prosody
29a340777d7b
util/logger.lua

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util/logger.lua @ 3668:29a340777d7b

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author Waqas Hussain <waqas20@gmail.com>
date Sun, 28 Nov 2010 15:02:56 +0500
parent 3556:d00fc909296e
child 4627:b046cafc81a8
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9 local pcall = pcall;
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10
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11 local find = string.find;
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12 local ipairs, pairs, setmetatable = ipairs, pairs, setmetatable;
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13
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14 module "logger"
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15
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16 local name_sinks, level_sinks = {}, {};
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17 local name_patterns = {};
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18
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19 local make_logger;
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20
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21 function init(name)
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22 local log_debug = make_logger(name, "debug");
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23 local log_info = make_logger(name, "info");
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24 local log_warn = make_logger(name, "warn");
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25 local log_error = make_logger(name, "error");
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26
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27 --name = nil; -- While this line is not commented, will automatically fill in file/line number info
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28 local namelen = #name;
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29 return function (level, message, ...)
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30 if level == "debug" then
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31 return log_debug(message, ...);
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32 elseif level == "info" then
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33 return log_info(message, ...);
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34 elseif level == "warn" then
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35 return log_warn(message, ...);
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36 elseif level == "error" then
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37 return log_error(message, ...);
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38 end
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39 end
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40 end
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41
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42 function make_logger(source_name, level)
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43 local level_handlers = level_sinks[level];
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44 if not level_handlers then
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45 level_handlers = {};
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46 level_sinks[level] = level_handlers;
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47 end
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48
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49 local source_handlers = name_sinks[source_name];
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50
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51 local logger = function (message, ...)
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52 if source_handlers then
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53 for i = 1,#source_handlers do
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54 if source_handlers[i](source_name, level, message, ...) == false then
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55 return;
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56 end
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57 end
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58 end
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59
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60 for i = 1,#level_handlers do
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61 level_handlers[i](source_name, level, message, ...);
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62 end
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63 end
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64
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65 return logger;
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66 end
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67
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68 function reset()
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69 for k in pairs(name_sinks) do name_sinks[k] = nil; end
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70 for level, handler_list in pairs(level_sinks) do
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71 -- Clear all handlers for this level
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72 for i = 1, #handler_list do
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73 handler_list[i] = nil;
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74 end
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75 end
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76 for k in pairs(name_patterns) do name_patterns[k] = nil; end
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77 end
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78
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79 function add_level_sink(level, sink_function)
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80 if not level_sinks[level] then
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81 level_sinks[level] = { sink_function };
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82 else
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83 level_sinks[level][#level_sinks[level] + 1 ] = sink_function;
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84 end
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85 end
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86
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87 function add_name_sink(name, sink_function, exclusive)
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88 if not name_sinks[name] then
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89 name_sinks[name] = { sink_function };
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90 else
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91 name_sinks[name][#name_sinks[name] + 1] = sink_function;
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92 end
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93 end
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94
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95 function add_name_pattern_sink(name_pattern, sink_function, exclusive)
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96 if not name_patterns[name_pattern] then
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97 name_patterns[name_pattern] = { sink_function };
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98 else
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99 name_patterns[name_pattern][#name_patterns[name_pattern] + 1] = sink_function;
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100 end
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101 end
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102
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103 _M.new = make_logger;
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104
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105 return _M;