openresty下的定时任务的实现

参考:http://www.shixinke.com/openresty/openresty-ngx-timer

下面这段是利用ngx.timer.every每天9点25分触发，触发精度是60s;想了想,链接里面的时间的触发频率低一些,也许更好一点;

http {
	init_worker_by_lua_block {
         local delay = 60  -- in seconds
         local interval_time = '0925'    -- 执行任务的时间点，格式可以随意，如02:00
         local log = ngx.log
         local ERR = ngx.ERR
         local check

         check = function(premature)
             if not premature then
             	local nowtime = os.date("%H%M")
             	if nowtime == interval_time then
             		log(ngx.ERR, ngx.today().." : create interval task success")
             	end
                -- log(ERR, "mm test mm test")
             end
         end

         if 0 == ngx.worker.id() then
             local ok, err = ngx.timer.every(delay, check)
             if not ok then
                 log(ERR, "failed to create timer: ", err)
                 return
             end
         end
    }
  ...