1 | // |
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2 | // SimpleFileChannel.h |
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3 | // |
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4 | // $Id: //poco/1.3/Foundation/include/Poco/SimpleFileChannel.h#1 $ |
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5 | // |
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6 | // Library: Foundation |
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7 | // Package: Logging |
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8 | // Module: SimpleFileChannel |
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9 | // |
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10 | // Definition of the SimpleFileChannel class. |
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11 | // |
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12 | // Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH. |
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13 | // and Contributors. |
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14 | // |
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15 | // Permission is hereby granted, free of charge, to any person or organization |
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16 | // obtaining a copy of the software and accompanying documentation covered by |
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17 | // this license (the "Software") to use, reproduce, display, distribute, |
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18 | // execute, and transmit the Software, and to prepare derivative works of the |
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19 | // Software, and to permit third-parties to whom the Software is furnished to |
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20 | // do so, all subject to the following: |
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21 | // |
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22 | // The copyright notices in the Software and this entire statement, including |
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23 | // the above license grant, this restriction and the following disclaimer, |
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24 | // must be included in all copies of the Software, in whole or in part, and |
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25 | // all derivative works of the Software, unless such copies or derivative |
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26 | // works are solely in the form of machine-executable object code generated by |
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27 | // a source language processor. |
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28 | // |
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29 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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30 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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31 | // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT |
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32 | // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE |
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33 | // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, |
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34 | // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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35 | // DEALINGS IN THE SOFTWARE. |
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36 | // |
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37 | |
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38 | |
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39 | #ifndef Foundation_SimpleFileChannel_INCLUDED |
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40 | #define Foundation_SimpleFileChannel_INCLUDED |
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41 | |
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42 | |
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43 | #include "Poco/Foundation.h" |
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44 | #include "Poco/Channel.h" |
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45 | #include "Poco/Timestamp.h" |
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46 | #include "Poco/Mutex.h" |
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47 | |
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48 | |
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49 | namespace Poco { |
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50 | |
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51 | |
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52 | class LogFile; |
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53 | |
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54 | |
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55 | class Foundation_API SimpleFileChannel: public Channel |
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56 | /// A Channel that writes to a file. This class only |
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57 | /// supports simple log file rotation. |
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58 | /// |
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59 | /// For more features, see the FileChannel class. |
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60 | /// |
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61 | /// Only the message's text is written, followed |
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62 | /// by a newline. |
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63 | /// |
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64 | /// Chain this channel to a FormattingChannel with an |
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65 | /// appropriate Formatter to control what is in the text. |
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66 | /// |
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67 | /// Log file rotation based on log file size is supported. |
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68 | /// |
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69 | /// If rotation is enabled, the SimpleFileChannel will |
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70 | /// alternate between two log files. If the size of |
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71 | /// the primary log file exceeds a specified limit, |
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72 | /// the secondary log file will be used, and vice |
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73 | /// versa. |
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74 | /// |
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75 | /// Log rotation is configured with the "rotation" |
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76 | /// property, which supports the following values: |
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77 | /// * never: no log rotation |
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78 | /// * <n>: the file is rotated when its size exceeds |
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79 | /// <n> bytes. |
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80 | /// * <n> K: the file is rotated when its size exceeds |
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81 | /// <n> Kilobytes. |
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82 | /// * <n> M: the file is rotated when its size exceeds |
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83 | /// <n> Megabytes. |
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84 | /// |
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85 | /// The path of the (primary) log file can be specified with |
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86 | /// the "path" property. Optionally, the path of the secondary |
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87 | /// log file can be specified with the "secondaryPath" property. |
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88 | /// |
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89 | /// If no secondary path is specified, the secondary path will |
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90 | /// default to <primaryPath>.1. |
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91 | { |
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92 | public: |
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93 | SimpleFileChannel(); |
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94 | /// Creates the FileChannel. |
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95 | |
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96 | SimpleFileChannel(const std::string& path); |
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97 | /// Creates the FileChannel for a file with the given path. |
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98 | |
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99 | void open(); |
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100 | /// Opens the FileChannel and creates the log file if necessary. |
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101 | |
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102 | void close(); |
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103 | /// Closes the FileChannel. |
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104 | |
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105 | void log(const Message& msg); |
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106 | /// Logs the given message to the file. |
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107 | |
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108 | void setProperty(const std::string& name, const std::string& value); |
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109 | /// Sets the property with the given name. |
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110 | /// |
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111 | /// The following properties are supported: |
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112 | /// * path: The primary log file's path. |
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113 | /// * secondaryPath: The secondary log file's path. |
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114 | /// * rotation: The log file's rotation mode. See the |
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115 | /// SimpleFileChannel class for details. |
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116 | |
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117 | std::string getProperty(const std::string& name) const; |
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118 | /// Returns the value of the property with the given name. |
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119 | /// See setProperty() for a description of the supported |
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120 | /// properties. |
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121 | |
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122 | Timestamp creationDate() const; |
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123 | /// Returns the log file's creation date. |
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124 | |
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125 | UInt64 size() const; |
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126 | /// Returns the log file's current size in bytes. |
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127 | |
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128 | const std::string& path() const; |
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129 | /// Returns the log file's primary path. |
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130 | |
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131 | const std::string& secondaryPath() const; |
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132 | /// Returns the log file's secondary path. |
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133 | |
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134 | static const std::string PROP_PATH; |
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135 | static const std::string PROP_SECONDARYPATH; |
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136 | static const std::string PROP_ROTATION; |
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137 | |
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138 | protected: |
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139 | ~SimpleFileChannel(); |
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140 | void setRotation(const std::string& rotation); |
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141 | void rotate(); |
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142 | |
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143 | private: |
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144 | std::string _path; |
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145 | std::string _secondaryPath; |
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146 | std::string _rotation; |
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147 | UInt64 _limit; |
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148 | LogFile* _pFile; |
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149 | FastMutex _mutex; |
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150 | }; |
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151 | |
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152 | |
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153 | } // namespace Poco |
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154 | |
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155 | |
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156 | #endif // Foundation_SimpleFileChannel_INCLUDED |
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