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prosody
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util/throttle.lua @ 10688:83668e16b9a3
MUC: Switch to new storage format by default
Changing the default setting of `new_muc_storage_format` from false to true.
The code supports reading both formats since 0.11, but servers with MUCs stored
using the new format will not be able to downgrade to 0.10 or earlier.
The new format is clearer (less nesting for the most commonly-accessed data),
and combined with the new map-store methods, allows for some operations to become
more efficient (such as finding out which MUCs on a service a given user is affiliated
with).
author | Matthew Wild <mwild1@gmail.com> |
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date | Thu, 12 Mar 2020 16:10:44 +0000 |
parent | 8555:4f0f5b49bb03 |
child | 12975:d10957394a3c |
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local gettime = require "util.time".now local setmetatable = setmetatable; local _ENV = nil; -- luacheck: std none local throttle = {}; local throttle_mt = { __index = throttle }; function throttle:update() local newt = gettime(); local elapsed = newt - self.t; self.t = newt; local balance = (self.rate * elapsed) + self.balance; if balance > self.max then self.balance = self.max; else self.balance = balance; end return self.balance; end function throttle:peek(cost) cost = cost or 1; return self.balance >= cost or self:update() >= cost; end function throttle:poll(cost, split) if self:peek(cost) then self.balance = self.balance - cost; return true; else local balance = self.balance; if split then self.balance = 0; end return false, balance, (cost-balance); end end local function create(max, period) return setmetatable({ rate = max / period, max = max, t = gettime(), balance = max }, throttle_mt); end return { create = create; };