code: @Nonnull
    public TriggerKey scheduleJobNowOnce (@Nonnull final String sJobName,
                                          @Nonnull final Class <? extends IJob> aJobClass,
                                          @Nullable final Map <String, ? extends Object> aJobData)
    {
      return scheduleJob (sJobName,
                          JDK8TriggerBuilder.newTrigger ()
                                            .startNow ()
                                            .withSchedule (SimpleScheduleBuilder.simpleSchedule ()
                                                                                .withIntervalInMinutes (1)
                                                                                .withRepeatCount (0)),
                          aJobClass,
                          aJobData);
    }
docs: Schedule a new job that should be executed now and only once.
  
  @param sJobName
  Name of the job - must be unique within the whole system!
  @param aJobClass
  The Job class to be executed.
  @param aJobData
  Optional job data map.
  @return The created trigger key for further usage. Never <code>null</code>.