prosody
7772dde4010b
util/logger.lua

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util/logger.lua @ 2332:7772dde4010b

mod_posix: Catch SIGINT
author Matthew Wild <mwild1@gmail.com>
date Mon, 07 Dec 2009 18:38:35 +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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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 };
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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
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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
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;