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plugins/mod_cron.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 13269:d50bee584969
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1 module:set_global();
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2
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3 local async = require("prosody.util.async");
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4
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5 local periods = { hourly = 3600; daily = 86400; weekly = 7 * 86400 }
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6
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7 local active_hosts = {}
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8
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9 function module.add_host(host_module)
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10
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11 local last_run_times = host_module:open_store("cron", "map");
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12 active_hosts[host_module.host] = true;
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13
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14 local function save_task(task, started_at)
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15 last_run_times:set(nil, task.id, started_at);
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16 end
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17
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18 local function restore_task(task)
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19 if task.last == nil then
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20 task.last = last_run_times:get(nil, task.id);
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21 end
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22 end
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23
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24 local function task_added(event)
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25 local task = event.item;
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26 if task.name == nil then
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27 task.name = task.when;
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28 end
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29 if task.id == nil then
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30 task.id = event.source.name .. "/" .. task.name:gsub("%W", "_"):lower();
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31 end
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32 task.restore = restore_task;
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33 task.save = save_task;
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34 module:log("debug", "%s task %s added", task.when, task.id);
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35 return true
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36 end
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37
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38 local function task_removed(event)
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39 local task = event.item;
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40 host_module:log("debug", "Task %s removed", task.id);
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41 return true
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42 end
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43
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44 host_module:handle_items("task", task_added, task_removed, true);
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45
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46 function host_module.unload()
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47 active_hosts[host_module.host] = nil;
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48 end
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49 end
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50
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51 local function should_run(when, last)
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52 return not last or last + periods[when] * 0.995 <= os.time()
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53 end
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54
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55 local function run_task(task)
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56 task:restore();
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57 if not should_run(task.when, task.last) then
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58 return
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59 end
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60 local started_at = os.time();
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61 task:run(started_at);
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62 task.last = started_at;
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63 task:save(started_at);
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64 end
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65
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66 local task_runner = async.runner(run_task);
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67 scheduled = module:add_timer(1, function()
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68 module:log("info", "Running periodic tasks");
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69 local delay = 3600;
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70 for host in pairs(active_hosts) do
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71 module:log("debug", "Running periodic tasks for host %s", host);
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72 for _, task in ipairs(module:context(host):get_host_items("task")) do
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73 task_runner:run(task);
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74 end
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75 end
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76 module:log("debug", "Wait %ds", delay);
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77 return delay
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78 end);