diff options
Diffstat (limited to 'teal-src/plugins/mod_cron.tl')
-rw-r--r-- | teal-src/plugins/mod_cron.tl | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/teal-src/plugins/mod_cron.tl b/teal-src/plugins/mod_cron.tl deleted file mode 100644 index f3b8f62f..00000000 --- a/teal-src/plugins/mod_cron.tl +++ /dev/null @@ -1,106 +0,0 @@ -module:set_global(); - -local async = require "util.async"; -local datetime = require "util.datetime"; - -local record map_store<K,V> - -- TODO move to somewhere sensible - get : function (map_store<K,V>, string, K) : V - set : function (map_store<K,V>, string, K, V) -end - -local enum frequency - "hourly" - "daily" - "weekly" -end - -local record task_spec - id : string -- unique id - name : string -- name or short description - when : frequency - last : integer - run : function (task_spec, integer) - save : function (task_spec, integer) -end - -local record task_event - source : module - item : task_spec -end - -local periods : { frequency : integer } = { hourly = 3600, daily = 86400, weekly = 7*86400 } - -local active_hosts : { string : boolean } = { } - -function module.add_host(host_module : moduleapi) - - local last_run_times = host_module:open_store("cron", "map") as map_store<string,integer>; - active_hosts[host_module.host] = true; - - local function save_task(task : task_spec, started_at : integer) - last_run_times:set(nil, task.id, started_at); - end - - local function task_added(event : task_event) : boolean - 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 - -- initialize new tasks so e.g. daily tasks run at ~midnight UTC for now - local now = os.time(); - task.last = now - now % periods[task.when]; - end - return true; - end - - local function task_removed(event : task_event) : boolean - 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 : frequency, last : integer) : boolean - return not last or last + periods[when]*0.995 <= os.time(); -end - -local function run_task(task : task_spec) - local started_at = os.time(); - task:run(started_at); - task.last = started_at; - task:save(started_at); -end - -local task_runner = async.runner(run_task); -module:add_timer(1, function() : integer - 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") as { task_spec } ) 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); - --- TODO measure load, pick a good time to do stuff |