ngx timer

local delay=3
local handle

handle = function(param1,param2)
    if param1 then
        return
    end
    ngx.log(ngx.ERR,"param is " ..param2)
    ngx.timer.at(delay,handle,"hello timer again")
end

local ok,err = ngx.timer.at(delay,handle,"hello timer")

[lua] test.lua:8: param is hello timer, context: ngx.timer, client: xxx, server: 0.0.0.0:6699
[lua] test.lua:8: param is hello timer again, context: ngx.timer, client: xxx, server: 0.0.0.0:6699