code: public void setInstanceId (final String instanceId)
    {
      if (instanceId == null || instanceId.trim ().length () == 0)
      {
        throw new IllegalArgumentException ("Scheduler instanceId cannot be empty.");
      }
  
      m_sInstanceId = instanceId;
    }
docs: <p>
  Set the name for the <code>{@link QuartzScheduler}</code>.
  </p>
  
  @exception IllegalArgumentException
  if name is null or empty.