Nodejs运行日常任务

Question

I want to run a nodejs function daily. I have pretty much decided to use node-schedule rather than a cron job.

The question is: Without a db what is the best way to ensure that I don't somehow run the function more than once? My though was to keep a log of each time I send out and double check by reading the log before sending and checking that I haven't sent yet today. I know that node-schedule shouldn't run more often than I tell it but someone might restart the script or something stupid, I want to be extra safe.

Note: I cannot setup a db due to limited access to the server.

Answer 1

One common solution is to create a pid file somewhere. If the pid file exists, exit the process early. Otherwise create the pid file (writing process.pid to it) and delete it when the process exits.