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annotate mod_measure_storage/mod_measure_storage.lua @ 4515:2e33eeafe962

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mod_muc_markers: Prevent any markers from reaching the archive, even if untracked Original intention was to leave alone things that this module isn't handling. However markers in archives are just problematic without more advanced logic about what is markable and what is not. It also requires a more advanced query in mod_muc_rai to determine the latest markable message instead of the latest archived message. I'd rather keep the "is archivable" and "is markable" definition the same for simplicity. I don't want to introduce yet another set of rules for no reason. No markers in MAM.
author Matthew Wild <mwild1@gmail.com>
date Mon, 22 Mar 2021 15:55:02 +0000
parents 04ae5b45e6c7
children
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992e40dab31d mod_measure_storage: Experimental new module to measure storage API operations (requires 0.10)
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1 module:set_global()
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2
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3 local function return_args_after_calling(f, ...)
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4 f();
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5 return ...
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6 end
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8 local function time_method(module, store_name, store_type, method_name, method_function)
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9 local opt_use_tags = module:get_option_boolean("measure_storage_tagged_metric", false);
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10
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11 local metric_name, metric_tags;
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12 if opt_use_tags then
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13 metric_name, metric_tags = "storage_operation", ("store_name:%s,store_type:%s,store_operation:%s"):format(store_name, store_type, method_name);
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14 else
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15 metric_name = store_name.."_"..store_type.."_"..method_name;
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16 end
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17 local measure_operation_started = module:measure(metric_name, "times", metric_tags);
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19 return function (...)
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20 module:log("debug", "Measuring storage operation %s (%s)", metric_name, metric_tags or "no tags");
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21 local measure_operation_complete = measure_operation_started();
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22 return return_args_after_calling(measure_operation_complete, method_function(...));
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23 end;
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24 end
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25
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26 local function wrap_store(module, store_name, store_type, store)
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27 local new_store = setmetatable({}, {
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28 __index = function (t, method_name)
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29 local original_method = store[method_name];
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30 if type(original_method) ~= "function" then
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31 if original_method then
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32 rawset(t, method_name, original_method);
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33 end
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34 return original_method;
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35 end
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36 local timed_method = time_method(module, store_name, store_type, method_name, original_method);
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37 rawset(t, method_name, timed_method);
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38 return timed_method;
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39 end;
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40 });
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41 return new_store;
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42 end
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43
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44 local function hook_event(module)
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45 module:hook("store-opened", function(event)
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46 event.store = wrap_store(module, event.store_name, event.store_type or "keyval", event.store);
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47 end);
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48 end
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49
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50 function module.load()
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51 hook_event(module);
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52 end
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53
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54 function module.add_host(module)
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55 hook_event(module);
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56 end