prosody
f5d2e58fbefa
util/logger.lua

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util/logger.lua @ 6937:f5d2e58fbefa

util.session: What is a session?
author Kim Alvefur <zash@zash.se>
date Tue, 24 Nov 2015 19:00:43 +0100
parent 6777:5de6b93d0190
child 7130:2b48ce0bfe7d
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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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11 local find = string.find;
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12 local ipairs, pairs, setmetatable = ipairs, pairs, setmetatable;
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14 local _ENV = nil;
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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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19
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20 local 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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25
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26 return function (level, message, ...)
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27 if level == "debug" then
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28 return log_debug(message, ...);
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29 elseif level == "info" then
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30 return log_info(message, ...);
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31 elseif level == "warn" then
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32 return log_warn(message, ...);
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33 elseif level == "error" then
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34 return log_error(message, ...);
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35 end
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36 end
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37 end
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38
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39 function make_logger(source_name, level)
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40 local level_handlers = level_sinks[level];
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41 if not level_handlers then
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42 level_handlers = {};
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43 level_sinks[level] = level_handlers;
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44 end
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46 local logger = function (message, ...)
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47 for i = 1,#level_handlers do
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48 level_handlers[i](source_name, level, message, ...);
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49 end
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50 end
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51
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52 return logger;
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53 end
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55 local function reset()
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56 for level, handler_list in pairs(level_sinks) do
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57 -- Clear all handlers for this level
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58 for i = 1, #handler_list do
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59 handler_list[i] = nil;
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60 end
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61 end
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62 end
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63
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64 local function add_level_sink(level, sink_function)
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65 if not level_sinks[level] then
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66 level_sinks[level] = { sink_function };
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67 else
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68 level_sinks[level][#level_sinks[level] + 1 ] = sink_function;
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69 end
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70 end
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71
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72 return {
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73 init = init;
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74 make_logger = make_logger;
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75 reset = reset;
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76 add_level_sink = add_level_sink;
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77 new = make_logger;
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78 };