Deploying with JRuby 9k

Scheduling a Recurring Job

Jobs are components that execute on a schedule instead of in response to user action. In the case of Twitalytics, the schedule is recurring, but other jobs could be a one-time event. With TorqueBox, jobs like this run asynchronously in the background, but they still execute within the same JVM process as the rest of the application.

Twitalytics has a recurring job that removes old status updates from the database. It’s located in the lib/jobs/delete_old_statuses.rb file, and it looks like this:

twitalytics/lib/jobs/delete_old_statuses.rb

class DeleteOldStatuses
  def run
    ids = Status.where("created_at < ?", 30.days.ago)

    if ids.size > 0
      Status.destroy(ids)
      puts "#{ids.size} statuses have ...