view mod_log_events_by_cpu_usage/mod_log_events_by_cpu_usage.lua @ 4670:1b81b7269858

mod_http_oauth2: Gracefully handle cache write failure Would previously have thrown an error and probably returned a traceback. This would only happen if a *lot* of authorization codes were requested in a short interval.
author Kim Alvefur <zash@zash.se>
date Thu, 02 Sep 2021 23:06:58 +0200
parents c0bc97c0ba61
children
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module:set_global();

local treshold = module:get_option_number("log_cpu_threshold", 0.01);

function event_wrapper(handlers, event_name, event_data)
	local cpu_before = os.clock();
	local ret = handlers(event_name, event_data);
	local cpu_after = os.clock();
	if (cpu_after - cpu_before) > treshold then
		module:log("warn", "%g seconds of CPU usage while processing event '%s'", (cpu_after - cpu_before), event_name);
	end
	return ret;
end

local http_events = require "net.http.server"._events;
module:wrap_object_event(http_events, false, event_wrapper);

module:wrap_event(false, event_wrapper);
function module.add_host(module)
	module:wrap_event(false, event_wrapper);
end