I decided to try Google App Engine for a personal project, that pulls yahoo weather at a regular time interval, but as I dived into Google App Engine then this simple thing can not be done in cron jobs, so I started to think about the solution, here is what I came up with, just the idea:
- Create a Cronjob class to handle the cronjob: this class will do the all the tasks that need to be done regularly
- Use javascript at client side to refresh the Cronjob page at a regular time interval.
I think the idea is simple, it does solve the problem but require you to have the page opened all the time. Some of you may have better idea?

gaeutilities Cron: http://code.google.com/p/gaeutilities/wiki/Cron
Scheduler Service: http://schedulerservice.appspot.com/
Well.. if you have access to some server where cron runs, just create some cron tasks to download pages from *.appspot.com/cron and it should run the script
Problem could be timeout.
Beter solution is if google would create some cron job site for appspot, but i havent seen such site yet.
i am testing it on my local appengine . created successfully a cron.yaml and its loaded. if visit the cron job URL the n it works properly but its not wrking outomatically , as it sould be. can you guyz plz help me on this.
cron:
- description: reguler stat calc job
url: /XXX/YYY/ZZZ/_cron_stats
schedule: every 1 minutes
nice engine, i’ll try to pimp my ride