module:set_global(); local async = require("prosody.util.async"); local cron_initial_delay = module:get_option_number("cron_initial_delay", 1); local cron_check_delay = module:get_option_number("cron_check_delay", 3600); local cron_spread_factor = module:get_option_number("cron_spread_factor", 0); local active_hosts = {} function module.add_host(host_module) local last_run_times = host_module:open_store("cron", "map"); active_hosts[host_module.host] = true; local function save_task(task, started_at) last_run_times:set(nil, task.id, started_at); end local function restore_task(task) if task.last == nil then task.last = last_run_times:get(nil, task.id); end end local function task_added(event) local task = event.item; if task.name == nil then task.name = task.when; end if task.id == nil then task.id = event.source.name .. "/" .. task.name:gsub("%W", "_"):lower(); end task.period = host_module:get_option_period(task.id:gsub("/", "_") .. "_period", "1" .. task.when, 60, 86400 * 7 * 53); task.restore = restore_task; task.save = save_task; module:log("debug", "%s task %s added", task.when, task.id); return true end local function task_removed(event) local task = event.item; host_module:log("debug", "Task %s removed", task.id); return true end host_module:handle_items("task", task_added, task_removed, true); function host_module.unload() active_hosts[host_module.host] = nil; end end local function should_run(task, last) return not last or last + task.period * 0.995 <= os.time() end local function run_task(task) task:restore(); if not should_run(task, task.last) then return end local started_at = os.time(); task:run(started_at); task.last = started_at; task:save(started_at); end local function spread(t, factor) return t * (1 - factor + 2*factor*math.random()); end local task_runner = async.runner(run_task); scheduled = module:add_timer(cron_initial_delay, function() module:log("info", "Running periodic tasks"); local delay = spread(cron_check_delay, cron_spread_factor); for host in pairs(active_hosts) do module:log("debug", "Running periodic tasks for host %s", host); for _, task in ipairs(module:context(host):get_host_items("task")) do task_runner:run(task); end end module:log("debug", "Wait %ds", delay); return delay end); module:add_item("shell-command", { section = "cron"; section_desc = "View and manage recurring tasks"; name = "tasks"; desc = "View registered tasks"; args = {}; handler = function(self, filter_host) local format_table = require("prosody.util.human.io").table; local it = require("util.iterators"); local row = format_table({ { title = "Host"; width = "2p" }; { title = "Task"; width = "3p" }; { title = "Desc"; width = "3p" }; { title = "When"; width = "1p" }; { title = "Last run"; width = "20" }; }, self.session.width); local print = self.session.print; print(row()); for host in it.sorted_pairs(filter_host and { [filter_host] = true } or active_hosts) do for _, task in ipairs(module:context(host):get_host_items("task")) do print(row({ host; task.id; task.name; task.when; task.last and os.date("%Y-%m-%d %R:%S", task.last) or "never" })); end end end; });