【进阶实战】Lua熔断器：沙巴克指挥接口的自动跳闸

local function call(actor)
    fetchRemote()                    -- 失败也照发，风暴不歇
end

local fails, state, openedAt = 0, "CLOSE", 0
local function call(actor)
    if state == "OPEN" then
        if os.time() - openedAt < 30 then return nil end
        state = "HALF"               -- 冷却完放行试探
    end
    local ok = fetchRemote()
    if ok then
        fails, state = 0, "CLOSE"
        return ok
    end
    fails = fails + 1
    if fails >= 5 then
        state, openedAt = "OPEN", os.time()   -- 跳闸30秒
        sendmsg(actor, 1, "沙巴克指挥接口熔断")
    end
    return nil
end