【高级技巧】故障自愈：异常检测与自动恢复的循环封装

local healers = {}
local detectors = {}
local function registerProbe(name, probeFn, healFn, threshold)
    detectors[name] = { probe = probeFn, heal = healFn,
        threshold = threshold, fails = 0, healed = 0 }
end
local function runProbes()
    for name, d in pairs(detectors) do
        local ok = d.probe()
        if ok then
            d.fails = 0
        else
            d.fails = d.fails + 1
            if d.fails >= d.threshold then
                d.heal()
                d.healed = d.healed + 1
                d.fails = 0
                print("[自愈] " .. name .. " 触发恢复，累计 " .. d.healed .. " 次")
            end
        end
    end
end

local rankQueue = {}
registerProbe("rank_queue", function()
    return #rankQueue < 5000
end, function()
    rankQueue = {}
end, 3)
setontimerex(51, 30000)
local function ontimerex51()
    runProbes()
end