code: public boolean pauseQuartzScheduler() {
          try {
              this.scheduler.standby();
              return true;
          } catch (SchedulerException e) {
              logger.error("error pausing quartz scheduler", e);
          }
          return false;
      }
docs: Pause the Quartz scheduler.
  
  @return <code>true</code> if paused, <code>false</code> otherwise
  
  @see QuartzService#pauseQuartzScheduler()