关闭服务.

Execute one-time command.

处理进程的信号量.

HandleUserCmd use to stop/reload the proxy service.

读取文件的进程号.

监听信号量.

Start Cron Schedule.

Start proxy with config file.

Start Job Worker.

Stop proxy.

阻塞等待程序内部的Stop通道信号.

将进程号写入文件.