module:set_global(); local async = require("util.async"); local datetime = require("util.datetime"); local periods = { hourly = 3600; daily = 86400; weekly = 7 * 86400 } 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 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 if task.last == nil then task.last = last_run_times:get(nil, task.id); end task.save = save_task; module:log("debug", "%s task %s added, last run %s", task.when, task.id, task.last and datetime.datetime(task.last) or "never"); if task.last == nil then local now = os.time(); task.last = now - now % periods[task.when]; end 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(when, last) return not last or last + periods[when] <= os.time() end local function run_task(task) local started_at = os.time(); task:run(started_at); task:save(started_at); end local task_runner = async.runner(run_task); scheduled = module:add_timer(1, function() module:log("info", "Running periodic tasks"); local delay = 3600; 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 module:log("debug", "Considering %s task %s (%s)", task.when, task.id, task.run); if should_run(task.when, task.last) then task_runner:run(task); end end end module:log("debug", "Wait %ds", delay); return delay end);