[google-appengine] Unable to update: stops at uploading cron job

Unable to update: java.io.IOException: Error posting to URL: https://appengine.google.com/api/datastore/cron/update?app_id=mytwitauto&version=10&; 500 Internal Server Error Server Error (500) A server error has occurred. at com.google.appengine.tools.admin.ServerConnection.send(ServerConnection

[google-appengine] How to use datastore ?

i have created a program to get the chat messages from the user and send them to other users. like a group chat.i want my program to record messages that start with the word "@Record" or somethig like that to datastore. i am using java. pls send me a simple code that i can understand. -- You