prosody
2f3b08ad9b8a
core/statsmanager.lua

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core/statsmanager.lua @ 8716:2f3b08ad9b8a

luacheckrc: Forget about _G.hosts, things should use _G.prosody.hosts
author Kim Alvefur <zash@zash.se>
date Thu, 29 Mar 2018 16:42:24 +0200
parent 7664:4f145a9f1477
child 9804:7929e0fe0577
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1
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2 local config = require "core.configmanager";
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3 local log = require "util.logger".init("stats");
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4 local timer = require "util.timer";
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5 local fire_event = prosody.events.fire_event;
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6
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7 local stats_interval_config = config.get("*", "statistics_interval");
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8 local stats_interval = tonumber(stats_interval_config);
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9 if stats_interval_config and not stats_interval then
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10 log("error", "Invalid 'statistics_interval' setting, statistics will be disabled");
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11 end
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12
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13 local stats_provider_name;
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14 local stats_provider_config = config.get("*", "statistics");
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15 local stats_provider = stats_provider_config;
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17 if not stats_provider and stats_interval then
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18 stats_provider = "internal";
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19 elseif stats_provider and not stats_interval then
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20 stats_interval = 60;
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21 end
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23 local builtin_providers = {
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24 internal = "util.statistics";
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25 statsd = "util.statsd";
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26 };
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27
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29 local stats, stats_err = false, nil;
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31 if stats_provider then
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32 if stats_provider:sub(1,1) == ":" then
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33 stats_provider = stats_provider:sub(2);
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34 stats_provider_name = "external "..stats_provider;
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35 elseif stats_provider then
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36 stats_provider_name = "built-in "..stats_provider;
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37 stats_provider = builtin_providers[stats_provider];
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38 if not stats_provider then
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39 log("error", "Unrecognized statistics provider '%s', statistics will be disabled", stats_provider_config);
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40 end
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41 end
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43 local have_stats_provider, stats_lib = pcall(require, stats_provider);
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44 if not have_stats_provider then
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45 stats, stats_err = nil, stats_lib;
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46 else
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47 local stats_config = config.get("*", "statistics_config");
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48 stats, stats_err = stats_lib.new(stats_config);
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49 stats_provider_name = stats_lib._NAME or stats_provider_name;
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50 end
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51 end
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52
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53 if stats == nil then
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54 log("error", "Error loading statistics provider '%s': %s", stats_provider, stats_err);
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55 end
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56
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57 local measure, collect;
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58 local latest_stats = {};
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59 local changed_stats = {};
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60 local stats_extra = {};
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61
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62 if stats then
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63 function measure(type, name)
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64 local f = assert(stats[type], "unknown stat type: "..type);
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65 return f(name);
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66 end
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68 if stats_interval then
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69 log("debug", "Statistics enabled using %s provider, collecting every %d seconds", stats_provider_name, stats_interval);
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71 local mark_collection_start = measure("times", "stats.collection");
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72 local mark_processing_start = measure("times", "stats.processing");
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74 function collect()
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75 local mark_collection_done = mark_collection_start();
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76 fire_event("stats-update");
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77 mark_collection_done();
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78
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79 if stats.get_stats then
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80 changed_stats, stats_extra = {}, {};
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81 for stat_name, getter in pairs(stats.get_stats()) do
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82 local type, value, extra = getter();
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83 local old_value = latest_stats[stat_name];
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84 latest_stats[stat_name] = value;
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85 if value ~= old_value then
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86 changed_stats[stat_name] = value;
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87 end
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88 if extra then
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89 stats_extra[stat_name] = extra;
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90 end
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91 end
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92 local mark_processing_done = mark_processing_start();
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93 fire_event("stats-updated", { stats = latest_stats, changed_stats = changed_stats, stats_extra = stats_extra });
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94 mark_processing_done();
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95 end
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96 return stats_interval;
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97 end
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98 timer.add_task(stats_interval, collect);
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99 prosody.events.add_handler("server-started", function () collect() end, -1);
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100 else
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101 log("debug", "Statistics enabled using %s provider, collection is disabled", stats_provider_name);
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102 end
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103 else
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104 log("debug", "Statistics disabled");
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105 function measure() return measure; end
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106 end
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107
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108
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109 return {
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110 measure = measure;
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111 get_stats = function ()
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112 return latest_stats, changed_stats, stats_extra;
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113 end;
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114 get = function (name)
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115 return latest_stats[name], stats_extra[name];
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116 end;
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117 };