prosody
bc139431830b
util/logger.lua

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util/logger.lua @ 3540:bc139431830b

Monster whitespace commit (beware the whitespace monster).
author Waqas Hussain <waqas20@gmail.com>
date Sat, 16 Oct 2010 23:00:42 +0500
parent 3455:67cdc0366d46
child 3554:1770f8aaf04a
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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 -- Weak-keyed so that loggers are collected
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20 local modify_hooks = setmetatable({}, { __mode = "k" });
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21
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22 local make_logger;
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23 local outfunction = nil;
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24
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25 function init(name)
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26 local log_debug = make_logger(name, "debug");
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27 local log_info = make_logger(name, "info");
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28 local log_warn = make_logger(name, "warn");
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29 local log_error = make_logger(name, "error");
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30
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31 --name = nil; -- While this line is not commented, will automatically fill in file/line number info
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32 local namelen = #name;
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33 return function (level, message, ...)
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34 if outfunction then return outfunction(name, level, message, ...); end
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35
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36 if level == "debug" then
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37 return log_debug(message, ...);
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38 elseif level == "info" then
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39 return log_info(message, ...);
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40 elseif level == "warn" then
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41 return log_warn(message, ...);
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42 elseif level == "error" then
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43 return log_error(message, ...);
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44 end
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45 end
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46 end
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47
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48 function make_logger(source_name, level)
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49 local level_handlers = level_sinks[level];
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50 if not level_handlers then
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51 level_handlers = {};
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52 level_sinks[level] = level_handlers;
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53 end
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54
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55 local source_handlers = name_sinks[source_name];
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56
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57 -- All your premature optimisation is belong to me!
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58 local num_level_handlers, num_source_handlers = #level_handlers, source_handlers and #source_handlers;
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59
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60 local logger = function (message, ...)
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61 if source_handlers then
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62 for i = 1,num_source_handlers do
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63 if source_handlers[i](source_name, level, message, ...) == false then
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64 return;
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65 end
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66 end
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67 end
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68
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69 for i = 1,num_level_handlers do
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70 level_handlers[i](source_name, level, message, ...);
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71 end
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72 end
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73
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74 -- To make sure our cached lengths stay in sync with reality
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75 modify_hooks[logger] = function () num_level_handlers, num_source_handlers = #level_handlers, source_handlers and #source_handlers; end;
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76
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77 return logger;
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78 end
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79
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80 function setwriter(f)
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81 local old_func = outfunction;
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82 if not f then outfunction = nil; return true, old_func; end
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83 local ok, ret = pcall(f, "logger", "info", "Switched logging output successfully");
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84 if ok then
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85 outfunction = f;
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86 ret = old_func;
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87 end
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88 return ok, ret;
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89 end
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90
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91 function reset()
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92 for k in pairs(name_sinks) do name_sinks[k] = nil; end
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93 for level, handler_list in pairs(level_sinks) do
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94 -- Clear all handlers for this level
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95 for i = 1, #handler_list do
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96 handler_list[i] = nil;
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97 end
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98 end
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99 for k in pairs(name_patterns) do name_patterns[k] = nil; end
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100
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101 for _, modify_hook in pairs(modify_hooks) do
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102 modify_hook();
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103 end
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104 end
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105
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106 function add_level_sink(level, sink_function)
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107 if not level_sinks[level] then
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108 level_sinks[level] = { sink_function };
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109 else
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110 level_sinks[level][#level_sinks[level] + 1 ] = sink_function;
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111 end
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112
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113 for _, modify_hook in pairs(modify_hooks) do
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114 modify_hook();
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115 end
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116 end
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117
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118 function add_name_sink(name, sink_function, exclusive)
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119 if not name_sinks[name] then
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120 name_sinks[name] = { sink_function };
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121 else
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122 name_sinks[name][#name_sinks[name] + 1] = sink_function;
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123 end
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124
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125 for _, modify_hook in pairs(modify_hooks) do
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126 modify_hook();
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127 end
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128 end
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129
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130 function add_name_pattern_sink(name_pattern, sink_function, exclusive)
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131 if not name_patterns[name_pattern] then
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132 name_patterns[name_pattern] = { sink_function };
9e31e9397cff util.logger: Revamped logger library, but backwards-compatible for users of logger.init()
Matthew Wild <mwild1@gmail.com>
parents: 977
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133 else
9e31e9397cff util.logger: Revamped logger library, but backwards-compatible for users of logger.init()
Matthew Wild <mwild1@gmail.com>
parents: 977
diff changeset
134 name_patterns[name_pattern][#name_patterns[name_pattern] + 1] = sink_function;
9e31e9397cff util.logger: Revamped logger library, but backwards-compatible for users of logger.init()
Matthew Wild <mwild1@gmail.com>
parents: 977
diff changeset
135 end
9e31e9397cff util.logger: Revamped logger library, but backwards-compatible for users of logger.init()
Matthew Wild <mwild1@gmail.com>
parents: 977
diff changeset
136 end
9e31e9397cff util.logger: Revamped logger library, but backwards-compatible for users of logger.init()
Matthew Wild <mwild1@gmail.com>
parents: 977
diff changeset
137
9e31e9397cff util.logger: Revamped logger library, but backwards-compatible for users of logger.init()
Matthew Wild <mwild1@gmail.com>
parents: 977
diff changeset
138 _M.new = make_logger;
9e31e9397cff util.logger: Revamped logger library, but backwards-compatible for users of logger.init()
Matthew Wild <mwild1@gmail.com>
parents: 977
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139
360
e918c979ad1a Remove or comment useless prints, or change them to log()
Matthew Wild <mwild1@gmail.com>
parents: 262
diff changeset
140 return _M;