPrefix; |
163 static const size_t kRotatingLogFileDefaultSize; | 151 static const size_t kRotatingLogFileDefaultSize; |
164 | 152 |
165 const size_t max_total_log_size_; | 153 const size_t max_total_log_size_; |
166 size_t num_rotations_; | 154 size_t num_rotations_; |
167 | 155 |
168 RTC_DISALLOW_COPY_AND_ASSIGN(CallSessionFileRotatingStream); | 156 RTC_DISALLOW_COPY_AND_ASSIGN(CallSessionFileRotatingStream); |
169 }; | 157 }; |
170 | 158 |
171 } // namespace rtc | 159 } // namespace rtc |
172 | 160 |
173 #endif // WEBRTC_BASE_FILEROTATINGSTREAM_H_ | 161 #endif // WEBRTC_BASE_FILEROTATINGSTREAM_H_ |
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