prosody
495de404a8ae
util/watchdog.lua

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util/watchdog.lua @ 7567:495de404a8ae

ejabberdsql2prosody: rename variable 'host' to prevent shadowing upvalue [luacheck] Functions roster(), roster_pending(), roster_group(), private_storage() and offline_msg() have argument named "host", which used to shadow upvalue of this variable before this change. Instead of renaming this argument, let's rename the variable to match what the script says in usage: Usage: ejabberdsql2prosody.lua filename.txt hostname
author Anton Shestakov <av6@dwimlabs.net>
date Fri, 12 Aug 2016 13:44:47 +0800
parent 6777:5de6b93d0190
child 8555:4f0f5b49bb03
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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
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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({ timeout = timeout, last_reset = os_time(), callback = callback }, watchdog_mt);
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12 timer.add_task(timeout+1, function (current_time)
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13 local last_reset = watchdog.last_reset;
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14 if not last_reset then
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15 return;
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16 end
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17 local time_left = (last_reset + timeout) - current_time;
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18 if time_left < 0 then
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189cfe565d03 util.watchdog: Pass watchdog object to callback so that it doesn't always have to be a closure
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19 return watchdog:callback();
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20 end
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21 return time_left + 1;
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22 end);
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23 return watchdog;
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24 end
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25
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26 function watchdog_methods:reset()
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27 self.last_reset = os_time();
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28 end
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29
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30 function watchdog_methods:cancel()
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31 self.last_reset = nil;
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32 end
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33
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34 return {
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35 new = new;
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36 };