prosody
ce793cea9f10
util/logger.lua

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util/logger.lua @ 4841:ce793cea9f10

Merge with backout
author Matthew Wild <mwild1@gmail.com>
date Fri, 11 May 2012 01:32:46 +0100
parent 4627:b046cafc81a8
child 4937:b3fe52353295
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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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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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14 module "logger"
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16 local level_sinks = {};
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17
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18 local make_logger;
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20 function init(name)
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21 local log_debug = make_logger(name, "debug");
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22 local log_info = make_logger(name, "info");
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23 local log_warn = make_logger(name, "warn");
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24 local log_error = make_logger(name, "error");
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26 --name = nil; -- While this line is not commented, will automatically fill in file/line number info
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27 local namelen = #name;
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28 return function (level, message, ...)
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29 if level == "debug" then
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30 return log_debug(message, ...);
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31 elseif level == "info" then
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32 return log_info(message, ...);
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33 elseif level == "warn" then
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34 return log_warn(message, ...);
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35 elseif level == "error" then
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36 return log_error(message, ...);
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37 end
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38 end
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39 end
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41 function make_logger(source_name, level)
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42 local level_handlers = level_sinks[level];
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43 if not level_handlers then
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44 level_handlers = {};
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45 level_sinks[level] = level_handlers;
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46 end
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48 local logger = function (message, ...)
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49 for i = 1,#level_handlers do
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50 level_handlers[i](source_name, level, message, ...);
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51 end
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52 end
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54 return logger;
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55 end
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57 function reset()
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58 for level, handler_list in pairs(level_sinks) do
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59 -- Clear all handlers for this level
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60 for i = 1, #handler_list do
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61 handler_list[i] = nil;
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62 end
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63 end
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64 end
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65
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66 function add_level_sink(level, sink_function)
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67 if not level_sinks[level] then
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68 level_sinks[level] = { sink_function };
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69 else
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70 level_sinks[level][#level_sinks[level] + 1 ] = sink_function;
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71 end
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72 end
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74 _M.new = make_logger;
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75
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76 return _M;