Question

how can we schedule a cron job to run just once on google app engine for java?

i tried to set a very large value like every 1000 years but doesnt seems to work.

any other option? syntax used is:

  <cron>
    <url>/AdHocScriptJob</url>
    <description>Run adhoc script</description>
    <schedule>every 200 minutes</schedule>
    <timezone>Asia/Calcutta</timezone>
  </cron>

i tried to look at https://developers.google.com/appengine/docs/java/config/cron

Answer 1

That’s what task queues are for: https://developers.google.com/appengine/docs/java/taskqueue/overview

Alternatively, you may delete the cron configuration after the task executes or make your code idempotent (e.g. by mixing it with a pull queue).