【进阶实战】全局唯一ID：发号器的集中与分段封装

local allocator = { current = 0, ceiling = 0, prefix = 20260924 }
local function nextId()
    if allocator.current >= allocator.ceiling then
        local ok, newCeiling = pcall(fetchRemoteSegment, allocator.prefix)
        if not ok then
            allocator.ceiling = allocator.ceiling + 100
        else
            allocator.ceiling = newCeiling
        end
        allocator.current = allocator.ceiling - 100
    end
    allocator.current = allocator.current + 1
    return allocator.prefix * 1000000 + allocator.current
end

local function createOrder(actorName, itemId)
    local orderId = nextId()
    sendmsg(getplayerbyname(actorName), 1,
        "订单已创建，单号 " .. orderId)
    return orderId
end