prosody
3c0940f3cf74
util/statsd.lua

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util/statsd.lua @ 11105:3c0940f3cf74 0.11

util.dbuffer: Simplify test case An earlier theory involved the bug being related to collapsing multiple items, so it exercised that too. Also correct the comment, it referred to the space in "hello world" in an earlier version before the test string was changed to "foobar", which was what was tested in a REPL
author Kim Alvefur <zash@zash.se>
date Mon, 24 Aug 2020 17:28:48 +0200
parent 7988:dc758422d896
child 10924:0c072dd69603
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1 local socket = require "socket";
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2
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3 local time = require "util.time".now
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4
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5 local function new(config)
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6 if not config or not config.statsd_server then
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7 return nil, "No statsd server specified in the config, please see https://prosody.im/doc/statistics";
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8 end
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9
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10 local sock = socket.udp();
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11 sock:setpeername(config.statsd_server, config.statsd_port or 8125);
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12
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13 local prefix = (config.prefix or "prosody")..".";
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14
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15 local function send_metric(s)
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16 return sock:send(prefix..s);
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17 end
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19 local function send_gauge(name, amount, relative)
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20 local s_amount = tostring(amount);
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21 if relative and amount > 0 then
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22 s_amount = "+"..s_amount;
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23 end
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24 return send_metric(name..":"..s_amount.."|g");
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25 end
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26
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27 local function send_counter(name, amount)
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28 return send_metric(name..":"..tostring(amount).."|c");
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29 end
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30
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31 local function send_duration(name, duration)
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32 return send_metric(name..":"..tostring(duration).."|ms");
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33 end
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34
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35 local function send_histogram_sample(name, sample)
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36 return send_metric(name..":"..tostring(sample).."|h");
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37 end
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39 local methods;
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40 methods = {
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41 amount = function (name, initial)
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42 if initial then
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43 send_gauge(name, initial);
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44 end
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45 return function (new_v) send_gauge(name, new_v); end
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46 end;
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47 counter = function (name, initial) --luacheck: ignore 212/initial
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48 return function (delta)
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49 send_gauge(name, delta, true);
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50 end;
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51 end;
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52 rate = function (name)
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53 return function ()
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54 send_counter(name, 1);
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55 end;
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56 end;
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57 distribution = function (name, unit, type) --luacheck: ignore 212/unit 212/type
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58 return function (value)
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59 send_histogram_sample(name, value);
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60 end;
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61 end;
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62 sizes = function (name)
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63 name = name.."_size";
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64 return function (value)
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65 send_histogram_sample(name, value);
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66 end;
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67 end;
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68 times = function (name)
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69 return function ()
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70 local start_time = time();
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71 return function ()
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72 local end_time = time();
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73 local duration = end_time - start_time;
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74 send_duration(name, duration*1000);
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75 end
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76 end;
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77 end;
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78 };
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79 return methods;
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80 end
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81
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82 return {
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83 new = new;
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84 }