code: @Override
      public void start(final Infrastructure infra) {
          try {
              final OutputQuartzHelper outputQuartzHelper = new OutputQuartzHelper();
              final JobDetail jobDetail = outputQuartzHelper.getJobDetail(outputInvoker);
              final Trigger trigger = outputQuartzHelper.getCronTrigger(cronExpression);
              scheduler = StdSchedulerFactory.getDefaultScheduler();
              scheduler.scheduleJob(jobDetail, trigger);
              scheduler.start();
          } catch (final SchedulerException se) {
              LOGGER.error("Error occurred while starting the cron scheduler : " + se.getMessage(), se);
          }
      }
docs: /*
  (non-Javadoc)
  
  @see com.nokia.dempsy.output.OutputExecuter#start()