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annotate mod_reload_modules/mod_reload_modules.lua @ 4578:d95fcde6e39d

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mod_measure_lua: add openmetrics-spirited way to collect lua memory use In the spirit of separate collectors found in other Prometheus packages, this is a separate module to collect metrics related to the lua stack itself.
author Jonas Schäfer <jonas@wielicki.name>
date Sat, 29 May 2021 12:12:17 +0200
parents 3b8f4f3b1718
children cc14bfec209b
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1 local array, it, set = require "util.array", require "util.iterators", require "util.set";
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2 local mm = require "core.modulemanager";
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3
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4 function reload_all()
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5 local modules = module:get_option_set("reload_modules", {});
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6 if not modules then
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7 module:log("warn", "No modules listed in the config to reload - set reload_modules to a list");
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8 return;
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9 end
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10 local configured_modules = module:get_option_inherited_set("modules_enabled", {});
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11 -- ignore removed hosts
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12 if not prosody.hosts[module.host] then
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13 module:log("warn", "Ignoring host %s: host was removed...", module.host);
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14 return;
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15 end
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16 local loaded_modules = set.new(array.collect(it.keys(prosody.hosts[module.host].modules)));
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17 local need_to_load = set.intersection(configured_modules - loaded_modules, modules);
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18 local need_to_unload = set.intersection(loaded_modules - configured_modules, modules);
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20 for module_name in need_to_load do
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21 module:log("debug", "Loading %s", module_name);
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22 mm.load(module.host, module_name);
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23 end
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25 for module_name in need_to_unload do
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26 module:log("debug", "Unloading %s", module_name);
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27 mm.unload(module.host, module_name);
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28 end
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30 modules:exclude(need_to_load+need_to_unload)
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32 for module_name in set.intersection(modules,configured_modules) do
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33 module:log("debug", "Reloading %s", module_name);
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34 mm.reload(module.host, module_name);
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35 end
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37 local global_modules = module:get_option_set("reload_global_modules", {});
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38 for module_name in global_modules do
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39 module:log("debug", "Global reload of mod_%s", module_name);
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40 mm.reload("*", module_name);
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41 end
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42 end
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45 if module.hook_global then
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46 module:hook_global("config-reloaded", reload_all);
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47 else -- COMPAT w/pre-0.9
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48 function module.load()
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49 prosody.events.add_handler("config-reloaded", reload_all);
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50 end
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51 function module.unload()
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52 prosody.events.remove_handler("config-reloaded", reload_all);
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53 end
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54 end