How to stop a scheduled task that was started using @Scheduled annotation?

Question

I have created a simple scheduled task using Spring Framework\'s @Scheduled annotation.

 @Scheduled(fixedRate = 2000)
 public void doSomething() {}
         


        

Answer 1

There is a bit of ambiguity in this question

1. When you say "stop this task", did you mean to stop in such a way that it's later recoverable (if yes, programmatically, using a condition which arises with in the same app? or external condition?)
2. Are you running any other tasks in the same context? (Possibility of shutting down the entire app rather than a task) -- You can make use of actuator.shutdown endpoint in this scenario

My best guess is, you are looking to shutdown a task using a condition that may arise with in the same app, in a recoverable fashion. I will try to answer based on this assumption.

This is the simplest possible solution that I can think of, However I will make some improvements like early return rather than nested ifs

@Component
public class SomeScheduledJob implements Job {

    private static final Logger LOGGER = LoggerFactory.getLogger(SomeScheduledJob.class);

    @Value("${jobs.mediafiles.imagesPurgeJob.enable}")
    private boolean imagesPurgeJobEnable;

    @Override
    @Scheduled(cron = "${jobs.mediafiles.imagesPurgeJob.schedule}")
    public void execute() {

        if(!imagesPurgeJobEnable){
            return;
        }
        Do your conditional job here...
   }

Properties for the above code

jobs.mediafiles.imagesPurgeJob.enable=true or false
jobs.mediafiles.imagesPurgeJob.schedule=0 0 0/12 * * ?