Implements system alerts for not executed activities

scripts/plugins/periodic_activities/user_scripts/system/periodic_activity_not_executed.lua

@@ -0,0 +1,66 @@
+--
+-- (C) 2019-20 - ntop.org
+--
+
+local alert_consts = require("alert_consts")
+local alerts_api = require("alerts_api")
+local user_scripts = require("user_scripts")
+
+local script
+
+-- ##############################################
+
+local function alert_info(ps_name, last_queued_time)
+  return({
+    alert_type = alert_consts.alert_types.alert_periodic_activity_not_executed,
+    alert_severity = alert_consts.alert_severities.warning,
+    alert_granularity = alert_consts.alerts_granularities.min,
+    alert_subtype = ps_name,
+    alert_type_params = {
+       ps_name = ps_name,
+       last_queued_time = last_queued_time
+    },
+  })
+end
+
+-- #################################################################
+
+local function check_periodic_activity_not_executed(params)
+   local scripts_stats = interface.getPeriodicActivitiesStats()
+
+   for ps_name, ps_stats in pairs(scripts_stats) do
+      local delta = alerts_api.interface_delta_val(script.key..ps_name --[[ metric name --]], params.granularity, ps_stats["num_not_executed"] or 0)
+      local info = alert_info(ps_name, ps_stats["last_queued_time"] or 0)
+
+      if delta > 0 then
+	 -- tprint({ps_name = ps_name, s = ">>>>>>>>>>>>>>>>>>>>>> TRIGGER"})
+      	 alerts_api.trigger(params.alert_entity, info, nil, params.cur_alerts)
+      else
+	 -- tprint({ps_name = ps_name, s = "---------------------- RELEASE"})
+      	 alerts_api.release(params.alert_entity, info, nil, params.cur_alerts)
+      end
+   end
+end
+
+-- #################################################################
+
+script = {
+  -- Script category
+  category = user_scripts.script_categories.internals,
+
+  -- This script is only for alerts generation
+  is_alert = true,
+
+  hooks = {
+    min = check_periodic_activity_not_executed,
+  },
+
+  gui = {
+    i18n_title = "alerts_dashboard.periodic_activity_not_executed",
+    i18n_description = "alerts_dashboard.periodic_activity_not_executed_descr",
+  }
+}
+
+-- #################################################################
+
+return script