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mod_measure_storage/mod_measure_storage.lua @ 4764:a754f7e380b2
mod_dnsupdate: Rewrite port config vs DNS comparison code
I'm not sure if it was correct, which means it was hard to understand
and thus needed to be simplified. Hope this accomplishes that.
author | Kim Alvefur <zash@zash.se> |
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date | Mon, 08 Nov 2021 23:03:14 +0100 |
parent | 2693:04ae5b45e6c7 |
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module:set_global() local function return_args_after_calling(f, ...) f(); return ... end local function time_method(module, store_name, store_type, method_name, method_function) local opt_use_tags = module:get_option_boolean("measure_storage_tagged_metric", false); local metric_name, metric_tags; if opt_use_tags then metric_name, metric_tags = "storage_operation", ("store_name:%s,store_type:%s,store_operation:%s"):format(store_name, store_type, method_name); else metric_name = store_name.."_"..store_type.."_"..method_name; end local measure_operation_started = module:measure(metric_name, "times", metric_tags); return function (...) module:log("debug", "Measuring storage operation %s (%s)", metric_name, metric_tags or "no tags"); local measure_operation_complete = measure_operation_started(); return return_args_after_calling(measure_operation_complete, method_function(...)); end; end local function wrap_store(module, store_name, store_type, store) local new_store = setmetatable({}, { __index = function (t, method_name) local original_method = store[method_name]; if type(original_method) ~= "function" then if original_method then rawset(t, method_name, original_method); end return original_method; end local timed_method = time_method(module, store_name, store_type, method_name, original_method); rawset(t, method_name, timed_method); return timed_method; end; }); return new_store; end local function hook_event(module) module:hook("store-opened", function(event) event.store = wrap_store(module, event.store_name, event.store_type or "keyval", event.store); end); end function module.load() hook_event(module); end function module.add_host(module) hook_event(module); end