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util/watchdog.lua

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util/watchdog.lua @ 13270:14bbfb2cc8dd default tip

lint: Teach luacheck about module:once Silence warning for using this introduced in 9c62ffbdf2ae
author Kim Alvefur <zash@zash.se>
date Sun, 15 Oct 2023 16:43:14 +0200
parent 12975:d10957394a3c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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d10957394a3c util: Prefix module imports with prosody namespace
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1 local timer = require "prosody.util.timer";
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2 local setmetatable = setmetatable;
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3
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4 local _ENV = nil;
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5 -- luacheck: std none
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6
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7 local watchdog_methods = {};
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8 local watchdog_mt = { __index = watchdog_methods };
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9
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10 local function new(timeout, callback)
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11 local watchdog = setmetatable({
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12 timeout = timeout;
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13 callback = callback;
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14 timer_id = nil;
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15 }, watchdog_mt);
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16
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17 watchdog:reset(); -- Kick things off
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18
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19 return watchdog;
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20 end
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21
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22 function watchdog_methods:reset(new_timeout)
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23 if new_timeout then
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24 self.timeout = new_timeout;
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25 end
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26 if self.timer_id then
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27 timer.reschedule(self.timer_id, self.timeout+1);
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28 else
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29 self.timer_id = timer.add_task(self.timeout+1, function ()
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30 return self:callback();
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31 end);
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32 end
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33 end
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34
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35 function watchdog_methods:cancel()
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36 if self.timer_id then
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37 timer.stop(self.timer_id);
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38 self.timer_id = nil;
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39 end
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40 end
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41
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42 return {
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43 new = new;
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44 };