prosody
a451f80d1cea
util/logger.lua

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util/logger.lua @ 10890:a451f80d1cea

util.human.units: Handle lack of math.log(n, base) on Lua 5.1
author Kim Alvefur <zash@zash.se>
date Wed, 03 Jun 2020 20:17:33 +0200
parent 8556:5800f0c7afd6
child 12394:86d6b069b892
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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 -- luacheck: ignore 213/level
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9
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10 local pairs = pairs;
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11 local ipairs = ipairs;
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12 local require = require;
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13
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14 local _ENV = nil;
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15 -- luacheck: std none
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17 local level_sinks = {};
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18
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19 local make_logger;
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20
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21 local function init(name)
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22 local log_debug = make_logger(name, "debug");
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23 local log_info = make_logger(name, "info");
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24 local log_warn = make_logger(name, "warn");
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25 local log_error = make_logger(name, "error");
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27 return function (level, message, ...)
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28 if level == "debug" then
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29 return log_debug(message, ...);
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30 elseif level == "info" then
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31 return log_info(message, ...);
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32 elseif level == "warn" then
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33 return log_warn(message, ...);
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34 elseif level == "error" then
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35 return log_error(message, ...);
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36 end
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37 end
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38 end
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39
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40 function make_logger(source_name, level)
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41 local level_handlers = level_sinks[level];
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42 if not level_handlers then
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43 level_handlers = {};
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44 level_sinks[level] = level_handlers;
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45 end
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47 local logger = function (message, ...)
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48 for i = 1,#level_handlers do
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49 level_handlers[i](source_name, level, message, ...);
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50 end
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51 end
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52
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53 return logger;
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54 end
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55
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56 local function reset()
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57 for level, handler_list in pairs(level_sinks) do
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58 -- Clear all handlers for this level
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59 for i = 1, #handler_list do
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60 handler_list[i] = nil;
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61 end
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62 end
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63 end
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64
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65 local function add_level_sink(level, sink_function)
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66 if not level_sinks[level] then
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67 level_sinks[level] = { sink_function };
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68 else
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69 level_sinks[level][#level_sinks[level] + 1 ] = sink_function;
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70 end
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71 end
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72
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73 local function add_simple_sink(simple_sink_function, levels)
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74 local format = require "util.format".format;
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75 local function sink_function(name, level, msg, ...)
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76 return simple_sink_function(name, level, format(msg, ...));
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77 end
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78 for _, level in ipairs(levels or {"debug", "info", "warn", "error"}) do
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79 add_level_sink(level, sink_function);
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80 end
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81 end
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82
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83 return {
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84 init = init;
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85 make_logger = make_logger;
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86 reset = reset;
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87 add_level_sink = add_level_sink;
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88 add_simple_sink = add_simple_sink;
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89 new = make_logger;
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90 };