prosody
ebf0813a81f6
core/loggingmanager.lua

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core/loggingmanager.lua @ 1613:ebf0813a81f6

core.loggingmanager: Enable timestamps by default for file log sinks
author Matthew Wild <mwild1@gmail.com>
date Tue, 28 Jul 2009 15:03:42 +0100
parent 1522:569d58d21612
child 1892:adc0c80413ee
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1522
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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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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
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10 local format, rep = string.format, string.rep;
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11 local pcall = pcall;
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12 local debug = debug;
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13 local tostring, setmetatable, rawset, pairs, ipairs, type =
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14 tostring, setmetatable, rawset, pairs, ipairs, type;
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15 local io_open, io_write = io.open, io.write;
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16 local math_max, rep = math.max, string.rep;
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17 local os_date, os_getenv = os.date, os.getenv;
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18 local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring;
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19
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20 local config = require "core.configmanager";
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21 local eventmanager = require "core.eventmanager";
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22 local logger = require "util.logger";
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23 local debug_mode = config.get("*", "core", "debug");
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24
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25 _G.log = logger.init("general");
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26
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27 module "loggingmanager"
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28
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29 -- The log config used if none specified in the config file
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30 local default_logging = { { to = "console" } };
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31 local default_file_logging = { { to = "file", levels = { min = (debug_mode and "debug") or "info" }, timestamps = true } };
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32 local default_timestamp = "%b %d %T";
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33 -- The actual config loggingmanager is using
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34 local logging_config = config.get("*", "core", "log") or default_logging;
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36 local apply_sink_rules;
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37 local log_sink_types = setmetatable({}, { __newindex = function (t, k, v) rawset(t, k, v); apply_sink_rules(k); end; });
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38 local get_levels;
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39 local logging_levels = { "debug", "info", "warn", "error", "critical" }
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41 -- Put a rule into action. Requires that the sink type has already been registered.
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42 -- This function is called automatically when a new sink type is added [see apply_sink_rules()]
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43 local function add_rule(sink_config)
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44 local sink_maker = log_sink_types[sink_config.to];
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45 if sink_maker then
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46 if sink_config.levels and not sink_config.source then
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47 -- Create sink
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48 local sink = sink_maker(sink_config);
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49
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50 -- Set sink for all chosen levels
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51 for level in pairs(get_levels(sink_config.levels)) do
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52 logger.add_level_sink(level, sink);
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53 end
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54 elseif sink_config.source and not sink_config.levels then
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55 logger.add_name_sink(sink_config.source, sink_maker(sink_config));
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56 elseif sink_config.source and sink_config.levels then
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57 local levels = get_levels(sink_config.levels);
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58 local sink = sink_maker(sink_config);
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59 logger.add_name_sink(sink_config.source,
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60 function (name, level, ...)
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61 if levels[level] then
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62 return sink(name, level, ...);
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63 end
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64 end);
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65 else
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66 -- All sources
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67 -- Create sink
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68 local sink = sink_maker(sink_config);
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69
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70 -- Set sink for all levels
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71 for _, level in pairs(logging_levels) do
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72 logger.add_level_sink(level, sink);
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73 end
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74 end
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75 else
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76 -- No such sink type
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77 end
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78 end
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79
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80 -- Search for all rules using a particular sink type, and apply
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81 -- them. Called automatically when a new sink type is added to
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82 -- the log_sink_types table.
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83 function apply_sink_rules(sink_type)
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84 if type(logging_config) == "table" then
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85 for _, sink_config in pairs(logging_config) do
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86 if sink_config.to == sink_type then
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87 add_rule(sink_config);
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88 end
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89 end
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90 elseif type(logging_config) == "string" and (not logging_config:match("^%*")) and sink_type == "file" then
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91 -- User specified simply a filename, and the "file" sink type
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92 -- was just added
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93 for _, sink_config in pairs(default_file_logging) do
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94 sink_config.filename = logging_config;
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95 add_rule(sink_config);
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96 sink_config.filename = nil;
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97 end
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98 elseif type(logging_config) == "string" and logging_config:match("^%*(.+)") == sink_type then
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99 -- Log all levels (debug+) to this sink
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100 add_rule({ levels = { min = "debug" }, to = sink_type });
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101 end
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102 end
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103
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104
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105
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106 --- Helper function to get a set of levels given a "criteria" table
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107 function get_levels(criteria, set)
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108 set = set or {};
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109 if type(criteria) == "string" then
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110 set[criteria] = true;
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111 return set;
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112 end
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113 local min, max = criteria.min, criteria.max;
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114 if min or max then
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115 local in_range;
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116 for _, level in ipairs(logging_levels) do
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117 if min == level then
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118 set[level] = true;
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119 in_range = true;
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120 elseif max == level then
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121 set[level] = true;
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122 return set;
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123 elseif in_range then
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124 set[level] = true;
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125 end
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126 end
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127 end
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128
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129 for _, level in ipairs(criteria) do
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130 set[level] = true;
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131 end
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132 return set;
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133 end
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134
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135 --- Definition of built-in logging sinks ---
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136
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137 -- Null sink, must enter log_sink_types *first*
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138 function log_sink_types.nowhere()
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139 return function () return false; end;
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140 end
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141
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142 -- Column width for "source" (used by stdout and console)
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143 local sourcewidth = 20;
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144
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145 function log_sink_types.stdout()
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146 local timestamps = config.timestamps;
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147
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148 if timestamps == true then
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149 timestamps = default_timestamp; -- Default format
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150 end
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151
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152 return function (name, level, message, ...)
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153 sourcewidth = math_max(#name+2, sourcewidth);
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154 local namelen = #name;
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155 if timestamps then
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156 io_write(os_date(timestamps), " ");
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157 end
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158 if ... then
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159 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", format(message, ...), "\n");
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160 else
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161 io_write(name, rep(" ", sourcewidth-namelen), level, "\t", message, "\n");
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162 end
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163 end
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164 end
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165
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166 do
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167 local do_pretty_printing = not os_getenv("WINDIR");
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168
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169 local logstyles = {};
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170 if do_pretty_printing then
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171 logstyles["info"] = getstyle("bold");
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172 logstyles["warn"] = getstyle("bold", "yellow");
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173 logstyles["error"] = getstyle("bold", "red");
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174 end
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175 function log_sink_types.console(config)
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176 -- Really if we don't want pretty colours then just use plain stdout
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177 if not do_pretty_printing then
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178 return log_sink_types.stdout(config);
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179 end
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180
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181 local timestamps = config.timestamps;
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182
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183 if timestamps == true then
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184 timestamps = default_timestamp; -- Default format
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185 end
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186
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187 return function (name, level, message, ...)
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188 sourcewidth = math_max(#name+2, sourcewidth);
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189 local namelen = #name;
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190 if timestamps then
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191 io_write(os_date(timestamps), " ");
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192 end
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193 if ... then
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194 io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], level), "\t", format(message, ...), "\n");
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195 else
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196 io_write(name, rep(" ", sourcewidth-namelen), getstring(logstyles[level], level), "\t", message, "\n");
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197 end
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198 end
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199 end
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200 end
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201
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202 local empty_function = function () end;
1031
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203 function log_sink_types.file(config)
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204 local log = config.filename;
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205 local logfile = io_open(log, "a+");
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206 if not logfile then
1117
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207 return empty_function;
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208 end
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209 local write, flush = logfile.write, logfile.flush;
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210
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211 eventmanager.add_event_hook("reopen-log-files", function ()
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212 if logfile then
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213 logfile:close();
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214 end
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215 logfile = io_open(log, "a+");
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diff changeset
216 if not logfile then
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217 write, flush = empty_function, empty_function;
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218 else
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219 write, flush = logfile.write, logfile.flush;
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220 end
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221 end);
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222
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223 local timestamps = config.timestamps;
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224
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225 if timestamps == nil or timestamps == true then
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226 timestamps = default_timestamp; -- Default format
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227 end
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228
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229 return function (name, level, message, ...)
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230 if timestamps then
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231 write(logfile, os_date(timestamps), " ");
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232 end
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233 if ... then
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234 write(logfile, name, "\t", level, "\t", format(message, ...), "\n");
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diff changeset
235 else
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236 write(logfile, name, "\t" , level, "\t", message, "\n");
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237 end
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238 flush(logfile);
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239 end;
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240 end
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241
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diff changeset
242 function register_sink_type(name, sink_maker)
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diff changeset
243 local old_sink_maker = log_sink_types[name];
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parents: 1024
diff changeset
244 log_sink_types[name] = sink_maker;
ec013f93de81 core.loggingmanager: Refactoring, converted to a module. Now possible to register additional sink types (think syslog) from other modules
Matthew Wild <mwild1@gmail.com>
parents: 1024
diff changeset
245 return old_sink_maker;
ec013f93de81 core.loggingmanager: Refactoring, converted to a module. Now possible to register additional sink types (think syslog) from other modules
Matthew Wild <mwild1@gmail.com>
parents: 1024
diff changeset
246 end
ec013f93de81 core.loggingmanager: Refactoring, converted to a module. Now possible to register additional sink types (think syslog) from other modules
Matthew Wild <mwild1@gmail.com>
parents: 1024
diff changeset
247
ec013f93de81 core.loggingmanager: Refactoring, converted to a module. Now possible to register additional sink types (think syslog) from other modules
Matthew Wild <mwild1@gmail.com>
parents: 1024
diff changeset
248 return _M;