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annotate teal-src/prosody/plugins/mod_cron.tl @ 14229:ce31fdde0ad1 default tip

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net.unbound: Simplify conditional
author Kim Alvefur <zash@zash.se>
date Sat, 13 Jun 2026 11:35:18 +0200
parents 8b05340a94d3
children
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rev   line source
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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 cron_initial_delay = module:get_option_number("cron_initial_delay", 1);
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6 local cron_check_delay = module:get_option_number("cron_check_delay", 3600);
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7 local cron_spread_factor = module:get_option_number("cron_spread_factor", 0);
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8
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9 local record map_store<K,V>
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10 -- TODO move to somewhere sensible
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11 get : function (map_store<K,V>, string, K) : V
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12 set : function (map_store<K,V>, string, K, V)
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13 end
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14
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15 local enum frequency
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16 "hourly"
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17 "daily"
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18 "weekly"
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19 end
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20
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21 local record task_spec
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22 id : string -- unique id
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23 name : string -- name or short description
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24 when : frequency
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25 period : number
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26 last : integer
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27 run : function (task_spec, integer)
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28 save : function (task_spec, integer)
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29 restore : function (task_spec, integer)
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30 end
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31
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32 local record task_event
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33 source : module
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34 item : task_spec
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35 end
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36
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37 local active_hosts : { string : boolean } = { }
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38
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39 if prosody.process_type == "prosodyctl" then
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40 return -- Yes, it happens...
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41 end
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42
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43 function module.add_host(host_module : moduleapi)
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44
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45 local last_run_times = host_module:open_store("cron", "map") as map_store<string,integer>;
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46 active_hosts[host_module.host] = true;
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47
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48 local function save_task(task : task_spec, started_at : integer)
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49 last_run_times:set(nil, task.id, started_at);
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50 end
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51
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52 local function restore_task(task : task_spec)
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53 if task.last == nil then
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54 task.last = last_run_times:get(nil, task.id);
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55 end
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56 end
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57
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58 local function task_added(event : task_event) : boolean
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59 local task = event.item;
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60 if task.name == nil then
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61 task.name = task.when;
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62 end
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63 if task.id == nil then
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64 task.id = event.source.name .. "/" .. task.name:gsub("%W", "_"):lower();
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65 end
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66 task.period = host_module:get_option_period(task.id:gsub("/", "_") .. "_period", "1" .. task.when, 60, 86400*7*53);
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67 task.restore = restore_task;
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68 task.save = save_task;
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69 module:log("debug", "%s task %s added", task.when, task.id);
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70 return true
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71 end
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72
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73 local function task_removed(event : task_event) : boolean
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74 local task = event.item;
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75 host_module:log("debug", "Task %s removed", task.id);
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76 return true
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77 end
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78
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79 host_module:handle_items("task", task_added, task_removed, true);
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80
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81 function host_module.unload()
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82 active_hosts[host_module.host]=nil;
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83 end
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84 end
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85
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86 local function should_run(task : task_spec, last : integer) : boolean
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87 return not last or last + task.period * 0.995 <= os.time()
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88 end
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89
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90 local function run_task(task : task_spec)
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91 task:restore();
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92 if not should_run(task, task.last) then
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93 return
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94 end
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95 local started_at = os.time();
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96 task:run(started_at);
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97 task.last = started_at;
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98 task:save(started_at);
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99 end
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100
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101 local function spread(t : number, factor : number) : number
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102 return t * (1 - factor + 2*factor*math.random())
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103 end
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104
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105 local task_runner : async.runner_t<task_spec> = async.runner(run_task);
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106 scheduled = module:add_timer(cron_initial_delay, function() : number
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107 module:log("info", "Running periodic tasks");
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108 local delay = spread(cron_check_delay, cron_spread_factor);
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109 for host in pairs(active_hosts) do
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110 module:log("debug", "Running periodic tasks for host %s", host);
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111 for _, task in ipairs(module:context(host):get_host_items("task") as { task_spec } ) do
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112 task_runner:run(task);
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113 end
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114 end
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115 module:log("debug", "Wait %gs", delay);
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116 return delay
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117 end);
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118
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119 -- TODO measure load, pick a good time to do stuff
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120
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121 module:add_item("shell-command", {
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122 section = "cron";
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123 section_desc = "View and manage recurring tasks";
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124 name = "tasks";
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125 desc = "View registered tasks";
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126 args = {};
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127 handler = function (self, filter_host : string)
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128 local format_table = require "prosody.util.human.io".table;
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129 local it = require "prosody.util.iterators";
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130 local row = format_table({
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131 { title = "Host", width = "2p" };
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132 { title = "Task", width = "3p" };
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133 { title = "Desc", width = "3p" };
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134 { title = "When", width = "1p" };
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135 { title = "Last run", width = "20" };
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136 }, self.session.width);
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137 local print = self.session.print;
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138 print(row());
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139 for host in it.sorted_pairs(filter_host and { [filter_host]=true } or active_hosts) do
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140 for _, task in ipairs(module:context(host):get_host_items("task")) do
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141 print(row { host, task.id, task.name, task.when, task.last and os.date("%Y-%m-%d %R:%S", task.last) or "never" });
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142 end
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143 end
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144 end;
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145 });