prosody
e2919978673e
core/statsmanager.lua

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core/statsmanager.lua @ 8706:e2919978673e

net.http: Fix parameter order to http request callbacks Commit e3b9dc9dd940 changed the parameter order in 2013, but did not update the names of the parameters in the callback function. Due to this inconsistency, 12df41a5a4b1 accidentally reversed the order when fixing the variable names without fixing where they are used. Additionally the documentation was incorrect (since 2013), and this has also now been fixed.
author Matthew Wild <mwild1@gmail.com>
date Wed, 04 Apr 2018 18:27:44 +0100
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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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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73
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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 };