prosody
6938b6153890
util/logger.lua

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util/logger.lua @ 3555:6938b6153890

mod_posix: Remove redundant import of logger.setwriter()
author Matthew Wild <mwild1@gmail.com>
date Thu, 04 Nov 2010 08:41:24 +0000
parent 3554:1770f8aaf04a
child 3556:d00fc909296e
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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 local outfunction = nil;
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21
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22 function init(name)
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23 local log_debug = make_logger(name, "debug");
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24 local log_info = make_logger(name, "info");
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25 local log_warn = make_logger(name, "warn");
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26 local log_error = make_logger(name, "error");
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27
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28 --name = nil; -- While this line is not commented, will automatically fill in file/line number info
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29 local namelen = #name;
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30 return function (level, message, ...)
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31 if outfunction then return outfunction(name, level, message, ...); end
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32
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33 if level == "debug" then
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34 return log_debug(message, ...);
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35 elseif level == "info" then
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36 return log_info(message, ...);
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37 elseif level == "warn" then
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38 return log_warn(message, ...);
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39 elseif level == "error" then
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40 return log_error(message, ...);
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41 end
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42 end
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43 end
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44
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45 function make_logger(source_name, level)
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46 local level_handlers = level_sinks[level];
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47 if not level_handlers then
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48 level_handlers = {};
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49 level_sinks[level] = level_handlers;
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50 end
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51
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52 local source_handlers = name_sinks[source_name];
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54 local logger = function (message, ...)
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55 if source_handlers then
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56 for i = 1,#source_handlers do
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57 if source_handlers[i](source_name, level, message, ...) == false then
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58 return;
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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 for i = 1,#level_handlers do
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64 level_handlers[i](source_name, level, message, ...);
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65 end
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66 end
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67
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68 return logger;
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69 end
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70
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71 function setwriter(f)
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72 local old_func = outfunction;
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73 if not f then outfunction = nil; return true, old_func; end
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74 local ok, ret = pcall(f, "logger", "info", "Switched logging output successfully");
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75 if ok then
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76 outfunction = f;
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77 ret = old_func;
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78 end
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79 return ok, ret;
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80 end
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81
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82 function reset()
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83 for k in pairs(name_sinks) do name_sinks[k] = nil; end
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84 for level, handler_list in pairs(level_sinks) do
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85 -- Clear all handlers for this level
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86 for i = 1, #handler_list do
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87 handler_list[i] = nil;
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88 end
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89 end
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90 for k in pairs(name_patterns) do name_patterns[k] = nil; end
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91 end
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92
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93 function add_level_sink(level, sink_function)
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94 if not level_sinks[level] then
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95 level_sinks[level] = { sink_function };
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96 else
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97 level_sinks[level][#level_sinks[level] + 1 ] = sink_function;
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98 end
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99 end
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100
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101 function add_name_sink(name, sink_function, exclusive)
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102 if not name_sinks[name] then
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103 name_sinks[name] = { sink_function };
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104 else
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105 name_sinks[name][#name_sinks[name] + 1] = sink_function;
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106 end
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107 end
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108
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109 function add_name_pattern_sink(name_pattern, sink_function, exclusive)
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110 if not name_patterns[name_pattern] then
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111 name_patterns[name_pattern] = { sink_function };
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112 else
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113 name_patterns[name_pattern][#name_patterns[name_pattern] + 1] = sink_function;
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114 end
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115 end
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116
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117 _M.new = make_logger;
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118
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119 return _M;