prosody
a81c710b1708
util/logger.lua

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util/logger.lua @ 2511:a81c710b1708

prosodyctl: Don't display message about failing to start Prosody is daemonizing is disabled (if daemonizing is disabled then Prosody is stopped by the time control returns to prosodyctl, which then can't see Prosody running)
author Matthew Wild <mwild1@gmail.com>
date Thu, 28 Jan 2010 15:05:30 +0000
parent 1523:841d61be198f
child 2923:b7049746bd29
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2009 Matthew Wild
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3 -- Copyright (C) 2008-2009 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 config = require "core.configmanager";
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12 local log_sources = config.get("*", "core", "log_sources");
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13
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14 local find = string.find;
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15 local ipairs, pairs, setmetatable = ipairs, pairs, setmetatable;
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16
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17 module "logger"
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18
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19 local name_sinks, level_sinks = {}, {};
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20 local name_patterns = {};
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21
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22 -- Weak-keyed so that loggers are collected
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23 local modify_hooks = setmetatable({}, { __mode = "k" });
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24
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25 local make_logger;
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26 local outfunction = nil;
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27
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28 function init(name)
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29 if log_sources then
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30 local log_this = false;
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31 for _, source in ipairs(log_sources) do
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32 if find(name, source) then
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33 log_this = true;
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34 break;
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35 end
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36 end
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37
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38 if not log_this then return function () end end
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39 end
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40
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41 local log_debug = make_logger(name, "debug");
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42 local log_info = make_logger(name, "info");
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43 local log_warn = make_logger(name, "warn");
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44 local log_error = make_logger(name, "error");
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45
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46 --name = nil; -- While this line is not commented, will automatically fill in file/line number info
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47 local namelen = #name;
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48 return function (level, message, ...)
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49 if outfunction then return outfunction(name, level, message, ...); end
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50
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51 if level == "debug" then
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52 return log_debug(message, ...);
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53 elseif level == "info" then
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54 return log_info(message, ...);
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55 elseif level == "warn" then
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56 return log_warn(message, ...);
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57 elseif level == "error" then
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58 return log_error(message, ...);
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59 end
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60 end
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61 end
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62
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63 function make_logger(source_name, level)
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64 local level_handlers = level_sinks[level];
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65 if not level_handlers then
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66 level_handlers = {};
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67 level_sinks[level] = level_handlers;
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68 end
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69
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70 local source_handlers = name_sinks[source_name];
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71
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72 -- All your premature optimisation is belong to me!
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73 local num_level_handlers, num_source_handlers = #level_handlers, source_handlers and #source_handlers;
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74
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75 local logger = function (message, ...)
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76 if source_handlers then
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77 for i = 1,num_source_handlers do
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78 if source_handlers[i](source_name, level, message, ...) == false then
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79 return;
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80 end
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81 end
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82 end
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83
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84 for i = 1,num_level_handlers do
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85 level_handlers[i](source_name, level, message, ...);
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86 end
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87 end
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88
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89 -- To make sure our cached lengths stay in sync with reality
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90 modify_hooks[logger] = function () num_level_handlers, num_source_handlers = #level_handlers, source_handlers and #source_handlers; end;
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91
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92 return logger;
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93 end
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94
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95 function setwriter(f)
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96 local old_func = outfunction;
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97 if not f then outfunction = nil; return true, old_func; end
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98 local ok, ret = pcall(f, "logger", "info", "Switched logging output successfully");
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99 if ok then
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100 outfunction = f;
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101 ret = old_func;
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102 end
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103 return ok, ret;
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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()
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133 else
9e31e9397cff util.logger: Revamped logger library, but backwards-compatible for users of logger.init()
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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
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135 end
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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136 end
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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137
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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138 _M.new = make_logger;
9e31e9397cff util.logger: Revamped logger library, but backwards-compatible for users of logger.init()
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139
360
e918c979ad1a Remove or comment useless prints, or change them to log()
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140 return _M;