Create a Status Cron Event to check jobs are running correctly and remove old completed jobs.

Acceptance Criteria

Cron Schedule

• Scheduled a new event using the wp_schedule_event function.
• The event is scheduled with the following parameters
  • timestamp: time()
  • recurrence: hourly
  • hook: perflab_background_process_status_check

Event hook
Create a new function for the perflab_background_process_status_check hook that checks the following

Check jobs are running correctly

• Query jobs that are currently running with get_terms
• Retrieve running jobs by querying for terms with the job_status meta and the value running.
• If no terms are returned continue to next check.
• If terms are passed, loop over each term and check the following:
  • Retrieve the job_lock term meta value
  • Check the job_lock value against the ini_get( 'max_execution_time' )
  • If the job_lock meta exists and the value is less than the max_execution_time continue to the next term
  • If the job_lock meta does not exist or the value is greater the max_execution_time restart the job by calling perflab_start_background_job passing the $job_id

Remove old completed jobs

• Query jobs that are currently running with get_terms
• Retrieve running jobs by querying for terms with the job_status meta and the value completed.
• If no terms are returned exit early.
• If terms are passed, loop over each term and check the following:
  • Retrieve the job_completed_at term meta value
  • If the job_completed_at meta exists and the timestamp value is older than 7 days, the term is deleted.