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annotate mod_measure_storage/mod_measure_storage.lua @ 4730:1da4b815d2fe

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mod_cloud_notify: Identify (and immediately push) urgent stanzas, e.g. calls This covers the following things: - A session that appears online, but has a broken TCP connection - Clients such as Siskin and Snikket iOS that require a push for calls to work It allows the stanza to be pushed immediately instead of waiting for the session to hibernate or an ack to timeout. It shouldn't break any existing cases.
author Matthew Wild <mwild1@gmail.com>
date Wed, 27 Oct 2021 19:12:03 +0100
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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54 function module.add_host(module)
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55 hook_event(module);
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56 end