I'm looking for advice on implementing a batch spring boot scheduler configured from DB

Hello everyone.
I hope to be helpful by submitting this question, since I don't know well how to structure batches with spring boot.
I'm trying to understand if the code I wrote can run into any problems and how I could improve it. I quickly created this portion of code with the intention of running the batch once a day (because I don't have the possibility to keep the application running for more than 8 hours a day ) and to run a job at a pre-established time defined in a database. I want to use spring libraries only. Forgive me about using regular standard output, I hope the code comments itself:
@Component @EnableScheduling public class MyScheduler { @Autowired private JobLauncher jobLauncher; @Autowired private Job job; @Autowired private TaskScheduler taskScheduler; @Autowired private ApplicationContext applicationContext; @Autowired private JobConfigDAO jobConfigDAO; @PostConstruct public void scheduleJob() { JobConfig jobConfig = jobConfigDAO.findByJobName("TEST"); if (jobConfig == null) { return; } CronTrigger cronTrigger = new CronTrigger(jobConfig.getSchedule()); SimpleTriggerContext triggerContext = new SimpleTriggerContext(); Date starttime = cronTrigger.nextExecutionTime(triggerContext); System.out.println("scheduled for " + starttime.toString()); ScheduledFuture<?> scheduledTask = taskScheduler.schedule(() -> { try { JobExecution jobExecution = jobLauncher.run(job, new JobParametersBuilder().addLong("run.id", System.currentTimeMillis()).toJobParameters()); } catch (Exception e) { System.err.println("ERROR:" + e.getMessage()); } }, starttime); Executor executor = Executors.newSingleThreadExecutor(); executor.execute(() -> { try { System.out.println("WAIT..."); Object result = scheduledTask.get(); System.out.println("DONE!!!"); scheduledTask.cancel(true); ((ConfigurableApplicationContext)applicationContext).close(); System.exit(0); } catch (InterruptedException | ExecutionException e) { System.err.println("ERROR:" + e.getMessage()); } }); } }
I would like the application to terminate when the job is executed, for this reason I have created an Executor which in parallel verifies that the scheduler task is complete and then cancels the task scheduler and exit from application, I would like to understand if there is a better methodology.
Is there a spring boot pattern i can follow for better implementation?

You may find @Scheduled annotation for a method helpful.
Here is the tutorial:
https://www.baeldung.com/spring-scheduled-tasks

Something to keep in mind when running batch processes is that if you don't actually need a webapp, there are alternatives to Spring Boot.

The Apache service-manager/Karafe projects (I can't remember which is a superset of the other) provide an OSGi container that can run this sort of stuff and you can use Spring to write apps for those containers.