prosody
5ce6cbb5ce6a
util/watchdog.lua

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util/watchdog.lua @ 10460:5ce6cbb5ce6a

mod_http: Log served URLs at 'info' level These are similar to the "activated service" messages from portmanager and similarily useful for the service admin to know even if they're not debugging anything.
author Kim Alvefur <zash@zash.se>
date Fri, 29 Nov 2019 21:30:08 +0100
parent 8555:4f0f5b49bb03
child 12545:5059a639f61e
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0ed617f58404 util.watchdog: Watchdog timer library
Matthew Wild <mwild1@gmail.com>
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1 local timer = require "util.timer";
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2 local setmetatable = setmetatable;
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3 local os_time = os.time;
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4
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5 local _ENV = nil;
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6 -- luacheck: std none
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8 local watchdog_methods = {};
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9 local watchdog_mt = { __index = watchdog_methods };
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10
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11 local function new(timeout, callback)
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12 local watchdog = setmetatable({ timeout = timeout, last_reset = os_time(), callback = callback }, watchdog_mt);
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13 timer.add_task(timeout+1, function (current_time)
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14 local last_reset = watchdog.last_reset;
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15 if not last_reset then
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16 return;
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17 end
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18 local time_left = (last_reset + timeout) - current_time;
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19 if time_left < 0 then
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20 return watchdog:callback();
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21 end
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22 return time_left + 1;
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23 end);
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24 return watchdog;
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25 end
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26
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27 function watchdog_methods:reset()
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28 self.last_reset = os_time();
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29 end
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30
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31 function watchdog_methods:cancel()
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32 self.last_reset = nil;
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33 end
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34
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35 return {
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36 new = new;
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37 };