GWT, Google App Engine, TimerTask or Thread in ServiceImpl throw exception

Question

I am using GWT and Google App Engine. I have array of records and I want to update them every 30 mins. In the ServiceImpl I have the fallowing code :

Answer 1

you cannot - a background worker implies a thread, and thread creation in gae does not work.

The answer to your task is not to create a thread or background worker, but to use this http://code.google.com/appengine/docs/java/config/cron.html