1 | // |
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2 | // PurgeStrategy.h |
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3 | // |
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4 | // $Id: //poco/1.3/Foundation/include/Poco/PurgeStrategy.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: FileChannel |
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9 | // |
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10 | // Definition of the PurgeStrategy class. |
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11 | // |
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12 | // Copyright (c) 2004-2006, 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_PurgeStrategy_INCLUDED |
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40 | #define Foundation_PurgeStrategy_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/File.h" |
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45 | #include "Poco/Timespan.h" |
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46 | #include <vector> |
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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 Foundation_API PurgeStrategy |
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53 | /// The PurgeStrategy is used by FileChannel |
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54 | /// to purge archived log files. |
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55 | { |
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56 | public: |
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57 | PurgeStrategy(); |
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58 | virtual ~PurgeStrategy(); |
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59 | |
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60 | virtual void purge(const std::string& path) = 0; |
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61 | /// Purges archived log files. The path to the |
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62 | /// current "hot" log file is given. |
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63 | /// To find archived log files, look for files |
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64 | /// with a name consisting of the given path |
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65 | /// plus any suffix (e.g., .1, .20050929081500, .1.gz). |
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66 | /// A list of archived files can be obtained by calling |
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67 | /// the list() method. |
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68 | |
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69 | protected: |
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70 | void list(const std::string& path, std::vector<File>& files); |
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71 | /// Fills the given vector with a list of archived log |
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72 | /// files. The path of the current "hot" log file is |
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73 | /// given in path. |
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74 | /// |
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75 | /// All files with the same name as the one given in path, |
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76 | /// plus some suffix (e.g., .1, .20050929081500, .1.gz) are |
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77 | /// considered archived files. |
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78 | |
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79 | private: |
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80 | PurgeStrategy(const PurgeStrategy&); |
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81 | PurgeStrategy& operator = (const PurgeStrategy&); |
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82 | }; |
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83 | |
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84 | |
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85 | class Foundation_API PurgeByAgeStrategy: public PurgeStrategy |
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86 | /// This purge strategy purges all files that have |
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87 | /// exceeded a given age (given in seconds). |
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88 | { |
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89 | public: |
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90 | PurgeByAgeStrategy(const Timespan& age); |
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91 | ~PurgeByAgeStrategy(); |
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92 | |
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93 | void purge(const std::string& path); |
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94 | |
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95 | private: |
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96 | Timespan _age; |
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97 | }; |
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98 | |
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99 | |
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100 | class Foundation_API PurgeByCountStrategy: public PurgeStrategy |
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101 | /// This purge strategy ensures that a maximum number |
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102 | /// of archived files is not exceeded. Files are deleted |
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103 | /// based on their age, with oldest files deleted first. |
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104 | { |
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105 | public: |
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106 | PurgeByCountStrategy(int count); |
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107 | ~PurgeByCountStrategy(); |
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108 | |
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109 | void purge(const std::string& path); |
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110 | |
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111 | private: |
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112 | int _count; |
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113 | }; |
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114 | |
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115 | |
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116 | } // namespace Poco |
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117 | |
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118 | |
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119 | #endif // Foundation_PurgeStrategy_INCLUDED |
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